2025

学会発表

Rui Zhang, Yohei Aikawa, Hiroyuki Uenohara, "Performance Optimization of Optical Decoders Using Multimode Interferometers", 30th OptoElectronics and Communications Conference/Photonics in Switching and Computing 2025 (OECC/PSC 2025), Jun., 2025.
Yohei Aikawa, Hiroyuki Uenohara, "Reconfigurable Optical Decoder and Half-adder Composed of Unitary Converter", 30th OptoElectronics and Communications Conference/Photonics in Switching and Computing 2025 (OECC/PSC 2025), Jun., 2025.
Yuya Sugiyama, Hiroyuki Uenohara, "Low polarization dependent Silicon Photonics 1×2 MZI-based pn-junction switch with mode converter and MMIs", the 30th Optoelectronics and Communication Conference (OECC2025), Jun., 2025.
Onon Bayarsaikhan, Hiroyuki Uenohara, "Investigation of crosstalk suppression technique for 16QAM non-orthogonal WDM signals with heterogeneous bandwidths", the 30th Optoelectronics and Communication Conference (OECC2025), Jun., 2025.

2024

論文

Yohei Aikawa, Hiroyuki Uenohara, "Optical Digital Decoder Consisting of 4×4 Multi-Mode Interferometer Coupler", Journal of Lightwave Technology, vol. 44, no. 22, pp. 7929-7936, Nov., 2024.
Yohei Aikawa, Hiroyuki Uenohara, "High-Contrast QPSK Pattern Recognition Device Consisting of a 4×4 MMI Coupler", Electronics Letters, vol. 60, no. 21, Oct., 2024.
Kaoru Asaba, Tomoyuki Miyamoto, "Real-Time Tracking of Photovoltaics by Differential Absorption Imaging in OpticalWireless Power Transmission", MDPI/Photonics, Vol. 11, 490, May., 2024.
Chen Zuo, Tomoyuki Miyamoto, "Camera-Based Safety System for Optical Wireless Power Transmission Using Dynamic Safety-Distance", MDPI/Photonics, Vol. 11, 500, May., 2024.

学会発表

Chen Zuo, Tomoyuki Miyamoto, "3D-Camera Based Optical Wireless Power Transmission Safety System for Light Beam Scanning Applications", The 29th MICROOPTICS Conference (MOC2024), Oct., 2024.
Chen Zuo, Tomoyuki Miyamoto, "Advanced Safety System for Optical Wireless Power Transmission", Aug., 2024.
Mingzhi Zhao, Tomoyuki Miyamoto, "LED based high-performance and automatic optical wireless power transmission for IoT", Aug., 2024.
Fumio Koyama, "High Speed VCSEL Photonics Toward 200Gbps/ch or Beyond", Internaitonal Nano-Optoelectronics Workshop 2024, Jul., 2024.
Mingzhi Zhao, Tomoyuki Miyamoto, "0.8W class optical wireless power transmission via LED beam for supplying Arduino-based IoT sensor", the 29th Opto-Electronics and Communications Conference 2024 (OECC2024), Jul., 2024.
Daisuke Takeuchi, Hiroyuki Uenohara, "Characterization of switch operation and demonstration of space division multiplexing effectiveness for 6✕8 optical switches", the 29th Optoelectronics and Communication Conference (OECC2024), Jul., 2024.
Yohei Aikawa, Hiroyuki Uenohara, "Steady-state characteristics of 2-bit Optical Decoder based on 4x4 Multi-mode Interferometer Coupler", The 29th Opto-Electronics and Communications Conference (OECC 2024), Jun., 2024.

2023

論文

Kaoru Asaba, Tomoyuki Miyamoto, "Attitude Determination of Photovoltaic Device by Means of Differential Absorption Imaging", MDPI/Photonics, vol. 11, no. 111, 2023.
Kaoru Asaba, Tomoyuki Miyamoto, "Positioning of a photovoltaic device on a real two-dimensional plane in optical wireless power transmission by means of infrared differential absorption imaging", MDPI/Photonics, vol. 10, no. 10, Sep., 2023.
Changxin Rin, Hiroyuki Uenohara, "Enhancing Signal Quality in Dense Wavelength Division Multiplexed Systems by Eliminating Crosstalk with Cascaded Optical Bandpass Filters", Optics Continuum, vol. 2, no. 9, pp. 2030-2043, Sep., 2023.
Mingzhi Zhao, Tomoyuki Miyamoto, "Efficient LED-array optical wireless power transmission system for portable power supply and its compact modularization", MDPI/Photonics, vol. 10, no. 7, Jul., 2023.
Yohei Aikawa, Hiroyuki Uenohara, "An optical digital‐to‐analog converter with a built‐in intensity converter consisting of silicon waveguide", IET Optoelectronics, vol. 17, no. 5, pp. 214-219, Jun., 2023.
Kaoru Asaba, Tomoyuki Miyamoto, "Solar cell detection and position, attitude determination by differential absorption imaging in optical wireless power transmission", MDPI/Photonics, vol. 10, no. 5, May., 2023.

学会発表

Fumio Koyama, "VCSEL Photonics for Opticallnterconnects and 3D Sensing", Asian VCSEL DAY 2023, Oct., 2023.
Fumio Koyama, "High-Speed VCSEL Photonics for Data Center Networks", 2nd International Conference and Expo on Lasers, Optics & Photonics, Oct., 2023.
Chang Ge, Liang Dong, Xiaodong Gu, Fumio Koyama, "Uncooled Operations of 100Gbps 1060nm Single-mode Metalaperture VCSEL for Standard SMF Transmission", ECOC2023, ThB4.3, Oct., 2023.
Mingzhi Zhao, Tomoyuki Miyamoto, "Increased transmission distance range in LED-based optical wireless power transmission using liquid lens", 28th Microoptics Conference (MOC2023), Sep., 2023.
Mingzhi Zhao, Tomoyuki Miyamoto, "Liquid lens-based LED optical wireless power transmission system for enhancing transmission distance", The 84th Autumn Meeting of JSAP, Sep., 2023.
Yuya Sugiyama, Hiroyuki Uenohara, "Low-Polarization-Dependent 1×2 Carrier-Injection-Type Silicon Photonics Switch", International Conference on Photonics in Switching and Computing 2023 (PSC2023),, Sep., 2023.
Tailai Jin, Hiroyuki Uenohara, "Investigation of low latency WDM-parallel label processing of optical switching system with pn-junction-type silicon photonics switch for edge/cloud computing platform", International Conference on Photonics in Switching and Computing 2023 (PSC2023),, Sep., 2023.
Padullaparthi Babudayal, Chang Ge, Liang Dong, Xiaodong Gu, Satoshi Shinada, Fumio Koyama, "Long-reach, 50Gb/s NRZ transmission of uncooled 1060nm single-mode coupled cavity VCSELs", The 84th JSAP Autumn Meeting 2023, 23a-A308-8, Sep., 2023.
Yohei Aikawa, Hiroyuki Uenohara, "2-bit Optical Decoder based on 4x4 Multi-mode Interferometer Coupler for BPSK-modulated signals", 2023 Photonics in Switching and Computing (PSC 2023), Sep., 2023.
Tomoya Watamura, Tomoyuki Miyamoto, "Flight height extension of micro-drones by light beam shape control of optical wireless power transmission", 28th Microoptics Conference (MOC2023), Sep., 2023.
Tomoyuki Miyamoto, Yamato Takahashi, Yuha Tai, "High power and long distance underwater optical wireless power transmission", URSI General Assembly and Scientific Symposium 2023, Aug., 2023.
Fumio Koyama, "VCSEL Photonics for High-speed Interconnects and 3D Sensing", The OptoElectronics and Communications Conference 2023, Jul., 2023.
Satoshi Shimizu, Chang Ge, Liang Dong, Xiaodong Gu, Atsushi Matsumoto, Satoshi Shinada, Fumio Koyama, "Record High-baud-rate 128-Gbit/s NRZ-OOK Direct Modulation of 1060-nm Single-mode VCSEL for Transmission", The OptoElectronics and Communications Conference 2023, OECC2023-0526-7, Jul., 2023.
Fumio Koyama, "VCSEL photonics for communications and 3D sensing.", The International Nano-Optoelectronics Workshop 2023, Jul., 2023.
Fumio Koyama, "VCSEL photonics for communications and 3D sensing.", The International Nano-Optoelectronics Workshop 2023, Jul., 2023.
Chang Ge, Liang Dong, Xiaodong Gu, Fumio Koyama, "1060nm Single-mode Intra-cavity Metal- 1060nm Single-mode Intra-cavity Metal aperture VCSEL for over 2km Standard 1300nm SMF aperture VCSEL for over 2km Standard 1300nm SMF Transmission", CLEO/Europe-EQEC 2023, STh4Q.2, May., 2023.

2022

論文

Kaoru Asaba, Tomoyuki Miyamoto, "Relaxation of beam irradiation accuracy of cooperative optical wireless power transmission in terms of fly eye module with beam confinement mechanism", MDPI/Photonics, vol. 9, no. 12, 2022.
Kaoru Asaba, Kenta Moriyama, Tomoyuki Miyamoto, "Preliminary characterization of robust detection method of Solar Cell Array for optical wireless power transmission with differential absorption image sensing", MDPI/Photonics, vol. 9, no. 11, Nov., 2022.
Shun Matsuo, Hiroyuki Uenohara, "Wide Wavelength Selectable and High Frequency Precision of All-Optical Wavelength Conversion Using Pump Light Generated from Optical Combs and SSB Modulation", Journal of Lightwave Technology, vol. 40, no. 21, pp. 7006-7013, Nov., 2022.
Yuha Tai, Tomoyuki Miyamoto, "Experimental characterization of high tolerance to beam irradiation conditions of light beam power receiving module for optical wireless power transmission equipped with a fly-eye lens system", MDPI/Energies, vol. 15, no. 19, Oct., 2022.
Naoki Matsunaga, Hiroyuki Uenohara, "Operating Performance of Silicon Photonic Optical Switches Integrated with WDM filters for Low-Latency Edge-Computing Platforms", Optics Continuum, vol. 1, no. 9, pp. 1977-1989, Sep., 2022.
Mingzhi Zhao, Tomoyuki Miyamoto, "1 W high performance LED-array based optical wireless power transmission system for IoT terminals", MDPI/Photonics, vol. 9, no. 8, Aug., 2022.
Shin Takano, Hiroyuki Uenohara, "DBP with modified field intensity averaging for low-complexity digital coherent systems", Optics Continuum, vol. 1, no. 7, pp. 1613-1627, Jul., 2022.
Kaoru Asaba, Tomoyuki Miyamoto, "System level requirement analysis of beam alignment and shaping for optical wireless power transmission system by semi–empirical simulation", MDPI/Photonics, vol. 9, no. 7, Jun., 2022.
Liang Dong, Xiaodong Gu, Shanting Hu, Fumio Koyama, "Densely packed 1.1 μm band vertical cavity surface emitting laser array for co-packaged optics", Japanese Journal of Applied Physics, Vol. 61, No. SK, pp. 1011-1-7, Jun., 2022.
Shanting Hu, Xiaodong Gu, Hameeda Ibrahim, Masanori Nakahama, Satoshi Shinada, Fumio Koyama, "1060-nm single-mode transverse coupled cavity VCSEL with intra-cavity surface relief for 58-Gbps modulation and 5-km single-mode fiver transmission", Applied Physics Letters, 120.261110 (2022), pp. 120.261110-1-6, Jun., 2022.
Chang Ge, Ahmed Mohamed Ahmed Hassan, Shanting Hu, Fumio Koyama, "Modeling of surface grating-loaded VCSEL with slowing light", Japanese Journal of Applied Physics, Vol. 61, No. SK, pp. SK1010-1-5, Jun., 2022.

学会発表

Yuha Tai, Tomoyuki Miyamoto, "Increased output power of fly-eye lens based light receiver module with 450nm-monochromatic beam and GaAs PV for underwater optical wireless power transmission", The 33rd International Photovoltaic Science and Engineering Conference (PVSEC-33), Nov., 2022.
Fumio Koyama, "VCSEL Photonics for Interconnects and 3D Sensing", International Conference and Expo on Lasers, Optics & Photonics, Nov., 2022.
Shanting Hu, Xiaodong Gu, Hameeda Ibrahim, Fumio Koyama, "5-km Single-mode Fiber Data Transmission with 1060nm Single-mode Intra-cavity Surface Relief Transverse Coupled Cavity VCSELs", 28th IEEE International Semiconductor Laser Conference(ISLC2022), TuC-01, Oct., 2022.
Shiyunsuke Kanjiya, Shanting Hu, Xiaodong Gu, Fumio Koyama, "Expanding Field of View of Solid-state VCSEL Beam Scanner with Multi-wavelength Seed VCSELs", 28th International Semiconductor Laser Conference, ISLC2022, TuB-04, Oct., 2022.
Yikai Song, Ruixiao Li, Xiaodong Gu, Fumio Koyama, "Beam-curvature-compensation of Solid-state VCSEL Beam Scanner using Curved Prism Mirror", 28th International Semiconductor Laser Conference, ISLC2022, TuB-06, Oct., 2022.
Mingzhi Zhao, Tomoyuki Miyamoto, "Design of LED based optical wireless power transmission system for increased transmission distance", The 83rd Autumn Meeting of JSAP, Sep., 2022.
Fumio Koyama, "High-speed VCSEL Photonics for Datacenter Networks", 2022 URSI-Japan Radio Science Meeting Tokyo, Sep., 2022.
Chang Ge, Xiaodong Gu, Fumio Koyama, "Modeling of Surface Grating-loaded VCSEL for Vertical Emission", The 83rd JSAP Autumn Meeting 2022, E 22a-C101-11, Sep., 2022.
Liang Dong, Xiaodong Gu, Fumio Koyama, "1060nm Single-mode Bottom Emitting VCSEL Array for Multi-core Fiber Co-packaged Optics Transceivers", The 83rd JSAP Autumn Meeting 2022, E 21a-C301-7, Sep., 2022.
Boxuan Zhang, Xiaodong Gu, Susumu Kinoshita, Fumio Koyama, "Bending-Fiber Mode Filter Evaluation for 1060nm Data Transmission in Conventional Single-Mode Fiber", 2022IEICE Society Conference, C-3/4-59, Sep., 2022.
Fumio Koyama, "Beam-Curvature-Compensated Solid-State Beam Scanner Integrated With Multi-Grating Pitch Tunable Slow-Light VCSELs for Enhanced Field of View", The European Conference on Optical Communication, ECOC 2022 BASEL, Tu3E.5, Sep., 2022.
Liang Dong, Xiaodong Gu, Fumio Koyama, "1060nm Single-mode Bottom Emitting VCSEL Array with Intra-cavity Metal-aperture for Multi-core Fiber Co-packaged Optics Transceivers", Extended Abstracts of the 2022 International Conference on Solid State Devices and Materials, Makuhari, 54th International Conference on Solid State Devices and Materials(SSDM), A-6-01, pp. 31-32, Sep., 2022.
Naoki Matsunaga, Hiroyuki Uenohara, "Silicon Photonics Optical Switch Performance Integrated with WDM filters for Low-Latency Edge-Computing Platform", International Conference on Photonics in Switching and Computing 2022 (PSC2022), Jul., 2022.
Changxin Rin, Hiroyuki Uenohara, "Crosstalk Suppression for Improving Quality of Densely Overlapped Wavelength Division Multiplexed Signals with Cascaded BPFs", the 27th Optoelectronics and Communication Conference (OECC2022), Jul., 2022.
Hayato Aida, Hiroyuki Uenohara, "Switching Operation of PN-Junction-Type Silicon Photonics Optical Switch Driven by Label-Controlled FPGA", the 27th Optoelectronics and Communication Conference (OECC2022), Jul., 2022.
Hameeda Ibrahim, Xiaodong Gu, Ahmed Mohamed Ahmed Hassan, Satoshi Shinada, Moustafa Ahmed, Fumio Koyama, "Single-Mode 1060nm Bottom Emitting Metal Aperture VCSEL Array for Co-Packaged Optics", CLEO 2022, STu5E.6 (2022), May., 2022.
Ruixiao Li, Shanting Hu, Xiaodong Gu, Satoshi Shinada, Fumio Koyama, "Electrically-Driven 2D Multi-Beam Steering With Large Field of View by Using VCSEL Scanner Array", CLEO 2022, STu5E.7 (2022), May., 2022.
Fumio Koyama, "High-speed VCSEL photonics for datacenter networks", Semiconductor Lasers and Laser Dynamics X, PC1214104, May., 2022.

2021

論文

Mingzhi Zhao, Tomoyuki Miyamoto, "Optimization for compact and high output LED-based optical wireless power transmission system", Photonics, vol. 9, no. 1, 2021.
Shanting Hu, Xiaodong Gu, Masanori Nakahama, Fumio Koyama, "Non-mechanical beam scanner based on VCSEL integrated amplifier with resonant wavelength detuning design", CHINESE OPTICS LETTERS, Vol. 19, No. 12, pp. 121403-1-6, 2021.
Zhou Killa, Tomoyuki Miyamoto, "Tolerant distance and alignment deviation analysis of LED-based portable optical wireless power transmission system for compact IoT", IEEJ Transactions on C, vol. 141, no. 12, pp. 1274-1280, 2021.
Ahmed Mohamed Ahmed Hassan, Xiaodong Gu, Masanori Nakahama, Satoshi Shinada, Moustafa Ahmed, Fumio Koyama, "High-power operations of single-mode surface grating long oxide aperture VCSELs", Applied Physics Letters, 119, 191103-8 (2021), Nov., 2021.
Ruixiao Li, Shanting Hu, Xiaodong Gu, Fumio Koyama, "Compact solid-state vertical-cavity-surface-emitting-laser beam scanning module with ultra-large field of view", Applied Physics ExpressLETTER, Vol. 14, No. 11, p. 112005-1-5 (2021), Nov., 2021.
Hameeda Ibrahim, Ahmed Magdi Hassan Musa, Xiaodong Gu, Moustafa Ahmed, Fumio Koyama, "Static and dynamic characteristics of double transverse coupled cavity VCSELs for high speed modulations", IEICE Electronics Express, Vol. 18, No. 22, p. 20210419, Nov., 2021.
Ahmed Mohamed Ahmed Hassan, Xiaodong Gu, Masanori Nakahama, Satoshi Shinada, Moustafa Ahmed, Fumio Koyama, "High power surface grating slow-light VCSEL", Appl. Phys. Express, Vol. 14, 092006, pp. 1-6, Aug., 2021.
Shanting Hu, Fumio Koyama, "Coupled mode analysis of high-speed transverse coupled cavity vertical-cavity surface-emitting laser for low frequency chirp operations", IEICE Electronics Express, Vol. 18, No. 13, p. 20210239, Jul., 2021.
Shanting Hu, Ahmed Mohamed Ahmed Hassan, Xiaodong Gu, Masanori Nakahama, Fumio Koyama, "Surface Grating Loaded VCSEL with Single Mode Power of over 80 mW", IEICE Electronics Express, vol. 18, no. 11, p. 20210202, Jun., 2021.
Shanting Hu, Ahmed Mohamed Ahmed Hassan, Xiaodong Gu, Masanori Nakahama, Satoshi Shinada, Fumio Koyama, "Surface grating VCSEL-integrated amplifier/beam scanner with high power and single mode operation", Applied Physics Express, Vol. 14, No. 6, p. 062005_1-5, May., 2021.

学会発表

Liang Dong, Xiaodong Gu, Mikito Yoshiki, Fumio Koyama, "Densely Integrated 1060nm 2D VCSEL Array for Space-division Multiplexing Toward Co-packaging Optics Transceivers", 10th IEEE CPMT Symposium Japan, ICSJ2021, Nov., 2021.
Ahmed Mohamed Ahmed Hassan, Xiaodong Gu, Masanori Nakahama, Satoshi Shinada, Mostafa Ahmed, Fumio Koyama, "4 W Single-Mode Operation of Surface Grating VCSELs", 2021 IEEE Photonics Conference, Oct., 2021.
Fumio Koyama, "VCSEL Photonics: Current State of the Art and Future Prospects", 27th International Semiconductor Laser Conference, ISLC2021, MP1.1 (legend), Oct., 2021.
Shanting Hu, Xiaodong Gu, Ahmed Mohamed Ahmed Hassan, Masanori Nakahama, Satoshi Shinada, Fumio Koyama, "Surface Grating Loaded VCSEL-integrated Amplifier/Beam Scanner with Single Mode Output Power of over 3W and Scan Resolution of over 200", WP2.2 (oral) Fig. 1 (a) Schematic structure, (b) Top view of a fabricated device; (c), 27th International Semiconductor Laser Conference, ISLC2021, WP2.2 (oral), Oct., 2021.
Suguru Yamaoka, Nikolaos-Panteleimon Diamantopoulos, Hidetaka Nishi, Takuro Fujii, Koji Takeda, Tatsurou Hiraki, Takuma Tsurugaya, Shigeru Kanazawa, Hiromasa Tanobe, Takaaki Kakitsuka, Tai Tuchizawa, Fumio Koyama, Shinji Matsuo, "100-GHz-class directly modulated membrane lasers on SiC substrate", 27th International Semiconductor Laser Conference, MP2.8 (invited), Oct., 2021.
Ruixiao Li, Xiaodong Gu, Satoshi Shinada, Fumio Koyama, "Ultra-compact VCSEL beam scanner with large field of view and its 2D beam scanning function", 27th International Semiconductor Laser Conference, Oct., 2021.
Hameeda Ibrahim, Ahmed Mohamed Ahmed Hassan, Xiaodong Gu, Satoshi Shinada, Moustafa Ahmed, Fumio Koyama, "Low power consumption 1060 nm single-mode intracavity metal aperture VCSEL with transverse resonance", 27th International Semiconductor Laser Conference, Oct., 2021.
Fumio Koyama, "Recent progress of VCSEL Photonics and their applications", 2021 European Conference on Optical Communication, We1D.1(Tutorial), Sep., 2021.
Xiaodong Gu, Satoshi Shinada, Fumio Koyama, "Compact 1D/2D VCSEL Beam Scanner with Enhanced Field of View and High Resolution", 2021 European Conference on Optical Communication, Th1D.3, Sep., 2021.
Hameeda Ibrahim, Ahmed Mohamed Ahmed Hassan, Xiaodong Gu, Satoshi Shinada, Moustafa Ahmed, Fumio Koyama, "1060nm Single-mode Metal-aperture VCSEL Array with Transverse Resonance and Low Power Consumption below 50 fJ/bit", 2021 European Conference on Optical Communication, Tu3D.5, Sep., 2021.
Shun Matsuo, Hiroyuki Uenohara, "Experimental Investigation of High-Frequency-Precision All-Optical Wavelength Conversion Using Four Wave Mixing, an Optical Comb and SSB Modulation", International Conference on Photonics in Switching and Computing 2021 (PSC2021), Sep., 2021.
Xiao Jie Ma, Tomoyuki Miyamoto, "Investigation of detection range of safety system for optical wireless power transmission based on depth camera", The 2021 IEICE Sosiety Conference, Sep., 2021.
Lingjian Meng, Tomoyuki Miyamoto, "Study on optical wireless communication applied to optical wireless power transmission", The 2021 IEICE Sosiety Conference, Sep., 2021.
Mingzhi Zhao, Tomoyuki Miyamoto, "Irradiation performances analysis of multi-LED optical wireless power transmission system based on collimation scheme", The 82nd Autumn Meeting of JSAP, Sep., 2021.
Xiao Jie Ma, Tomoyuki Miyamoto, "Safety system of optical wireless power transmission by suppressing light beam irradiation to human using depth camera", 25th Microoptics Conference (MOC2021), Sep., 2021.
Mingzhi Zhao, Tomoyuki Miyamoto, "High output and high efficiency handy-sized LED-array based optical wireless power transmission system using Fresnel lenses", 25th Microoptics Conference (MOC2021), Sep., 2021.
Ahmed Mohamed Ahmed Hassan, Xiaodong Gu, Masanori Nakahama, Moustafa Ahmed, Fumio Koyama, "Record High Power Single-Mode Operations of Surface Grating VCSELs", The 82nd JSAP Autumn Meeting, 2021, 10a-N405-7, Sep., 2021.
Fumio Koyama, "Transverse Coupled Cavity VCSEL Array for CPO Applications", OSA Photonics in Switching and Computing, W1A.1, Sep., 2021.
Shanting Hu, Xiaodong Gu, Ahmed Mohamed Ahmed Hassan, Masanori Nakahama, Satoshi Shinada, Fumio Koyama, "Surface Grating Loaded VCSEL-integrated Amplifier/Beam Scanner with Quasi-Single Mode Output Power of over 4W", 2021 IEICE Society Conference, C-3/4-43, Sep., 2021.
Hameeda Ibrahim, Ahmed Mohamed Ahmed Hassan, Xiaodong Gu, Satoshi Shinada, Moustafa Ahmed, Fumio Koyama, "Record Low Power Consumption 1060nm Single-mode Intracavity Metal Aperture VCSEL with Transverse Resonance", The 82nd JSAP Autumn Meeting, 2021, 10a-N405-9, Sep., 2021.
Liang Dong, Xiaodong Gu, Fumio Koyama, "Thermal Crosstalk Evaluation of Densely Packed 1.1 (マイクロ)m-band VCSEL Array for Multi-core Fiber Transmission", The 82nd JSAP Autumn Meeting, 2021, 10a-N405-8, Sep., 2021.
Ruixiao Li, Xiaodong Gu, Fumio Koyama, "Compact VCSEL beam scanner with large field of view and its 2D scanning function", The 82nd JSAP Autumn Meeting, 2021, 10a-N405-6, Sep., 2021.
Chang Ge, Fumio Koyama, "Modeling of Surface Grating-loaded VCSEL with Slowing Light", The 82nd JSAP Autumn Meeting, 2021, 10a-N405-5, Sep., 2021.
Chang Ge, Fumio Koyama, "Modeling of surface grating-loaded VCSEL with slowing light", 26th MICROOPTICS CONFERENCE, PO-45, Sep., 2021.
Liang Dong, Xiaodong Gu, Fumio Koyama, "Thermal crosstalk evaluation of 1.1 μm-band vertical cavity surface emitting laser array for multi core fiber transmission", 26th MICROOPTICS CONFERENCE, PO-34, Sep., 2021.
Hameeda Ibrahim, Ahmed Mohamed Ahmed Hassan, Moustafa Ahmed, Fumio Koyama, "Optical feedback tolerance of transverse coupled cavity VCSELs", 26th MICROOPTICS CONFERENCE, PO-33, Sep., 2021.
Kazuma Tanahashi, Ibuki Fujioka, Shanting Hu, Xiaodong Gu, Fumio Koyama, "Real-time LiDAR system using VCSEL-integrated amplifier/beam scanner", 26th MICROOPTICS CONFERENCE, B-2, Sep., 2021.
Tomoyuki Miyamoto, "Optical wireless power transmission for small equipment to mobility", XXXIV General Assembly and Scientific Symposium of URSI (URSI GASS 2021), Aug., 2021.
Shanting Hu, Xiaodong Gu, Ahmed Mohamed Ahmed Hassan, Masanori Nakahama, Satoshi Shinada, Fumio Koyama, "Record High PowerSingle-mode Operation and Beam Steering ofVCSEL-lntegrated Amplifier/Beam Scanner", Optical Fiber Communication Conference, M5A.3, Jun., 2021.
Fumio Koyama, "High-power VCSEL beam scanners for 3D sensing", 2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference, Jun., 2021.
Ruixiao Li, Zeuku Ho, Xiaodong Gu, Satoshi Shinada, Fumio Koyama, "Solid-state VCSEL beam scanner with ultra-large field of view and high resolution", Optical Fiber Communication Conference 2021(OFC2021 Virtual), W1D.3, Jun., 2021.
Hameeda Ibrahim, Ahmed Mohamed Ahmed Hassan, Xiaodong Gu, Satoshi Shinada, Moustafa Ahmed, Fumio Koyama, "1060nm single-mode metal aperture VCSEL array with transverse resonance for 5km single-mode fiber transmission", Optical Fiber Communication Conference 2021 (OFC2021 Vertual), Tu5C.1, Jun., 2021.
Shanting Hu, Xiaodong Gu, Ahmed Mohamed Ahmed Hassan, Masanori Nakahama, Satoshi Shinada, Fumio Koyama, "Steering of VCSEL-Integrated Amplifier/Beam Scanner", Optical Fiber Communication Conference 2021(OFC2021 Virtual), M5A.3, Jun., 2021.
Fumio Koyama, "VCSEL Photonics for Communications and Sensing", IEEE Electron Device Society Webinar, May., 2021.
Shanting Hu, Xiaodong Gu, Ahmed Mohamed Ahmed Hassan, Masanori Nakahama, Fumio Koyama, "Surface Grating VCSEL-Integrated Amplifier/Beam Scanner with High Power and Single Mode Operation", Conference on Lasers and Electro-Optics (CLEO2021), SM1H.8, May., 2021.
Hameeda Ibrahim, Ahmed Mohamed Ahmed Hassan, Moustafa Ahmed, Xiaodong Gu, Fumio Koyama, "50Gbps Single Mode 1060nm Intracavity Metal Aperture VCSEL With Transverse Resonance", Conference on Lasers and Electro-Optics(CLEO 2021 Virtual), SF2F.6, May., 2021.
Ahmed Mohamed Ahmed Hassan, Xiaodong Gu, Masanori Nakahama, Fumio Koyama, Satoshi Shinada, Moustafa Ahmed, "High power and high beam quality surface grating VCSEL", Conference on Lasers and Electro-Optics(CLEO2021 virtual), STh1G.5, May., 2021.

2020

論文

S. Yamaoka, N. Diamantopoulos, H. Nishi, R. Nakao, T. Fujii, K. Takeda, T. Hiraki, T. Tsurugaya, S. Kanazawa, T. Tanobe, T. Kakitsuka, T. Tsuchizawa, Fumio Koyama, Shinji Matsuo, "Directly-Modulated Membrane Lasers with 108GHz bandwidth on a high-conductivity Silicon Carbide Substrate", Naturae Photonics, Oct., 2020.
N. Diamantopoulos, H. Yamazaki, S. Yamaoka, M. Nagatani, H. Nishi, H. Tanobe, R. Nakao, T. Fujii, K. Takeda, T. Kakitsuka, H. Wakita, M. Ida, H. Nosaka, Fumio Koyama, Y. Miyamoto, Shinji Matsuo, ">100-GHz Bandwidth Directly-Modulated Lasers and Adaptive Entropy Loading for Energy-Efficient 300-Gbps IM/DD Systems", J. Lightwave Technol., vol. 38, no. 18, 26379, Sep., 2020.
Ahmed Mohamed Ahmed Hassan, Moustafa Ahmed Hafez, Masanori Nakahama, Fumio Koyama, "High-power, quasi-single-mode vertical-cavity surface-emitting laser with near-diffraction-limited and low-divergence beam", Japanese Journal of Applied Physics, vol. 59, no. 9, pp. 090904 -1-4, Aug., 2020.
Kouhei Shimosawa, Hiroyuki Uenohara, "Subchannel-Drop and Add Operation by Using Silicon Photonic All-Optical Orthogonal Frequency Division Multiplexing Demultiplexers", Optics letters, vol. 45, no. 14, pp. 3852-3855, Jul., 2020.
Takahiro Arai, Hiroyuki Uenohara, "Polarization-Diversity Silicon Photonic Mach–Zehnder Delay Interferometer for Optical Signal Processing Integrated with a Phase-Controllable Polarization Beam Splitter", IEICE Electronics Express, vol. 17, no. 12, Jun., 2020.
Shun Matsuo, Hiroyuki Uenohara, "Investigation of Pump Light Generation Methods and Precise All-Optical FWM Wavelength Conversion for Wavelength Defragmentation", IEICE Communications Express, Vol. 9, No. 8, pp. 383-388, Jun., 2020.
Shin Takano, Hiroyuki Uenohara, "Low-Complexity DBP using optical-field-Intensity Averaging for digital coherent system", IEICE Communications Express, Vol. 9, No. 8, pp. 394-399, Jun., 2020.

学会発表

Fumio Koyama, "New Function and Integration of VCSEL Photonics", The 6th Laser and Optoelectronics Conference, 2020.
Hameeda Ibrahim, Ahmed Mohamed Ahmed Hassan, Moustafa Ahmed, Fumio Koyama, "Single-mode and High-speed Intracavity Metal Aperture VCSEL with Transverse Coupled Cavity Effect", The 46th European Conference on Optical Communication, 2020.
Ruixiao Li, Zeuku Ho, Xiaodong Gu, Fumio Koyama, "Enhanced-Field-of-View Solid-State VCSEL Beam Scannerwith Lateral Resolution Points of More than 1200", The 46th European Conference on Optical Communication, 2020.
Jing Tang, Tomoyuki Miyamoto, "High functionality and high performance of indoor optical wireless power transmission system", OPJ2020, Nov., 2020.
Fumio Koyama, "VCSEL Photonics for Communications and Sensing", VSET Scientist Award Lecture, Webinar on Materials Science, Engineering and Technology, Nov., 2020.
Fumio Koyama, "40 Years Evolution of VCSEL", 25th Opto-Electronics and Communications Conference(OECC2020), Oct., 2020.
Fumio Koyama, "VCSEL Photonics for Communications and Sensing", 25th Opto-Electronics and Communications Conference(OECC2020), Oct., 2020.
Fumio Koyama, "High speed VCSEL photonics for datacenter/access networks", 25th Opto-Electronics and Communications Conference(OECC2020), Oct., 2020.
Zhou Killa, Tomoyuki Miyamoto, "LED-based portable optical wireless power transmission system for compact IoT with high performance", Oct., 2020.
Jing Tang, Tomoyuki Miyamoto, "Target recognition function and beam direction control based on deep learning and PID control for optical wireless power transmission system", IEEE 9th Global Conference on Consumer Electronics, Oct., 2020.
Fumio Koyama, "VCSEL Photonics for Communications and Sensing", Advanced Materials Lecture Series, International Association of Advanced Materials, Oct., 2020.
Jing Tang, Tomoyuki Miyamoto, "Design of OWPT system with beam direction control based on PID controller", Sep., 2020.
Jiaying Li, Tomoyuki Miyamoto, "Influence of waves on underwater optical wireless power transmission when light incident from underwater to air", Sep., 2020.
Yu Liu, Tomoyuki Miyamoto, "Analysis of Mie scattering characteristics for controlled appearance of OWPT system", Sep., 2020.
Shin Takano, Hiroyuki Uenohara, "Low Complexity Digital Backpropagation with Field Intensity Averaging for 10-channel-Nyquist-WDM 16QAM Signal", the 25rd Optolectronics and Communication Conference (OECC2020), Sep., 2020.
Tomoyuki Miyamoto, "Optical wireless power transmission for fixed equipment and mobility", (only publication of abstract), XXXIII General Assembly and Scientific Symposium of URSI, Aug., 2020.
Shanting Hu, Masashi Takanohashi, Xiaodong Gu, Keisuke Shimura, Fumio Koyama, "Solid-state beam scanner based on VCSEL integrated amplifier with scan resolution of over 200", 2020 Conference on Lasers and Electro-Optics, SM2M.2, May., 2020.
Fumio Koyama, "High power VCSEL amplifier for 3D sensing (STu4M.3)", 2020 Conference on Lasers and Electro-Optics (CLEO), May., 2020.
Ibuki Fujioka, Zeuku Ho, Xiaodong Gu, Fumio Koyama, "Solid state LiDAR with sensing distance of over 40m using a VCSEL beam scanner", 2020 Conference on Lasers and Electro-Optics, SM2M.4, May., 2020.

2019

論文

Hameeda Ibrahim, MS Alghamdi, A Bakry, Ahmed Mohamed Ahmed Hassan, Fumio Koyama, "Modelling and characterisation of the noise characteristics of the vertical cavity surface-emitting lasers subject to slow light feedback", Pramana, Volume 93, number 73, Aug., 2019.
Yuki Katsuta, Tomoyuki Miyamoto, "Design, simulation, and characterization of fly-eye lens system for optical wireless power transmission", Jpn. J. Appl. Phys., vol. 58, no. SJ, Jul., 2019.
Zhou Killa, Tomoyuki Miyamoto, "200mW-class LED based optical wireless power transmission for compact IoT", Jpn. J. Appl. Phys., vol. 58, no. SJ, Jul., 2019.
Taichi Shichijo, Tomoyuki Miyamoto, "Rate equation-based numerical analysis of mutual injection for phase locked 2D-VCSEL array using Talbot effect", Japanese Journal of Applied Physics, vol. 58, no. SJ, Jun., 2019.

学会発表

Yu Liu, Tomoyuki Miyamoto, "Application of scattering characteristics to module with filters on solar cell for improvement of OWPT equipment appearance", 24th Microoptics Conference, Nov., 2019.
Zhou Killa, Tomoyuki Miyamoto, "Optimized LED-based optical wireless power transmission system configuration for compact IoT", 24th Microoptics Conference, Nov., 2019.
Hameeda Ibrahim, Ahmed Mohamed Ahmed Hassan, Fumio Koyama, "High speed modulation single mode 850 nm DTCC-VCSEL", High speed modulation single mode 850 nm DTCC-VCSEL, G-2, Nov., 2019.
Jing Tang, Tomoyuki Miyamoto, "Numerical and experimental analysis of power generation characteristics in beam direction control of optical wireless power transmission with mirror", 24th Microoptics Conference, Nov., 2019.
Jiaying Li, Tomoyuki Miyamoto, "Light receiving characteristics from air to underwater optical wireless power transmission", 24th Microoptics Conference, Nov., 2019.
Yuki Katsuta, Tomoyuki Miyamoto, "Characterization and optimization of fly-eye lens system in optical wireless power transmission", 24th Microoptics Conference, Nov., 2019.
Fumio Koyama, ""[Invited Talk] VCSEL Photonics for Communications and 3D Sensing"", Nov., 2019.
Hiroki Ota, Toshihiro Asahi, Xiaodong Gu, Takahiro Sakaguchi, Fumio Koyama, "Integrated devices of MEMS VCSEL and DBR beam deflector", 24th MICROOPTICS CONFERENCE, E-4, Nov., 2019.
Ibuki Fujioka, Ruixiao Li, Zeuku Ho, Xiaodong Gu, Fumio Koyama, "Time of flight 3D imaging using VCSEL beam scanner", 24th MICROOPTICS CONFERENCE, E-3, Nov., 2019.
Ruixiao Li, Zeuku Ho, Xiaodong Gu, Fumio Koyama, "Wide-range Structured-Light Sensing Based on Non-mechanical VCSEL Beam Scanner", 24th MICROOPTICS CONFERENCE, Nov., 2019.
Jing Tang, Tomoyuki Miyamoto, "Numerical analysis of power generation characteristics in beam direction control of indoor optical wireless power transmission using mirror", The 80th Autumn Meeting of JSAP, Sep., 2019.
Yu Liu, Tomoyuki Miyamoto, "Improvement of appearance by scattering to color filters on solar cell for OWPT", The 80th Autumn Meeting of JSAP, Sep., 2019.
Fumio Koyama, "[Invited Talk] High power VCSEL photonics for LiDAR applications", IS-Auto Asia, Sep., 2019.
Fumio Koyama, ""[Plenary Talk] VCSEL Photonics for Communications and 3D Sensing"", Lasers, Optics and Photonics 2019, Sep., 2019.
Zhou Killa, Tomoyuki Miyamoto, "Optimization of LED-based Optical Wireless Power Transmission for Compact IoT", The 80th Autumn Meeting of JSAP, Sep., 2019.
Ahmed Mohamed Ahmed Hassan, Moustafa Ahmed, Masanori Nakahama, Fumio Koyama, "High power, high speed pulse generation of VCSEL amplifier", The 80th JSAP Autumn Meeting, 2019, 20a-E302-7, Sep., 2019.
Hameeda Ibrahim, Moustafa Ahmed, Fumio Koyama, "High-speed Double Transverse Coupled Cavity VCSELs", The 80th JSAP Autumn Meeting, 2019, 20a-E302-6, Sep., 2019.
Ruixiao Li, Zeuku Ho, Xiaodong Gu, Fumio Koyama, "Structured-light sensing based on non-mechanical VCSEL beam scanner for expanding the distance range", The 80th JSAP Autumn Meeting, 2019, 20a-E207-11, Sep., 2019.
Jiaying Li, Tomoyuki Miyamoto, "Light Receiving Characteristics in case of Air to Underwater Optical Wireless Power Transmission", The 80th Autumn Meeting of JSAP, Sep., 2019.
Fumio Koyama, "VCSEL photonics for communications and 3D sensing", The 11th International Conference on Information Opticds and Photonics, Aug., 2019.
Ruixiao Li, Zeuku Ho, Xiaodong Gu, Fumio Koyama, "Structured-Light Sensor Based on Non-mechanical VCSEL Beam Scanner", International Nano-Optoelectronics Workshop, Jul., 2019.
Masasi Yamazaki, Kazunori Seno, Toshikazu Hashimoto, Hiroyuki Uenohara, "Investigation of All-Optical Wavelength Conversion with 2-Stage-Comb-Generated Pump for High Frequency Resolution", International Conference on Photonics in Switching and Computing 2019 (PSC2019), Jul., 2019.
Fumio Koyama, "Beam Scanning VCSELs for 3D Optical Sensing", International Nano-optoelectronics Workshop 2019（iNOW), Jul., 2019.
Fumio Koyama, ""[Invited Talk] Photonics Advanced Technologies for Autonomous Car "", FIBER OPTICS EXPO 2019, Jul., 2019.
Shin Takano, Hiroyuki Uenohara, "Low Computational Complexity of Optical Nonlinear Compensation with Phase Linear Approximation Method for Single Polarization-64QAM Signals", the 24rd Optoelectronics and Communication Conference (OECC2019), Jul., 2019.
Shanting Hu, Masashi Takanohashi, Xiaodong Gu, Masanori Nakahama, Fumio Koyama, "Amplifier Integrated VCSEL with Wavelength Detuning Design", International Nano-Optoelectronics Workshop, Jul., 2019.
Fumio Koyama, "[Invited Talk] VCSEL-Based Beam Scanner for 3D Sensing", Optics and Lasers 2019, Jun., 2019.
Mizuki Morinaga, Xiaodong Gu, Keisuke Shimura, Akihiro Matsutani, Fumio Koyama, "Compact Dot Projector based on Folded Path VCSEL Amplifier for Structured Light Sensing", Conference on Lasers and Electro-Optics 2019, SM4N.4, May., 2019.
Shanting Hu, Masashi Takanohashi, Xiaodong Gu, Keisuke Shimura, Fumio Koyama, "Lateral Integration of VCSEL and Amplifier with Resonant Wavelength Detuning Design", Conference on Lasers and Electro-Optics 2019, SM4N.3, May., 2019.
Fumio Koyama, ""[Invited Talk] VCSEL Photonics for Communications and 3D Sensing"", Qingdao International Academic Forum, May., 2019.

その他

Tomoyuki Miyamoto, Noriyuki Yokouchi, Masaki Hirota, Takeo Maruyama, "Report on OPIC2019 the 1st Optical Wireless and Fiber Power Transmission Conference (OWPT2019)", vol. 47, no. 8, Aug., 2019.

2018

論文

Yuki Katsuta, Tomoyuki Miyamoto, "Design and experimental characterization of optical wireless power transmission using GaAs solar cell and series-connected high-power vertical cavity surface emitting laser array", Japanese Journal of Applied Physics, vol. 57, no. 8S2, Aug., 2018.
Masaki Mimura, Tomoyuki Miyamoto, "Thermal conductivity reduction effect of thin layer on thermal resistance of vertical cavity surface emitting lasers", Jpn. J. Appl. Phys., vol. 57, no. 8S2, Aug., 2018.
Shin Takano, Hiroyuki Uenohara, "Low complexity digital back propagation method using phase linear approximation for nonlinear distortion compensation for long haul transmission systems", IEICE Communication Express, vol. 7, no. 7, pp. 236-241, Jul., 2018.
Kohei Morita, Hiroyuki Uenohara, "Analytical and experimental investigation of a silicon photonic two-stage Mach-Zehnder delay interferometer-type polarization beam splitter", IEEE Photonics Journal, vol. 10, no. 3, Jun., 2018.

学会発表

Tomoyuki Miyamoto, "Optical Wireless Power Transmission (OWPT) for Automotive Industry", IWN2018, Rump Session 2, Nov., 2018.
Kazuhito Matsunaga, Tomoyuki Miyamoto, "Numerical analysis of light beam irradiation efficiency of optical wireless power transmission in a room", 23rd Microoptics Conference, Oct., 2018.
Taichi Shichijo, Tomoyuki Miyamoto, "Rate equation-based numerical analysis of 2D-array mutual injection for phase locked VCSEL array using Talbot effect", 23rd Microoptics Conference, Oct., 2018.
Tomoyuki Miyamoto, "Optical wireless power transmission - Can it be the next application of microoptics? -", 23rd Microoptics Conference, Oct., 2018.
Zhou Killa, Yuuji Isida, Tomoyuki Miyamoto, "Over 100mW class optical wireless power transmission for compact IoT", 23rd Microoptics Conference, Oct., 2018.
Ruixiao Li, Zeuku Ho, Xiaodong Gu, Fumio Koyama, "Structured-Light Sensor Based on Non-mechanical VCSEL beam scanner", 23rd Microoptics Conference, E-3, Oct., 2018.
Xiaodong Gu, Ryosuke Togashi, Takahiro Sakaguchi, Akihiro Matsutani, Fumio Koyama, "First Demonstration of C-band Wavelength Demultiplexer Based on a Bragg Reflector Waveguide Amplifier Using InP Material", Asia Communications and Photonics Conference 2018, Su4F.3, Oct., 2018.
Yuki Katsuta, Tomoyuki Miyamoto, "Design and measurement of fly-eye lens system for optical wireless power transmission", 23rd Microoptics Conference, Oct., 2018.
Zeuku Ho, Keisuke Shimura, Keisuke Kondo, Xiaodong Gu, Akihiro Matsutani, Fumio Koyama, "High Resolution Active Beam Scanner Based on VCSEL Amplifier", 31st Annual Conference of the IEEE Photonics Society, MC2.2, pp. 67-68, Oct., 2018.
Shanting Hu, Masashi Takanohashi, Xiaodong Gu, Masanori Nakahama, Fumio Koyama, "Amplifier Integrated VCSEL with Dielectric DBR and Wavelength Detuning Design for Unidirectional Coupling", IEICE Society Conference 2018, Sep., 2018.
Ruixiao Li, Zeuku Ho, Xiaodong Gu, Fumio Koyama, "Structured-Light Sensor Based on Non-mechanical VCSEL Beam Scanner", The 79th JSAP Autumn Meeting,, 19a-438-9, Sep., 2018.
Fumio Koyama, "VCSEL photonics for 3D sensing", Advanced Materials-2018, Sep., 2018.
Fumio Koyama, "High Power Slow Light VCSEL Amplifier for LiDAR Application", International Conference on Solid State Devices and Materials, Sep., 2018.
Tomoyuki Miyamoto, Yoshihisa Suda, "Simultaneous use of spontaneous emission light in VCSEL for improving efficiency of optical wireless power transmission", The 26th International Semiconductor Laser Conference, Sep., 2018.
Zhou Killa, Tomoyuki Miyamoto, Yuuji Isida, "Above 130mW class optical wireless power transmission for compact IoT", The 79th Autumn Meeting of JSAP, Sep., 2018.
Shunya Inoue, Shun Nishimura, Masanori Nakahama, Akihiro Matsutani, Fumio Koyama, "High Speed Wavelength Tuning of MEMS VCSEL with Advanced Voltage Drive Technique", 2018 International Semiconductor Laser Conference, TuP49, pp. 211-212, Sep., 2018.
Zeuku Ho, Junichiro Hayakawa, Keisuke Shimura, Keisuke Kondo, Xiaodong Gu, Akihiro Matsutani, Akemi Murakami, Fumio Koyama, "High Power and High Beam Quality VCSEL Amplifier", 2018 International Semiconductor Laser Conference, WC3, pp. 229-230, Sep., 2018.
Mizuki Morinaga, Xiaodong Gu, Keisuke Shimura, Masanori Nakahama, Akihiro Matsutani, Fumio Koyama, "VCSEL Amplifier Dot Projector with Folded-Path Slow-light Waveguide for 3D Depth Sensing", 2018 International Semiconductor Laser Conference, TuC4, pp. 95-96, Sep., 2018.
Fumio Koyama, "Advances of VCSEL Photonics", Samco Diode Laser Seminar, Aug., 2018.
Kenichi Iga, "Forty years of vertical-cavity surface-emitting laser: Invention and innovation", Japanese Journal of Applied Physics, Vol. 57, No. 8S2, pp. 1-7, Aug., 2018.
Tomohiro Naganuma, Hiroyuki Uenohara, "Analytical investigation of generic form expressing adaptive dispersion of optical fractional Fourier transform circuit", the 23rd Optoelectronics and Communication Conference (OECC2018), Jul., 2018.
Shin Takano, Hiroyuki Uenohara, "Low-complexity-nonlinear compensation method using phase linear approximation for 16QAM signals", the 23rd Optoelectronics and Communication Conference (OECC2018), Jul., 2018.
Fumio Koyama, "Advances in surface emitting lasers", The Third WRHI workshop on Asian Industry Highway, Jul., 2018.
Shanting Hu, Masashi Takanohashi, Xiaodong Gu, Masanori Nakahama, Fumio Koyama, "Lateral Integration of VCSEL and Amplifier with Dielectric DBR and Wavelength Detuning Design for Unidirectional Coupling", International Nano-Optoelectronics Workshop 2018, iNOW2018, pp. 102-103, Jul., 2018.
Keisuke Shimura, Masashi Takanohashi, Zeuku Ho, Xiaodong Gu, Masanori Nakahama, Akihiro Matsutani, Fumio Koyama, "Non-Mechanical Beam Scanner Integrated with Wavelength Detuned VCSEL for LiDAR Applications", International Nano-Optoelectronics Workshop 2018, iNOW2018, pp. 140-141, Jul., 2018.
Fumio Koyama, "VCSEL photonics for optical sensing", International Nano-Optoelectronics Workshop 2018, iNOW2018, pp. 42-43, Jul., 2018.
Kentoku Horikiri, Tomoyuki Miyamoto, "PL characterization of proton implantation quantum well intermixing of MOVPE grown QW at deep position for high eﬃciency VCSEL", 19th International Conference on Metalorganic Vapor Phase Epitaxy, Jun., 2018.
Tomoyuki Aoyama, Tomoyuki Miyamoto, "Material combination dependence of tunnel junction characteristics for improvement of electrical characteristics of VCSEL", 19th International Conference on Metalorganic Vapor Phase Epitaxy, Jun., 2018.
Keisuke Kondo, Xiaodong Gu, Zeuku Ho, Akihiro Matsutani, Fumio Koyama, "Two-Dimensional Beam Steering Using Slow-Light Waveguide Deflector Array with Optical Gain", Conference on Lasers and Electro-Optics 2018, SM31.4, May., 2018.
Mizuki Morinaga, Xiaodong Gu, Keisuke Shimura, Masanori Nakahama, Fumio Koyama, "VCSEL Amplifier with High Power and Narrow Divergence Applying a Folded Waveguide Layout", Conference on Lasers and Electro-Optics 2018, JTu2A.11, May., 2018.

2017

論文

Keisuke Kondo, Tomoki Tatebe, Shoji Hachuda, Hiroshi Abe, Fumio Koyama, Toshihiko Baba, "Fan-beam steering device using a photonic crystal slow-light waveguide with surface diffraction grating", Optics Letters, Vol. 42, No. 23, pp. 4990-4993, 2017.
Tomotaka Nagashima, Gabriella Cincotti, Takuya Murakawa, Satoshi Shimizu, Makoto Hasegawa, Kuninori Hattori, Masayuki Okuno, Shinji Mino, Akira Himeno, Naoya Wada, Hiroyuki Uenohara, Tsuyoshi Konishi, "Peak-to-average power ratio reduction of transmission signal of all-optical orthogonal time/frequency domain multiplexing using fractional Fourier transform", Optics Communications, Vol. 402, pp. 123-127, Jun., 2017.

学会発表

Fumio Koyama, "New Function and Integration of VCSEL Photonics", vol. 117, no. 358, pp. 47-52, 2017.
Shinsuke Miyajima, Kazuyoshi Nakada, Yuta Shiratori, Jinwoo Kim, Tomoyuki Miyamoto, Kunta Yoshikawa, Kenji Yamamoto, "(1ThPo.64)PERFORMANCE OF OPTICAL WIRELESS POWER TRANSFER SYSTEM", 27th International Photovoltaic Science and Engineering Conference (PVSEC-27), Nov., 2017.
Masaki Mimura, Tomoyuki Miyamoto, "Theoretical and experimental thermal resistance of VCSELs considering thermal conductivity reduction effect of thin layer", 22nd Microoptics Conference, Nov., 2017.
Yoshihisa Suda, Tomoyuki Miyamoto, "Simultaneous utilization of spontaneous emission and laser emission in VCSEL for efficiency improvement of optical wireless power transmission", 22nd Microoptics Conference, Nov., 2017.
Yuki Katsuta, Tomoyuki Miyamoto, "Efficiency improvement by serial-connection of VCSEL array for optical wireless power transmission", 22nd Microoptics Conference, Nov., 2017.
Fumio Koyama, "High Power VCSEL Amplifier For Laser Processing", The 12th Conference on Lasers and Electro-Optics Pacific Rim, 1-3G-1, Aug., 2017.
Hameeda Ibrahim, Fumio Koyama, Moustafa Ahmed, "Large Signal Modultion Analysis Of High-speed Transverse Coupled Cavity VCSELs", The 12th Conference on Lasers and Electro-Optics Pacific Rim, 1-4N-6, Aug., 2017.
Zeuku Ho, Keisuke Shimura, Xiaodong Gu, Masanori Nakahama, Akihiro Matsutani, Fumio Koyama, "High-resolution Beam Steering Of Slow Light VCSEL Amplifier", The 12th Conference on Lasers and Electro-Optics Pacific Rim, 2-1G-5, Aug., 2017.
Keisuke Shimura, Zeuku Ho, Masanori Nakahama, Xiaodong Gu, Akihiro Matsutani, Fumio Koyama, "Non-mechanical Beam Scanner Integrated VCSEL For Solid State LiDAR", The 12th Conference on Lasers and Electro-Optics Pacific Rim, 2-2G-3, Aug., 2017.
Masanori Nakahama, Shunya Inoue, Shun Nishimura, Akihiro Matsutani, Takahiro Sakaguchi, Fumio Koyama, "Sub-volt Wavelength Sweep Operation Of MEMS VCSEL Employing High-Q Mechanical Resonanc", The 12th Conference on Lasers and Electro-Optics Pacific Rim, 2-1N-5, Aug., 2017.
Fumio Koyama, "VCSEL Photonics For Non-mechanical LiDAR", The 12th Conference on Lasers and Electro-Optics Pacific Rim, Aug., 2017.
Shanting Hu, Akihiro Matsutani, Fumio Koyama, "Unidirectional Coupling Of Laterally Coupled VCSEL And Slow Light Modulator/Amplifier", The 12th Conference on Lasers and Electro-Optics Pacific Rim, P3-125, Aug., 2017.
Fumio Koyama, "VCSEL photonics for 3D imaging", International Nano-Optoelectronics Workshop 2017, SaB1, Aug., 2017.
Shanting Hu, Akihiro Matsutani, Fumio Koyama, "VCSELs Laterally Coupled with a Slow Light Modulator/Amplifier Showing Unidirectional Coupling", International Nano-Optoelectronics Workshop 2017, WeP, Aug., 2017.
Ibrahim Hameeda Ragab, Fumio Koyama, Moustafa Ahmed Hafez, "Large Signal Modulation Analysis of High-speed Double Transverse Coupled Cavity VCSELs", The 24th General Congress of the International Commission for Optics, Tu1J-06, Aug., 2017.
Ahmed Mohamed Ahmed Hassan, Moustafa Ahmed Hafez, Masanori Nakahama, Fumio Koyama, "Numerical analysis of Watt-class VCSEL amplifier", The 24th General Congress of the International Commission for Optics, P14-02, Aug., 2017.
Keisuke Kondo, Tomoki Tatebe, Xiaodong Gu, Fumio Koyama, Toshihiko Baba, "Photonic Crystal Slow-Light Beam Steering Device With Surface Diffraction Grating", The 24th General Congress of the International Commission for Optics, Tu2K-02, Aug., 2017.
Shanting Hu, Xiaodong Gu, Akihiro Matsutani, Fumio Koyama, "Electro-absorption Modulator Integrated with Transverse Coupled Cavity VCSELs", The 24th General Congress of the International Commission for Optics, Tu1J-05, Aug., 2017.
Zeuku Ho, Keisuke Shimura, Xiaodong Gu, Masanori Nakahama, Akihiro Matsutani, Fumio Koyama, "VCSEL Optical Amplifier for High Power Operations", The 24th General Congress of the International Commission for Optics, Tu1J-08, Aug., 2017.
Masasi Yamazaki, Hiroyuki Uenohara, "Analytical Investigation of All-Optical Wavelength Conversion Technique with 2-stage Optical Comb Generation for Wavelength Defragmentation", The24th Congress of the International Commission for Optics (ICO-24), Aug., 2017.
Yoshihisa Suda, Tomoyuki Miyamoto, "Simultaneous utilization of spontaneous emission and laser emission in VCSEL array for high-efficiency optical wireless power transmission", The 24th General Congress of International Commission for Optics, Aug., 2017.
Masaki Mimura, Tomoyuki Miyamoto, "Thermal resistance analysis of VCSELs considering thermal conductivity reduction effect of thin layer structure", The 24th General Congress of International Commission for Optics, Aug., 2017.
Kenichi Iga, Akinori Nishihara, "Invention of a Temperature-Insensitive Quartz Oscillation Plate, 1933", 2017 IEEE HISTory of ELectrotechnolgy CONference (HISTELCON), 2017 IEEE HISTory of ELectrotechnolgy CONference (HISTELCON), pp. 87-90, Aug., 2017.
Tomohiro Naganuma, Hiroyuki Uenohara, "Analytical Investigation of Adaptive Dispersion Control of an Optical Fractional OFDM Circuit with Phase Shift", Photonics in Switching 2017, Jul., 2017.
Yohei Aikawa, Hiroyuki Uenohara, "Experimental demonstration of optical comparison operation with 4-bit QPSK modulated signals for optical and electrical converted viterbi decoding,", 2017 INTERNATIONAL CONFERENCE ON PHOTONICS IN SWITCHING (PS), Jul., 2017.
Fumio Koyama, ""Emerging trends and challenges in high-speed and short-reach optical communications and interconnects"", Strategy Technology Workshop 2017, May., 2017.

2016

論文

Tomotaka Nagashima, Gabriella Cincotti, Takuya Murakawa, Satoshi Shimizu, Makoto Hasegawa, Kuninori Hattori, Masayuki Okuno, Shinji Mino, Akira Himeno, Naoya Wada, Hiroyuki Uenohara, Tsuyoshi Konishi, "Cost effective all-optical fractional OFDM receiver using an arrayed waveguide grating", Optical Fiber Technology,, vol. 32, pp. 119-122, 2016.
Tetsu Gi, Tomoyuki Miyamoto, "Shape control of AlGaAs selective oxidation by intermixing method", Japanese Journal of Applied Physics, vol. 55, no. 11, Sep., 2016.
Yohei Aikawa, Hiroyuki Uenohara, "Proposal and analytical investigation of optical comparator for optical and electrical converted Viterbi-decoding scheme", Electronics Letters, Asia Photonics and Communications Conference 2015, vol. 56, no. 16, pp. 1397-1398, Aug., 2016.
Shouhei Moriwaki, Minoru Saito, Tomoyuki Miyamoto, "Quantum well intermixing technique using proton implantation for carrier confinement of vertical-cavity surface-emitting lasers", Japanese Journal of Applied Physics, vol. 55, no. 8S3, Jul., 2016.

学会発表

Hameeda Ibrahim, Ahmed Mohamed Ahmed Hassan, Fumio Koyama, "Modulation Bandwidth Enhancement of Double Transverse Coupled Cavity VCSELs", ,MOC2016, 21st MICROOPTICS CONFERENCE, 13A-7, Oct., 2016.
Fumio Koyama, "VCSEL Photonics for Optical Interconnects", 21st MICROOPTICS CONFERENCE,MOC2016, 12C-3, Oct., 2016.
Yuki Komori, Tomoyuki Miyamoto, "Numerical analysis of effect of transverse mode of phase locked VCSEL array using Talbot effect", 21st Microoptics Conference (MOC2016), Oct., 2016.
Tetsu Gi, Tomoyuki Miyamoto, "Shape control of AlAs selective oxidation by intermixing of GaAs/AlAs hetero-interface", 21st Microoptics Conference (MOC2016), Oct., 2016.
Yohei Aikawa, Hiroyuki Uenohara, "Experimental demonstration of all-optical FEC coding scheme with convolutional code using single signal source", European Conference on Optical Communication, ECOC 2016, Sep., 2016.
Takashi Kondo, Junichiro Hayakawa, Naoki Jogan, Akemi Murakami, Jun Sakurai, Xiaodong Gu, Fumio Koyama, "Temperature Dependence of Small Signal Response of 850 nm Transverse-Coupled-", 25th International Semiconductor Laser Conference, ISLC 2016, TuD3, Sep., 2016.
Masanori Nakahama, Xiaodong Gu, Akihiro Matsutani, Takahiro Sakaguchi, Fumio Koyama, "VCSEL-Based High Resolution Wavelength Demultiplexer with Large Optical Gain", 25th International Semiconductor Laser Conference, ISLC 2016, TuD5, Sep., 2016.
Naoki Jogan, Junichiro Hayakawa, Takashi Kondo, Akemi Murakami, Jun Sakurai, Xiaodong Gu, Fumio Koyama, "Temperature Characteristics of Photo Detector Integrated Transverse-Coupled-Cavity VCSELs", 25th International Semiconductor Laser Conference, ISLC 2016, WE9, Sep., 2016.
Fumio Koyama, "High speed modulation of transverse coupled cavity VCSELs", 21st. Optoelectronics and Communications Conference (OECC/PS2016), MD2-1, Jul., 2016.
Shohei Oshida, Masashi Suhara, Tomoyuki Miyamoto, "Low thermal resistance VCSEL array adopted tunnel junction destruction using proton implantation", The 21st OptoElectronics and Communications Conference (OECC2016), Jul., 2016.
Yuki Komori, Tomoyuki Miyamoto, "Influence of wavelength deviation on phase locked VCSEL array using Talbot effect", The 21st OptoElectronics and Communications Conference (OECC2016), Jul., 2016.
Tomotaka Nagashima, Gabriella Cincotti, Takuya Murakawa, Satoshi Shimizu, Makoto Hasegawa, Kuninori Hattori, Masayuki Okuno, Shinji Mino, Akira Himeno, Naoya Wada, Hiroyuki Uenohara, Tsuyoshi Konishi, "Cost Effective Fractional OFDM Receiver Using arrayed waveguide grating", 21th Optoelectronics and Communication Conference and International Conference on Photonics in Switching 2016 (OECC/PS2016), Jul., 2016.
Hiroki Sasago, Hiroyuki Uenohara, "Investigation of Switch Reduction of a Multi-Dimensional Optical Node for Spatial Division Multiplexing Networks", 21th Optoelectronics and Communication Conference and International Conference on Photonics in Switching 2016 (OECC/PS2016), Jul., 2016.
Motoki Hiraoka, Tomotaka Nagashima, B. Karanov, Gabriella Cincotti, Satoshi Shimizu, Takuya Murakawa, Makoto Hasegawa, Kuninori Hattori, Masayuki Okuno, Shinji Mino, Akira Himeno, Naoya Wada, Hiroyuki Uenohara, Tsuyoshi Konishi, "Optical Serial-to-Parallel Conversion based on Fractional OFDM scheme", 21th Optoelectronics and Communication Conference and International Conference on Photonics in Switching 2016 (OECC/PS2016), Jul., 2016.
Cincotti Gabriella, Tsuyoshi Konishi, Takuya Murakawa, Tomotaka Nagashima, Satoshi Shimizu, Makoto Hasegawa, Kuninori Hattori, Masayuki Okuno, Shinji Mino, Akira Himeno, Naoya Wada, Hiroyuki Uenohara, "Time-frequency photonic signal processing", 21th Optoelectronics and Communication Conference and International Conference on Photonics in Switching 2016 (OECC/PS2016), Jul., 2016.
Kohei Morita, Hiroyuki Uenohara, "2-stage cascaded silicon photonic PBS based on Mach Zehnder delay interferometers", 21th Optoelectronics and Communication Conference and International Conference on Photonics in Switching 2016 (OECC/PS2016), Jul., 2016.
Shunya Inoue, Masanori Nakahama, Akihiro Matsutani, Takahiro Sakaguchi, Fumio Koyama, "Consideration and Fabrication of athermal HCG MEMS VCSEL", International Nano-Optolectronics Workshop, iNOW2016, Poster Session-7, Jul., 2016.
Xiaodong Gu, Masanori Nakahama, Akihiro Matsutani, Fumio Koyama, "VCSEL-Integrated Bragg Reflector Waveguide Amplifier with Single-mode Output Power over 10 mW", 21st. Optoelectronics and Communications Conference (OECC/PS2016), MD2-4, Jul., 2016.
Shunya Inoue, Masanori Nakahama, Akihiro Matsutani, Takahiro Sakaguchi, Fumio Koyama, "Fabrication of HCG MEMS VCSELs using nanoimprint lithography and consideration of athermal operation", 21st. Optoelectronics and Communications Conference (OECC/PS2016), MD2-3, Jul., 2016.
Yohei Aikawa, Hiroyuki Uenohara, "Experimental Demonstration of All-Optical FEC Coding Scheme with Convolutional Code", 21ST OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC) HELD JOINTLY WITH 2016 INTERNATIONAL CONFERENCE ON PHOTONICS IN SWITCHING (PS), Vol. 29, No. 1, pp. 165-168, Jul., 2016.
Minoru Saito, Shouhei Moriwaki, Tomoyuki Miyamoto, "Refractive index control by quantum well intermixing for light confinement in VCSEL", The 43th International Symposium on Compound Semiconductors (ISCS2016), Jun., 2016.
Masanori Nakahama, Xiaodong Gu, Akihiro Matsutani, Takahiro Sakaguchi, Fumio Koyama, "Slow Light VCSEL Amplifier for High-resolution Beam Steering and High-power Operations", Conference on Lasers and Electro-Optics 2016 (CLEO2016), SF1L.5, Jun., 2016.
Shanting Hu, Xiaodong Gu, Fumio Koyama, "Low chirp operation of transverse-coupled-cavity VCSELs", Conference on Lasers and Electro-Optics 2016 (CLEO2016), SF1L.4, Jun., 2016.

2015

論文

Hideaki Yamakawa, Takahiro Sakaguchi, Moustafa Ahmed, Ahmed Bakry, Fumio Koyama, "Spatial-mode multiplexer/demultiplexer based on tapered hollow waveguide with lateral optical confinement", Japanese Journal of Applied Physics, Vol. 54, pp. 120302-1-3, 2015.
Hideyuki Kusano, Yuki Yanagidate, Hiroyuki Uenohara, "Investigation of a Silicon Photonic Optical Serial-to-Parallel Converter with Mach-Zehnder Delay Interferometers and Integrated Ge-Photodetectors", IEEE Journal of Quantum Electronics, vol. 51, no. 8, Aug., 2015.
Masanori Nakahama, Xiaodong Gu, Takahiro Sakaguchi, Akihiro Matsutani, Moustafa Ahmed, Ahmed Bakry, Fumio Koyama, "Sub-gigahertz beam switching of vertical-cavity surface-emitting laser with transverse coupled cavity", Applied Physics Letters, Vol. 107, No. 7, pp. 071105-1-4, Aug., 2015.
Shanting Hu, Moustafa Ahmed, Ahmed Bakry, Fumio Koyama, "Low chirp and high-speed operation of transverse coupled cavity VCSEL", Japanese Journal of Applied Physics, vol. 54, no. 9, pp. 090304-1-4, Aug., 2015.
Xiaodong Gu, Masanori Nakahama, Akihiro Matsutani, Moustafa Ahmed, Ahmed Bakry, Fumio Koyama, "850nm transverse-coupled-cavity vertical-cavity surface-emitting laser with direct modulation bandwidth of over 30GHz", Applied Physics Express, vol. 8, no. 8, pp. 82702-1-4, Jul., 2015.
Moustafa Ahmed, Ahmed Bakry, Mohamed S. Alghamdi, Hamed Dalir, Fumio Koyama, "Enhancing the modulation bandwidth of VCSELs to the millimeter-waveband using strong transverse slow-light feedback", OPTICS EXPRESS, Vol. 23, No. 12, pp. 15365-15371, Jun., 2015.
Akihiro Matsutani, Fumio Koyama, "Dry etching of SiC using Ar/F2 plasma and XeF2 plasma", Japanese Journal of Applied Physics, vol. 54, p. 06GB01, May., 2015.

学会発表

Shanting Hu, Fumio Koyama, "High-speed and low chirp operations of transverse-coupled-cavity VCSELs", Technical Committee on Lasers and Quantum Electronics (LQE2015), Vol. 115, no. 378, pp. 5-8, 2015.
Yohei Aikawa, Hiroyuki Uenohara, "A proposal and analytical investigation of optical comparison-operation scheme for Viterbi decoding", Asia Communications and Photonics Conference, ACP 2015, Nov., 2015.
Shouhei Moriwaki, Minoru Saito, Syougo Kunisada, Tomoyuki Miyamoto, "Characterization of ion implantation quantum well intermixing for carrier confinement of VCSEL", 20th Microoptics Conference (MOC'15), Oct., 2015.
Masaki Hirota, Shiichi Iio, Ohta Yoshimi, Tomoyuki Miyamoto, "Wireless power transmission between a NIR VCSEL array and silicon solar cells", 20th Microoptics Conference (MOC'15), Oct., 2015.
Shunya Inoue, Akihiro Matsutani, Hideo Ohtsuki, Takahiro Miyashita, Fumio Koyama, "Dual beam single-mode vertical cavity surface emitting lasers using high-index contrast grating", 20th Microoptics Conference 2015, MOC 2015, B5, pp. 26-27, Oct., 2015.
Ibrahim Hameeda Ragab, Moustafa Ahmed, Fumio Koyama, "Influence of slow-light feedback on noise properties of VCSEL with a transverse coupled cavity", 20th Microoptics Conference 2015, MOC 2015, H3, pp. 26-28, Oct., 2015.
Shanting Hu, Fumio Koyama, "Coupled mode analysis of High-speed Transverse Coupled Cavity VCSEL", 20th Microoptics Conference 2015, MOC 2015, J5, pp. 26-29, Oct., 2015.
Masanori Nakahama, Xiaodong Gu, Takahiro Sakaguchi, Akihiro Matsutani, Fumio Koyama, "Sub-gigahertz beam switching with transverse-mode coupled cavity VCSELs", 20th Microoptics Conference 2015, J2, pp. 280-281, Oct., 2015.
Xiaodong Gu, Masanori Nakahama, Akihiro Matsutani, Fumio Koyama, "Over 30 GHz Modulation of 850 nm Transverse Coupled Cavity Vertical-Cavity Surface-Emitting Laser", 41st European Conference and Exhibition on Optical Communication, ECOC 2015, ID: 0803, Sep., 2015.
Xiaodong Gu, Masanori Nakahama, Akihiro Matsutani, Fumio Koyama, "First Demonstration of 850 nm Transverse Coupled Cavity Vertical Cavity Surface-Emitting Laser", The 76th JSAP Autumn Meeting 2015, 16a-2E-9, Sep., 2015.
Yohei Aikawa, Hiroyuki Uenohara, "Analytical Investigation of All-Optical FEC Coding Scheme with Convolutional Code", Photonics in Switching 2015, Sep., 2015.
Yohei Aikawa, Hiroyuki Uenohara, "Analytical Investigation of All-optical XOR Operation Based on FWM in HNLF with DPSK Modulated Signals", iNOW - International Nano-Optoelectronics Workshop Conference 2015, Aug., 2015.
Kenji Tanabe, Xiaodong Gu, Akihiro Matsutani, Fumio Koyama, "Vortex Beam Emitter Laterally Integrated with Vertical Cavity Surface Emitting Laser", The 11th Conference on Lasers and Electro-Optics Rim, 27J2-5, Aug., 2015.
Masanori Nakahama, Takahiro Sakaguchi, Akihiro Matsutani, Fumio Koyama, "Precise Wavelength Tuning of MEMS VCSELs enabling 110-ch Operations", The 11th Conference on Lasers and Electro-Optics Rim, 26J3-5, Aug., 2015.
Shanting Hu, Fumio Koyama, "Chirp Reduction and High-speed Operation Utilizing Lateral Optical Feedback of Coupled Cavity VCSEL", International Nano-Optoelectronics Workshop, Aug., 2015.
Masanori Nakahama, Xiaodong Gu, Takahiro Sakaguchi, Akihiro Matsutani, Fumio Koyama, "Transverse-mode Coupled cavity VCSELs with High Speed Beam Switching", International Nano-Optoelectronics Workshop, ThP1, pp. 119-120, Aug., 2015.
Shunya Inoue, Akihiro Matsutani, Hideo Ohtsuki, Takahiro Miyashita, Fumio Koyama, "Beam engineering of VCSELs using High-index Contrast sub-wavelength Grating", International Nano-Optoelectronics Workshop, ThP7, pp. 131-132, Aug., 2015.
Xiaodong Gu, Fumio Koyama, "60-channel Wavelength Selective Switch on Bragg Reflector Waveguides Array with 182 Output-ports", International Nano-Optoelectronics Workshop, ThP20, pp. 157-158, Aug., 2015.
Fumio Koyama, "Beam Engineering in VCSEL Photonics", International Nano-Optoelectronics Workshop, TuC1, pp. 30-31, Aug., 2015.
Ibrahim Hameeda R., Moustafa Ahmed, Fumio Koyama, "Modeling of Dynamics and Intensity Noise of Transverse Coupled Cavity VCSELs", International Nano-Optoelectronics Workshop, TuP15, pp. 60-61, Aug., 2015.
Shanting Hu, Fumio Koyama, "Chirp Reduction and Modulation Bandwidth Enhancement of Transverse Coupled Cavity VCSEL", The 20th Opto Electronics and Communications Conference, OECC2015, JWeC.14, Jul., 2015.
Masanori Nakahama, Hiroki Kobayashi, Takahiro Sakaguchi, Akihiro Matsutani, Fumio Koyama, "Transverse-mode Control of Transverse-coupled Cavity VCSELs using Vernier Effect for Boosting Single-mode Power", Compound Semiconductor Week 2015, CSW2015, Tu405.4, pp. 346-347, Jul., 2015.
Fumio Koyama, "Tunable Light Sources for Next Generation Access Networks", IEICE Technical Report, Technical Committee on Lasers and Quantum Electronics (LQE2015), Jun., 2015.
Moustafa Ahmed, Ahmed Bakry, Hamed Dalir, Fumio Koyama, "Application of Strong Slow-Light Feedback to Boost the Modulation Bandwidth of VCSELs Beyond 70 GHz", Conference on Lasers and Electro-Optics 2015, CLEO2015, SM3F.6, May., 2015.
Hamed Dalir, Fumio Koyama, "Millimeter-wave Modulation of 850 nm VCSELs for Radio over Fiber Applications", Conference on Lasers and Electro-Optics 2015, CLEO2015, SF1I.7, May., 2015.
Kenji Tanabe, Xiaodong Gu, Akihiro Matsutani, Fumio Koyama, "Compact Vortex Beam Emitter Laterally Integrated with VCSEL Array", Conference on Lasers and Electro-Optics 2015, CLEO2015, SW1F.2, May., 2015.
Hiroki Taniguchi, Hamed Dalir, Fumio Koyama, "High-speed Directly Modulated Laterally-coupled Twin Stripe Lasers for Optical Interconnects", Conference on Lasers and Electro-Optics 2015, CLEO2015, JTh2A.47, May., 2015.

2014

論文

Mikio Sorimachi, Tomoyuki Miyamoto, ""Control of carrier reserving and injection for high-speed semiconductor optical amplifier", JPN. J. APPL. PHYS., vol. 54, 2014.
Fumio Koyama, "Advances and New Functions of VCSEL Photonics", Optical Review, Vol. 21, No. 6, pp. 893-904, 2014.
Hamed Dalir, Fumio Koyama, "30GHz ultracompact electroabsorption modulator integrated with 980nm VCSEL with resonance effect in coupled cavities", Applied Physics Express(APEX), vol. 7, no. 11, pp. 112101-1-3, Oct., 2014.
Xiaodong Gu, Ayako Suzuki, Akihiro Matsutani, Fumio Koyama, "20μm long slow-light Bragg reflector waveguide modulator with over 20GHz modulation bandwidth", Applied Physics Express(APEX), vol. 7, no. 11, pp. 114101-1-4, Oct., 2014.
Hamed Dalir, Yuta Takahashi, Fumio Koyama, "Low-voltage, high-speed and compact electroabsorption modulator laterally integrated with 980-nm VCSEL", OPTICS EXPRESS(OPEX), vol. 22, no. 21, pp. 25746-25755, Oct., 2014.
Masanori Nakahama, Takahiro Sakaguchi, Akihiro Matsutani, Fumio Koyama, "Athermalization and on-chip multi-wavelength integration of VCSELs employing thermally actuated micromachined mirrors", Applied Physics Letters(APL), vol. 105, no. 091110 (2014), pp. 091110-1-4, Sep., 2014.
Hamed Dalir, Moustafa Ahmed, Ahmed Bakry, Fumio Koyama, "Compact electro-absorption modulator integrated with vertical-cavity surface-emitting laser for highly efficient millimeter-wave modulation", Applied Physics Letters(APL), vol. 105, no. 081113 (2014), pp. 081113-1-5 (2014), Aug., 2014.
Shunya Inoue, Junichi Kashino, Akihiro Matsutani, Hideo Ohtsuki, Takahiro Miyashita, Fumio Koyama, "Highly angular dependent high-contrast grating mirror and its application for transverse-mode control of VCSELs", Japanese Journal of Applied Physics(JJAP), vol. 53, no. 9, pp. 090306-1-4, Aug., 2014.
Masanori Nakahama, Takahiro Sakaguchi, Akihiro Matsutani, Fumio Koyama, "Athermal and widely tunable VCSEL with bimorph micromachined mirror", Optics Express, Vol. 22, no. 18, pp. 21471-21479, Aug., 2014.
Asako Kikuchi, Tomoyuki Miyamoto, "Reflectivity characteristics of high-contrast grating mirrors for a small-sized beam spot", JPN. J. APPL. PHYS., vol. 53, Jul., 2014.
Hamed Dalir, Fumio Koyama, "40 Gbps modulation of transverse coupled cavity VCSEL with push–pull modulation scheme", Applied Physics Express(APEX), vol. 7, pp. 092701-1-4, Jul., 2014.
Hiroyuki Uenohara, Kotaro Negishi, "Operational Performance of an Optical Serial-to-Parallel Converter Based on a Mach-Zehnder Delay Interferometer and a Phase-Shifted Preamble for DPSK-Formatted Signals", IEICE transaction on Electronics, vol. EC96, No. 7, pp. 1012-1018, Jul., 2014.

学会発表

Fumio Koyama, "Wavelength Engineering of MEMS VCSELs-Waveleng tuning, athermalization and new functions", International Conference on Small Science, ICSS 2014, JR-13, pp. 92-93, 2014.
Akihiro Matsutani, Fumio Koyama, "Microfabrication of 4H-SiC by Reactive Ion Etching Using XeF2 Plasma", 2014 International Symposium on Dry Process (DPS2014), Nov., 2014.
Akihiro Matsutani, Fumio Koyama, "Dry Etching of 4H-SiC using Ar/F2 Plasma", 27th International Microprocesses and Nanotechnology Conference, MNC2014, 6P-7-34, Nov., 2014.
Xiaodong Gu, Kenya Suzuki, Yuichiro Ikuma, Fumio Koyama, "Large Point-Count Wavelength Selective Switch Based on a Bragg Reflector Waveguides Array", Oct., 2014.
Xiaodong Gu, Ayako Suzuki, Akihiro Matsutani, Fumio Koyama, "Miniature Slow-Light Bragg Reflector Waveguide Modulator with over 20GHz Modulation Bandwidth", Oct., 2014.
Fumio Koyama, "VCSEL Photonics for High-Speed Optical Interconnects", The 4th Annual World Congress of Nano Science & Technology-2014, Nano-S&T2014, pp. 056, Oct., 2014.
Xiaodong Gu, Kenya Suzuki, Yuichiro Ikuma, Akihiro Matsutani, Fumio Koyama, "Improvement in Crosstalk of 200-Port Bragg Reflector Waveguides Array-based Wavelength Selective Switch", IEEE Photonics Conference, IPC2014, MB2.4, pp. 34-35, Oct., 2014.
Xiaodong Gu, Kenya Suzuki, Yuichiro Ikuma, Fumio Koyama, "60-Channels Flexible-Grid Wavelength Selective Switch Based on a Compact Bragg Reflector Waveguides Array", The 75th JSAP Autumn Meeting 2014, 19a-C7-10, Sep., 2014.
Hamed Dalir, Fumio Koyama, "Ultra-fast Compact Modulator-Integrated-VCSEL for Highly Efficient Millimeter-wave Modulation", The 75th JSAP Autumn Meeting 2014, 20p-C1-5, Sep., 2014.
Fumio Koyama, "Beam Steering, Beam Shaping and Intensity Modulation Based on Bragg Reflector (30min.)Waveguides", The 75th JSAP Autumn Meeting 2014, 20p-C1-6, Sep., 2014.
Hamed Dalir, Yuta Takahashi, Fumio Koyama, "Ultra-compact and High-bandwidth (>30GHz) Modulator Integrated VCSEL with Transverse-mode Beating", IEEE International Semiconductor Laser Conference, WB1, Sep., 2014.
Toshikazu Shimada, Hamed Dalir, Akihiro Matsutani, Fumio Koyama, "Beam scanner integrated VCSEL with electro-thermal wavelength tuning", IEEE International Semiconductor Laser Conference, WB3, Sep., 2014.
Masanori Nakahama, Takahiro Sakaguchi, Akihiro Matsutani, Fumio Koyama, "Athermal multi-wavelength VCSEL array employing thermally actuated micromachined mirrors", IEEE International Semiconductor Laser Conference, WB5, Sep., 2014.
Hamed Dalir, Yuta Takahashi, Fumio Koyama, "High-speed Compact Electro-absorption Modulator Laterally Integrated with VCSEL", European Conference on Optical Communications, ECOC 2014, Mo.4.4.6, pp. 1-3, Sep., 2014.
Xiaodong Gu, Kazunori Seno, Hiromasa Tanobe, Fumio Koyama, "60-channel Wavelength Selective Switch on Bragg Reflector Waveguides Array with 125 Output-ports", European Conference on Optical Communications, ECOC 2014, We.3.5.3, pp. 1-3, Sep., 2014.
Shunya Inoue, Fumio Koyama, "Highly angular dependent high contrast grating mirror for transverse mode control of VCSELs", iNOW2014, International Nano-Optoelectronics Workshop, PS2.05, pp. 120-121, Aug., 2014.
Fumio Koyama, Hamed Dalir, "High speed modulation and new functions of transverse coupled cavity VCSEL", iNOW2014, International Nano-Optoelectronics Workshop, FrA1, pp. 38-39, Aug., 2014.
Xiaodong Gu, Ayako Suzuki, Hamed Dalir, Akihiro Matsutani, Fumio Koyama, "Large Enhancement in Modulation Bandwidth of Low-Voltage Slow Light Bragg Reflector Waveguide Modulator", OECC 2014, OECC 2014, pp. 170-171, Jul., 2014.
Hamed Dalir, Fumio Koyama, "Highly Stable Operations of High Speed Transverse Coupled Cavity VCSELs", The OptoElectronics and Communication Conference 2014, OECC 2014, MO1D-3, pp. 35-36, Jul., 2014.
Masanori Nakahama, Takahiro Sakaguchi, Akihiro Matsutani, Fumio Koyama, "Athermal and Widely Tunable VCSEL with Bimorph Micromachined Mirror", OECC 2014, OECC 2014, vol. 22, no. 18, pp. 37-39, Jul., 2014.
Shunya Inoue, Fumio Koyama, "High-Contrast Grating Spatial Mode Filter for Widely Tunable Vertical Surface Emitting Laserfor", 19th Microoptics Conference, MOC2014, Jun., 2014.
Asako Kikuchi, Tomoyuki Miyamoto, "Study on Optical Confinement of Small Size VCSEL Using Index Change of QWI", The 19th Microoptics Conference, Jun., 2014.

その他

Hamed Dalir, Yuta Takahashi, Fumio Koyama, "Low Driving Voltage Electro-absorption Modulator Laterally Integrated with VCSEL", IEICE Technical Report, Jun., 2014.

2013

論文

Ayumi Fuchida, Akihiro Matsutani, Moustafa Ahmed, Ahmed Bakry, Fumio Koyama, "Low-polarization dependent thermo-optic phase-shift in slow light Bragg reflector waveguide for beam steering and optical switching", Jpn. J. Appl. Phys., vol. 53, no. 1, 010306-1-3, 2013.
Masanori Nakahama, Hayato Sano, Shunya Inoue, Takahiro Sakaguchi, Akihiro Matsutani, Moustafa Ahmed, Ahmed Bakry, Fumio Koyama, "Wavelength tuning and controlled temperature dependence in vertical-cavity surface-emitting lasers with a thermally and electrostatically actuated cantilever structure", Jpn. J. Appl. Phys., vol. 53, no. 1, pp. 010303-1-3, 2013.
Moustafa Ahmed, Ahmed Bakry, Reem Altuwirqi, Mohamed S. Alghamdi, Fumio Koyama, "Enhancing Modulation Bandwidth of Semiconductor Lasers beyond 50 GHz by Strong Optical Feedback for Use in Millimeter-Wave Radio over Fiber Links", Jpn.J.Appl.Phys, vol. 52, pp. 124103-1-5, 2013.
Hiroyuki Uenohara, Yohei Aikawa, "Bit Rate Adaptable Operation of a Hybrid Integrated Wavelength Converter using a Semiconductor Optical Amplifier Type Mach-Zehnder Interferometer", Optics Letters, vol. 38, no. 23, pp. 4982-4984, 2013.
Toshikazu Shimada, Akihiro Matsutani, Fumio Koyama, "Compact Slow-Light Electro-Absorption Modulator Laterally Integrated with 980nm Vertical-Cavity Surface-Emitting Laser", Applied Physics Express, APEX, no. 6, 122102-1-4, Nov., 2013.
Toshikazu Shimada, Akihiro Matsutani, Fumio Koyama, "Compact beam deflector based on slow-light Bragg reflector waveguide monolithically integrated with VCSEL", IEICE Electronics Express, vol. 10, no. 22, pp. 1-7, Nov., 2013.
Tomohiro Akutsu, Takuya Usio, Akihiro Matsutani, Tomoyuki Miyamoto, "Fabrication and characterization of VCSELs applying quantum well intermixing using spin-on-glass", Physica Status Solidi, vol. 10(c), no. 11, pp. 1452-1546, Nov., 2013.
Xiaodong Gu, Toshikazu Shimada, Akihiro Matsutani, Fumio Koyama, "Low polarization dependent beam deflector based on Bragg reflector waveguide for C-band wavelength demultiplexing", J.Appl.Phys, vol. 114, no. 16, 163106-1-4, Oct., 2013.
Kenichi Iga, "Vertical-Cavity Surface-Emitting Laser (VCSEL)", Proc. IEEE, invited paper, Vol. 101, No. 10, pp. 2229-2232, Oct., 2013.
M.Ahmed, A.Bakry, M.S. Alghamdi, Fumio Koyama, "Intensity noise in ultra-high frequency modulated semiconductor laser with strong feedback and its influence on noise figure of RoF links", J.Europ.Opt.Soc, JECS, 13064-1-6, Sep., 2013.
Xiaodong Gu, Toshikazu Shimada, Akihiro Matsutani, Fumio Koyama, "35-μm Bragg Reflector Waveguide Modulator for High-Speed and Energy-Saving Operation", IEEE Photonics Technology Letters, Vol. 25, no. 18, pp. 1766-1769, Sep., 2013.
Hamed Dalir, Fumio Koyama, "29GHz directly modulated 980nm vertical-cavity surface emitting lasers with bow-tie shape transverse coupled cavity", Appl. Phys. Lett., vol. 103, 091109-1-4, Aug., 2013.
Fumio Koyama, Xiaodong Gu, "Beam Steering, Beam Shaping, and Intensity Modulation Based on VCSEL Photonics", IEEE JOURNAL OF SELECTED TOPICS ON QUANTUM ELECTRONICS, vol. 19, no. 4, Jul., 2013.
Masanori Nakahama, Hayato Sano, Shunya Inoue, Takahiro Sakaguchi, Akihiro Matsutani, Fumio Koyama, "Tuning Characteristics of Monolithic MEMS VCSELs with Oxide Anti-reflection Layer", IEEE Photonics Technology letters, vol. 25, no. 18, pp. 1747-1750, Jul., 2013.

学会発表

Masanori Nakahama, Xiaodong Gu, Hirokazu Sumimoto, Fumio Koyama, "Beam-steering in Hollow Distributed Bragg Reflector Waveguides for RGB Imaging", The 20th international display workshops, PRJ2-4, 2013.
Tomoyuki Miyamoto, "Intermixing technologies for small VCSELs and fine oxidation structures", 2013 Asia Communications and Photonics Conference (ACP2013), Nov., 2013.
Masanori Nakahama, Hayato Sano, Shunya Inoue, Takahiro Sakaguchi, Akihiro Matsutani, Fumio Koyama, "Wavelength tuning and controlled temperature dependence of MEMS VCSELs with thermally and electrostatically actuated micromachined mirror", 18th Microoptics Conference (MOC’13), C3, Oct., 2013.
Xiaodong Gu, Kazunori Seno, Hiromasa Tanobe, Fumio Koyama, "Wavelength selective switch with high angular dispersion element based on Bragg reflector waveguide", 18th Microoptics Conference ,MOC'13, F2, Oct., 2013.
Hideaki Yamakawa, Masanori Sadamitsu, Takahiro Sakaguchi, Fumio Koyama, "Spatial mode multiplexer/demultiplexer based on tapered hollow waveguide with lateral optical confinement structure", 18th Microoptics Conference (MOC’13), H9, Oct., 2013.
Xiaodong Gu, Syouki Shimizu, Toshikazu Shimada, Akihiro Matsutani, Fumio Koyama, "High-speed and low-voltage operation of compact Bragg reflector waveguide modulator", 18th Microoptics Conference (MOC’13), C2, Oct., 2013.
Hamed Dalir, Fumio Koyama, "Modulation response enhancement of transverse-coupled cavity VCSELs for radio over fiber applications", 18th Microoptics Conference (MOC’13), C4, Oct., 2013.
Asako Kikuchi, Daisuke Nakagawa, Tomoyuki Miyamoto, "HCG reflectivity characteristics for a small-sized beam spot", 18th Microoptics Conference ,MOC’13, Oct., 2013.
Xiaodong Gu, Toshikazu Shimada, Akihiro Matsutani, Fumio Koyama, "Ultra-compact Bragg Reflector Waveguide Modulator with Large Response Bandwidth and Low Power Consumption", The 74th Autumn Meeting 201, 19a-P2-10, Sep., 2013.
Hamed Dalir, Akihiro Matsutani, Fumio Koyama, "Beyond 25GHz Directly Modulated 980nm VCSEL with Lateral Optical Feedback", The 74th Autumn Meeting 2013, 16p-D4-7, Sep., 2013.
Hamed Dalir, Akihiro Matsutani, Fumio Koyama, "Modulation Bandwidth Enhancement of Laterally-coupled Cavity VCSELs for Radio over Fiber Applications", The 74th Autumn Meeting 2019, 16p-A8-6, Sep., 2013.
Hideyuki Kusano, Hiroyuki Uenohara, "Silicon Photonic Optical Serial-to-Parallel Converter with Phase Operation", 39th European Conference on Optical Communication (ECOC2013), Sep., 2013.
Hamed Dalir, Akihiro Matsutani, Fumio Koyama, "Transverse Coupled Cavity VCSELs for Push-Pull Modulation", The 74th Autumn Meeting 2013, 16p-D4-8, Sep., 2013.
Xiaodong Gu, Akihiro Matsutani, Fumio Koyama, "1550nm-band Low Polarization Dependence Wavelength Demultiplexing Using Bragg Reflector Waveguide", The 74th Autumn Meeting 2013, 19a-P2-11, Sep., 2013.
Hamed Dalir, Fumio Koyama, "Modulation Bandwidth Enhancement of Quasi-single-mode Transverse Coupled Cavity VCSEL", IEEE Photonics Conference 2013(IPC2013), PD3, pp. 1-2, Sep., 2013.
Junichi Kashino, Shunya Inoue, Akihiro Matsutani, Hideo Ohtsuki, Takahiro Miyashita, Fumio Koyama, "Transverse Mode Control of VCSELs Using Angular Dependent High-contrast Grating Mirror", IEEE Photonics Conference 2013(IPC2013), TuE2.2, pp. 244-245, Sep., 2013.
Fumio Koyama, "Beam Steering and Intensity Modulation Based on VCSEL Photonics", 2013 International Nano-Optoelectronics Workshop, iNOW2013, Aug., 2013.
Hamed Dalir, Fumio Koyama, "Beyond 28.6GHz Directly Modulated 980nm VCSEL with Transverse Optical Feedback of Slow Light", Aug., 2013.
Xiaodong Gu, Toshikazu Shimada, Akihiro Matsutani, Fumio Koyama, "Super-high Resolution Beam Steering Using Bragg Reflector Waveguides", 2013 International Nano-Optoelectronics Workshop, iNOW2013, Aug., 2013.
Fumio Koyama, "Wavelength engineering of VCSELs based on MEMS technologies", IEEE Optical MEMS and Nanophotonics 2013, TM-S1.1, pp. 37-38, Aug., 2013.
Hiroyuki Uenohara, "Investigation of an Interleaver for All-Optical Analog-to-Digital Conversion", Photonics in Switching 2013, Jul., 2013.
Hiroyuki Uenohara, Yutaro Sano, Hideyuki Kusano, "40Gbps Operation of an Optical Serial-to-Parallel Converter for DPSK Signals with Phase Operation", Photonics in Switching 2013, Jul., 2013.
Hideyuki Kusano, Hiroyuki Uenohara, "Investigation of number of processing bit of a Si photonic optical serial-to-parallel converter with phase operation", Photonics in Switching 2013, Jul., 2013.
Fumio Koyama, Xiaodong Gu, "Super-high Resolution Optical Beam Steering Based on Bragg Reflector Waveguides", 2013 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR, MK2-3, Jul., 2013.
Hamed Dalir, Akihiro Matsutani, Fumio Koyama, "Modulation of Spatial Intensity Distribution of Laterally Coupled Twin VCSELs", 2013 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR, ThK3-2, Jul., 2013.
Hamed Dalir, Fumio Koyama, "Laterally-Coupled-Cavity VCSELs for Push-Pull High Speed Modulation", IEEE Summer Topicals 2013, MA4.3, Jul., 2013.
Masanori Nakahama, Hayato Sano, Shunya Inoue, Akihiro Matsutani, Takahiro Sakaguchi, Fumio Koyama, "Electro-thermally Tunable 850nm VCSELs with metal/semiconductor Thermally Actuated Mirror", 2013 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR, MK2-2, Jul., 2013.
Hideaki Yamakawa, Takahiro Sakaguchi, Fumio Koyama, "Wavelength Tuning of Hollow Waveguide DBR Lasers", 2013 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR, MK2-1, Jul., 2013.
Hamed Dalir, Fumio Koyama, "High-speed Direct Modulation Beyond 29GHz of 980nm Transverse Coupled Cavity VCSEL", 2013 Conference on Lasers and Electro-Optics Pacific Rim, CREO-PR, PD2-2, Jul., 2013.
Xiaodong Gu, Syouki Shimizu, Toshikazu Shimada, Akihiro Matsutani, Fumio Koyama, "Sub-1V and Sub-100μm Electro-absorption Modulator Based on Bragg Reflector Waveguide", 2013 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR, WK2-4, Jul., 2013.
Toshikazu Shimada, Akihiro Matsutani, Fumio Koyama, "Sub-50μm Long Slow-light Electro-absorption Modulator Laterally Integrated with VCSEL", 2013 Conference on Lasers and Electro-Optics Pacific Rim CLEO-PR, WK2-5, Jul., 2013.
Mikio Sorimachi, Hajime Iwasaki, Tomoyuki Miyamoto, "Theoretical investigation of high speed SOA using recombination-controlled carrier reservoir", The 18th OptoElectronics and Communications Conference (OECC2013), Jul., 2013.
Shota Mochizuki, Xiaodong Gu, Akihiro Matsutani, Fumio Koyama, "Creation of Vortex Beam based on Integrated Ring-shape Bragg Reflector Waveguide", CLEO 2013, Jun., 2013.
Xiaodong Gu, Kensuke Nakamura, Akihiro Matsutani, Fumio Koyama, "Miniature Bragg Reflector Waveguide Beam Deflector for Full C-band Wavelength Demultiplexing with Low Polarization Dependence and High Resolution", CLEO 2013, CTh4L.4, Jun., 2013.
Hamed Dalir, Fumio Koyama, "Push-Pull Modulation of Transverse Coupled-Cavity VCSELs", IEICE Technical Report, LQE/OPE2013, Jun., 2013.
Fumiya Hoshino, Toshihiro Furukawa, Tomoyuki Miyamoto, "Growth characteristics of GaInAs quantum dots on GaP substrate by MOCVD", The 40th International Symposium on Compound Semiconductors (ISCS2013), May., 2013.

2012

論文

Xiaodong Gu, Toshikazu Shimada, Akihiro Matsutani, Fumio Koyama, "Ultra-high channel-count wavelength demultiplexer based on a Bragg reflector waveguide with large angular dispersion", OPTICS EXPRESS, vol. 20, no. 26, B331-338, 2012.
Yusuke Naito, Satoshi Shimizu, Tomoyuki Kato, Kohroh Kobayashi, Hiroyuki Uenohara, "Investigation of all-optical latching operation of a monolithically integrated SOA-MZI with a feedback loop", Optics Express, Vol. 20, No. 26, pp. B339-B349, 2012.
Hayato Sano, Norihiko Nakata, Masanori Nakahama, Akihiro Matsutani, Fumio Koyama, "Athermal and tunable operations of 850nm vertical cavity surface emitting lasers with thermally actuated T-shape membrane structure", Appl. Phys. Lett., Vol. 101, No. 12, 121115, Oct., 2012.
Xiaodong Gu, Toshikazu Shimada, Akihiro Matsutani, Fumio Koyama, "Miniature Non-mechanical Beam Deflector Based on Bragg Reflector Waveguide with a Number of Resolution-points Larger than 1,000", IEEE Photon. J, Vol. 4, No. 5, pp. 1712-1719, Oct., 2012.
Satoshi Shimizu, Hiroyuki Uenohara, "All-optical signal regenerator for differential phase-shift keying format employing a differential encoding circuit with SOA-MZIs", IEEE J. QUANTUM. ELECT., vol. 48, No. 9, Sep., 2012.
Tomoyuki Miyamoto, Satoru Tanabe, Rei Nishio, Yoshitaka Kobayashi, Ryoichiro Suzuki, "InAs quantum dot growth on a thin GaNP buffer layer on GaP by metalorganic chemical vapor deposition", Jpn. J. Appl. Phys., vol. 51, no. 8, Aug., 2012.
Akihiro Matsutani, Yuuki Hashidume, Hideo Ohtsuki, Fumio Koyama, "Microfabrication of Si-Based High-Index-Contrast-Grating Structure by Thermal Nanoimprint Lithography and Cl2/Xe-Inductively Coupled Plasma Etching", Jpn. J. Appl. Phys., Vol. 51, 06FF05, Jun., 2012.
Satoshi Shimizu, Hiroyuki Uenohara, "Analytical Investigation of an All-Optical T-type Flip-Flop using an Semiconductor Optical Amplifier Mach-Zehnder Interferometer with Push-Pull Configuration", Japanese Journal of Applied Physics, vol. 50, no. 6, May., 2012.
You Nomiyama, Kohroh Kobayashi, Hiroyuki Uenohara, "Proposal for a Novel Bistable Device Using Two-mode Competition Between an In-plane Laser Diode and a Vertical-Cavity Surface Emitting Laser", Japanese Journal of Applied Physics, vol. 50, no. 12, May., 2012.

学会発表

Hayato Sano, Norihiko Nakata, Masanori Nakahama, Akihiro Matsutani, Fumio Koyama, "Athermal and Tunable VCSELs with a Thermally Actuated Cantilever Structure for WDM Optical Interconnects", IEEE CPMT Symposium Japan, ICSJ2012, 9-2, 2012.
Syouki Shimizu, Xiaodong Gu, Toshikazu Shimada, Akihiro Matsutani, Fumio Koyama, "Modeling and Experiment on Low Voltage Slow-Light Electro-absorption Modulators for High-speed and Low Power Consumption Optical Interconnect", IEEE CPMT Symposium Japan, ICSJ2012, 9-3, 2012.
Fumio Koyama, "Advances of VCSEL Photonics", 23rd IEEE International Semiconductor Laser Conference, ISLC2012, PLE3, Oct., 2012.
Xiaodong Gu, Toshikazu Shimada, Satoshi Shimizu, Akihiro Matsutani, Fumio Koyama, "Compact Bragg Reflector Waveguide Modulator Based on VCSEL Structure with Low Driving Voltage below 0.5 V", 23rd IEEE International Semiconductor Laser Conference, ISLC2012, TuP26, Oct., 2012.
Hamed Dalir, Fumio Koyama, "Proposal of In-plane to Vertical Optical Coupler Based on Tapered Hollow Waveguide", Frontiers in Optics 2012, FiO2012, FW5E.4, Oct., 2012.
Hideaki Yamakawa, Tomohiro Akutsu, Takahiro Sakaguchi, Fumio Koyama, "Hollow Waveguide DBR Lasers with Novel 2D Optical Confinement Toward Athermal and Narrow Linewidth Operations", 23rd IEEE International Semiconductor Laser Conference. ISLC2012, TuA7, pp. 48-49, Oct., 2012.
Yusuke Naito, Satoshi Shimizu, Tomoyuki Kato, Kohroh Kobayashi, Hiroyuki Uenohara, "All-Optical Latch and Gate Pulse Generation in All Monolithically Integrated SOA-MZI-Type Set/Reset Flip-Flop using Ultrashort Optical Pulses for 40Gbps Operation", 38th European Conference on Optical Communication (ECOC2012), Sep., 2012.
Xiaodong Gu, Toshikazu Shimada, Akihiro Matsutani, Fumio Koyama, "High-resolution Wavelength Demultiplexer Based on a Bragg Reflector Waveguide", The 73rd JSAP Autumn Meeting 2012, 13p-C5-10, Sep., 2012.
Xiaodong Gu, Toshikazu Shimada, Syouki Shimizu, Akihiro Matsutani, Fumio Koyama, "Compact Bragg Reflector Waveguide Modulator with Ultra-low Driving Voltage below 0.5 V", The 73rd JSAP Autumn Meeting 2012, 12a-PA3-25, Sep., 2012.
Ayumi Fuchida, Akihiro Matsutani, Fumio Koyama, "Giant Electro-thermal Phase-shift in Low-Polarization Dependent Slow Light Bragg Reflector Waveguide", IEEE PHOTONICS CONFERENCE 2012, IPC2012, ThZ5, Sep., 2012.
Hayato Sano, Norihiko Nakata, Masanori Nakahama, Akihiro Matsutani, Fumio Koyama, "Electro-Thermal Tuning of Athermal 850nm VCSELs with Thermally Actuated T-shape Membrane Structure", IEEE PHOTONICS CONFERENCE 2012, IPC2012, TuF4, Sep., 2012.
Toshikazu Shimada, Akihiro Matsutani, Fumio Koyama, "On-Chip Electro-Thermal Beam Steering based on Slow-light Bragg Reflector Waveguide Laterally Integrated with VCSEL", IEEE PHOTONICS CONFERENCE 2012, IPC2012, TuF2, Sep., 2012.
Xiaodong Gu, Toshikazu Shimada, Akihiro Matsutani, Fumio Koyama, "High-resolution Wavelength Demultiplexer Based on a Bragg Reflector Waveguide Amplifier with Large Angular Dispersion", 38th European Conference and Exhibition on Optical Communication, ECOC2012, Mo.2.E.4, Sep., 2012.
Fumio Koyama, "High-resolution Beam Steering from Bragg-reflector Waveguide", 2012 International Nano-Optoelectronics Workshop, iNOW 2012, Th3, Aug., 2012.
Masanori Nakahama, Xiaodong Gu, Toshikazu Shimada, Hayato Sano, Akihiro Matsutani, Fumio Koyama, "Lateral Integration of MEMS VCSEL and Slow Light Amplifier for High Single-mode Output Power", 2012 International Nano-Optoelectronics Workshop, iNOW 2012, 1-P9, Aug., 2012.
Hayato Sano, Norihiko Nakata, Masanori Nakahama, Akihiro Matsutani, Fumio Koyama, "Athermal Operation and Wavelength Tuning of VCSELs with Thermally Actuated MEMS Structure", 2012 International Nano-Optoelectronics Workshop, iNOW 2012, 2-P14, Aug., 2012.
Hamed Dalir, Fumio Koyama, "Electrical Transverse-Mode Switching of Laterally Coupled Cavity VCSELs", 2012 International Nano-Optoelectronics Workshop, iNOW 2012, 4-P4, Aug., 2012.
Xiaodong Gu, Toshikazu Shimada, Ayumi Fuchida, Akihiro Matsutani, Akihiro Imamura, Fumio Koyama, "Thermal and Electrical Beam Steering on a GaInAs/GaAs Slow-light Bragg Waveguide Amplifier", Conference on Lasers and Electro-Optics 2012, CLEO 2012, JW2A.90, May., 2012.
Masanori Nakahama, Xiaodong Gu, Toshikazu Shimada, Fumio Koyama, "Monolithic Beam Steering Device employing Slow-light Waveguide and Tunable MEMS VCSEL", Conference on Lasers and Electro-Optics 2012, CLEO 2012, JW2A.94, May., 2012.
Hayato Sano, Jyunichi Kashino, Adair Gerke, Akihiro Imamura, Fumio Koyama, Connie Chang-Hasnain, "Transverse Mode Control of VCSELs with High Contrast Sub-Wavelength Grating Functioning as Angular Filter", Conference on Lasers and Electro-Optics 2012, CLEO 2012, CW3N.5, May., 2012.
Yusuke Naito, Satoshi Shimizu, Noboru Fukui, Tomoyuki Kato, Kohroh Kobayashi, Hiroyuki Uenohara, "Set/Reset Operation of a Monolithically-Integrated InP SOA-MZI-type All-Optical Flip-Flop Circuit with a Feedback Loop", May., 2012.
Kohei Saito, Hiroyuki Uenohara, "Analytical Investigation of Possibility of a Phase Sensitive Amplifier Based on Four Wave Mixing in a Semiconductor Optical Amplifier", The 17th OptoElectronics and Communications Conference (OECC2012), May., 2012.
Yusuke Naito, Satoshi Shimizu, Noboru Fukui, Tomoyuki Kato, Kohroh Kobayashi, Hiroyuki Uenohara, "Experimental Demonstration of an Optical Packet Gatingusing a Monolithically-Integrated InP SOA-MZI-type All-Optical Flip-Flop Circuit with a Feedback Loop", The 17th OptoElectronics and Communications Conference (OECC2012), Busan, Korea,, May., 2012.
Kotaro Negishi, Hiroyuki Uenohara, "Investigation of Optical Label Recognition using Optical Serial-to-parallel Converter with Phase Operation for DPSK Signal", The 17th OptoElectronics and Communications Conference (OECC2012), May., 2012.
Hiroyuki Uenohara, Yohei Aikawa, "Hybrid Integrated Semiconductor Optical Amplifier-Mach Zehnder Interferometer (SOA-MZI)-type All-Optical Wavelength Converter with a Selectable Delay Time Push-Pull Configuration", The 17th OptoElectronics and Communications Conference (OECC2012), May., 2012.

2011

論文

Xiaodong Gu, Toshikazu Shimada, Fumio Koyama, "Giant and high-resolution beam steering using slow-light waveguide amplifier", Optics Express, Vol. 19, No. 23, 22675～22683, Nov., 2011.
Xiaodong Gu, Toshikazu Shimada, Ayumi Fuchida, Akihiro Matsutani, Akihiro Imamura, Fumio Koyama, "Beam steering in GalnAs/GaAs slow-light Bragg reflector waveguide amplifier", Appl. Phys. Lett., vol. 99, no. 21, pp. 211107-1-3, Nov., 2011.
Xiaodong Gu, Akihiro Imamura, Fumio Koyama, "Wavelength Trimming of Vertical-Cavity Surface-Emitting Lasers with High-Contrast Subwavelength Grating", Jpn. J. Appl. Phys., vol. 50, 100207-1~3, Oct., 2011.
Unknown Unknown, Mikio Sorimachi, Takuya Nishinome, Tomoyuki Miyamoto, "Well-in-well structure for high speed carrier relaxation into quantum well", Jpn. J. Appl. Phys., vol. 50, no. 8, Aug., 2011.
Yasutaka Higa, Hiroshi Nakajima, Mikio Sorimachi, Tomoyuki Miyamoto, "Large kink characteristics in light output of tunnel injection quantum well lasers", Jpn. J. Appl. Phys., vol. 50, no. 8, Aug., 2011.
Yohei Aikawa, Satoshi Shimizu, Hiroyuki Uenohara, "Demonstration of All-Optical Divider Circuit using SOA-MZI-type XOR Gate and Feedback Loop for Forward Error Detection", Journal of Lightwave Technology, vol. 29, no. 15, pp. 2259-2266, Aug., 2011.
Akihiro Imamura, Akihiro Matsutani, Fumio Koyama, "Multiplexing of Multi-Wavelength 1060-nm-Band GaInAs/GaAs Vertical Cavity Surface Emitting Laser Array Using Tapered Hollow Waveguide", Appl. Phys. Exp., vol. 4, 082106-1-3, Jul., 2011.
Hamed Dalir, Fumio Koyama, "Bandwidth enhancement of single-mode VCSEL with lateral optical feedback of slow light", IEICE Electronics Express, vol. 8, no. 13, pp. 1075-1081, Jul., 2011.
Ayumi Fuchida, Akihiro Matsutani, Fumio Koyama, "Slow-light total-internal-reflection switch with bending angle of 30 deg", Optics Letters, vol. 36, no. 14, pp. 2644-2646, Jul., 2011.
Akihiro Matsutani, Hideo Ohtsuki, Fumio Koyama, "Inductively Coupled Plasma Etching of Silicon Using Solid Iodine as an Etching Gas Source", Japanese Journal of Applied Physics, Vol. 50, 06GG07, Jun., 2011.
Hamed Dalir, Yasushi Yokota, Fumio Koyama, "Spatial Mode Multiplexer/Demultiplexer Based on Tapered Hollow Waveguide", IEICE Electronics Express, 2011XCL6281, May., 2011.

学会発表

Fumio Koyama, "VCSEL-based Photonic Integration", Global COE International Symposium, 2011.
Yasumitsu Miyake, Ayumi Fuchida, Fumio Koyama, "SLOW LIGHT AMPLIFIER WITH HIGHLY ANGULAR DEPENDENT HCG MIRROR", 17th Microoptics Conference, MOC'11, H-25, Nov., 2011.
Fumio Koyama, "ADVANCES OF VCSEL PHOTONICS", 17th Microoptics Conference, MOC'11, A-3, Nov., 2011.
Jyunichi Kashino, Akihiro Imamura, Fumio Koyama, "TRANSVERSE MODE CONTROL OF VCSELS USING HIGHLY ANGULAR DEPENDENT HIGH CONTRAST SUB-WAVELENGTH GRATING", 17th Microoptics Conference, MOC'11, H-24, Nov., 2011.
Mikio Sorimachi, Unknown Unknown, Takuya Nishinome, Hajime Iwasaki, Tomoyuki Miyamoto, "Numerical analysis of gain saturation characteristics of semiconductor optical amplifier using tunnel injection structure", 17th Microoptics Conference (MOC2011), Nov., 2011.
Daisuke Nakagawa, Yusuke Mikoshiba, Tomoyuki Miyamoto, "Reflectivity characteristics of high refractive index contrast sub-wavelength grating mirror without low index spacer layer", 17th Microoptics Conference (MOC2011), Nov., 2011.
Masanori Nakahama, Toshikazu Shimada, Fumio Koyama, "LATERAL INTEGRATION OF MEMS VCSEL AND SLOW LIGHT AMPLIFIER", 17th Microoptics Conference, MOC'11, C-5, Oct., 2011.
Akihiro Matsutani, Yuuki Hashidume, Hideo Ohtsuki, Fumio Koyama, "Si based High-index-contrast-grating Structure fabricated by High Temperature Cl2 Inductively Coupled Plasma Etching using Thermal Nanoimprint Resist Mask", 24th International Microprocesses and Nanotechnology Conference, MNC2011, 26P-7-59, Oct., 2011.
Toshikazu Shimada, Fumio Koyama, "SLOW LIGHT AMPLIFIER LATERALLY INTEGRATED WITH VCSEL", 17th Microoptics Conference, MOC'11, C-6, Oct., 2011.
Xiaodong Gu, Toshikazu Shimada, Ayumi Fuchida, Akihiro Imamura, Akihiro Matsutani, Fumio Koyama, "EXPERIMENTAL DEMONSTRATION OF BEAM-STEERING BASED ON SLOW-LIGHT WAVEGUIDE AMPLIFIER", 17th Microoptics Conference, MOC'11, C-3, Oct., 2011.
Unknown Unknown, Mikio Sorimachi, Takuya Nishinome, Hajime Iwasaki, Akihiro Matsutani, Tomoyuki Miyamoto, "The Reduction of Dumping Factor at Well-in-Well Quantum Well Lasers", IEEE PHOTONICS 2011, IEEE PHOTONICS 2011, pp. 680-681, Oct., 2011.
Ayumi Fuchida, Akihiro Matsutani, Fumio Koyama, "Miniature Slow Light Total-Internal-Reflection Switch with Carrier Injection", IEEE PHOTONICS 2011, MJ5, pp. 79-80, Oct., 2011.
Masanori Nakahama, Norihiko Nakata, Hayato Sano, Akihiro Matsutani, Fumio Koyama, "Giant Wavelength-temperature Dependence and Electro-thermal Tuning of MEMS VCSEL", IEEE PHOTONICS 2011, ThDD2, pp. 913-914, Oct., 2011.
Xiaodong Gu, Toshikazu Shimada, Fumio Koyama, "Proposal of Beam-deflector based on Slow Light Amplifier", The 2011 IEICE Society Conference, C-3-5, Sep., 2011.
Akihiro Imamura, Weijian Yang, Xiaodong Gu, Fumio Koyama, Connie J. Chang-Hasnain, "Transverse Mode Demultiplexing Based on HCG Hollow Waveguide", The 2011 IEICE Society Conference, C-3-17, Sep., 2011.
Unknown Unknown, Mikio Sorimachi, Takuya Nishinome, Tomoyuki Miyamoto, "Control of carrier relaxation for suppression of optical gain damping by using Well-in-Well structure", 12th International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD2012), Sep., 2011.
Toshikazu Shimada, Ayumi Fuchida, Fumio Koyama, "Lateral Integration of VCSEL and Slow Light Modulator", 37TH EUROPEAN CONFERENCE AND EXHIBITION ON OPTICAL COMMUNICATION,ECOC2011, We.10.P1.36, pp. 1-3, Sep., 2011.
Xiaodong Gu, Toshikazu Shimada, Fumio Koyama, "Giant and High-resolution Beam-steering from Slow Light Amplifier with Bragg Reflector Waveguide", IQEC/CLEO Pacific Rim 2011, 834, pp. 336-338, Aug., 2011.
Satoshi Shimizu, Hiroyuki Uenohara, "Analytical Investigation of an All-Optical T-type Flip-Flop using an SOA-MZI with Push-Pull Configuration for DPSK encoding", Photonics in Switching 2010, Jul., 2011.
Fumio Koyama, "Recent Advances in VCSEL Photonics", The 16th Opto-Electronics and Communications Conference, OECC2011, 7D4_1, Jul., 2011.
Toshikazu Shimada, Fumio Koyama, "Lateral Integration of VCSEL and Slow Light Amplifier", The 16th Opto-Electronics And Communications Conference, OECC2011, 6D2_3, Jul., 2011.
Xiaodong Gu, Toshikazu Shimada, Fumio Koyama, "Proposal of Beam Steering on Slow-light Waveguide Amplifier", The 16th Opto-Electronics And Communications Conference, OECC2011, 6D2_4, Jul., 2011.
Akihiro Imamura, Weijian Yang, James Ferrara, Yuuki Hasidume, Xiaodong Gu, Fumio Koyama, Connie J. Chang-Hasnain, "Spatial Mode Demultiplexer Based on High Contrast Sub-Wavelength Grating Hollow Waveguide", The 16th Opto-Electronics And Communications Conference, OECC2011, 6E1_4, Jul., 2011.
Hamed Dalir, Yasushi Yokota, Fumio Koyama, "Spatial Mode Multiplexer/Demultiplexer Based on Tapered Hollow Waveguide", The 16th Opto-Electronics And Communications Conference, OECC2011, 7E2_2, Jul., 2011.
Fumio Koyama, "New Functions and Integration of VCSEL-based Slow Light Devices", International Nano-Optoelectronics Workshop, iNOW2011, MoB2, Jul., 2011.
Akihiro Matsutani, Hayato Sano, Norihiko Nakata, Masanori Nakahama, Akihiro Matsutani, Fumio Koyama, "Athermal Operations and Giant Temperature Dependence of Micromachined VCSELs", International Nano-Optoelectronics Workshop, iNOW2011, P9, Jul., 2011.
Toshikazu Shimada, Fumio Koyama, "Lateral Integration of VCSEL with Slow Light Modulator", International Nano-Optoelectronics Workshop, iNOW2011, P10, Jul., 2011.
Hamed Dalir, Fumio Koyama, "Enhanced modulation bandwidth of VCSELs with lateral optical feedback beyond the frequency of relaxation oscillations", International Nano-Optoelectronics Workshop, iNOW2011, P3, Jul., 2011.
Takuya Nishinome, Unknown Unknown, Mikio Sorimachi, Tomoyuki Miyamoto, ""Fabrication and characterization of laser with WWell active layer for the carrier", 30th Electronic Materials Symposium (EMS2011), Jul., 2011.
Unknown Unknown, Mikio Sorimachi, Takuya Nishinome, Tomoyuki Miyamoto, ""Well-in-Well Quantum Structure for High Speed LO-Phonon Carrier Scattering", 30th Electronic Materials Symposium (EMS2011), Jul., 2011.
Hiroshi Takanashi, Tomoyuki Kato, Akihiro Matsutani, Takahiro Sakaguchi, Kohroh Kobayashi, Hiroyuki Uenohara, "Investigation of Optimized Condition of a Passively Mode-Locked VCSEL with Double-Path Resonance Configuration", 16th Opto-Electronics and Communications Conference (OECC2011),, pp. 269-270, Jul., 2011.
Ayumi Fuchida, Akihiro Matsutani, Fumio Koyama, "Reflection-type Slow Light Optical Switches Using Current Injection", Conference on Lasers and Electro-Optics, CLEO2011, JTuI3, May., 2011.
Masanori Nakahama, Hayato Sano, Norihiko Nakata, Akihiro Matsutani, Fumio Koyama, "Giant Wavelength-Temperature Dependence of VCSEL with Thermally Actuated Cantilever Structure", Conference on Lasers and Electro-Optics, CLEO2011, CMI7, May., 2011.
Hideaki Yamakawa, Naomi Tadokoro, Takahiro Sakaguchi, Yoshihisa Tokunaga, Fumio Koyama, "Athermal Hollow Waveguide Distributed Bragg Reflector Laser", Conference on Lasers and Electro-Optics, CLEO2011, CMI6, May., 2011.
Hayato Sano, Norihiko Nakata, Masanori Nakahama, Akihiro Matsutani, Fumio Koyama, "Wavelength Tuning and Athermal Operations of Micro-machined VCSELs for Uncooled WDM", Conference on Lasers and Electro-Optics, CLEO2011, CMI4, May., 2011.

2010

論文

Takayoshi Mori, Hiroyuki Uenohara, Kohroh Kobayashi, "Investigation of Improvement of Dynamic Switching Operation for Wavelength Switch with Super-Structure-Grating(SSG)-DBR-LD, Delayed-Interference Signal-Wavelength Converter(DISC), and Band Pass Filter", Journal of Lightwave Technology, Vol. 28, No. 23, pp. 3444-3453, 2010.
Kengo Sawada, Hiroyuki Uenohara, "High-Speed Optical Label Recognition Technique using an Optical Digital-to-Analog Conversion and Its Application to Optical Label Switch", Journal of Lightwave Technology, Vol. 28, No. 13, pp. 1889-1896, Jul., 2010.
Akihiro Matsutani, Hideo Ohtsuki, Fumio Koyama, "Reactive Ion Etching of Si Using Ar/F2 Plasma", Jpn. J. Appl. Phys., Vol. 49, 06GH05, Jun., 2010.
Satoshi Shimizu, Hiroyuki Uenohara, "A Proposal and Analytical Investigation of an All-Optical T-type Flip-Flop using SOA-MZI Configuration for DPSK Encoding Operation", Japanese Journal of Applied Physics, Vol. 49, No. 6, Jun., 2010.

学会発表

Toshikazu Shimada, Fumio Koyama, "Lateral Integration of VCSEL with Slow Light Amplifier/Modulator", IEEE Photonics Society 23rd Annual Meeting, IEEE2010, TuQ4, Nov., 2010.
Akihiro Matsutani, Hideo Ohtsuki, Fumio Koyama, "Dry Etching of Si by Solid Source I2 Inductively Coupled Plasma", 23rd International Microprocesses and Nanotechnology Conference,MNC2010, 11D-8-54, Nov., 2010.
Fumio Koyama, "Advances of VCSEL Photonics for Optical Interconnects", 10th IEEE International Conference on Solid-State and Integrated Circuit Technology, ICSICT2010, I08-15, Nov., 2010.
Ayumi Fuchida, Takeru Sakairi, Akihiro Matsutani, Fumio Koyama, "Characterizations of Reflection-type Slow Light Optical Switches", 16th MicroOptics Conference, MOC2010, TB6, Oct., 2010.
Ken Kirita, Takahiro Sakaguchi, Fumio Koyama, "Vertical Interconnections for Stacked Photonic Integrated Circuits with Multimode Interference Hollow Waveguide", 16th MicroOptics Conference, MOC2010, WC4, Oct., 2010.
Fumio Koyama, "Athermal Semiconductor Lasers based on VCSEL Technology", 16th MicroOptics Conference, MOC2010, TA2, Oct., 2010.
Hamed Dalir, Fumio Koyama, "Large signal modulation analysis of lateral-optical-feedback VCSELs", 16th MicroOptics Conference, MOC2010, MD1, Oct., 2010.
Xiaodong Gu, Akihiro Imamura, Fumio Koyama, "Grating Trimming of VCSEL with High Contrast sub-wavelength Grating", 16th MicroOptics Conference, MOC2010, TB5, Oct., 2010.
Go Yazawa, Satoshi Shimizu, Hiroyuki Uenohara, "Demonstration of optical packet switching with phase-shifted preamble-based optical serial-to-parallel conversion-type label processor", Sep., 2010.
Hamed Dalir, Fumio Koyama, "Proposal of laterally coupled VCSELs for modulation-bandwidth enhancement", The 71th Autumn Meeting of JSAP, 16p-H-5, Sep., 2010.
Hayato Sano, Norihiko Nakata, Akihiro Matsutani, Fumio Koyama, "Controlled temperature dependence of lasing wavelength of VCSELs with a thermally actuated cantilever", 2010 IEEE International Semiconductor Laser Conference, ISLC Kyoto, WC5, pp. 160-161, Sep., 2010.
Akihiro Imamura, Akihiro Matsutani, Fumio Koyama, "Multi-wavelength 1060nm-band VCSEL Array with Tapered Hollow Waveguide Multiplexer", 2010 IEEE International Semiconductor Laser Conference, ISLC Kyoto, MB3, pp. 7-8, Sep., 2010.
Hamed Dalir, Fumio Koyama, "Modulation bandwidth enhancement of VCSELs with lateral optical feedback of slow light", 2010 IEEE International Semiconductor Laser Conference, ISLC Kyoto, P10, pp. 83-84, Sep., 2010.
Akihiro Imamura, Akihiro Matsutani, Fumio Koyama, "Tapered hollow waveguide multiplexer for multi-wavelegth VCSEL array", 2010 International Nano-Optoelectronics Workshop, iNOW 2010, P11, pp. 170-171, Aug., 2010.
Hayato Sano, Norihiko Nakata, Akihiro Matsutani, Fumio Koyama, "Wavelength Control of VCSELs with a Thermally Actuated MEMS Structure", 2010 International Nano-Optoelectronics Workshop, iNOW 2010, P15, pp. 286-287, Aug., 2010.
Fumio Koyama, "VCSEL-based Slow Light Photonics", 2010 International Nano-Optoelectronics Workshop, iNOW 2010, MoA3, pp. 8-9, Aug., 2010.
Yohei Aikawa, Satoshi Shimizu, Hiroyuki Uenohara, "Investigation of all-optical division processing using a SOA-MZI-based XOR gate for all-optical FEC with cyclic code", Photonics in Switching 2010, Jul., 2010.
Fumio Koyama, "Advances of VCSEL Photonics", Laser Optics 2010, ThR3-25, Jul., 2010.
Fumio Koyama, "Wavelength Engineering of VCSELs", 15th OptoElectronics and Communications Conference, 9D2-2, pp. 834-835, Jul., 2010.
Ayumi Fuchida, Akihiro Matsutani, Fumio Koyama, "Compact Reflection-type Optical Switch with Slowing Light", 15th OptoElectronics and Communications Conference, 9D2-3, pp. 836-837, Jul., 2010.
Norihiko Nakata, Hayato Sano, Akihiro Matsutani, Fumio Koyama, "Proposal of Multi-Wavelength Integration of Athermal GAAS VCSEL Array with Thermally Actuated Cantilever Structure", International Conference on Indium Phosphide and Related Materials, WeP35, pp. 299-302, Jun., 2010.
Hayato Sano, Norihiko Nakata, Akihiro Matsutani, Fumio Koyama, "Wavelength Trimming of MEMS VCSELs for Post-process Wavelength Allocation", International Conference on Indium Phosphide and Related Materials, ThA1-5, pp. 397-400, Jun., 2010.
Ayumi Fuchida, Bala Pesala, Vadim Karagodsky, Forrest G. Sedgwick, Fumio Koyama, Connie J. Chang-Hasnain, "Zero-Dispersion Slow Light in Hollow Waveguide with High-Contrast Grating", Laser Science to Photonic, CLEO/QELS:2010, CThW5, May., 2010.
Vadim Karagodsky, Bala Pesala, Christopher Chase, Werner Hofmann, Fumio Koyama, Connie J. Chang-Hasnain, "Multiwavelength High Contrast Grating VCSEL Array With 200nm Spectral Range", Laser Science to Photonic, CLEO/QELS:2010, CMO6, May., 2010.

2009

論文

Padullaparthi Babudayal, Takahiro Sakaguchi, Akihiro Matsutani, Fumio Koyama, "Multiple-Wavelength Vertical-Cavity Surface-Emitting Lasers by Grading a Spacer Layer for Short-Reach Wavelength Division Multiplexing Applications", Appl. Phys. Exp., vol. 2, no. 9, Aug., 2009.
Xiaoxue Zhao, Bo Zhang, Louis Christen, Devang Parekh, Werner Hofmann, Markus C. Amann, Fumio Koyama, Alan E. Willner, Connie J. Chang-Hasnain, "Greatly increased fiber transmission distance with an optically injection-locked vertical-cavity surface-emitting laser", OPTICS EXPRESS, vol. 17, no. 16, pp. 13785-13791, Aug., 2009.
Go Yazawa, Satoshi Shimizu, Hiroyuki Uenohara, "Analytical investigation of an optical serial-to-parallel converter with phase-shifted preamble and Mach-Zehnder delay interferometers", Japanese Journal of Applied Physics, Vol. 48, No. 7, p. 070210, Jul., 2009.
Tomoyuki Sengoku, Ryoichiro Suzuki, Kosuke Nemoto, Satoru Tanabe, Fumio Koyama, Tomoyuki Miyamoto, "Photoluminescence characteristics of InAs quantum dots with GaInP cover layer grown by metalorganic chemical vapor deposition", Jpn. J. Appl. Phys., vol. 48, no. 7R, pp. 070203-1-3, Jul., 2009.
Akihiro Matsutani, Hideo Ohtsuki, Fumio Koyama, "Smooth and Vertical Profile Dry Etching of Si Using XeF2 Plasma", Japanese Journal of Applied Physics, vol. 48, no. 6S, pp. 06FE09-1-3, Jun., 2009.
Hayato Sano, Akihiro Matsutani, Fumio Koyama, "Athermal 850nm Vertical Cavity Surface Emitting Lasers with Thermally Actuated Cantilever Structure", Appl. Phys. Exp, vol. 2, no. 7, pp. 072101-1-3, Jun., 2009.
Fumio Koyama, "VCSEL Photonics -advances and new challenges", IEICE ELEX, vol. 6, no. 11, pp. 651-672, Jun., 2009.
Hayato Sano, Fumio Koyama, "Proposal of gain-matched VCSELs with a thermally actuated MEMS structure for wide temperature operations", IEICE ELEX, vol. 6, no. 12, pp. 883-888, Jun., 2009.

学会発表

Fumio Koyama, "Wavelength Control of VCSELs", The XV International Workshop on the Physics of Semiconductor Devices, IWPSD 2009, pp. 77-80, 2009.
Fumio Koyama, "Advances of VCSEL-related Photonic Devices", 12th International Symposium on Microwave and Optical Technology, ISMOT 2009, I-605, pp. 999-1002, 2009.
Hiroyuki Uenohara, Kengo Sawada, Go Yazawa, Satoshi Shimizu, "40Gbps Operation of Autonomous Optical Label Processing and its Application to Optical Label Switching Systems", 4TH International Workshop on OPS and OCDMA(IWOO2009), Nov., 2009.
Akihiro Matsutani, Hideo Ohtsuki, Fumio Koyama, "Dry Etching of Si using Ar/F2 Plasma", 22nd International Microprocesses and Nanotechnology Conference, MNC2009, 18D-7-50, pp. 254-255, Nov., 2009.
Hayato Sano, Fumio Koyama, "Proposal of Gain-matched VCSELs with a Thermally Actuated Cantilever Structure for Ultra-wide Temperature Operations", 15th Microoptics Conference, MOC2009, K4, Oct., 2009.
Yusuke Mikoshiba, Tomoyuki Miyamoto, "Theoretical design of current injection type high-index contrast subwavelength grating mirror for VCSELs", 15th Microoptics Conference (MOC'09), Oct., 2009.
Fumio Koyama, "Advances of Surface Emitting Lasers", International Symposium of Advanced Photonic Electronics, JSPS2009, pp. 35-40, Oct., 2009.
Ken Kirita, Fumio Koyama, "Vertical MMI Coupler for 3D Photonic Integrated Circuits", The 22nd Annual Meeting of the IEEE Photonics Society, WL2, pp. 477-478, Oct., 2009.
Akihiro Imamura, Vadim Karagodsky, Bala Pesala, Fumio Koyama, Connie J. Chang-Hasnain, "Multi-Wavelength VCSEL Array based on High Contrast Sub-Wavelength Grating", The 22nd Annual Meeting of the IEEE Photonics Society, ThX5, pp. 811-812, Oct., 2009.
Kengo Sawada, Hiroyuki Uenohara, "40Gbps, 3-bit Operation of a Semiconductor Optical Digital-to-Analog Converter", 35th European Conference on Optical Communication (ECOC2009), Mon.1.2.4, Sep., 2009.
Takayoshi Mori, Hiroyuki Uenohara, Kohroh Kobayashi, "Improvement of Wavelength Switch Performance Consisting of a SSG-DBR-LD and a SOA-DISC with BPF Detuning", 35th European Conference on Optical Communication (ECOC2009), P3.03, Sep., 2009.
Satoshi Shimizu, Hiroyuki Uenohara, "A Proposal and Analytical Investigation of All-Optical T-type Flip-Flop using SOAs", Photonics in Switching 2009, PT-8, Sep., 2009.
Hayato Sano, Akihiro Matsutani, Fumio Koyama, "Athermal and Tunable Operations of 850nm VCSEL with Thermally Actuated Cantilever Structure", ECOC 2009, P2.26, Sep., 2009.
Fumio Koyama, Hayato Sano, "VCSEL Photonics –Tuning, Athermalization and Slowing-down –", CLEO/Pacific Rim 2009, 978-1-4244-3830-3/09, Aug., 2009.
Akihiro Imamura, Akihiro Matsutani, Fumio Koyama, "Tapered hollow waveguide multiplexer for multi-wavelength VCSEL array", 2009 International Nano-Optoelectronics Workshop, iNOW2009, P7, Aug., 2009.
Ryoichiro Suzuki, Tomoyuki Miyamoto, Tomoyuki Sengoku, Kosuke Nemoto, Satoru Tanabe, Rei Nishio, Fumio Koyama, "InAs quantum dots on GaInNAs buffer layer", 36th International Symposium on Compound Semiconductors, pp. 133-134, Aug., 2009.
Ayumi Fuchida, Fumio Koyama, "Slow Light Optical Switch with Brag Reflector Waveguide", 2009 International Nano-Optoelectronics Workshop, iNOW2009, P29, pp. 177-178, Aug., 2009.
Fumio Koyama, "Manipulation of Light in VCSELs and Hollow Waveguides", 2009 International Nano-Optoelectronics Workshop, iNOW2009, ThA2, pp. 37-38, Aug., 2009.
Satoshi Shimizu, Hiroyuki Uenohara, "A Novel Modeling of Gain Profile of the MQW-SOAs", 14th Optoelectronics and Communications Conference (OECC2009), WO5, Jul., 2009.
Masatoshi Namiki, Hiroyuki Uenohara, Kohroh Kobayashi, "Improvement of Performance of a SOA based Delayed Interference Signal-wavelength Converter with MZDI Phase Offset and BPF Detuning", 14th Optoelectronics and Communications Conference (OECC2009), Jul., 2009.
Fumio Koyama, Hayato Sano, "Wavelength control of MEMS VCSELs", Opto-Electronics and Communications Conference 2009, OECC2009, FO3, Jul., 2009.
Hiroshi Takanashi, Tomoyuki Kato, Akihiro Matsutani, Takahiro Sakaguchi, Takashi Miyaguchi, Kohroh Kobayashi, "Actively mode-locked VCSEL module with double-path resonance configuration", OECC2009, Jul., 2009.
Fumio Koyama, "New Functions of VCSEL-related Photonic Devices", International Conference on Materials for Advanced Technologies, ICMAT2009, A02997, 05119, Jun., 2009.
Bala Pesala, Vadim Karagodsky, Connie Chang-Hasnain, Vadim Karagodsky, Fumio Koyama, Connie J. Chang-Hasnain, "Novel 2D High-Contrast Grating Hollow-Core Waveguide", Conference on Lasers and Electro-Optics, CLEO/IQEC2009, CMQ7, May., 2009.
Satoru Tanabe, Ryoichiro Suzuki, Tomoyuki Sengoku, Kosuke Nemoto, Tomoyuki Miyamoto, "InAs QDs on thin GaP_1-xN_x buffer on GaP by MOCVD", 2009 International Conference on Indium Phosphide and Related Materials (IPRM2009), May., 2009.

2008

論文

Fumio Koyama, "New Functions of VCSEL-based Optical Devices", Chinese Optics Letters, vol. 6, no. 10, Oct., 2008.
Xiaoxue Zhao, Koichi Hasebe, Takahiro Sakaguchi, Fumio Koyama, Connie J. Chang-Hasnain, Nobuhiko Nishiyama, Catherine Canueau, Chung-En Zah, "Tunable optical equalizer using diffraction grating filters", IEEE Photon. Technol. Lett, vol. 20, no. 18, pp. 1590, Sep., 2008.
Ryoichiro Suzuki, Tomoyuki Miyamoto, Tomoyuki Sengoku, Fumio Koyama, "High-density InAs quantum dots on GaNAs buffer layer", J. Crystal Growth, vol. 310, pp. 5085-5088, Aug., 2008.
Tomoyuki Miyamoto, Tomohiro Nishina, Yoshihiro Kashihara, Syutaro Ishida, Fumio Koyama, "Thermal resistance reduction of vertical-cavity surface-emitting lasers by thickness-modulated distributed Bragg reflector", Jpn. J. Appl. Phys., vol. 47, no. 8, pp. 6772-6776, Aug., 2008.
Yasutaka Higa, Tomoyuki Miyamoto, Hiroshi Nakajima, Kosuke Fujimoto, Fumio Koyama, "Theoretical design of carrier injection rate and recombination rate in tunnel injection quantum well lasers", Physica Status Solidi, vol. 5(c), no. 9, pp. 2838-2840, Jul., 2008.
Akihiro Imamura, Naoto Kitabayashi, Fumio Koyama, "Beam steering and tilt coupling in tunable hollow waveguide", IEICE Electronics Express, vol. 5, no. 11, pp. .405-410, Jun., 2008.
Akihiro Imamura, Fumio Koyama, "Modeling and experiment on tapered hollow waveguide multiplexer for multiwavelength VCSEL array", IEICE Electronics Express, vol. 5, no. 12, pp. 451-456, Jun., 2008.
Akihiro Matsutani, Hideo Ohtsuki, Fumio Koyama, "Generation of Solid-Source H2O Plasma and Its Application to Dry Etching of CaF2", Jpn. J. Appl. Phys., Vol. 47, No. 6, pp. 5113-5115, Jun., 2008.
Fumio Koyama, "Investigation and theoretical analysis of low-loss 3Dhollow waveguides for widely tunable photonic devices", Jpn. J. Appl. Phys., vol. 47, no. 5, May., 2008.

学会発表

Kyohei Tachi, Tomohiro Nishina, Tomoyuki Miyamoto, "Talbot effect and Lau effect caused by light emitter arrays with a finite number of point light sources", International Topical Meeting on Information Photonics 2008 (IP2008), Nov., 2008.
Tatsuya Oiwa, Tomohiro Nishina, Tomoyuki Miyamoto, "Phase locking conditions of VCSEL array with Talbot cavity", International Topical Meeting on Information Photonics 2008 (IP2008), Nov., 2008.
P. Babu Dayal, Jun Nakajima, Takahiro Sakaguchi, Akihiro Matsutani, Fumio Koyama, "Multiple-wavelength VCSEL arrays using surface nano-machining process for WDM applications", 21st Annual Meeting of The IEEE Lasers & Electro-Optics Society, LEOS2008, 21st Annual Meeting of The IEEE Lasers & Electro-Optics Society, LEOS2008, TuEE4, pp. 400-401, Nov., 2008.
Ayumi Fuchida, P. Babu Dayal, Takahiro Sakaguchi, Akihiro Matsutani, Fumio Koyama, "Low Polarization Dependence of Bragg Reflector Slow Light Waveguides", 21st Annual Meeting of The IEEE Lasers & Electro-Optics Society, LEOS2008, WN5, pp. 525-526, Nov., 2008.
Koichi Hasebe, Takahiro Sakaguchi, Yusuke Mada, Fumio Koyama, Xiaoxue Zhao, "Bandwidth Enhancement of Directly Modulated DFB Lasers and EML Lasers using Optical Equalizers", 21st Annual Meeting of The IEEE Lasers & Electro-Optics Society, LEOS2008, WV4, pp. 593-594, Nov., 2008.
Akihiro Matsutani, Hideo Ohtsuki, Fumio Koyama, "Dry Etching of Si by XeF2 Plasma and Investigation of Emission Intensities from Xe and F in XeF2 Plasma", 21st International Microprocessees and Nanotechnology Conference, 29D-9-58, Oct., 2008.
Fumio Koyama, "VCSELs: their 30 years history and new challenges", Asia Pacific Optical Communications, APOC2008, 7135-18, Oct., 2008.
Takayoshi Mori, Hiroyuki Uenohara, "Behavior of carrier plasma effect and thermal drift of a SSG-DBR-LD in wavelength switching", Conference on Optical Internet 2008 (COIN2008), C-16-AM2-2-1, Sep., 2008.
Masahiro Suzuki, Hiroyuki Uenohara, "First Demonstration of 10-Gbit/s Operation of an All-Optical Error Detection Circuit", 34th European Conference on Optical Communication (ECOC2008), P3.5, Sep., 2008.
Tomoyuki Kato, Akihiro Matsutani, Takahiro Sakaguchi, Kohroh Kobayashi, "31 GHz SUB-HARMONIC ACTIVE MODE-LOCKED VCSEL WITH LOW THRESHOLD CURRENT", MOC2008, Sep., 2008.
Tomoyuki Kato, Akihiro Matsutani, Takahiro Sakaguchi, Kohroh Kobayashi, "24GHz Mode-Locking of VCSEL with External Concave Mirror", ISLC2008, Sep., 2008.
Unknown Unknown, Hiroshi Nakajima, Kosuke Fujimoto, Tomoyuki Miyamoto, "Controllable large I-L kink of tunnel injection quantum well lasers", 21st IEEE International Semiconductor Laser Conference (ISLC2009), Sep., 2008.
Satoshi Suda, Xiaxue Xhao, Fumio Koyama, Connie J. Chang-Hasnain, Nobuhiko Nishiyama Chung-En Zah, "Tunable optical equalizer based on 1.55 µm VCSEL for modulation bandwidth enchancement", ISLC2008, ThB5, pp. 179, Sep., 2008.
Satoshi Suda, Fumio Koyama, Nobuhiko Nishiyama, Catherine Caneau, Chung-En Zah, "Optical Compensation of Fiber Nonlinearity Using Vertical Micro-cavity Saturable Absorber", ISLC2008, TuC1, pp. 63, Sep., 2008.
Keisuke Kuroki, Ayumi Fuchida, Takahiro Sakaguchi, Akihiro Matsutani, Fumio Koyama, "Miniature Optical Gate with VCSEL-based Slow Light Bragg Reflector Waveguide", ISLC2008, TuC3, pp. 67, Sep., 2008.
Fumio Koyama, "Tuning and slowing light in bragg reflector waveguides", iNOW2008, ThB2, pp. 105, Aug., 2008.
Go Yazawa, Hiroyuki Uenohara, "40Gb/s Operation Performance of an Optical Serial-to-Parallel Converter with Phase-Shifted Preamble and Mach-Zehnder Delay Interferometers", 13th Optoelectronics and Communications Conference (OECC2008), WeP-3, Jul., 2008.
Tomoyuki Kato, Akihiro Matsutani, Takahiro Sakaguchi, Kohroh Kobayashi, "Double-path resonance of a mode-locked VCSEL using a concave mirror", OECC/ACOFT 2008, Jul., 2008.
Unknown Unknown, Hiroshi Nakajima, Kosuke Fujimoto, Tomoyuki Miyamoto, "Energy relaxation control of injection carriers in tunnel injection quantum well lasers", Opto-Electronics and Communications Conference 2008 (OECC/ACOFT 2008), Jul., 2008.
Ryoichiro Suzuki, Tomoyuki Miyamoto, Tomoyuki Sengoku, Fumio Koyama, "High density InAs quantum dots on GaNAs buffer layer", 14th International Conference of Metalorganic Vapor Phase Epitaxy, IC-MOVPE XIV, Jun., 2008.
Fumio Koyama, "Recent advances of VCSEL photonics", MBE2008, pp. 27-28, Jun., 2008.
Hiroyuki Uenohara, "“Semiconductor lasers for high spectral density optical communications”, Workshop on High Spectral Density Optical Communication for Next Generation Network", pp. 56-59, Jun., 2008.
Fumio Koyama, "Nano-aperture plasmonic VCSELs", 20th Indium Phosphide and Related Materials Conference, IPRM2008, WeA1.2, May., 2008.
Ayumi Fuchida, Fumio Koyama, "Slow Light Total-Internal-Reflection Optical Switch with 90-Degree Bend", Conference on Lasers and Electro-Optics, CLEO, JWA86, May., 2008.
Xiaoxue Zhao, Bo Zhang, Louis Christen, Devang Parekh, Fumio Koyama, Werner Hofmann, Markus C. Amann, Alan E. Willner, Connie J. Chang-Hasnain, "Data Inversion and Adjustable Chirp in 10-Gbps Directly-Modulated Injection-Locked 1.55-µm VCSELs", Conference on Lasers and Electro-Optics, CLEO, CMW5, May., 2008.
Jun Nakajima, Fumio Koyama, "Nanofabrication of Sub-Wavelength Grating Using Ultra-Fine Nano-Machining Process", Conference on Lasers and Electro-Optics, CLEO, JTuA34, May., 2008.
Ayumi Fuchida, Fumio Koyama, "Total-internal-reflection optical switch with crossing-reflection angle to 90 degree", Conference on Lasers and Electro-Optics, JWA86, May., 2008.
Koichi Hasebe, Xiaoxue Zhao, Takahiro Sakaguchi, Fumio Koyama, Connie J. Chang-Hasnain, Nobuhiko Nishiyama, Catherine Caneau, Chung-En Zah, "Bandwidth Enhancement of Directly Modulated DFB Lasers and EML Lasers using Optical Equalizers", Conference on Lasers and Electro-Optics, CLEO, CME1, May., 2008.
Kosuke Fujimoto, Tomoyuki Miyamoto, Unknown Unknown, Hiroshi Nakajima, Fumio Koyama, "Theoretical Analysis of High Speed Semiconductor Optical Amplifier using Tunneling Injection Structure", Conference on Lasers and Electro-Optics, May., 2008.
Ryoichiro Suzuki, Tomoyuki Miyamoto, Tomoyuki Sengoku, Fumio Koyama, "Multilayer 1.4μm InAs Quantum dots with thin spacer using GaNAs strain compensation layer", 20th Indium Phosphide and Related Materials Conference, IPRM2008, May., 2008.

その他

Ryoichiro Suzuki, Tomoyuki Miyamoto, Tomoyuki Sengoku, Fumio Koyama, "High density InAs quantum dots on GaNAs buffer layer", 27th Electronic Materials Symposium (EMS-27), Jul., 2008.

2007

論文

Kohroh Kobayashi, Junya Kurumida, Hiroyuki Uenohara, "All-optical label recognition for time-domain signal using multistage switching scheme based on SOA-MZIs", Electron. Lett., Vol. 42, No. 23, pp. 1362-1363, Nov., 2007.
Padullaparthi Babudayal, Fumio Koyama, "Polarization control of 0.85μm vertical-cavity surface-emitting lasers integrated with gold nanorod arrays", Appl. Phys. Lett., vol. 91, pp. 111107, Nov., 2007.
Padullaparthi Babudayal, Naoto Kitabayashi, Tomoyuki Miyamoto, Fumio Koyama, T. Kawashima, S. Kawakami, "Polarization control of 1.15µm vertical-cavity surface-emitting lasers using autocloned photonic crystal polarizer", Appl. Phys. Lett., vol. 91, Jul., 2007.

学会発表

Hiroyuki Uenohara, "40Gbps Operation of a Semiconductor Optical DA Converter and its Application to Label Processing", International Joint Workshop on OCDMA and OPS 2007, pp. 91-93, Nov., 2007.
Sigeru Kanazawa, Kazutaka Takeda, Tomoyuki Miyamoto, Fumio Koyama, "High temperature operation of 1.2 μm single-transverse-mode highly strained GaInAs/GaAs QW laser", SPIE 2007, Nov., 2007.
Akihiro Matsutani, Hideo Ohtsuki, Fumio Koyama, "Dry Etching of CaF₂by Solid Source H₂O(ice) Plasma", 20th International Microprocesses and Nanotechnology Conference, 6A-4-94, pp. 248-249, Nov., 2007.
Tomoyuki Kato, Akihiro Matsutani, Takahiro Sakaguchi, Kohroh Kobayashi, "Model-Locked VCSEL with External Cavity Formed by Concave Mirror", No. WEE1, pp. 668-669, Oct., 2007.
Takayuki Higa, Tomoyuki Miyamoto, Hiroshi Nakajima, Kosuke Fujimoto, Fumio Koyama, "Theoretical design of carrier injection rate and recombination rate in tunnel injection quantum well lasers", 34th International Symposium on Compound Semiconductors, ISSC2007, p. 310, Oct., 2007.
Tomohiro Nishina, Yoshihiro Kashihara, Syuutarou Ishida, Tomoyuki Miyamoto, Fumio Koyama, "Thermal resistance reduction of GaAs based vertical cavity surface emitting lasers by thickness modulated distributed Bragg reflector", 13th Microoptics Conference, MOC '07, Oct., 2007.
Fumio Koyama, "VCSEL Photonics - Athermalization and Slowing Down –", Asia Optical Fiber Communication & Optoelectronics Exposition & Conference, AOE 2007, SC2.S5.1, pp. 275-277, Oct., 2007.
Tomofumi Takeishi, Fumio Koyama, "Giant Tuning Characteristics of Tapered Tunable Hollow Waveguide Bragg Reflector", 20th Annual Meeting of the IEEE Laser and Electro-Optical Society, LEOS2007, ThK3, pp. 769-770, Oct., 2007.
Ayumi Fuchida, Fumio Koyama, "Total-Internal-Reflection Optical Switch with Slowing Light in Bragg Reflector Waveguide", 20th Annual Meeting of the IEEE Laser and Electro-Optical Society, LEOS2007, 20th Annual Meeting of The IEEE Laser and Electro-Optical Society, LEOS2007, No. MK2, pp. 88-89, Oct., 2007.
Keisuke Kuroki, Go Hirano, Fumio Koyama, Koichi Hasebe, Takahiro Sakaguchi, "Slow Light Waveguide Detector Slowing Loght in Bragg Reflector Waveguide", 33rd European Conference and Exhibition on Optical Communication, ECOC07, P-49, Sep., 2007.
Satoshi Suda, Fumio Koyama, Nobuhiko Nishiyama, Catherine Caneau, Chung-En Zah, "Transient Behavior of Nonlinear Optical Compensator Based on Vertical Micro-Cavity Saturable Absorber", 33th European Conference and Exhibition on Optical Communication, ECOC07, P-42, Sep., 2007.
Kengo Sawada, Hiroyuki Uenohara, "First demonstration of 40-Gbit/s operation of a semiconductor integrated optical digital-to-analog converter", 33th European Conference on Optical Communication (ECOC2007), pp. P037, Sep., 2007.
Akihiro Matsutani, Hideo Ohtsuki, Fumio Koyama, "Decreasing of Residual Oxygen by using Si Solid Source in Cl2 -ICP Etching of Al", 18th International Symposium on Plasma Chemistry, ISPC18, Aug., 2007.
Yusuke Takanashi, Junya Kurumida, Hiroyuki Uenohara, Kohroh Kobayashi, "A study on the Timing Adjustable Optical Regenerator using Cross Phase Modulation based on Semiconductor Optical Amplifiers", Photonics in Switching 2007 (PS2007), pp. WB4.4, Aug., 2007.
Ryoichiro Suzuki, Tomoyuki Miyamoto, Fumio Koyama, "Reduction of spacer layer thickness of InAs quantum dots using GaNAs strain compensation layer", The 7th Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim 2007, Aug., 2007.
Akihiro Matsutani, Hideo Ohtsuki, Fumio Koyama, "Plasma characterization of H2O-inductively coupled plasma for dry etching", 17th International Vacuum Congress, IVC-17, PSTFP4-187, Jul., 2007.
Fumio Koyama, "New Functions and Challenges of VCSEL-related Photonic Devices", International Nano-Optoelectronic Workshop, iNOW 2007, International Nano-Optoelectronic Workshop, iNOW 2007, Jul., 2007.
Kensuke Okamoto, Hiroyuki Uenohara, "Demonstration of a Semiconductor-based Multi-Wavelength Light Source and its Application to Optical Label Processing", 12th Optoelectronics and Communications Conference / 16th International Conference on Integrated Optics and Optical Fiber Communication (OECC/IOOC2007), pp. 13A3-3, Jul., 2007.
Hiroshi Nakajima, Tomoyuki Miyamoto, Takahiro Iwasaki, Unknown Unknown, Fumio Koyama, "Analysis of large kink mechanism in I-L characteristics of tunnel injection lasers", 12th Optoelectronics and Communications Conference/16th International Conference on Integrated Optics and Optical Fiber Communication, OECC/IOOC2007, Jul., 2007.
Tomofumi Takeishi, Satoshi Suda, Fumio Koyama, "Nanoimprint and nano-machinning process for tunable hollow wavegiude devices", IEEE LEOS Summer Topicals, TuB4.5, pp. 123-124, Jul., 2007.
Akihiro Matsutani, Naoki Jogan, Fumio Koyama, Kohroh Kobayashi, "Etching Chracteristics of Low-k Polymer for Wide Modulation Bandwidth VCSELs", 12th Optoelectronics and Communications Conference/16th International Conference on Integrated Optics and Optical Fiber Communication, OECC/IOOC2007, 11P-27, pp. 274-275, Jul., 2007.
Satoshi Suda, Fumio Koyama, "High Speed Response of Optical Nonlinear Phase Shifter Based on 1.55 μm VCSEL", International Nano-Optoelectronic Workshop, iNOW 2007, 84, pp. 278-279, Jul., 2007.
Naoto Kitabayashi, Akihiro Imamura, Akihiro Matsutani, Fumio Koyama, "Tapered Hollow Waveguide Multiplexer for Multi-wavelength VCSEL array", 12th Optoelectronics and Communications Conference/16th International Conference on Integrated Optics and Optical Fiber Communication, OECC/IOOC2007, 12D4-2, pp. 410-411, Jul., 2007.
Koichi Hasebe, Wiganes Janto, Nobuhiko Nishiyama, Catherine Caneau, Takahiro Sakaguchi, Akihiro Matsutani, Fumio Koyama, Chung-En Zah, "Transverse-mode and Polarization Characteristics of 1.55 μm Micromachined VCSELs", 12th Optoelectronics and Communications Conference/16th International Conference on Integrated Optics and Optical Fiber Communication, OECC/IOOC2007, 12th Optoelectronics and Communications Conference/16th International Conference on Integrated Optics and Optical Fiber Communication, OECC/IOOC2007, No. 12D4-3, pp. 412-413, Jul., 2007.
Keisuke Kuroki, Go Hirano, Fumio Koyama, "Modeling of Slow Light Modulator with Tilt Coupling Scheme", 12th Optoelectronics and Communications Conference/16th International Conference on Integrated Optics and Optical Fiber Communication, OECC/IOOC2007, 12D4-5, pp. 416-417, Jul., 2007.
Tomofumi Takeishi, Takahiro Sakaguchi, Fumio Koyama, "Fabrication and characterization of tunable chromatic dispersion compensator based on hollow waveguide", 12th Optoelectronics and Communications Conference/16th International Conference on Integrated Optics and Optical Fiber Communication, OECC/IOOC2007, 12th Optoelectronics and Communications Conference/16th International Conference on Integrated Optics and Optical Fiber Communication, OECC/IOOC2007, 12E3-3, pp. 442-443, Jul., 2007.
Akihiro Imamura, Fumio Koyama, "Beam steering and coupling in tunable hollow waveguide with narrow air core", 12th Optoelectronics and Communications Conference/16th International Conference on Integrated Optics and Optical Fiber CommunicationOECC/IOOC2007, 13E2-3, pp. 694-695, Jul., 2007.
Satoshi Suda, Fumio Koyama, "Modeling of Optical Nonlinear-Effect Compensator With Vertical-Cavity Saturable Absorber", 12th Optoelectronics and Communications Conference/16th International Conference on Integrated Optics and Optical Fiber Communication, OECC/IOOC2007, 12th Optoelectronics and Communications Conference/16th International Conference on Integrated Optics and Optical Fiber Communication, OECC/IOOC2007, Vol. 10D2-5, pp. 74-75, Jul., 2007.
Hiroyuki Uenohara, Kengo Sawada, "Investigation of Operation Tolerance of a Semiconductor Optical Digital-to-Analog Converter on Phase and Intensity Fluctuation", Conference on Opitcal Internet / Australian Conference on Fiber Technology (COIN/ACOFT2007), pp. WeB3-5, Jun., 2007.
Satoshi Suda, Fumio Koyama, Nobuhiko Nishiyama, Catherine Caneau, Chung-En Zah, "High Speed Response of Optical Nonlinear Phase Shifter Based on 1.55 μm VCSEL", CLEO 2007, CMP6, May., 2007.

2006

論文

Fumio Koyama, "Recent Advances of VCSEL Photonics", IEEE J. Lightwave Technol., vol. 24, no. 12, pp. 4502-4513, 2006.
Wiganes Janto, Akihiro Matsutani, Fumio Koyama, "Design, Fabrication, and Characterization of Tunable Micromachined Filter with Double-Cavity Structure", Jpn. J. Appl. Phys., Vol. 45, No. 10A, pp. 7732-7736, Oct., 2006.
Akihiro Matsutani, Hideo Ohtsuki, Fumio Koyama, "Solid Source Dry Etching Process for GaAs and InP", Jpn. J. Appl. Phys., Vol. 45, No. 10B, pp. 8374-8377, Oct., 2006.
Kenichi Iga, "Vertical cavity surface emitting lasers photonics", Jpn. J. Appl. Phys., vol. 45, no. 8B, pp. 6541-6543, Aug., 2006.
Chang-Hwan Bae, Fumio Koyama, "Design and Fabrication of Multi-Mode Interference Hollow Waveguide Optical Switch with Variable Air Core", Jpn. J. Appl. Phys, Vol. 45, No. 8B, pp. 6648-6653, Aug., 2006.
Kazutaka Takeda, Tomoyuki Miyamoto, Takashi Kondo, Yasuhiro Uchiyama, Naoto Kitabayashi, Takeshi Uchida, Akihiro Matsutani, Fumio Koyama, "Wavelength extension effect on lasing characteristics of highly-strained GaInAs/GaAs vertical-cavity surface-emitting lasers with cavity detuning", Jpn. J. Appl. Phys., vol. 45, no. 8B, pp. 6691-6696, Aug., 2006.
Koichi Hasebe, Fumio Koyama, "Modeling of All-Optical-Signal Processing Devices Based on Two-Mode Injection-Locked Vertical-Cavity Surface-Emitting Laser", Jpn. J. Appl. Phys, Vol. 45, No. 8B, pp. 6697-6703, Aug., 2006.
Syuutarou Ishida, Tomoyuki Miyamoto, Fumio Koyama, "Short-period GaInAs/InP superlattice for distributed Bragg reflector", Jpn. J. Appl. Phys., vol. 45, no. 28, pp. L723-L725, Jul., 2006.
Fumio Koyama, Miura Toru, Yasuki Sakurai, "Tunable Hollow Optical Waveguides and Their Applications for Photonic Integrated Circuits", Electronics and Communications in Japan, vol. 89, no. 4, pp. 9-18, Jun., 2006.
Ryoichiro Suzuki, Tomoyuki Miyamoto, Tetsuya Matsuura, Fumio Koyama, "Photoluminescence characterization of InAs quantum dots on GaNAs buffer layer by metalorganic chemical vapor deposition", Jpn. J. Appl. Phys., vol. 45, no. 23, pp. L585-L587, Jun., 2006.

学会発表

P. Babu Dayal, Jiro Hashizume, Fumio Koyama, "Polarization control of 0.85 μm GaAs VCSELs using Au-Sio2 nanostructures", Photonics 2006, ThD2, 2006.
Hiroyuki Uenohara, "Optical label processing scheme using optical digital-to-analog converters and self-gate pulse generator with phase modulated preamble", Joint workshop on OPS and OCDMA, 2006.
Fumio Koyama, "Nano-aperture VCSELs", 2006 IEEE LEOS Annual Meeting Conference, LEOS 2006, WB1, pp. 442-443, Oct., 2006.
Wiganes Janto, Koichi Hasebe, Nobuhiko Nishiyama, Catherine Caneau, Takahiro Sakaguchi, Akihiro Matsutani, P. Babu Dayal, Fumio Koyama, Chung-En Zah, "Athermal operation of 1.55 μm InP-based VCSEL with thermally-actuated cantilever structure", 20th International Semiconductor Laser Conference, 20th International Semiconductor Laser Conference, PD1.1, Sep., 2006.
Go Hirano, Fumio Koyama, "Modeling of Vertical-cavity Electro-absorption Modulator with High-Q factor Resonator", Asia-Pacific Optical Communications Conference, APOC2006, 6352-34,4a, Sep., 2006.
Satoshi Suda, Go Hirano, Fumio Koyama, Catherine Caneau, Chung-En Zah, "Optical Nonlinear-Effect Compensator Based on Vertical-cavity Saturable Absorber", 32th Europian Conference on Optical Communication, ECOC, Th1.4.7, Sep., 2006.
Yasushi Yokota, Fumio Koyama, "Tunable Spot Size Converter and Vertical Resonant Coupler Based on Hollow Optical Waveguide", 32th European Conference on Optical Communication, ECOC, 32th European Conference on Optical Communication, ECOC, We3.p.76, Sep., 2006.
Hideaki Yamakawa, Fumio Koyama, "Hybrid-Integrated Tunable Hollow Waveguide DBR Laser", 32th European Conference on Optical Communication, ECOC, We.p.54, Sep., 2006.
Satoshi Shimizu, Hiroyuki Uenohara, Kohroh Kobayashi , "A Novel Scheme of Start Bit Detection and Single Pulse Generation for High-Speed Optical Signal Processing", ECOC2006, pp. Th2.4.2, Sep., 2006.
Padullaparthi Babudayal, Takashi Kawashima, Naoto Kitabayashi, Tomoyuki Miyamoto, Fumio Koyama, S. Kawakami, "Polarization control of 1.2µm single-mode VCSELs using photonic crystal polarizer", "20th International Semiconductor Laser Conference, ISLC2006", Sep., 2006.
Sigeru Kanazawa, Kazutaka Takeda, Tomoyuki Miyamoto, Fumio Koyama, "High temperature operation of 1.2μm single-transverse-mode highly strained GaInAs/GaAs QW laser", Asia-Pacific Optical Communications Conference, APOC2006, No. 6352-24, Sep., 2006.
Jiro Hashizume, Padullaparthi Babudayal, Fumio Koyama, "Metal Nano-aperture VCSEL for Near-Field Optics and Polarization Control", 20th International Semiconductor Laser Conference, ISLC2006, WB1, pp. 101-102, Sep., 2006.
Satoshi Suda, Go Hirano, Fumio Koyama, Nobuhiko Nishiyama, Catherine Caneau, Chung-En Zah, "Tunable Optical Delay and Nonlinear Phase Shift using 1.55 µm VCSEL", EEE ISLC2006, WC4, pp. 121-122, Sep., 2006.
Fumio Koyama, "VCSEL Integration for Silicon Photonics", 2006 3rd IEEE International Conference, ⅣPhotonics, ThB4, pp. 194-196, Sep., 2006.
Keisuke Kuroki, Fumio Koyama, "Propasal and Modeling of miniature Slow Light Modulator Integrated with VCSEL", 12th Microoptics Conference, MOC, J-1, pp. 222- 223, Sep., 2006.
Hideaki Yamakawa, Fumio Koyama, "Athermal GaInAsP/InP Semiconductor Laser Using Hollow Waveguide Distributed Bragg Reflector", 12th Microoptics Conference, MOC, A-2, pp. 38-39, Sep., 2006.
Kohroh Kobayashi, "R&D on Next-Generation Optical Communications and Broadband in Japan", 32th European Conference on Optical Communication（ECOC）, Sep., 2006.
Hiroyuki Uenohara, Kohroh Kobayashi, "All-Optical Label and Payload Separation using a Self-switching Technique of a SOA-MZI", 32th European Conference on Optical Communication（ECOC）, Sep., 2006.
Kohroh Kobayashi, "All-optical label and payload separation using a self-switching technique of a SOA-MZI", ECOC2006, ECOC2006, Sep., 2006.
Kohroh Kobayashi, "R&D on Next-Generation Optical Communications and Broadband Acess in Japan", ECOC2006, ECOC2006, Sep., 2006.
Satoshi Shimizu, Hiroyuki Uenohara, Kohroh Kobayashi, "A novel scheme of start bit detection and single pulse generation for high-speed optical signal processing", 32th European Conference on Optical Communication (ECOC2006), Sep., 2006.
Hideaki Yamakawa, Tomoyuki Serizawa, Yasuki Sakurai, Fumio Koyama, "Tunable Laser with Hollow Waveguide Distributed Bragg Reflector", OECC 2006, 6C2-2-1, Jul., 2006.
Wiganes Janto, Akihiro Matsutani, Fumio Koyama, "Double-Cavity Micromachined Filter With Electrical Actuation", The 11th Opticalelectoronics and Communications Conference, OECC 2006, The 11th Opticalelectoronics and Communications Conference, OECC 2006, 5B1-3-1, Jul., 2006.
Junya Kurumida, Hiroyuki Uenohara, Kohroh Kobayashi, "All-optical time domain label separation by SOA-MZI self-switching scheme", OECC2006, OECC2006, pp. 5E4-3-1, Jul., 2006.
Makoto Ohkado, Hiroyuki Uenohara, "Demonstration of an optical label switch with an EA modulator-cascaded optical serial-to-parallel converter", 5th International Conference on Optical Internet (COIN2006), pp. TuA2-4, Jul., 2006.
Junya Kurumida, Hiroyuki Uenohara, Kohroh Kobayashi, "All-optical Time Domain Label Separation by SOA-MZI Self-switching Scheme", The 11th Opticalelectoronics and Communications Conference（OECC 2006）, No. 5E4-3-1, Jul., 2006.
Kengo Sawada, Hiroyuki Uenohara, "Operation performance of a semiconductor integrated optical digital-to-analog converter by external phase control", 12th Microoptics Conference (MOC2006), Jul., 2006.
Koichi Hasebe, Fumio Koyama, Nobuhiko Nishiyama, Catherine Caneau, Chung-En Zah, "All-optical Polarization Controller Using Elliptical-Apertured 1.5μm VCSEL", Conference on Lasers and Electro-Optics, CLEO 2006, Conference on Lasers and Electro-Optics（CLEO 2006）, CWP1, May., 2006.
Satoshi Suda, Fumio Koyama, Nobuhiko Nishiyama, Catherine Caneau, Chung-En Zah, "Optical Nonliner Phase Shifter Using Vertical Microcavity with Saturable Absorber", Conference on Lasers and Electro-Optics, CLEO 2006, Conference on Lasers and Electro-Optics, CLEO 2006, CWK3, May., 2006.

2005

論文

Hiroyuki Uenohara, R. Kurosawa, "Semiconductor optical digital-to-analogue converter", Electronics Letters (The Institute of Electrical Engineers), Vol. 41, No. 23, pp. 1299-1300, Nov., 2005.
Maiko Ariga, Masakazu Arai, Takeo Kageyama, C. Setiagung, Yoshihiko Ikenaga, N. Iwai, Hitoshi Shimizu, K. Nishikawa, Akihiko Kasukawa, Fumio Koyama, "Noise Characteristics of GaInNAsSb 1300-nm-Range VCSEL with Optical Feedback for Isolator-Free Module", IEEE J. Select. Top. Quantum Electron., vol. 11, no. 5, pp. 1074-1078, Sep., 2005.
Yutaka Onishi, Nobuhiko Nishiyama, Catherine Caneau, Fumio Koyama, Chung-En Zah, "All-optical Inverter Based on Long-Wavelength Vertical-Cavity Surface0Emitting Laser", IEEE J. Select. Top. Quantum Electron, vol. 11, no. 5, pp. 999-1005, Sep., 2005.
Satoshi Suda, Fumio Koyama, "Characterization of spot-size dependence of coarse wavelength division multiplexing dielectric multilayer thin-film filters for planner lightwave circuit platforms", Jpn. J. Appl. Phys., vol. 44, no. 39, pp. L1225-L1227, Sep., 2005.
Koichi Hasebe, Yutaka Onishi, Fumio Koyama, "All-optical regenerator with re-polarization function based on dual optical injection VCSEL", IEICE ELEX, vol. 2, no. 11, pp. 338-343, Jun., 2005.

学会発表

Fumio Koyama, "New Functions and Emerging Technologies for VCSEL-related Device", International Symposium on Asia-Pacific Optical Communications 2005, APOC2005, International Symposium on Asia-Pacific Optical Communications 2005, APOC2005, Nov., 2005.
Hiroyuki Uenohara, H. Takeda, "Cascaded wavelength converter for optical regeneration", APOC2005, pp. 6020-53, Nov., 2005.
M. Ohkado, Hiroyuki Uenohara, "Performance of Two-Bit Optical Serial-to-Parallel Converter using Cascaded Electroabsorption Modulators", 11th Microoptics Conference, pp. K4, Nov., 2005.
Fumio Koyama, "Modelling of high-speed polarization controller based on injection-locked two-mode VCSEL", 11th Microoptics Conference, MOC'05, 11th Microoptics Conference, MOC'05, M2, Oct., 2005.
H. Takeda, Hiroyuki Uenohara, "Improvement of Transmission Characteristics With Chirping Control Scheme in Optical Signal Regenerator Using SOA Gain Saturation and XGM Signal", The 18th Annual Lasers and Electro Optics Society Meeting (LEOS2005), pp. MO2, Oct., 2005.
Yasuhiro Uchiyama, Takashi Kondo, Kazutaka Takeda, Akihiro Matsutani, Takeshi Uchida, Tomoyuki Miyamoto, Fumio Koyama, "Electro-thermal wavelength tuning of 1.2µm GaInAs/GaAs vertical cavity surface emitting laser array", The 18th Annual Meeting of the IEEE Lasers and Electro-Optics Society, Oct., 2005.
Takeshi Uchida, Tomoyuki Miyamoto, Takahiro Sakaguchi, Fumio Koyama, "High-Order Transverse Mode Suppression in VCSELs with Temperature-Profile Control", The 18th Annual Meeting of the IEEE Lasers and Electro-Optics Society, Oct., 2005.
Kazutaka Takeda, Tomoyuki Miyamoto, Takashi Kondo, Yasuhiro Uchiyama, Akihiro Matsutani, Takeshi Uchiyama, Fumio Koyama, "Wavelength Extension with Cavity Detuning in Vertical Cavity Surface Emitting Lasers", 11th Microoptics Conference, Oct., 2005.
Miura Toru, Yasushi Yokota, Fumio Koyama, "Proposal of tunable demultiplexer based on tapered hollow waveguide with highly reflective multilayer mirrors", 18th Annual Meeting of the IEEE Lasers and Electro-Optics Society, LEOS2005, 18th Annual Meeting of the IEEE Lasers and Electro-Optics Society, LEOS2005, TuL3, pp. 272-273, Oct., 2005.
Jiro Hashizume, Fumio Koyama, "Transverse and polarization mode controlled vertical cavity surface emitting laser with metal nano-aperture array for optical near-field", 18th Annual Meeting of the IEEE Lasers and Electro-Optics Society, LEOS2005, 18th Annual Meeting of the IEEE Lasers and Electro-Optics Society, LEOS2005, WK3, pp. 467-468, Oct., 2005.
Fumio Koyama, "Air-core Resonator with Widely Tunable Hollow Waveguide Bragg Reflectors", 31st European Conference on Optical Communication, ECOC2005, 31st European Conference on Optical Communication, ECOC2005, Sep., 2005.
Hiroyuki Uenohara, S. Shimizu, K. Kobayashi, "Switching Performance of an Optical Label Switch using Optical Digital-to-Analog Conversion-based Header Processor with Self-Gate-Pulse-Generator and Power Equalizer", 31th European Conference on Optical Communication(ECOC2005), pp. Th3.4.1, Sep., 2005.
Hiroyuki Uenohara, R. Kurosawa, "First Demonstration of a Semiconductor-Integrated Optical Digital-to-Analog Converter", 31th European Conference on Optical Communication(ECOC2005), pp. Tu3.6.4, Sep., 2005.
Tetsuya Matsuura, Tomoyuki Miyamoto, Masataka Ohta, Fumio Koyama, "Photoluminescence Characterization of (Ga)InAs Quantum Dots with GaInAsSb Cover Layer Grown by MBE", 32th International Symposium on Compound Semiconductors, Sep., 2005.
Masataka Ohta, Tatsuya Furuhata, Tetsuya Matsuura, Yasutaka Matsui, Tomoyuki Miyamoto, Fumio Koyama, "MBE Growth of High Quality Highly Strained GaInAs/GaAs QWs for 1200nm Lasers", 32th International Symposium on Compound Semiconductors, Sep., 2005.
Ryoichiro Suzuki, Tomoyuki Miyamoto, Tetsuya Matsuura, Fumio Koyama, "InAs Quantum Dot formed on GaNAs Buffer Layer by Metalorganic Chemical Vapor Deposition", 32th International Symposium on Compound Semiconductors, Sep., 2005.
Fumio Koyama, "Widely Tunable Micromachined Optical Devices for Future Photonic Integrated Circuits", FIS Conference on future integrated, FIS Conference on future integrated, p. 24, Aug., 2005.
Hiroyuki Uenohara, S. Shimizu, .and K. Kobayashi, "Operation performance of an optical digital-to-analog converter with regeneration-type power equalization", 10th Opto-Electronics and Communication Conference(OECC2005), pp. 6B3-4, Jul., 2005.
Y. Takase, Hiroyuki Uenohara, "Switching performance of a novel optical label switch with time domain separated WDM labels", IQEC and CLEO-PR2005, pp. CFJ4-4, Jul., 2005.
Junya Kurumida, Y. Tatara, Hiroyuki Uenohara, Kohroh Kobayashi, "All-optical header recognition sub-system based on SOA-MZE switches", IQEC2005 and CLEO/PR2005, IQEC2005 and CLEO/PR2005, pp. CFJ4-5, 1790-1791, Jul., 2005.
Masataka Ohta, Tomoyuki Miyamoto, Tetsuya Matsuura, Yasutaka Matsui, Tatsuya Furuhata, Takahiro Iwasaki, Yoshihiro Kashihara, Fumio Koyama, "Structure dependence of lasing characteristics of GaInAs/AlGaAs tunnel injection lasers", International Quantum Electronics Conference 2005 and the Pacific Rim Conference on Lasers and Electro-Optics 2005, Jul., 2005.
Takeshi Uchida, Tomoyuki Miyamoto, Fumio Koyama, "Transverse mode control in VCSELs with temperature-profile control", International Quantum Electronics Conference 2005 and the Pacific Rim Conference on Lasers and Electro-Optics 2005, Jul., 2005.
Yutaka Onishi, Nobuhiko Nisiyama, Athaline Caneau, Fumio Koyama, "All-optical regeneration based on vertical-cavity surface-emitting lasers", International Quantum Electronics Conference 2005 and the Pacific Rim Conference on Lasers and Electro-Optics 2005, IQEC and CLEO-PR 2005, International Quantum Electronics Conference 2005 and the Pacific Rim Conference on Lasers and Electro-Optics 2005, IQEC and CLEO-PR 2005, CTuJ2-3, pp. 162-163, Jul., 2005.
Koichi Hasebe, Yutaka Onishi, Fumio Koyama, "Novel polarization controller based on injection vertical-cavity surface emitting laser", International Quantum Electronics Conference 2005 and the Pacific Rim Conference on Lasers and Electro-Optics 2005, IQEC and CLEO-PR 2005, International Quantum Electronics Conference 2005 and the Pacific Rim Conference on Lasers and Electro-Optics 2005, IQEC and CLEO-PR 2005, CTuJ2-4, pp. 164-165, Jul., 2005.
Jiro Hashizume, Fumio Koyama, "Polarization controlled VCSEL with metal nano-structure for near-field optics", International Quantum Electronics Conference 2005 and the Pacific Rim Conference on Lasers and Electro-Optics 2005, International Quantum Electronics Conference 2005 and the Pacific Rim Conference on Lasers and Electro-Optics 2005, CTuJ3-1, pp. 284-285, Jul., 2005.
Chang-Hwan Bae, Fumio Koyama, "Fabrication and characterization of hollow waveguide optical switch with variable air core", 10th Optoelectronics and Communications Conference, OECC2005, 7E2-5, pp. 452-453, Jul., 2005.
Wiganes Janto, Fumio Koyama, Akihiro Matsutani, "Tunable Narrowband Optical Micromachined Filter with Double-Cavity Structure", 10th Optoelectronics and Communications Conference, OECC2005, 10th Optoelectronics and Communications Conference, OECC2005, 7E3-7, pp. 466-467, Jul., 2005.
Satoshi Suda, Fumio Koyama, "Measurement and Modeling of Spot-size Dependence of CWDM Dielectric Multilayer Thin-film Filters", 10th Optoelectronics and Communications Conference, OECC2005, 10th Optoelectronics and Communications Conference, OECC2005, 5E2-5, pp. 92-93, Jul., 2005.
Yasuki Sakurai, Akihiro Matsutani, Fumio Koyama, "Tunable Stop-Band Hollow Waveguide Bragge Reflector with Tapered Air-Core for Adaptive Dispersion-Compensation", Conference on Lasers and Electro-Optics, CLEO2005, Conference on Lasers and Electro-Optics, CLEO2005, CPDA6, CMP5, May., 2005.

2004

論文

Yasuhiro Uchiyama, Takashi Kondo, Kazutaka Takeda, Akihiro Matsutani, Takeshi Uchida, Tomoyuki Miyamoto, Fumio Koyama, "Thermal cross-talk evaluation of densely integrated vertical cavity surface emitting laser array", IEICE Electronics Express, vol. 1, no. 17, pp. 545-550, 2004.
Masataka Ohta, Tomoyuki Miyamoto, Tetsuya Matsuura, Yasutaka Matsui, Tatsuya Furuhata, Fumio Koyama, "Optical quality dependence on growth rate for solid-source MBE grown highly-strained GaInAsSb/GaAs QWs", Jpn. J. Appl. Phys., vol. 43, no. 12B, pp. L1569-L1571, Nov., 2004.
Masao Kawaguchi, Tomoyuki Miyamoto, Fumio Koyama, "Improvement in photoluminescence efficiency of GaInNAs/GaAs quantum wells grown by metalorganic chemical vapor deposition for low threshold 1.3μm range lasers", Jpn. J. Appl. Phys., vol. 43, no. 8A, pp. 5262-5268, Aug., 2004.
Junji Kinoshita, Tomoyuki Miyamoto, Yutaka Onishi, Fumio Koyama, "Characterization of single-wavelength optically pumped GaInAsP/InP vertical-cavity surface-emitting lasers with dielectric mirrors", Jpn. J. Appl. Phys., vol. 43, no. 8B, pp. 5928-5932, Aug., 2004.
Takeshi Uchida, Tomoyuki Miyamoto, Fumio Koyama, "Analysis on the compensating thermal lensing effect using a convex mirror in vertical-cavity surface-emitting lasers", Jpn. J. Appl. Phys., vol. 43, no. 8B, pp. 5933-5936, Aug., 2004.
Takeo Kageyama, Tomoyuki Miyamoto, Masataka Ohta, Tetsuya Matsuura, Yasutaka Matsui, Tatsuya Furuhata, Fumio Koyama, "Sb surfactant effect on GaInAs/GaAs highly strained quantum well lasers emitting at 1200 nm-range grown by molecular beam epitaxy", J. Appl. Phys., vol. 96, no. 1, pp. 44-48, Jul., 2004.
Akihiro Matsutani, Hideo Ohtsuki, Ken Ohashi, Tomonori Yokoyama, Hirokazu Yamakage, Fumio Koyama, "Vertical and Smooth Microfabrication of InP Using Simple High-Density Plasma System with SmCo Ring Magnet", Jpn. J. Appl. Phys., Vol. 43, No. 7B, pp. L960-L962, Jul., 2004.
Yasuki Sakurai, Fumio Koyama, "Tunable hollow waveguide distributed Bragg reflectors with variable air core", Optics Express, vol. 12, no. 13, pp. 2851-2856, Jun., 2004.

学会発表

Yasuhiro Uchiyama, Takashi Kondo, Kazutaka Takeda, Akihiro Matsutani, Jiro Hashizume, Takeshi Uchida, Tomoyuki Miyamoto, Fumio Koyama, "1.2 μm band high-density multiple-wavelength vertical cavity surface emitting laser array", The 17th Annual Meeting of the IEEE Lasers and Electro-Optics Society, LEOS2004, Nov., 2004.
Takashi Kondo, Yasuhiro Uchiyama, Kazutaka Takeda, Akihiro Matsutani, Tomoyuki Miyamoto, Fumio Koyama, "Highly strained GaInAs/GaAs 1.21 μm vertical cavity surface emitting laser with single-mode output power of 3mW", The 17th Annual Meeting of the IEEE Lasers and Electro-Optics Society, LEOS 2004, Nov., 2004.
Takashi Kondo, Yasuhiro Uchiyama, Kazutaka Takeda, Akihiro Matsutani, Tomoyuki Miyamoto, Fumio Koyama, "Highly strained GaInAs/GaAs 1.21µm vertical cavity surface emitting laser with single-mode output power of 3mW", The 16th Annual Meeting of the IEEE Lasers and Electro-Optics Society, Nov., 2004.
Syuutarou Ishida, Tomoyuki Miyamoto, Fumio Koyama, "GaInAs/InP superlattice DBR for long-wavelength VCSELs", International Conference on Solid State Device and Materials, Sep., 2004.
Tetsuya Matsuura, Tomoyuki Miyamoto, Masataka Ohta, Yasutaka Matsui, Tatsuya Furuhata, Fumio Koyama, "PL Characteristics of InAs Quantum Dots with Sb Irradiation in Growth Interruption", The 13th International Conference on Molecular Beam Epitaxy 2004, The 13th International Conference on Molecular Beam Epitaxy, pp. MC1.3, Aug., 2004.
Yasushi Yokota, Miura Toru, M. Ishikawa, Akihiro Matsutani, Fumio Koyama, "Fabrication of Hollow Optical Waveguide with Wafer Bonding", OptoElectronics and Communications Conference/International Conference on Optical Internet, 9th OptoElectronics and Communications Conference, OECC/COIN2004, 16F1-4, Jul., 2004.
Wiganes Janto, Fumio Koyama, Akihiro Matsutani, "GaAs/GaAiAs Micromachined Double-Cavity Structure for Tunable Filter and Dispersion Compensator", OptoElectronics and Communications Conference/International Conference on Optical Internet, OptoElectronics and Communications Conference/International Conference on Optical Internet, OECC/COIN2004, PD2-2, Jul., 2004.
K. Kim, Fumio Koyama, M. Kadoya, Tatsuo Izawa, "ModelinG.f Second Harmonic Generation from Intra-Cavity Surface-Emitting Lasers with Nonlinear Crysta", OptoElectronics and Communications Conference/International Conference on Optical Internet, 13P-107, Jul., 2004.
Satoshi Suda, Fumio Koyama, "Spot-Size Dependence of Dispersion Characteristics of Dielectric Multilayer Thin-film Filters", OptoElectronics and Communications Conference/International Conference on Optical Internet, 9th OptoElectronics and Communications Conference, OECC/COIN2004, 16F2-5, Jul., 2004.
Masataka Ohta, Tomoyuki Miyamoto, Tetsuya Matsuura, Yasutaka Matsui, Tatsuya Furuhata, Fumio Koyama, "Lasing characteristics of highly-strained thin GaInAs/GaAs multiple quantum well lasers", OptoElectronics and Communications Conference/International Conference on Optical Internet, OptoElectronics and Communications Conference/International Conference on Optical Internet, No. 14E2-4, Jul., 2004.
Tetsuya Matsuura, Tomoyuki Miyamoto, Masataka Ohta, Yasutaka Matsui, Tatsuya Furuhata, Fumio Koyama, "Wavelength elongation of MBE grown (GaInAs )QD by GaInAsSb cover layer", International Conference on Indium Phosphide and Related Materials, The 16th International Conference on Indium Phosphide and Related Materials, Jun., 2004.
Atsushi Saito, Tomoyuki Miyamoto, Masao Kawaguchi, Fumio Koyama, "The effect of current annealing for GaInNAs/GaAs laser grown by metalorganic chemical vapor deposition", International Conference on Indium Phosphide and Related Materials, Jun., 2004.

2003

論文

Akihiro Matsutani, Hideo Ohtsuki, Fumio Koyama, "Low-Temperature Dry Etching of InP by Inductively Coupled Plasma Using HI/Cl2", Jpn. J. Appl. Phys., Vol. 42, No. 12A, pp. L1414-L1415, 2003.
Akihiro Matsutani, Hideo Ohtsuki, Fumio Koyama, "Cl2-based Inductively Coupled Plasma Etching of InP Using Internal Antenna", Jpn. J. Appl. Phys., Vol. 42, No. 11, pp. 6837-6838, Nov., 2003.
Takeshi Uchida, Tomoyuki Miyamoto, "Analysis of transverse-mode control in VCSELs using a convex mirror", Jpn. J. Appl. Phys., vol. 42, no. 11, pp. 6883-6886, Nov., 2003.
Toru Miura, Fumio Koyama, Akihiro Matsutani, "Novel phase-tunable three-dimensional hollow waveguides with variable air core", IEEE Photon. Technol. Lett., vol. 15, no. 9, pp. 1240-1242, Sep., 2003.
Masakazu Arai, Takashi Kondo, Akihiro Onomura, Akihiro Matsutani, Tomoyuki Miyamoto, Fumio Koyama, "Multiple-wavelength GaInAs/GaAs vertical cavity surface emitting laser array with extended wavelength span", IEEE J. Select. Top. Quantum Electron., vol. 9, no. 5, pp. 1367-1373, Sep., 2003.
Takeshi Yamatoya, Fumio Koyama, "Optical preamplifier using antireflection-coating-free semiconductor optical amplifier with signal-inverted ASE", IEEE Photon. Technol. Lett., vol. 15, no. 8, pp. 1047-1049, Aug., 2003.
Tomoyuki Miyamoto, Masataka Ohta, Tetsuya Matsuura, Yasuhisa Matsui, Fumio Koyama, "Thermal annealing effect on self-assembled GaInNAs/GaAs quantum dots grown by chemical beam epitaxy", Physica Status Solidi, vol. 0(c), no. 4, pp. 1097-1100, Aug., 2003.

学会発表

Masao Kawaguchi, Tomoyuki Miyamoto, Shinichiro Kawakami, Shugo Minobe, Atsushi Saito, Fumio Koyama, "Strain-compensated lasers for various phosphorous content", The 5th Pacific Rim Conference on Lasers and Electro-Optics, 2003.
Tetsuya Matsuura, Tomoyuki Miyamoto, Takeo Kageyama, Masataka Ohta, Yasutaka Matsui, Fumio Koyama, "Surfactant effect of Sb for GaInAs quantum dots grown by molecular beam epitaxy", International Symposium on Quantum Dots and Photonic Crystals 2003, Nov., 2003.
Kohroh Kobayashi, "Development and Challange of Semiconductor Lasers for Photonic Networks", Photonics Conference 2003, Photonics Conference 2003, Nov., 2003.
Takeshi Uchida, Tomoyuki Miyamoto, Fumio Koyama, "Analysis of higher-order transverse mode suppression using a convex mirror including thermal lensing effect", 9th MICROOPTICS CONFERENCE, Oct., 2003.
Takeshi Uchida, Tomoyuki Miyamoto, Fumio Koyama, "Transverse-mode control of VCSELs with convex mirror", The 8th OptoElectronics and Communications Conference, Oct., 2003.
Jyunji Kinoshita, Tomoyuki Miyamoto, Yutaka Onishi, Fumio Koyama, "Characterization of single wavelength optically pumped GaInAsP/InP VCSELs with dielectric mirrors", 9th MICROOPTICS CONFERENCE, Oct., 2003.
Takashi Kondo, Masakazu Arai, Tomoyuki Miyamoto, Fumio Koyama, "Highly strained GaInAs/GaAs 1.13µm vertical cavity surface emitting laser with uncooled single mode operation", The 16th Annual Meeting of the IEEE Lasers and Electro-Optics Society, Oct., 2003.
Kohroh Kobayashi, "Disruptive optical technologies for next generation WDM communication", SPIE Proceeding, Vol. 5246, No. 38, pp. 309-316, Sep., 2003.
Fumio Koyama, Masataka Ohta, Takeo Kageyama, Tetsuya Matsuura, Yasutaka Matsui, Tatsuya Furuhata, Tomoyuki Miyamoto, "Sb surfactant effect on highly strained GaInAs/GaAs quantum well grown by molecular beam epitaxy", The 13th International Conference on Molecular Beam Epitaxy 2004, Aug., 2003.
Masao Kawaguchi, Tomoyuki Miyamoto, Shinichiro Kawakami, Atsushi Saito, Fumio Koyama, "Photoluminescence and lasing characteristics of 1.3µm GaInNAs/GaAs strain-compensated quantum wells", 30th International Symposium on Compound Semiconductors, pp. 72-73, Aug., 2003.
Tomoyuki Miyamoto, "Growth and characterization of GaInNAs/GaAs long wavelength lasers", JSPS Colloquium on Photonics, Jun., 2003.
Masakazu Arai, Takashi Kondo, Akihiro Matsutani, Tomoyuki Miyamoto, Fumio Koyama, "Muitiple-wavelength GaInAs/GaAs vertical cavity surface emitting laser array with record wide wavelength span", 61th Annual Device Research Conference, 61th Annual Device Research Conference, pp. 153-154, Jun., 2003.

2002

論文

Kenichi Iga, "Introduction to Nanotechnology", Journal of IEICE, vol. 85, no. 11, pp. 784-787, Nov., 2002.
Masakazu Arai, Takashi Kondo, Akihiro Matsutani, Tomoyuki Miyamoto, Fumio Koyama, "Growth of highly strained GaInAs-GaAs quantum wells on patterned substrate and its application for multiple-wavelength vertical-cavity surface-emitting laser array", IEEE J. Select. Top. Quantum Electron., vol. 8, no. 4, pp. 811-816, Jul., 2002.
Eric Gouardes, Tomoyuki Miyamoto, Masao Kawaguchi, Takashi Kondo, Fumio Koyama, Kenichi Iga, "GaInAs/GaInNAs/GaInAs intermediate layer structure for long wavelength lasers", IEEE Photon. Technol. Lett., vol. 14, no. 7, pp. 896-898, Jul., 2002.
Kenichi Iga, "Vertical-Cavity Surface-Emitting Laser - Progress and Prospects -", Trans. IEICE Transaction on Electronics, vol. E-85-C, no. 1, pp. 10-20, Jun., 2002.
Takashi Kondo, Masakazu Arai, Munechika Azuchi, Takeshi Uchida, Tomoyuki Miyamoto, Fumio Koyama, "Effect of annealing on highly strained GaInAs/GaAs quantum wells", Jpn. J. Appl. Phys., vol. 41, no. 6A, pp. L612-L614, Jun., 2002.

学会発表

Tohru Honda, Kenichi Iga, Hideo Kawanishi, Takahiro Sakaguchi, Fumio Koyama, "Deposition of GaN films on glass substrate and its application to UV electroluminescent devices", Meeting of the Materials Research Society, No. L6.31, 2002.
Tohru Honda, Kenichi Iga, Hideo Kawanishi, Takahiro Sakaguchi, Fumio Koyama, "Deposition of GaN films on glass substrate and its application to UV electroluminescent devices", Meeting of the Materials Research Society(MRS 2002), No. L6.31, 2002.
Fumio Koyama, Tomoyuki Miyamoto, Masakazu Arai, Takashi Kondo, "1200nm highly strained GaInAs/GaAs VCSELs", The 15th Annual Meeting of the IEEE Lasers and Electro-Optics Society, Nov., 2002.
Fumio Koyama, Tomoyuki Miyamoto, "Micro/nano fabrication for surface emitting lasers and optical MEMS", Nano Microprocess Conference, Nov., 2002.
Takashi Kondo, Masakazu Arai, Akihiro Onomura, Tomoyuki Miyamoto, Fumio Koyama, Takashi Kondo, Masakazu Arai, Akihiro Onomura, Tomoyuki Miyamoto, "1.23 μm long wavelength highly strained GaInAs/GaAs quantum well laser", The 15th Annual Meeting of the IEEE Lasers and Electro-Optics Society(LEOS 2002), pp. 618-619, Nov., 2002.
Akihiro Onomura, Masakazu Arai, Takashi Kondo, Akihiro Matsutani, Tomoyuki Miyamoto, Fumio Koyama, "Densely integrated multiple wavelength vertical surface emitting laser array", The 15th Annual Meeting of the IEEE Lasers and Electro-Optics Society, pp. 689-690, Nov., 2002.
Shigeki Makino, Tomoyuki Miyamoto, Masataka Ohta, Tetsuya Matsuura, Yasuhisa Matsui, Fumio Koyama, "Thermal annealing effect on self-assembled GaInNAs/GaAs quantum dots grown by chemical beam epitaxy", 2nd Int. Conf. on Semiconductor Quantum Dots, Sep., 2002.
Shigeki Makino, Tomoyuki Miyamoto, Masataka Ohta, Takeo Kageyama, Yoshihiko Ikenaga, Fumio Koyama, Kenichi Iga, "Growth temperature and nitrogen composition dependence of growth characteristics of GaInNAs/GaAs quantum dots", 12th International Conderence on Molecular Beam EpitaxySeptenber 2002., Sep., 2002.
Tomoyuki Miyamoto, Shigeki Makino, Masao Kawaguchi, Masataka Ohta, Shugo Minobe, Fumio Koyama, "Wavelength elongation of GaInNAs lasers beyond 1.3µm", Physics and Technology of Dilute Nitrides for Optical Communications, Sep., 2002.
Tomoyuki Miyamoto, Fumio Koyama, "Progress of GaInNAs long wavelength lasers", The 2002 Int. Conf. on Solid State Devices and Materials, Sep., 2002.
Masakazu Arai, Takashi Kondo, Akihiro Matsutani, Tomoyuki Miyamoto, Fumio Koyama, "Multiple-wavelength GaInAs/GaAs vertical cavity surface emitting laser array with wavelength span of over 100 nm", IEEE 18th Int. Semiconductor Laser Conf., pp. 9-10, Sep., 2002.
Kohroh Kobayashi, "Recent Trends in Optical Fiber Communications; From High-Capacity to Flexible Networks", 28th European Conference on Optical Communicaiton, Sep., 2002.
Fumio Koyama, Tomoyuki Miyamoto, Kenichi Iga, "Recent progress of surface emitting lasers for high speed photonic networks", SPIE ITCom, Jul., 2002.
Tomoyuki Miyamoto, Fumio Koyama, "Low threshold GaInNAs/GaAs VCSELs", 7th Optoelectronics and Communication Conf., pp. 150-151, Jul., 2002.
Shigeki Makino, Tomoyuki Miyamoto, Takeo Kageyama, Yoshihiko Ikenaga, Masakazu Arai, Fumio Koyama, Kenichi Iga, "Annealing condition and composition dependence of thermal annealing effect on 1.3µm GaInNAs/GaAs quantum well lasers grown by chemical beam epitaxy", European Materials Research Society Spring Meeting, Jun., 2002.
Tomoyuki Miyamoto, Fumio Koyama, "GaInNAs based laser diodes grown by MOVPE", 11th Int. Conf. on Metalorganic Vapor Phase Epitaxy, Jun., 2002.

2001

論文

Kenichi Iga, "Surface emitting laser - its history and prospect", The Review of Laser Eng., vol. 29, no. 12, pp. 768-772, 2001.
Yasuhiko Aoki, Yuji Shimada, Fumio Koyama, Kenichi Iga, "2-Dimensional parallel optical interconnect module formation based on micro-optical bench concept", Trans. IEICE, vol. J84-C, no. 9, pp. 807-813, 2001.
Shigeki Makino, Tomoyuki Miyamoto, Takeo Kageyama, Yoshihiko Ikenaga, Masakazu Arai, Fumio Koyama, Kenichi Iga, "Composition dependence of thermal annealing effect on 1.3μm range GaInNAs/GaAs quantum well lasers grown by chemical beam epitaxy", Jpn. J. Appl. Phys., vol. 40, no. 11B, pp. L1211-L1213, Nov., 2001.
Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Tunnel junction for long-wavelength vertical-cavity surface-emitting lasers", Jpn. J. Appl. Phys., vol. 40, no. 10, pp. 5909-5913, Oct., 2001.
Ayako Murakami, Shigeaki Sekiguchi, Takahiro Sakaguchi, Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Proposal of optically pumped tunable surface emitting laser", Jpn. J. Appl. Phys., vol. 40, no. 9A/B, pp. L935-L936, Sep., 2001.
Miura Toru, Fumio Koyama, Yasuhiko Aoki, Akihiro Matsutani, Kenichiro Iga, "Hollow optical waveguide for temperature-insensitive photonic integrated circuits", Jpn. J. Appl. Phys., Vol. 40, No. 7A, pp. L688-L690, Jul., 2001.
Masao Kawaguchi, Tomoyuki Miyamoto, Eric Gouardes, Dietmar Schlenker, Takashi Kondo, Fumio Koyama, Kenichi Iga, "Lasing characteristics of low-threshold GaInNAs lasers grown by metalorganic chemical vapor deposition", Jpn. J. Appl. Phys., vol. 40, no. 7B, pp. L744-746, Jul., 2001.
Masakazu Arai, Nobuhiko Nishiyama, Munechika Azuchi, Akihiro Matsutani, Fumio Koyama, Kenichi Iga, "Monolithic formation of metal organic chemical vapor deposition grown multi-wavelength vertical cavities with highly strained GaInAs/GaAs quantum wells on GaAs (311)B", Jpn. J. Appl. Phys, Vol. 40, No. 6A, pp. 4056-4057, Jun., 2001.

学会発表

Kenichi Iga, "Surface emitting laser - its histry and prospect -", The Review of Laser Eng., vol. 29, no. 12, pp. 768-772, 2001.
Tomoyuki Miyamoto, Shigeki Makino, Yoshihiko Ikenaga, Takeo Kageyama, Fumio Koyama, Kenichi Iga, "CBE growth of GaInNAs quantum structures for long-wavelength lasers", Int. Narrow Gap Nitride Workshop, p. 15, Oct., 2001.
Yoshihiko Ikenaga, Tomoyuki Miyamoto, Sshigeki Makino, Takeo Kageyama, Masakazu Arai, Fumio Koyama, Kenichi Iga, "1.4µm GaInNAs/GaAs quantum well laser grown by chemical beam epitaxy", 28th Int. Symp. on Compound Semiconductors, Oct., 2001.
Ayako Murakami, Shigeaki Sekiguchi, Takahiro Sakaguchi, Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Design and fabrication of GaInAsP/InP vertical microcavity for optically pumped tunable surface emitting laser", 8th Microoptics Conf., pp. 72-75, Oct., 2001.
Tsukasa Yoshida, Yoshihiko Uchida, Takahiro Sakaguchi, Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Characterization of thin film InGaN/GaN QWs formed by removing a substrate with UV laser irradiation for blue VCSELs", 8th Microoptics Conf. (MOC'01), pp. 76-79, Oct., 2001.
Tsukasa Yoshida, Yoshihiko Uchida, Takahiro Sakaguchi, Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Characterization of thin film InGaN/GaN QWs formed by removing a substrate with UV laser irradiation for blue VCSELs", 8th Microoptics Conf., pp. 76-79, Oct., 2001.
Takeru Amano, Fumio Koyama, Masakazu Arai, Tomoyuki Miyamoto, Kenichi Iga, "Thermal tuning of micromachined vertical cavity filter", 27th European Conf. on Optical Communication, pp. 216-217, Sep., 2001.
Takeru Amano, Fumio Koyama, Masakazu Arai, Tomoyuki Miyamoto, Kenichi Iga, "Thermal wavelength tuning of micromachined GaAlAs/GaAs vertical cavity filter", 2001 IEEE/LEOS International Conference on Optical MEMS, pp. 73-74, Sep., 2001.
Tomoyuki Miyamoto, "GaInNAs/GaAs surface emitting lasers", 2001 Asia-Pacific Radio Science Conference, p. 112, Aug., 2001.
Tomoyuki Miyamoto, Masao Kawaguchi, Eric Gouardes, Takashi Kondo, Fumio Koyama, Kenichi Iga, "Low threshold operation of MOCVD grown GaInNAs lasers with GaInAs intermediate layer inserted QWs", 6th Optoelectronics and Communication Conf., pp. 541-542, Jul., 2001.
Masao Kawaguchi, Tomoyuki Miyamoto, Eric Gouardes, Takashi Kondo, Fumio Koyama, Kenichi Iga, "Low threshold current density operation (J_{th}=340A/cm^{2}) of GaInNAs/GaAs quantum well lasers grown by metalorganic chemical vapor deposition", The Pacific Rim Conf. on Lasers and Electro-Optics 2001, pp. II-596-597, Jul., 2001.
Shigeki Makino, Tomoyuki Miyamoto, Takeo Kageyama Yoshihiko Ikenaga, Nobuhiko Nishiyama, Akihiro Matsutani, Fumio Koyama, Kenichi Iga, "Room temperature continuous-wave operation of GaInNAs/GaAs VCSELs grown by chemical beam epitaxy with output power exceeding 1mW", The Pacific Rim Conf. on Lasers and Electro-Optics 2001, pp. II-608-609, Jul., 2001.

2000

論文

Dietmar Schlenker, Tomoyuki Miyamoto, Zhibiao Chen, Masao Kawaguchi, Takashi Kondo, Eric Gouardes, Fumio Koyama, Kenichi Iga, "Critical layer thickness of 1.2-μm highly strained GaInAs/GaAs quantum wells", J. Crystal Growth, vol. 221, pp. 503-508, 2000.
Nobuhiko Nishiyama, Masakazu Arai, Satoshi Shinada, Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Growth and optical properties of highly strained GaInAs/GaAs quantum wells on (311)B GaAs by MOCVD", J. Crystal Growth, vol. 221, pp. 530-534, 2000.
Masao Kawaguchi, Tomoyuki Miyamoto, Eric Gouardes, Dietmar Schlenker, Takashi Kondo, Fumio Koyama, Kenichi Iga, "Optical quality dependence on growth rate for metalorganic chemical vapor deposition grown GaInNAs/GaAs", Jpn. J. Appl. Phys., vol. 39, no. 12A, pp. L1219-L1220, 2000.
Masao Kawaguchi, Eric Gouardes, Dietmar Schlenker, Takashi Kondo, Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Low threshold current density operation of GaInNAs/GaAs quantum well lasers grown by metalorganic chemical vapour deposition", Electron. Lett., vol. 36, no. 21, pp. 1776-1777, Oct., 2000.
Shunichi Sato, Nobuhiko Nishiyama, Tomoyuki Miyamoto, Takashi Takahashi, Naoto Jikutani, Masakazu Arai, Akihiro Matsutani, Fumio Koyama, Kenichi Iga, "Continuous wave operation of 1.26μm GaInNAs/GaAs vertical-cavity surface-emitting lasers grown by metalorganic chemical vapour deposition", Electron. Lett., vol. 36, no. 24, pp. 2018-2019, Oct., 2000.
Dietmar Schlenker, Tomoyuki Miyamoto, Zhibiao Chen, Masao Kawaguchi, Takashi Kondo, Eric Gouardes, J. Gemmer, C. Gemmer, Fumio Koyama, Kenichi Iga, "Inclusion of strain effect in miscibility gap calculations for III-V semiconductors", Jpn. J. Appl. Phys., vol. 39, no. 10, pp. 5751-5757, Oct., 2000.
Akihiro Matsutani, Hideo Ohtsuki, Fumio Koyama, Kenichi Iga, "Emission Spectrochemical Analysis in Dry Etching Process of InP by Cl2 Inductively Coupled Plasma", Jpn. J. Appl. Phys., Vol. 39, No. 10, pp. 6109-6110, Oct., 2000.
Nobuhiko Nishiyama, Masakazu Arai, Satoshi Shinada, Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "1.15μm lasing operation of highly strained GaInAs/GaAs on GaAs (311)B substrate with high characteristic temperature (T₀=210 K)", Jpn. J. Appl. Phys., vol. 39, no. 10B, pp. L1046-L1047, Oct., 2000.
Masakazu Arai, Nobuhiko Nishiyama, Satoshi Shinada, Akihiro Matsutani, Fumio Koyama, Kenichi Iga, "Highly stable single polarization operation of GaInAs/GaAs vertical-cavity surface-emitting laser on GaAs (311)B substrate under high-speed modulation", Jpn. J. Appl. Phys., Vol. 39, No. 8B, pp. L858-L860, Aug., 2000.
Shigeaki Sekiguchi, Tomoyuki Miyamoto, Tadayoshi Kimura, Gen Okazaki, Fumio Koyama, Kenichi Iga, "Improvement of current injection uniformity and device resistance in long-wavelength vertical-cavity surface-emitting laser using a tunnel junction", Jpn. J. Appl. Phys., vol. 39, no. 7A, pp. 3997-4001, Jul., 2000.
Takeru Amano, Fumio Koyama, Nobuhiko Nishiyama, Kenichi Iga, "2X2 multiwavelength micromachined AlGaAs/GaAs vertical cavity filter array with wavelength control layer", Jpn. J. Appl. Phys., Vol. 39, No. 7A, pp. L673-L674, Jul., 2000.
Masakazu Arai, Nobuhiko Nishiyama, Satoshi Shinada, Fumio Koyama, Kenichi Iga, "AlAs oxidation system with H₂O vaporizer for oxide-confined surface emitting lasers", Jpn. J. Appl. Phys., Vol. 39, No. 6A, pp. 3468-3469, Jun., 2000.
Nobuhiko Nishiyama, Masakazu Arai, Satoshi Shinada, Koichi Suzuki, Fumio Koyama, Kenichi Iga, "Multi-oxide layer structure for single-mode operation in vertical-cavity surface-emitting lasers", IEEE Photon. Technol. Lett., Vol. 12, No. 6, pp. 606-608, Jun., 2000.
Masakazu Arai, Nobuhiko Nishiyama, Satoshi Shinada, Akihiro Matsutani, Fumio Koyama, Kenichi Iga, "Vertical-cavity surface-emitting laser array on GaAs(311)B substrate exhibiting single-transverse mode and stable-polarization operation", Jpn. J. Appl. Phys., Vol. 39, No. 6B, pp. L588-L590, Jun., 2000.

学会発表

Fumio Koyama, Dietmar Schlenker, Nobuhiko Nishiyama, Tomoyuki Miyamoto, Kenichi Iga, "Highly strained GaInAs/GaAs quantum well lasers emitting at 1.2µm wavelength", Frontier Science Research Conf., 2000.
Kenichi Iga, "Surface emitting laser-its birth and generation of new optoelectronics field", IEEE J. Select. Top. Quantum Electron, vol. 6, no. 6, pp. 1201-1215, Nov., 2000.
Masao Kawaguchi, Tomoyuki Miyamoto, Eric Gouardes, Dietmar Schlenker, Takashi Kondo, Fumio Koyama, Kenichi Iga, "Improvement of GaInNAs/GaAs quantum wells by optimizing growth rate in MOCVD", 27th Int. Symp. on Compound Semiconductors, pp. 69-70, Oct., 2000.
Fumio Koyama, Dietmar Schlenker, Tomoyuki Miyamoto, Zhibiao Chen, Takeshi Yamatoya, Takashi Kondo, Kenichi Iga, "1.5W operation of superluminescent diode with highly strained GaInAs/GaAs quantum well emitting at 1.2µm band", 17th Int. Semiconductor Laser Conf., Sep., 2000.
Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "High temperature characteristics of 1.2-1.3µm wavelength lasers on GaAs", 5th Optoelectronics and Communication Conf., pp. 538-539, Jul., 2000.
Shigeki Makino, Tomoyuki Miyamoto, Takeo Kageyama, Fumio Koyama, Kenichi Iga, "GaInNAs/GaAs quantum dots grown by chemical beam epitaxy", 10th Int. Conf. on Metalorganic Vapor Phase Epitaxy, pp. 72-74, Jun., 2000.

1999

論文

Dietmar Schlenker, Tomoyuki Miyamoto, Zhong Pan, Fumio Koyama, Kenichi Iga, "Miscibility gap calculation for Ga_{1-x}In_{x}N_{y}As_{1-y} including strain effects", J. Crystal Growth, vol. 196, pp. 67-70, 1999.
Tomoyuki Miyamoto, Kanji Takeuchi, Takeo Kageyama, Fumio Koyama, Kenichi Iga, "Chemical beam epitaxy of GaInNAs/GaAs quantum wells and its optical absorption property", J. Crystal Growth, vol. 197, pp. 67-72, 1999.
Toshihiko Baba, Kyoji Inoshita, Hiroko Tanaka, Jun Yonekura, Maiko Ariga, Akihiro Matsutani, Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Strong enhancement of light extraction efficiency in GaInAsP 2-D-arranged microcolumns", IEEE J. Lightwave Tech., vol. 17, no. 11, pp. 2113-2120, Nov., 1999.
Satoshi Shinada, Fumio Koyama, Nobuhiko Nishiyama, Masakazu Arai, Kenya GOTO, Kenichi Iga, "Fabrication of micro-aperture surface emitting laser for near field optical data storage", Jpn. J. Appl. Phys., Vol. 38, No. 11B, pp. L198～L200, Nov., 1999.
Zhibiao Chen, Dietmar Schlenker, Tomoyuki Miyamoto, Takashi Kondo, Masao Kawaguchi, Fumio Koyama, Kenichi Iga, "High temperature characteristics of near 1.2μm InGaAs/AlGaAs lasers", Jpn. J. Appl. Phys., vol. 38, no. 10B, pp. L1178-L1179, Oct., 1999.
Shigeaki Sekiguchi, Tomoyuki Miyamoto, Tadayoshi Kimura, Fumio Koyama, Kenichi Iga, "Self-aligned current confinement structure using AlAs/InP tunnel junction in GaInAsP/InP semiconductor lasers", Appl. Phys. Lett., vol. 75, no. 11, pp. 1512-1514, Sep., 1999.
Dietmar Schlenker, Zhong Pan, Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Effect of surface quality on overgrowth of highly strained GaInAs/GaAs quantum wells and improvement by a strained buffer layer", Jpn. J. Appl. Phys., vol. 38, no. 9A, pp. 5023-5027, Sep., 1999.
Dietmar Schlenker, Tomoyuki Miyamoto, Zhibiao Chen, Fumio Koyama, Kenichi Iga, "1.17μm highly strained GaInAs-GaAs quantum-well laser", IEEE Photon. Technol. Lett., vol. 11, no. 8, pp. 946-948, Aug., 1999.
Akihiro Matsutani, Fumio Koyama, Hideo Ohtsuki, Kenichi Iga, "Vertical and Smooth Etching of InP by Cl2/Xe Inductively Coupled Plasma", Jpn. J. Appl. Phys., Vol. 38, No. 7A, pp. 4260-4261, Jul., 1999.
Fumio Koyama, Dietmar Schlenker, Tomoyuki Miyamoto, Zhibiao Chen, Akihiro Matsutani, Takahiro Sakaguchi, Kenichi Iga, "1.2μm highly strained GaInAs/GaAs quantum well lasers for singlemode fibre datalink", Electron. Lett., vol. 35, no. 13, pp. 1079-1081, Jun., 1999.

学会発表

Fumio Koyama, D. Schlenker, Tomoyuki Miyamoto, Z. Chen, Kenichi Iga, "1.2 μm GaInAs/GaAs lasers - Are they useful for high capacity single mode fiber datacom?", SPIE Conf. on Photonics Technology (SPIE Symposium, pp. 290-296, 1999.
Kenichi Iga, Fumio Koyama, Tomoyuki Miyamoto, Dietmar Schlenker, Zhibiao Chen, "High characteristic temperature (T_{0}>150K) 1.2µm GaInAs/GaAs lasers", IEEE Lasers and Electro-Optics Society 1999 Annual Meeting, Nov., 1999.
Fumio Koyama, Kenichi Iga, Tomoyuki Miyamoto, D. Schlenker, "High characteristic temperature (T0>150K) 1.2 mm GaInAs/GaAs lasers", IEEE Lasers and Electro-Optics Society 1999 Annual Meeting (LEOS’99), Nov., 1999.
Kohroh Kobayashi, "Recent Progress of Photonic Device Research", SPIE International Symposium on Photonics and Applications, Nov., 1999.
Zhibiao Chen, Dietmar Schlenker, Fumio Koyama, Tomoyuki Miyamoto, Akihiro Matsutani, Kenichi Iga, "High temperature characteristics of highly strained 1.2 µm InGaAs/GaAs quantum well lasers", 5th Asia Pacific Conference on Communications and 4th Optoelectronics and Communications Conference, pp. 1311-1314, Oct., 1999.
Takeru Amano, Fumio Koyama, N. Furukawa, Nobuhiko Nishiyama, Masakazu Arai, Kenichi Iga, "Micromachined GaAlAs/GaAs vertical cavity filter with adjustable temperature dependence", 5th Asia Pacific Conference on Communications and 4th Optoelectronics and Communications Conference (APCC/OECC'99), 5th Asia Pacific Conf. on Communications and 4th Optoelectronics and Communications Conf. (APCC/OECC’99), Vol. PD, pp. 19-20, Oct., 1999.
Takeo Kageyama, Tomoyuki Miyamoto, Shigeki Makino, Fumio Koyama, Kenichi Iga, "GaInNAs/GaAs quantum well laser grown by chemical beam epitaxy", The 1999 Int. Conf. on Solid State Devices and Materials, Sep., 1999.
Fumio Koyama, Tomoyuki Miyamoto, Z. Chen, Akihiro Matsutani, Takahiro Sakaguchi, Kenichi Iga, "Highly strained GaInAs/GaAs QW for 1.2 μm surface emitting lasers", IEEE/LEOS Summer Topical Meetings,LEOS Summer’99, pp. 23, Sep., 1999.
T. Kageyama, Tomoyuki Miyamoto, S. Makino, Fumio Koyama, Kenichi Iga, "GaInNAs/GaAs quantum well laser grown by chemical beam epitaxy", The 1999 Int. Conf. on Solid State Devices and Materials (SSDM’99), pp. 290-291, Sep., 1999.
Fumio Koyama, D. Schlenker, Tomoyuki Miyamoto, Z. Chen, Akihiro Matsutani, Takahiro Sakaguchi, Kenichi Iga, "2 Gbit/s single-mode fiber data transmission using 1.2 μm heatsink-free GaInAs/GaAs laser for Gbit/s-LAN", 25th European Conf. on Optical Communication (ECOC’99), pp. II-78, Sep., 1999.
Kenichi Iga, Fumio Koyama, "Advances in vertical cavity surface emitting lasers", 18th Int. Commission for Optics (ICO’99), pp. 300-301, Aug., 1999.
Binquan Wang, Tomoyuki Miyamoto, Kenichi Iga, "Optical pattern recognition system based on optical correlator using planar microlens array", 7th Microoptics Conf., Jul., 1999.
Takeo Kageyama, Tomoyuki Miyamoto, Shigeki Makino, Fumio Koyama, Kenichi Iga, "Optical quality of GaNAs and GaInNAs and its dependence on RF cell condition in chemical beam epitaxy", 7th Int. Conf. on Chemical Beam Epitaxy and Related Growth Techniques, ICCBE-7, pp. 113-114, Jul., 1999.
N. Furukawa, Fumio Koyama, Nobuhiko Nishiyama, Masakazu Arai, Tomoyuki Miyamoto, Kenichi Iga, "Micromachined tunable GaAlAs/GaAs DBR for temperature insensitive vertical cavity add/drop filter", 7th Microoptics Conf. , MOC’99, pp. 70-73, Jul., 1999.
Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "CBE and MOCVD growth of GaInNAs", 7th Int. Conf. on Chemical Beam Epitaxy and Related Growth Techniques, ICCBE-7, pp. 97-98, Jul., 1999.

1998

論文

Tomoyuki Miyamoto, Shunichi Sato, Zhong Pan, Dietmar Schlenker, Fumio Koyama, Kenichi Iga, "GaNAs/GaInAs short-period superlattice quantum well structures grown by MOCVD using TBAs and DMHy", J. Crystal Growth, vol. 195, 1998.
Zhong Pan, Tomoyuki Miyamoto, Dietmar Schlenker, Shunichi Sato, Fumio Koyama, Kenichi Iga, "Low temperature growth of GaInNAs/GaAs quantum wells by metalorganic chemical vapor deposition using tertiarybutylarsine", J. Appl. Phys., vol. 84, 1998.
Tohru Honda, Tomoyuki Miyamoto, Takahiro Sakaguchi, Hideo Kawanishi, Fumio Koyama, Kenichi Iga, "Effect of piezo electric field on emission characteristics GaN/AlGaN quantum wells", J. Crystal Growth, vol. 189/190, 1998.
Tohru Honda, Akira Inoue, Miyuki Mori, Tomoe Shirasawa, Noriaki Mochida, Kouji Saotome, Takahiro Sakaguchi, Akira Ohtomo, Masashi Kawasaki, Hideomi Koinuma, Fumio Koyama, Kenichi Iga, "GaN growth on ozonized sapphire(0001) substrates by MOVPE", J. Crystal Growth, Vol. 195, No. 1-4, pp. 319-322, 1998.
Akihiro Matsutani, Fumio Koyama, Kenichi Iga, "Low Bias Voltage Dry Etching of InP by Inductively Coupled Plasma Using SiCl4/Ar", Jpn. J. Appl. Phys., Vol. 37, No. 12A, pp. 6655-6656, 1998.
Chang Kyu Kim, Tomoyuki Miyamoto, Yang Hee Lee, "Design considerations of GaInNAs-GaAs quantum wells: Effects of indium and nitrogen mole fractions", Jpn. J. Appl. Phys., vol. 37, Nov., 1998.
Akihiro Matsutani, Fumio Koyama, Kenichi Iga, "C60 Resist Mask of Electron Beam Lithography for Chlorine-Based Reactive Ion Beam Etching", Jpn. J. Appl. Phys., Vol. 37, No. 7, pp. 4211-4212, Jul., 1998.
Nobuhiko Nishiyama, Akimasa Mizutani, Nobuaki Hatori, Fumio Koyama, Kenichi Iga, "A completely single-mode and single polarization vertical-cavity surface emitting lasers grown on GaAs (311)B substrate", Jpn. J. Appl. Phys., vol. 37, no. 6A, pp. L640-L642, Jul., 1998.

学会発表

Takahiro Sakaguchi, Tomoe Shirasawa, N. Mochida, Akira Inoue, Masatoshi Iwata, Tohru Honda, Fumio Koyama, Kenichi Iga, "Highly reflective AlN/GaN and ZrO2/SiO2 multilayer distributed Bragg reflectors for InGaN/GaN surface emitting lasers", IEEE Lasers and Electro-Optics Society 1998 Annual Meeting, LEOS'98, TuC4, 1998.
Akihiro Matsutani, Fumio Koyama, Kenichi Iga, "Low bias voltage dry etchinG.f InP by inductively coupled plasma (ICP) using SiCl4/A", IEEE Lasers and Electro-Optics Society 1998 Annual Meeting, LEOS'98, WS4, 1998.
Shigeaki Sekiguchi, Tomoyuki Miyamoto, T. Kimura, Fumio Koyama, Kenichi Iga, "Heavy p-type carbon doping to AlAs for InP based optoelectronic devices", IEEE Lasers and Electro-Optics Society 1998 Annual Meeting, LEOS'98, 1998.
Fumio Koyama, Shunichi Sato, Tomoyuki Miyamoto, Kenichi Iga, "Carrier lifetime measurement of long wavelength GaInNAs lasers", IEEE Lasers and Electro-Optics Society 1998 Annual Meeting, 1998.
Tomoyuki Miyamoto, Takeo Kageyama, Schlenker Dietmar, Shigeki Makino, Fumio Koyama, Kenichi Iga, "Comparison of GaInNAs grown by MOCVD and CBE", IEEE Lasers and Electro-Optics Society 1998 Annual Meeting, LEOS'98, 1998.
Koichi Suzuki, Fumio Koyama, Kenichi Iga, "Proposal and design of large-scale GaInAsP/InP arrayed waveguide grating multiplexers with corner reflectors", 1998 OSA Annual Meeting.OSA'98, WKK4, pp. 114, Nov., 1998.
Nobuhiko Nishiyama, A. Mizutani, Nobuaki Hatori, Fumio Koyama, Kenichi Iga, "Single mode and stable polarization InGaAs/GaAs surface emitting laser grown on GaAs(311)B substrate", 16th Int. Semiconductor Laser Conf., ISLC'9, ThA1, Oct., 1998.
N. Ohnoki, Gen Okazaki, Fumio Koyama, Kenichi Iga, "Record high characteristic temperature (T0=122K) in 1.55μm AlGaInAs lasers with AlAs/AlInAs multiple quantum barrier", 16th Int. Semiconductor Laser Conf., ISLC'98, PD-9, Oct., 1998.
Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Progress of vertical cavity surface emitting lasers", 25th Int. Symp. on Compound Semiconductors, Oct., 1998.
Takeo Kageyama, Tomoyuki Miyamoto, Shigeki Makino, Fumio Koyama, Kenichi Iga, "Optical quality improvement and blue-shift of GaInNAs/GaAs quantum well structures by thermal annealing", 25th Int. Symp. on Compound Semiconductors, Oct., 1998.
Dietmar Schlenker, Tomoyuki Miyamoto, Zhong Pan, Fumio Koyama, Kenichi Iga, "Miscibility gap calculation for Ga_{1-x}In_{x}N_{y}As_{1-y} including strain effect", 25th Int. Symp. on Compound Semiconductors, Oct., 1998.
Akira Inoue, Takahiro Sakaguchi, Y. Moriguchi, Tomoyuki Miyamoto, Masatoshi Iwata, Fumio Koyama, Kenichi Iga, "InGaN selective MOCVD growth and polycrystalline formation on SiO2-patterned sapphire substrate", 2nd Int. Symp. on Blue Laser and Light Emitting Diodes, ISBLLED'98, Sep., 1998.
Kenichi Iga, "Surface emitting laser", Trans. IEICE, vol. J81-C-I, no. 9, pp. 483-493, Sep., 1998.
Fumio Koyama, Shigeyuki Inoue, Tomoyuki Miyamoto, Shigeaki Sekiguchi, Kenichi Iga, "Metal-semiconductor-metal photodetectors with strained carrier transport layer", 3rd Optoelectronics and Communication Conf., pp. 358-359, Jul., 1998.
Tomoyuki Miyamoto, Shunichi Sato, Zhong Pan, Dietmar Schlenker, Fumio Koyama, Kenichi Iga, "GaNAs/GaInAs short-period superlattice quantum well structures grown by MOCVD using TBAs and DMHy", 9th Int. Conf. on Metalorganic Vapor Phase Epitaxy, p. 20, May., 1998.

1997

論文

T. H. Loh, Tomoyuki Miyamoto, Takeshi Takada, Fumio Koyama, Kenichi Iga, "Design and characterization of InAsP/InP/GaInP short-period superlattices for long-wavelength multi-quantum barrier grown by chemical beam epitaxy", J. Crystal Growth, vol. 172, 1997.
Tomoyuki Miyamoto, Kanji Takeuchi, Fumio Koyama, Kenichi Iga, "Novel GaInNAs/GaAs quantum well structure for long wavelength semiconductor lasers", IEEE Photon. Technol. Lett., vol. 9, no. 11, Nov., 1997.
Akimasa Mizutani, Nobuaki Hatori, Nobuhiko Nishiyama, Fumio Koyama, Kenichi Iga, "MOCVD grown InGaAs/GaAs vertical cavity surface emitting laser on GaAs (311)B substrate", Electronics Letters, Vol. 33, No. 22, pp. 1877-1878, Oct., 1997.
Akimasa Mizutani, Nobuaki Hatori, Ohnoki, N, Nobuhiko Nishiyama, Ohtake, N, Fumio Koyama, Kenichi Iga, "P-type AlAs growth on a GaAs (311)B substrate using carbon auto-doping for low resistance GaAs/AlAs distributed Bragg reflectors", Japanese Journal of Applied Physics Part 1-Regular Papers Short Notes & Review Papers, Vol. 36, No. 11, pp. 6728-6729, Aug., 1997.
Nobuaki Hatori, Akimasa Mizutani, Nobuhiko Nishiyama, Fumio Koyama, Kenichi Iga, "Threshold reduction of p-type delta-doped InGaAs/GaAs quantum well lasers by using auto-doping of carbon", Electronics Letters, Vol. 33, No. 12, pp. 1096-1097, Jun., 1997.

学会発表

Tohru Honda, Tomoyuki Miyamoto, Takahiro Sakaguchi, Hideo Kawanishi, Fumio Koyama, Kenichi Iga, "Effect of piezo electric field on emission characteristics in GaN/AlGaN quantum well", ICNS'97, 1997.
Tomoyuki Miyamoto, "GaInNAs/GaAs long wavelength VCSELs -- design and expected characteristics --", IEEE Lasers and Electro-Optics Society 1997 Annual Meeting, Nov., 1997.
Kanji Takeuchi, Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Chemical beam epitaxy growth and characterization of Ga(In)NAs/GaAs", The 1997 Int. Conf. on Solid State Devices and Materials, Sep., 1997.
Tomoyuki Miyamoto, Takeshi Takada, Kanji Takeuchi, Fumio Koyama, Kenichi Iga, "A new GaInNAs/GaAs quantum well structure for long wavelength semiconductor lasers", The Pacific Rim Conf. on Lasers and Electro-Optics 1997, Jul., 1997.

1996

学会発表

Satoshi Mitsugi, Fumio Koyama, Akihiro Matsutani, Tomoyuki Miyamoto, Kenichi Iga, "A design of polygonal micro-ring cavities for photonic integrated circuits", IEEE Lasers and Electro-Optics Society 1996 Annual Meeting, Nov., 1996.
F. Vazquez, D. Kobayashi, I. Kobayashi, K. Furuya, Tomoyuki Miyamoto, Takeo Maruyama, Masahiro Watanabe, Masahiro Asada, "Experimental Evidence of Hot Electron Detection with Scanning Hot Electron Microscopy (SHEM)", the 1996 International Conference on Solid State Devices and Materials, Sympo. IV-7, 187-189, Aug., 1996.

1995

論文

Yoichiro Kurita, Noriyuki Yokouchi, Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Refractive index variation in GaInAsP/InP quantum confined structures grown by chemical beam epitaxy", Jpn. J. Appl. Phys., vol. 34, no. 10, Oct., 1995.
T. H. Loh, Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, Kazuhito Furuya, "Study on inelastic scattering effect in unstrained and strain-compensated GaInAs/GaInP multiquantum barriers", Jpn. J. Appl. Phys., vol. 34, no. 8B, Aug., 1995.

学会発表

Fumio Koyama, Kenichi Iga, "Design of ultra-low power optical interconnects using low threshold vertical cavity surface emitting lasers", 1995 OSA Annual Meeting(OSA'95), Sep., 1995.
A. Katsube, T. Honda, Takahiro Sakaguchi, Fumio Koyama, Kenichi Iga, "Design of low threshold GaN-based quantum well surface emitting laser", Topical Workshop on III-V Nitrides(TWIII-VN), p. 8, Sep., 1995.
T. Honda, A. Katsube, Takahiro Sakaguchi, Fumio Koyama, Kenichi Iga, "Design of GaN-based surface emitting laser with low threshold operation", Int. Conf. on Silicon Carbide and Related Materials(ICSCRM-95), Tup-14, pp. 279-280, Sep., 1995.
T. Honda, Takahiro Sakaguchi, Fumio Koyama, Kenichi Iga, K. Inoue, H. Munekata, H. Kukimoto, "Design and fabrication of ZnSe-based blue/green surface emitting lasers", 7th Int. Conf. on II-VI Compounds and Devices(ICII-VICD), Aug., 1995.
Toshihiko Baba, M. Hamasaki, N. Watanabe, Akihiro Matsutani, T. Mukaihara, Fumio Koyama, Kenichi Iga, "A novel short cavity laser with deep grating DBRs", The 1995 Int. Conf. on Solid State Devices and Materials(SSDM'95), Aug., 1995.
Toshihiko Baba, M. Hamasaki, N. Watanabe, Akihiro Matsutani, T. Mukaihara, Fumio Koyama, Kenichi Iga, "A novel short cavity laser with deep grating DBRs", The 1995 Int. Conf. on Solid State Devices and Materials(SSDM'95), Aug., 1995.
Toshihiko Baba, M. Hamasaki, N. Watanabe, Akihiro Matsutani, T. Mukaihara, Fumio Koyama, Kenichi Iga, "A novel short cavity laser with deep grating DBRs", The 1995 Int. Conf. on Solid State Devices and Materials(SSDM'95), Aug., 1995.
Toshihiko Baba, M. Hamasaki, N. Watanabe, Akihiro Matsutani, T. Mukaihara, Fumio Koyama, Kenichi Iga, "A novel short cavity laser with deep grating DBRs", The 1995 Int. Conf. on Solid State Devices and Materials(SSDM'95), Aug., 1995.
Toshihiko Baba, M. Hamasaki, N. Watanabe, Akihiro Matsutani, T. Mukaihara, Fumio Koyama, Kenichi Iga, "A novel short cavity laser with deep grating DBRs", The 1995 Int. Conf. on Solid State Devices and Materials(SSDM'95), Aug., 1995.
Toshihiko Baba, M. Hamasaki, N. Watanabe, Akihiro Matsutani, T. Mukaihara, Fumio Koyama, Kenichi Iga, "A novel short cavity laser with deep grating DBRs", The 1995 Int. Conf. on Solid State Devices and Materials(SSDM'95), Aug., 1995.
Toshihiko Baba, M. Hamasaki, N. Watanabe, Akihiro Matsutani, T. Mukaihara, Fumio Koyama, Kenichi Iga, "A novel short cavity laser with deep grating DBRs", The 1995 Int. Conf. on Solid State Devices and Materials(SSDM'95), Aug., 1995.
Toshihiko Baba, M. Hamasaki, N. Watanabe, Akihiro Matsutani, T. Mukaihara, Fumio Koyama, Kenichi Iga, "A novel short cavity laser with deep grating DBRs", The 1995 Int. Conf. on Solid State Devices and Materials(SSDM'95), Aug., 1995.
Toshihiko Baba, M. Hamasaki, N. Watanabe, Akihiro Matsutani, T. Mukaihara, Fumio Koyama, Kenichi Iga, "A novel short cavity laser with deep grating DBRs", The 1995 Int. Conf. on Solid State Devices and Materials(SSDM'95), Aug., 1995.
Toshihiko Baba, M. Hamasaki, N. Watanabe, Akihiro Matsutani, T. Mukaihara, Fumio Koyama, Kenichi Iga, "A novel short cavity laser with deep grating DBRs", The 1995 Int. Conf. on Solid State Devices and Materials(SSDM'95), Aug., 1995.
N. Hatori, T. Mukaihara, Y. Hayashi, N. Ohnoki, Fumio Koyama, Kenichi Iga, "Design and fabrication of quantum wires for vertical-cavity surface-emitting lasers", The 1995 Int. Conf. on Solid State Devices and Materials(SSDM'95), Aug., 1995.
T. H. Loh, Tomoyuki Miyamoto, Y. Kurita, T. Takada, F. Koyama, K. Iga, "CBE growth of GaInAs/GaInP strain-compensated short-period superlattice to realize strain-compensated multi-quantum barriers", The 56th Autumn Meeting of The Japan Society of Applied Physics, Aug., 1995.
N. Ohnoki, T. Mukaihara, Y. Hayashi, Nobuaki Hatori, Fumio Koyama, Kenichi Iga, "Optical characteristics of Au/GaAs polarizer for controlling surface-emitting laser polarization", The Pacific Rim Conf. on Lasers and Electro-Optics 1995 (CLEO/PR'95), ThC3, Jul., 1995.
T. Mukaihara, N. Ohnoki, Y. Hayashi, Nobuaki Hatori, Fumio Koyama, Kenichi Iga, "Excess intensity noise of vertical-cavity surface-emitting lasers caused by polarization fluctuation", The Pacific Rim Conf. on Lasers and Electro-Optics 1995(CLEO/PR'95), ThC2, Jul., 1995.
Tomoyuki Miyamoto, T. Takada, Y. Kurita, K. Mori, Fumio Koyama, Kenichi Iga, "Design of p-cladding layer for low threshold long-wavelength surface-emitting lasers", The Pacific Rim Conf. on Lasers and Electro-Optics 1995(CLEO/PR'95), Jul., 1995.
T. Honda, K. Inoue, H. Munekata, H. Kukimoto, Fumio Koyama, Kenichi Iga, "ZnSe-based vertical Fabry-Perot cavity for blue surface emitting lasers", The Pacific Rim Conf. on Lasers and Electro-Optics 1995(CLEO/PR'95), pp. 134-135, Jul., 1995.
T. Honda, A. Katsube, T Sakaguchi, Fumio Koyama, Kenichi Iga, "Threshold estimation of GaN-based surface emitting lasers operating in ultraviolet spectral region", Jpn. J. Appl. Phys, vol. 34, pp. 3527-3532, Jul., 1995.

その他

Hiroyuki Uenohara, "A study of multiple quantum well bistable lasers for application to all-optical signal processing", Jul., 1995.

1994

論文

Tomoyuki Miyamoto, Takashi Uchida, Noriyuki Yokouchi, Kenichi Iga, "Surface emitting lasers grown by CBE", J. Crystal Growth, vol. 136, pp. 210-215, 1994.
Yuichi Inaba, Takashi Uchida, Noriyuki Yokouchi, Tomoyuki Miyamoto, Kenichi Mori, Fumio Koyama, Kenichi Iga, "Growth of GaInAs(P)/InP multi-quantum barrier (MQB) by chemical beam epitaxy", J. Crystal Growth, vol. 136, pp. 297-301, 1994.
Noriyuki Yokouchi, Yuichi Inaba, Takashi Uchida, Tomoyuki Miyamoto, Kenichi Mori, Fumio Koyama, Kenichi Iga, "Composition changes in Ga_{x}In_{1-x}As/InP super-lattice growth by chemical beam epitaxy", J. Crystal Growth, vol. 136, pp. 302-305, 1994.
Akihiro Matsutani, Fumio Koyama, Kenichi Iga, "Measurement of Sidewall Roughness of InP Etched by Reactive Ion Beam Etching", Jpn. J. Appl. Phys., Vol. 33, No. 12A, pp. 6737-6738, 1994.
Tomoyuki Miyamoto, Kenichi Mori, Hiroaki Maekawa, Yuichi Inaba, Fumio Koyama, Kenichi Iga, "Carrier transport in p-type GaInAsP/InP distributed Bragg reflectors", Jpn. J. Appl. Phys., vol. 33, no. 8, pp. 4614-4616, Aug., 1994.

学会発表

Fumio Koyama, S. Mitsugi, J. Kato, Akihiro Matsutani, K. Suzuki, T. Mukaihara, Kenichi Iga, "RIBE micro-fabrication of semiconductor photonic devices for micro-photonic integrated circuit", IEEE Lasers and Electro-Optics Society 1994 Annual Meeting, LEOS'94, IO5.2, Nov., 1994.
S. W. Lim, Tohru Honda, K. Yanashima, Fumio Koyama, Hiroshi Kukimoto, Kenichi Iga, "Highly-doped p-ZnSe formation by Li3N diffusion", IEEE Lasers and Electro-Optics Society 1994 Annual Meeting, LEOS'94, OM2.4, pp. 59, Nov., 1994.
T. Mukaihara, N. Ohnoki, Y. Hayashi, Fumio Koyama, Kenichi Iga, "Polarization control of vertical-cavity surface-emitting lasers by a birefringent metal/semiconductor polarizer terminating a distributed Bragg reflector", 14th Int. Semiconductor Laser Conf., ISLC'94, W1.6, Oct., 1994.
T.H. Loh, Tomoyuki Miyamoto, F. Koyama, K. Iga, "Strain-compensated multi-quantum barriers for hot electron leakage reduction in long-wavelength semiconductor lasers", The 55th Autumn Meeting of The Japan Society of Applied Physics, Sep., 1994.
Fumio Koyama, T. Mukaihara, Y. Hayashi, N. Ohnoki, Nobuaki Hatori, Kenichi Iga, "Multi-wavelength vertical cavity surface emitting laser arrays fabricated by nonplanar MOCVD", 20th European Conf. on Optical Communication, ECOC'94, Post deadline paper, pp. 125-127, Sep., 1994.
Fumio Koyama, Toshihiko Baba, Kenichi Iga, "Present status and future prospect of long wavelength surface emitting lasers", 20th European Conf. on Optical Communication, ECOC'94, pp. 333-336, Sep., 1994.
S.Mitsugi, J. Kato, Fumio Koyama, Akihiro Matsutani, T. Mukaihara, Kenichi Iga, "GaInAs/GaAs micro-arc ring semiconductor lasers", The 1994 Int. Conf. on Solid State Devices and Materials, SSDM'94, S-I-10-2, Aug., 1994.
Tomoyuki Miyamoto, Kenichi Mori, Fumio Koyama, Kenichi Iga, "A study on hole transport in p-type GaInAsP/InP multilayer reflectors", The 1994 Int. Conf. on Solid State Devices and Materials, SSDM'94, Aug., 1994.
S. W. Lim, T. Honda, K. Yanashima, K. Inoue, H. Munekata, H. Kukimoto, Fumio Koyama, Kenichi Iga, "Highly conductive p-type ZnSe formation using Li3N diffusion", The 1994 Int. Conf. on Solid State Devices and Materials, SSDM'94, LD4, pp. 967-968, Aug., 1994.
H. Maekawa, T. Mukaihara, M. Araki, Y. Hayashi, N. Ohnoki, Fumio Koyama, Kenichi Iga, "Some performances of InGaAs/GaAlAs surface emitting lasers grown by MOCVD and improvement of p-doping in AlAs", 5th Optoelectronic Conf., OEC'94, 14D3-5, Jul., 1994.
T. Baba, R.h Watanabe, K. Asano, N. Ishibashi, Fumio Koyama, Kenichi Iga, "Observation of photon recycling effect in quasi-closed cavity light emitters", 5th Optoelectronic Conf., OEC'94, 14D4-2, Jul., 1994.
T. Hamano, T. Baba, Fumio Koyama, Kenichi Iga, "Spontaneous emission factors and its inJunection level dependences of Microcavity surface emitting lasers using quantum-films and boxes", 5th Optoelectronic Conf., OEC'94, 14D4-3, pp. 232-233, Jul., 1994.
S. W. Lim, T. Honda, K. Yanashima, K. Inoue, H. Munekata, H. Kukimoto, Fumio Koyama, Kenichi Iga, "Formation of p+-ZnSe contact layer by (Li, N) diffusion for MOCVD-grown II-VI inJunection lasers", 5th Optoelectronic Conf., OEC'94, PDII-5, pp. 24, Jul., 1994.
Akihiro Matsutani, Fumio Koyama, Kenichi Iga, "Measurement of sidewall roughness of InP etched by RIBE", 1994 IEEE/LEOS Summer Topical Meetings, LEOS Summer'91, T1.3,, pp. 26-27, Jul., 1994.
Fumio Koyama, "Present status and new functions of surface emitting lasers", 5th Optoelectronic Conf., OEC'94, 15E2-2, pp. 450-451, Jul., 1994.
T. Mukaihara, N. Ohnoki, Fumio Koyama, Kenichi Iga, "A novel polarization control structure for surface emitting lasers by a birefringent distributed Bragg reflector with a metal/dielectric polarizer", 13th Conf. on Lasers and Electro-Optics, CLEO'94, CMI2, May., 1994.
Fumio Koyama, K. Y. Liou, A. G. Dentai, G. Raybon, C. A. Burrus, "Monolithic integration of GaInAs/GaInAsP strained quantum well DFB laser, electroabsorption modulator and optical amplifier by nonplanar MOVPE", 13th Conf. on Lasers and Electro-Optics, CLEO'94, CWJ4, p. 240, May., 1994.

1993

論文

Takashi Uchida, Noriyuki Yokouchi, Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Some optical characteristics of beryllium-doped InP grown by chemical beam epitaxy (CBE)", J. Crystal Growth, vol. 129, 1993.
T.Baba, Y.Yogo, K.Suzuki, Fumio Koyama, Kenichi Iga, "First Room Temperature CW Operation of GaInAsP/InP Surface Emitting Laser", IEICE Trans. Electronics, vol. E76-C, no. 9, pp. 1423-1424, Sep., 1993.
Takashi Uchida, Tomoyuki Miyamoto, Noriyuki Yokouchi, Yuichi Inaba, Fumio Koyama, Kenichi Iga, "CBE grown 1.5µm GaInAsP-InP surface emitting lasers", IEEE J. Quantum Electron., vol. 29, no. 6, Jul., 1993.

学会発表

T. Tamanuki, M. Kato, Y. Kaneko, H. Maekawa, T. Baba, Fumio Koyama, Kenichi Iga, "Threshold reduction of InGaAs/GaAlAs quantum-well laser using AlAs/GaAs multilayer distributed Bragg reflectors", OFC/IOOC'93, OFC'93, ThB3, 1993.
T. Baba, Y. YoG., K. Suzuki, Fumio Koyama, Kenichi Iga, "Low threshold room temperature pulsed and -31° CW operations of 1.3μm GaInAsP/InP buried heterostructure surface emitting lasers", OFC/IOOC'93, OFC'93, PD28, 1993.
T. Baba, Y. YoG., K. Suzuki, Fumio Koyama, Kenichi Iga, "Room temperature continuous wave lasing characteristics of GaInAsP/InP surface emitting laser", 19th European Conf. on Optical Communication, ECOC'93, 1993.
Yuichi Inaba, Takashi Uchida, Noriyuki Yokouchi, Tomoyuki Miyamoto, Kenichi Mori, Fumio Koyama, Kenichi Iga, "Growth of GaInAs(P)/InP multi-quantum barrier (MQB) by chemical beam epitaxy,", 4th Int. Conf. on Chemical Beam Epitaxy and Related Growth Techniques, ICCBE-4, Jul., 1993.
Noriyuki Yokouchi, Yuichi Inaba, Takashi Uchida, Tomoyuki Miyamoto, Kenichi Mori, Fumio Koyama, Kenichi Iga, "Composition change in GaInAs/InP super-lattice growth by chemical beam epitaxy", 4th Int. Conf. on Chemical Beam Epitaxy and Related Growth Techniques,ICCBE-4, Jul., 1993.

1992

論文

Takashi Uchida, Toshikazu Uchida, Noriyuki Yokouchi, Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Photoluminescence characterization of Ga_{x}In_{1-x}As (0<x<0.32) strained quantum wells grown on InP by chemical beam epitaxy", J. Crystal Growth, vol. 120, 1992.
Noriyuki Yokouchi, Tomoyuki Miyamoto, Takashi Uchida, Yuichi Inaba, Fumio Koyama, Kenichi Iga, "40å continuous tuning of a GaInAsP/InP vertical-cavity surface-emitting laser using an external mirror", IEEE Photon. Technol. Lett., vol. 4, Jul., 1992.
Noriyuki Yokouchi, Takashi Uchida, Tomoyuki Miyamoto, Yuichi Inaba, Fumio Koyama, Kenichi Iga, "An optical absorption property of highly beryllium-doped GaInAsP grown by chemical beam epitaxy", Jpn. J. Appl. Phys., vol. 31, May., 1992.

学会発表

H. Tanobe, M. Oshikiri, M. Araki, Fumio Koyama, Kenichi Iga, "A preliminary study on MG./Si multilayer reflectors for improving thermal conductance in surface emitting lasers", IEEE Lasers and Electro-Optics Society 1992 Annual Meeting, LEOS'92, DLTA12.2, Nov., 1992.
Tomoyuki Miyamoto, Takashi Uchida, Noriyuki Yokouchi, Yuichi Inaba, Fumio Koyama, Kenichi Iga, "A study on gain-resonance matchinG.f CBE grown λ=1.5μm surface emitting lasers", IEEE Lasers and Electro-Optics Society 1992 Annual Meeting, LEOS'92, Nov., 1992.
Takashi Uchida, Tomoyuki Miyamoto, Noriyuki Yokouchi, Yuichi Inaba, Fumio Koyama, Kenichi Iga, "CBE grown 1.5µm GaInAsP/InP surface emitting lasers", 13th Int. Semiconductor Laser Conf., ISLC'92, Sep., 1992.
Noriyuki Yokouchi, Tomoyuki Miyamoto, Takashi Uchida, Yuichi Inaba, Fumio Koyama, Kenichi Iga, "GaInAsP/InP surface emitting laser grown by CBE and wavelength tuning employing external reflector", 24th Int. Conf. on Solid State Devices and Materials,SSDM'92, Aug., 1992.
A. Sasaki, T. Baba, Kenichi Iga, "Put-in microconnectors for alignment-free coupling of optical fiber arrays", IEEE Photon. Technol. Lett., vol. 4, no. 8, pp. 908-910, Aug., 1992.
T. Baba, K. Matsuoka, Fumio Koyama, Kenichi Iga, "Low threshold 1.3µm GaInAsP/InP flat-surface buried heterostructure surface emitting laser", 4th Optoelectronic Conf., OEC'92, 16C2-3, Jul., 1992.
T. Tamanuki, Fumio Koyama, Kenichi Iga, "Consideration on threshold and modulation characteristics of photon-recycled surface emitting lasers", 4th Optoelectronic Conf., OEC'92, 16C2-4, Jul., 1992.
Noriyuki Yokouchi, Takashi Uchida, Tomoyuki Miyamoto, Yuichi Inaba, Fumio Koyama, Kenichi Iga, "Optical absorption measurement of highly beryllium-doped GaInAsP grown by chemical beam epitaxy", 4th Optoelectronic Conf., OEC'92, Jul., 1992.
T. Takagi, Fumio Koyama, Kenichi Iga, "Quantum reflection and tunneling in multi-quantum barrier", 18th Int. Quantum Electron. Conf., IQEC'92, MoE3, Jun., 1992.
S. Kubota, Fumio Koyama, Kenichi Iga, "Low threshold current density operation of a 1.3µm GaInAsP/InP transmission-type surface-emitting laser", 11th Conf. on Lasers and Electro-Optics, CLEO'92, JThD5, May., 1992.

1991

論文

Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Ultra-thin GaAs/InP layer growth by chemical beam epitaxy", J. Electronic Materials, vol. 20, no. 12, 1991.
Akihiro Matsutani, Fumio Koyama, Kenichi Iga, "Reactive Ion Beam Etch of GaInAsP/InP Multilayer and Removal of Damaged Layer by Two-Step Etch", Jpn. J. Appl. Phys., Vol. 30, No. 9A, pp. 2123-2126, Sep., 1991.
Takashi Uchida, Toshikazu Uchida, Noriyuki Yokouchi, Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Beryllium doping for Ga_{0.47}In_{0.53}As/InP quantum wells by chemical beam epitaxy (CBE)", Jpn. J. Appl. Phys., vol. 30, Jul., 1991.
Noriyuki Yokouchi, Toshikazu Uchida, Takashi Uchida, Tomoyuki Miyamoto, Fumio Koyama, Kenichi Iga, "Room-temperature observation of excitonic absorption in Ga_{x}In_{1-x}As/InP (0.2<x<0.47) quantum wells grown by chemical beam epitaxy", Jpn. J. Appl. Phys., vol. 30, May., 1991.

学会発表

M. Oshikiri, Fumio Koyama, Kenichi Iga, "In situ optical thickness monitoring in Si/SiO2multi-layer deposition for GaInAsP/InP surface emitting laser reflectors", IEEE Lasers and Electro-Optics Society 1991 Annual Meeting, LEOS'91, SDL14.5, 1991.
Fumio Koyama, S. Kubota, Kenichi Iga, "GaAlAs/GaAs vertical surface emitting active filter", 13th Topical MeetinG.n Optical Amplifiers and Their Applications, OAA'91, FC2-1, 1991.
Fumio Koyama, S. Kubota, Kenichi Iga, "GaAlAs/GaAs vertical surface emitting active filter", 13th Topical MeetinG.n Optical Amplifiers and Their Applications, OAA'91, FC2-1, 1991.
T. Tamanuki, Fumio Koyama, Kenichi Iga, "Ultimate characteristics of micro-cavity surface emitting lasers", 3rd Microoptics Conf., MOC'91, L20, 1991.
H. Tanobe, T. Tamanuki, T. Uchida, Fumio Koyama, Kenichi Iga, "A new spray wet etch process for micro-cavity GaAs/GaAlAs surface emitting lasers", 3rd Microoptics Conf., MOC'91, L9, 1991.
T. Hamano, T. Baba, Fumio Koyama, Kenichi Iga, "Estimation of spontaneous emission factor and lifetime in microcavity surface emitting lasers", 3rd Microoptics Conf., MOC'91, J4, 1991.
T. Tamanuki, Fumio Koyama, Kenichi Iga, "RIBE and sulfur-passivated regrowth for GaAlAs/ GaAs BH lasers", 1991 IEEE/LEOS Summer Topical Meetings, LEOS Summer'91, TuB.5, 1991.
Kenichi Iga, Fumio Koyama, Akihiro Matsutani, "RIBE and RIE for micro cavity surface emitting lasers-technology and damage characterization", 1991 IEEE/LEOS Summer Topical Meetings, LEOS Summer'91, ThC.1, 1991.
Kenichi Iga, T. Uchida, Fumio Koyama, "CBE growth of lattice matched and strained GaInAs(P)/InP quantum wells and DBRs", 1991 IEEE/LEOS Summer Topical Meetings, LEOS Summer'91, MB.1, 1991.
M. Shimizu, T. Mukaihara, Fumio Koyama, Kenichi Iga, "A polarization control method for surface emitting lasers", 17th European Conf. on Optical Communication, ECOC'91, MoA1-4, 1991.
T. Baba, T. Hamano, Fumio Koyama, Kenichi Iga, "Spontaneous emission factor and lifetime of a microcavity DBR surface emitting laser with quantum wire structures", 10th Conf. on Lasers and Electro-Optics, CLEO'91, JTh-C4, 1991.
T. Takagi, Fumio Koyama, Kenichi Iga, "Design of modified multiple quantum barrier for 600 nm range AlGaInP lasers", 10th Conf. on Lasers and Electro-Optics, CLEO'91, CWP2, 1991.
Akihiro Matsutani, Fumio Koyama, Kenichi Iga, "Micro dry etching process for vertical cavity surface emitting lasers", AmE．an Vacuum Society Series, APCT'91, vol. 10, 227, pp. 112-115, 1991.
T. Tamanuki, T. Tadokoro, K. Morito, Fumio Koyama, Kenichi Iga, "Micro-fabrication techniques for semiconductor lasers", SPIE'91, no. 1361-77, pp. 614-617, 1991.
T. Uchida, Tomoyuki Miyamoto, T. Uchida, N. Yokouchi, Fumio Koyama, Kenichi Iga, "Photoluminescence characterization of GaxIn1-x As (0<x<0.32) strained quantum wells grown on InP by chemical beam epitaxy", 3rd Int. Conf. on Chemical Beam Epitaxy and Related Growth Techniques, ICCBE-3, Sep., 1991.
Toshikazu Uchida, Tomoyuki Miyamoto, Takashi Uchida, Noriyuki Yokouchi, Fumio Koyama, Kenichi Iga, "Photoluminescence characterization of Ga_{x}In_{1-x}As (0<x<0.32) strained quantum wells grown on InP by chemical beam epitaxy", 3rd Int. Conf. on Chemical Beam Epitaxy and Related Growth Techniques, Sep., 1991.
T. Tamanuki, Fumio Koyama, Kenichi Iga, "Surface recombination reduction by (NH4) 2Sx-passivation in MOCVD regrowth for AlGaAs/GaAs BH lasers", 23th Int. Conf. on Solid State Devices and Materials, SSDM'91, PC1-3, Aug., 1991.
T. Takagi, Fumio Koyama, Kenichi Iga, "Electron wave reflection by multi-quantum barrier (MQB) 23th Int. Conf. on Solid State Devices and Materials", 23th Int. Conf. on Solid State Devices and Materials, SSDM'91, C-2-1, Aug., 1991.
Tomoyuki Miyamoto, T. Uchida, Fumio Koyama, Kenichi Iga, "PL study on structure dependence of GaxIn1-xAs/InP strained multi-quantum wells grown by CBE", 23th Int. Conf. on Solid State Devices and Materials, SSDM'91, Aug., 1991.
Tomoyuki Miyamoto, Toshikazu Uchida, Fumio Koyama, Kenichi Iga, "PL study on structure dependence of Ga_{x}In_{1-x}As/InP strained multi-quantum wells grown by CBE", 23th Int. Conf. on Solid State Devices and Materials, Aug., 1991.

1990

論文

E Ho, Fumio Koyama, Kenichi Iga, "Effective reflectivity from self-imaging in a Talbot cavity and its effect on the threshold of a finite 2-D surface emitting laser array", Appl. Opt., vol. 29, no. 34, pp. 5080-5085, 1990.
Toshi K. Uchida, Takashi Uchida, Noriyuki Yokouchi, Fumio Koyama, Kenichi Iga, "Highly beryllium-doped GaInAs grown by chemical beam epitaxy", Japanese Journal of Applied Physics, Vol. 29-2, No. 12, pp. L2146-L2148, 1990.
T. Takagi, Fumio Koyama, Kenichi Iga, "Photoluminescence study of electron wave confinement in multi-quantum barrier (MQB)", J. Appl. Phys, vol. 29, no. 11, pp. 1969-1972, Nov., 1990.
T. Takagi, Fumio Koyama, Kenichi Iga, "Potential barrier height analysis of AlGaInP multi-quantum barrier (MQB", Jpn. J. Appl. Phys., vol. 29, no. 11, pp. 1977-1980, Nov., 1990.
T. Uchida, Noriyuki Yokouchi, Kazuaki Mise, Fumio Koyama, Kenichi Iga, "Cracking yield dependence of InP growth by chemical beam epitaxy", Jpn. J. Appl. Phys, vol. 29, no. 10, pp. 1738-1740, Oct., 1990.
Noriyuki Yokouchi, Fumio Koyama, Kenichi Iga, "Estimation of tunable wavelength range in surface emitting laser using intra-cavity quantum-well tuner", Trans. IEICE, vol. E73, no. 9, pp. 1473-1475, Sep., 1990.
T. Uchida, Kazuaki Mise, Noriyuki Yokouchi, Fumio Koyama, Kenichi Iga, "Growth of Ga0.47In0.53As-InP double-heterostructure wafer by chemical beam epitaxy", Jpn. J. Appl. Phys, vol. 29, no. 9, pp. 1771-1772, Sep., 1990.
T. Uchida, K. Mise, Fumio Koyama, Kenichi Iga, "Extremely high Be doped Ga0.47In0.53As growth by chemical beam epitaxy", J. Crystal Growth, vol. 105, pp. 366-370, Sep., 1990.

学会発表

Kenichi Iga, Fumio Koyama, "Potential performance of surface emitting lasers", IEEE Lasers and Electro-Optics Society 1990 Annual Meeting, LEOS'90, SDL1.1/MKK1, pp. 198, Nov., 1990.
E. Ho, Fumio Koyama, Kenichi Iga, "Close-packed 3×3 surface emitting laser array grown by a two-step MOCVD", IEEE Lasers and Electro-Optics Society 1990 Annual Meeting, LEOS'90, SDL1.6/MKK6, pp. 203, Nov., 1990.
Fumio Koyama, K. Morito, Kenichi Iga, "Consideration on intensity noise of GaAlAs/GaAs surface emitting laser", 12th Int. Semiconductor Laser Conf., ISLC'90, H-5, pp. 116-117, Sep., 1990.
T. Baba, T. Hamano, Fumio Koyama, Kenichi Iga, "Spontaneous emission factor of a microcavity DBR surface emitting laser", 16th European Conf. on Optical Communication, ECOC'90, vol. 3, ThG-1.3, pp. 995-998, Sep., 1990.
T. Uchida, T. Uchida, K. Mise, N. Yokouchi, Fumio Koyama, Kenichi Iga, "GaInAs/InP MQW and DBR growth for surface emitting lasers", 6th Int. Conf. Molecular Beam Epitaxy, ICMBE-6, PIV-21, Aug., 1990.
T. Uchida, T. Uchida, N. Yokouchi, K. Mise, Fumio Koyama, Kenichi Iga, "GaInAs/InP multi-quantum wells and strained super-lattices grown by chemical beam epitaxy", 22th Int. Conf. on Solid State Devices and Materials, SSDM'90, B-4-5, pp. 115-118, Aug., 1990.
Kenichi Iga, Fumio Koyama, "Vertical cavity surface emitting lasers --- Device technology and future prospects ---", 22th Int. Conf. on Solid State Devices and Materials, SSDM'90, D-3-1, pp. 517-520, Aug., 1990.
T. Takagi, Fumio Koyama, Kenichi Iga, "Experimental verification of electron wave confinement by multi-quantum barrier (MQB)", 3rd Optoelectronic Conf., OEC'90, PD-3, pp. 10-11, Jul., 1990.
Fumio Koyama, Kenichi Iga, "Spectral and modulation characteristics of vertical cavity surface emitting laser", 3rd Optoelectronic Conf., OEC'90, 13B1-1, pp. 196-197, Jul., 1990.
M. Shimizu, Fumio Koyama, Kenichi Iga, "BPM analysis for transverse mode stabilization of surface emitting laser", 3rd Optoelectronic Conf., OEC'90, 13B1-5, pp. 204-205, Jul., 1990.

1989

論文

M. Shimizu, Fumio Koyama, Kenichi Iga, "Estimation of diffraction loss in surface emitting laser cavity by beam propagation method", Trans. IEICE, vol. E72, no. 1, pp. 1050-1051, Oct., 1989.
T. Uchida, Fumio Koyama, Kenichi Iga, "Estimation of linewidth for a surface emitting laser with multilayer DBRs", Trans. IEICE, vol. E72, no. 10, pp. 1084-1085, Oct., 1989.
Takashi Tadokoro, Fumio Koyama, Kenichi Iga, "Classification of etching mechanism in reactive ion beam etch,” J. Vac. Sci. Technol", J. Vac. Sci. Technol., vol. B7, no. 5, pp. 1111-1114, Sep., 1989.
Fumio Koyama, Susumu Kinoshita, Kenichi Iga, "Room temperature continuous wave lasing characteristics of a GaAs vertical cavity surface-emitting laser", Appl. Phys. Lett., vol. 55, no. 3, pp. 221-222, Jul., 1989.
Hiroyuki Uenohara, Fumio Koyama, Kenichi Iga, "AlGaAs/GaAs multiquantum well (MQW) surface-emitting laser", Electron. Lett., vol. 25, no. 12, pp. 770-771, Jun., 1989.

学会発表

T. Uchida, T. Uchida, K. Mise, Fumio Koyama, Kenichi Iga, "Extremely high be doped GaInAs grown by chemical beam epitaxy", 2nd Int. Conf. on Chemical Beam Epitaxy and Related Growth Techniques, ICCBE-2, WP-7, 1989.
T. Uchida, K. Mise, T. Uchida, Fumio Koyama, Kenichi Iga, "High rate growth and wide range Be dopinG.f GaInAsP/InP chemical beam epitaxy", APCT'89, P-1, 99-102, 1989.
T. Tadokoro, Fumio Koyama, Kenichi Iga, "Low damage etchinG.f GaInAsP/InP and GaAlAs/GaAs by reactive ion beam etch and removal of residual damages", APCT'89, P-13, pp. 147-150, 1989.
Fumio Koyama, Susumu Kinoshita, Kenichi Iga, "Lasing characteristics of room temperature cw GaAs surface emitting laser", 7th International Conference on Integrated Optics and Optical Fiber Communication, IOOC'89, vol. 1, No. 18B1-2, pp. 20-21, 1989.
E. Ho, Fumio Koyama, Kenichi Iga, "Effective reflectivity and threshold of self-imaged surface emitting laser array", 2nd Microoptics Conf. and 8th Topical MeetinG.n Gradient-Index Optical Systems, MOC/GRIN'89, J2, pp. 242-24, 1989.
Fumio Koyama, Kenichi Iga, "Spectral behavior of vertical cavity surface emitting laser", Second Regional Symp. on Optoelectronics, RSOE'89, MoB-1, pp. 25-28, 1989.
Hiroyuki Uenohara, Fumio Koyama, Kenichi Iga, "AlGaAlAs/GaAs multiquantum well (MQW) surface emitting inJunection laser", 15th European Conf. on Optical Communication, ECOC'89, WeB16-5, pp. 304-307, 1989.
Fumio Koyama, Susumu Kinoshita, Kenichi Iga, "Room temperature cw vertical cavity surface emitting laser and high power 2-D laser array", 8th Conf. on Lasers and Electro-Optics, CLEO'89, FC1, pp. 380, 1989.

1988

論文

Fumio Koyama, Ryo Kinoshita, Kenichi Iga, "Room temperature cw operation of GaAs vertical cavity surface emitting laser", Trans. IEICE, vol. E71, no. 11, pp. 1089-1090, 1988.
Fumio Koyama, S Kinoshita, Kenichi Iga, "Room temperature cw operation of GaAs vertical cavity surface emitting laser", Trans. IEICE of Japan, vol. E71, no. 11, pp. 1089-1090, 1988.
Kenichi Iga, S. Kinoshita, Fumio Koyama, "Recent advances of surface emitting semiconductor lasers", Optoelectronics Device and Technologies, vol. 3, no. 2, pp. 131-142, 1988.
Takahiro Sakaguchi, M. Oshikiri, Fumio Koyama, Kenichi Iga, "TiO/SiO dielectric multilayer reflector for surface emitting semiconductor lasers", Proc. MRS Int'l MeetinG.n Advanced Materials, vol. 10, pp. 243-251, 1988.
Kohroh Kobayashi, I. Mito, "Single Frequency and Tunable Semiconductor Laser Diodes", IEEE J. Lightwave Tech., Vol. LT-6, No. 11, pp. 1623-1633, Nov., 1988.
Kenichi Iga, Fumio Koyama, S. Kinoshita, "Surface emitting lasers", Trans. IEICE, vol. J71-C, no. 11, pp. 1493-1500, Nov., 1988.
J. Nitta, Fumio Koyama, Kenichi Iga, "Pulse operation of GaAs/AlGaAs surface-emitting-laser-type optical threshold device", Trans. IEICE, vol. J71-C, no. 9, pp. 1267-1273, Sep., 1988.
M. Shimizu, Fumio Koyama, Kenichi Iga, "Polarization characteristics of MOCVD grown GaAs/GaAlAs CBH surface emitting lasers", Jpn. J. Appl. Phys, vol. 27, no. 9, pp. 1774-1775, Sep., 1988.
Takahiro Sakaguchi, Fumio Koyama, Kenichi Iga, "Vertical cavity surface emitting laser with AlGaAs/AlAs Bragg reflector", Electronics Letter, Vol. 24, No. 15, pp. 928-929, Aug., 1988.
H. Kawasaki, Fumio Koyama, Kenichi Iga, "Improvement of a flat surface circular buried heterostructure GaInAsP/InP surface emitting laser", Jpn. J. Appl. Phys., vol. 27, no. 8, pp. 1548-1549, Aug., 1988.

学会発表

Kenichi Iga, Fumio Koyama, S. Kinoshita, "Surface emitting semiconductor laser array - its advantage and future", 35th National Symposium of the AmE．an Vacuum Society, EM-FrM6, 1988.
T Sakaguchi, Fumio Koyama, Kenichi Iga, "Vertical cavity surface emitting laser with an AlGaAs/AiAs Bragg reflector", Electron Lett., vol. 24, no. 5, pp. 928-929, 1988.
Fumio Koyama, S. Kinoshita, Kenichi Iga, "Room temperature cw operation of GaAs vertical cavity surface emitting laser", 2nd Optoelectronic Conf., OEC'88, PD-4, pp. 8-9, Oct., 1988.
Fumio Koyama, Kenichi Iga, "Frequency chirping in external modulators", IEEE J. Quantum Electron, vol. QE24, no. 9, pp. 1845-1855, Sep., 1988.
Kenichi Iga, Fumio Koyama, S. Kinoshita, "Surface emitting semiconductor lasers", IEEE J. Quantum Electron., vol. QE-24, no. 9, pp. 1845-1855, Sep., 1988.
Kenichi Iga, Fumio Koyama, S Kinoshita, "Surface emitting semiconductor lasers", IEEE J. Quantum Electron, vol. QE24, no. 9, pp. 1845-1855, Sep., 1988.
Takahiro Sakaguchi, Fumio Koyama, Kenichi Iga, "A vertical cavity GaAs/AlAs DBR surface emitting laser and its lasing characteristics", 11th Int. Semiconductor Laser Conf., ISLC'88, N-1, pp. 162-163, Aug., 1988.
M. Oshikiri, H. Kawasaki, Fumio Koyama, Kenichi Iga, "Reflectivity dependence of threshold current in GaInAsP/InP surface emitting laser", 16th Int. Quantum Electron. Conf., IQEC'88, PD-22, Jul., 1988.
Takahiro Sakaguchi, M. Oshikiri, Fumio Koyama, Kenichi Iga, "TiO2 (or Si)/SiO2 dielectric multilayer reflector for surface emitting semiconductor lasers", Int. MeetinG.n Advanced Materials, K4.6, May., 1988.

1987

論文

I. Watanabe, Fumio Koyama, Kenichi Iga, "GaInAsP/InP CBH surface emitting laser with a dielectric multilayer reflector", Jpn. J. Appl. Phys., vol. 26, no. 9, pp. 1598-1599, Sep., 1987.
Fumio Koyama, Hiroyuki Uenohara, Takahiro Sakaguchi, Kenichi Iga, "GaAlAs/GaAs MOCVD growth for Surface Emitting Laser", Jpn. J. Appl. Phys., Vol. 26, No. 7, pp. 1077-1081, Jul., 1987.

学会発表

Kenichi Iga, S. Kinoshita, Fumio Koyama, "Overview of the progress in surface emitting lasers", pical Conference on Compound Semiconductor Growth, rocessing and Devices for 1990's Gainesville, pp. 341-359, Oct., 1987.
Kenichi Iga, Fumio Koyama, S. Kinoshita, "Surface emitting lasers and related electrooptic application", 13th European Conf. on Optical Communication, ECOC'87, pp. 3-10, Sep., 1987.
I. Watanabe, Fumio Koyama, Kenichi Iga, "77K CW operation (Ith=15mA) of GaInAsP/InP CBH surface-emitting laser", 13th European Conf. on Optical Communication, ECOC'87, pp. 31-34, Sep., 1987.

1986

論文

I. Watanabe, Fumio Koyama, Kenichi Iga, "Low temperature CW operation of GaInAsP/InP surface emitting laser with circular buried heterostructure", Electron. Lett, vol. 22, no. 25, pp. 1325－1327, 1986.
Kenichi Iga, Hiroyuki Uenohara, Fumio Koyama, "Electron reflectance of multiquantum Barrier (MQB)", Electron. Lett, vol. 22, no. 19, pp. 1008－1010, Sep., 1986.

学会発表

Kenichi Iga, , Fumio Koyama, "Micro-cavity GaAlAs/GaAs surface emitting laser with Ith = 6mA", ISLC'86, PD-4, Oct., 1986.
Kenichi Iga, Hiroyuki Uenohara, Fumio Koyama, "Electron reflectance of multiquantum Barrier (MQB)", Electron. Lett, vol. 22, no. 19, pp. 1008-1010, Sep., 1986.
Fumio Koyama, H. Segawa, A Nakamura, Takahiro Sakaguchi, Kenichi Iga, "MOCVD growth and characterization of GaAlAs/GaAs multi-heterostructure for surface emitting laser", 12th European Conf. on Optical Communication, ECOC'86, pp. 97-100, Sep., 1986.
Fumio Koyama, H. Segawa, S. Kinoshita, Hiroyuki Uenohara, Takahiro Sakaguchi, A.Nakamura, Kenichi Iga, "GaAlAs/GaAs MOCVD growth device and materials", 18th Int. Conf. on Solid State Devices and Materials, SSDM'86, C-9-3, pp. 757-758, Aug., 1986.

1985

論文

Kohroh Kobayashi, I. Mito, "High Light Output Power Single-Longitudinal-Mode Semiconductor Laser Diodes", IEEE J. Lightwave Tech., Vol. LT-3, No. 6, pp. 1202-1210, 1985.
Fumio Koyama, Kenichi Iga, "Frequency chirping of external modulation and its reduction", Electron. Lett., vol. 21, no. 23, pp. 1065-1066, Nov., 1985.

学会発表

Kenichi Iga, "Modulation limit of semiconductor lasers by some parametric modulation schemes", Trans. IECE of Japan, vol. 68, no. 7, pp. 417-420, Oct., 1985.

1984

論文

Fumio Koyama, K. Sekartedjo, B. Broberg, Kazuhito Furuya, Y. Suematsu, "Active distributed reflector laser phase adjusted by groove region", The Japanese Journal of Applied Physics, Vol. 23, No. 10, pp. L791-L794, Oct., 1984.
M. Kitamura, M.Yamaguchi, S. Murata, I.Mito, Kohroh Kobayashi, "High Performance Single-Longitudinal-Mode Operation of InGaAsP/InP DFB-DC-PBH LDs", IEEE J. Lightwave Tech., Vol. LT-2, No. 4, pp. 363-369, Aug., 1984.

1983

論文

Fumio Koyama, Y Suematsu, Shigehisa Arai, T. Tanbun-Ek, "1.5-1.6 μm GaInAsP/InP dynamic-single-mode (DSM) lasers with distributed Bragg reflector", IEEE J.Quantum Electron, vol. QE-19, no. 6, pp. 1042-1051, Jun., 1983.

学会発表

H Soda, Y Motegi, Kenichi Iga, "GaInAsP/InP surface emitting injection lasers with short cavity length", IEEE J. Quantum Electron, vol. QE-19, no. 6, pp. 1035-1041, Jun., 1983.

1981

論文

Fumio Koyama, Shigehisa Arai, Y Suematsu, K. Kishino, "Dynamic spectral width of rapidly modulated 1.58μm GaInAsP/InP buried-heterostructure distributed-Bragg-reflector integrated-twin-guide lasers", Electron. Lett, vol. 17, no. 25, pp. 938-940, 1981.
T. Tanbun-Ek, Shigehisa Arai, Fumio Koyama, K. Kishino, S. Yoshizawa, T. Watanabe, Y. Suematsu, "Low threshold current CW operation of GaInAsP/InP buried heterostructure distributed Bragg-reflector integrated-twin-guide laser emitting at 1.5-1.6μm", Electron. Lett., vol. 17, no. 25, pp. 967-968, 1981.

1980

学会発表

Kenichi Iga, M. A. Pollack, B. I. Miller, R. J. Martin, "GaInAsP/InP DH lasers with a chemically etched facet", IEEE J. of Quant. Elect, vol. QE-16, no. 10, pp. 1044-1047, Oct., 1980.
Kenichi Iga, B. I. Miller, "C.W. operation of GaInAsP/InP laser with chemically etched mirror", Electron. Lett., vol. 16, no. 22, pp. 830-832, Oct., 1980.
L. A. Coldren, Kenichi Iga, B. I. Miller, J. A. Rentschler, "Integrated GaInAsP/InP laser formed by reactive-ion-etching", 38th Annual Device Research Conference, vol. IVB-5, Jun., 1980.

1979

学会発表

H Soda, Kenichi Iga, C Kitahara, Y Suematsu, "GaInAsP/InP surface emitting injection lasers", Jpn. J. Appl. Phys., vol. 18, no. 12, pp. 2329-2330, 1979.
Kenichi Iga, T. Kambayashi, K. Wakao, C Kitahara, K. Moriki, "GaInAsP/InP Double-heterostructure planar LED's", IEEE Trans. on Electron Devices, vol. ED-26, no. 8, pp. 1227-1230, Aug., 1979.
Kenichi Iga, T. Kambayashi, K. Wakao, K. Moriki, C Kitahara, "GaInAsP/InP DH Lasers and Related Fabrication Techniques for Integration", IEEE J. of Quantum Electron., vol. QE-26, no. 8, pp. 707-710, Aug., 1979.

1978

学会発表

Y. Takahashi, Kenichi Iga, "An analysis on single wavelength oscillation of semiconductor laser at high speed pulse modulation", Trans. IECE of Japan, vol. E61, no. 9, pp. 685-689, Sep., 1978.
Kenichi Iga, Y. Kokubun, "Formulas for calculating the refractive index profile of optical fibers from their transverse interference patterns", Appl. Opt., vol. 17, no. 12, pp. 1972-1974, Jun., 1978.

1977

学会発表

Y. Itaya, Y Suematsu, Kenichi Iga, "Carrier life measurement of GaInAsP/InP double-heterostructure lasers", Japan. J. Appl. Phys., vol. 16, no. 6, pp. 1057-1058, Jun., 1977.

1966

学会発表

Y Suematsu, Kenichi Iga, S. Ito, "A light beam waveguide using hyperbolic-type gas lens", IEEE Trans. MTT, vol. MTT-14, no. 12, pp. 657-665, 1966.
Y. Suematsu, Kenichi Iga, "Mode conversion of optical beam transmission systems", IECE of Japan, vol. 49, no. 9, pp. 59-66, Sep., 1966.