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川原啓輔 研究業績一覧 (17件)
論文
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馬場俊彦,
川原啓輔.
光電融合設計による小型高性能マッハ・ツェンダー光変調器,
光学,
vol. 54,
no. 4,
pp. 134-138,
Apr. 2025.
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Keisuke Kawahara,
Toshihiko Baba.
Electro-Optic Co-Simulation in High-Speed Silicon Photonics Transceiver Design Using Standard Electronic Circuit Simulator,
IEEE Journal of Microwaves,
2025.
公式リンク
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Keisuke Kawahara,
Tai Tsuchizawa,
Noritsugu Yamamoto,
Yuriko Maegami,
Koji Yamada,
Shinsuke Hara,
Toshihiko Baba.
High-speed, low-voltage, low-bit-energy silicon photonic crystal slow-light modulator with impedance-engineered distributed electrodes,
Optica,
Sept. 2024.
公式リンク
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Keisuke Kawahara,
Yohtaro Umeda,
Kyoya Takano,
Shinsuke Hara.
A 0.0058-mm2 Inductor-Less CMOS Active Balun With Gain and Phase Errors Within −0.1 ± 0.2 dB and −0.18 ± 1.17° From DC to 8 GHz,
IEEE Transactions on Circuits and Systems I: Regular Papers,
June 2023.
公式リンク
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Keisuke Kawahara,
Joe Sawada,
Takumi Kamo,
Yohtaro Umeda,
Kyoya Takano,
Shinsuke Hara.
Bandwidth Tripler: Broadband Signal Generation With an Image-Rejection Analog Multiplexer for Fiber Optic Transmitters,
IEEE Transactions on Microwave Theory and Techniques,
Jan. 2023.
公式リンク
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Keisuke KAWAHARA,
Yohtaro UMEDA,
Kyoya TAKANO,
Shinsuke HARA.
A Compact Fully-Differential Distributed Amplifier With Coupled Inductors in 0.18-μm CMOS Technology,
IEICE Transactions on Electronics,
2023.
公式リンク
国際会議発表 (査読有り)
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Keisuke Kawahara,
Tai Tsuchizawa,
Noritsugu Yamamoto,
Yuriko Maegami,
Koji Yamada,
Shinsuke Hara,
Toshihiko Baba.
Optical Transmitter with Silicon Slow-Light Modulator and BiCMOS Current-Mode Driver Achieving 0.78 pJ/bit Total Bit Energy,
OECC/PSC 2025,
July 2025.
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Keisuke Kawahara,
Toshihiko Baba.
Accurate EO co-simulation of Si photonics using a standard electronic circuit simulator,
Smart Photonic and Optoelectronic Integrated Circuits 2025,
Mar. 2025.
公式リンク
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Keisuke Kawahara,
Toshihiko Baba.
DAC- and DSP-Free Optical Transmitter Based on Triple-Parallel Si Mach-Zehnder Modulators,
2024 IEEE Silicon Photonics Conference (SiPhotonics),
Apr. 2024.
公式リンク
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Kawahara, Keisuke,
Tsuchizawa, Tai,
Yamamoto, Noritsugu,
Maegami, Yuriko,
Yamada, Koji,
Hara, Shinsuke,
Baba, Toshihiko,
Keisuke Kawahara.
1.9-pJ/bit 0.5-mm2 High-Speed Optical Transmitter including Silicon Slow-Light Modulator and Current-Mode BiCMOS Driver,
ECOC 2024; 50th European Conference on Optical Communication,
pp. 778-781,
2024.
公式リンク
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Keisuke Kawahara,
Tai Tsuchizawa,
Noritsugu Yamamoto,
Yuriko Maegami,
Koji Yamada,
Toshihiko Baba.
59-fJ/bit Si Photonic Crystal Slow-Light Modulator with FinFET-Compatible Driving Voltage,
Optical Fiber Communication Conference (OFC) 2024,
2024.
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Keisuke Kawahara,
Toshihiko Baba.
Modeling of Si Rib and Photonic Crystal Mach-Zehnder Modulators for Electro-Optic Co-Simulation up to 64 Gbaud,
2023 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO),
Aug. 2023.
公式リンク
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Keisuke Kawahara,
Keisuke Kawahara,
Joe Sawada,
Takumi Kamo,
Yohtaro Umeda,
Kyoya Takano.
A 50 Gbps 49 mW CMOS Analog Multiplexer for a DAC Bandwidth Tripler,
2022 IEEE Radio and Wireless Symposium (RWS),
Jan. 2022.
公式リンク
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Keisuke Kawahara,
Keisuke Kawahara,
Yohtaro Umeda,
Kyoya Takano.
A Broadband Active Balun with Inductor-Less Active Peaking and Imbalance Correction,
2021 IEEE International Midwest Symposium on Circuits and Systems (MWSCAS),
Aug. 2021.
公式リンク
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Keisuke Kawahara,
Keisuke Kawahara,
Yohtaro Umeda,
Kyoya Takano.
Design of an Area-Efficient Differential Distributed Amplifier Based on the Theory of Differential Transmission Lines,
2021 IEEE International Symposium on Circuits and Systems (ISCAS),
May 2021.
公式リンク
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Keisuke Kawahara,
Keisuke Kawahara,
Yohtaro Umeda,
Kyoya Takano.
40 Gbps 180 nm CMOS Modulator Driver Using Loss Compensation Gain Cells,
2020 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT),
Sept. 2020.
公式リンク
国内会議発表 (査読なし・不明)
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