"²–ì—El,’·’J•”_ˆê,¬ŽR“ñŽO•v","MEMS ‚ð—p‚¢‚½—˜“¾’Ç]Œ^–Ê”­ŒõƒŒ[ƒU‚Ì’ñˆÄ",,"‘æ56‰ñ‰ž—p•¨—ŠwŠÖŒW˜A‡u‰‰‰ï",,," 1p-G-12",,2009,Mar. "‹g“c ,â“ü Œ’,’·’J•” _ˆê,•½–ì ‹,âŒû F_,¬ŽR “ñŽO•v,¼ŽR L•F,–ì ‰Ô¹—é,Π߉¶","ƒuƒ‰ƒbƒN”½ŽË‹¾“±’pƒfƒoƒCƒX‚̃Xƒ[ƒ‰ƒCƒg“`”À‚Ì•]‰¿",,"‘æ56‰ñ‰ž—p•¨—ŠwŠÖŒW˜A‡u‰‰‰ï",,," 2a-B-7","p. 1245",2009,Mar. "Akihiro Imamura,Koichi Hasebe,Akihiro Matsutani,Fumio Koyama","Tapered hollow waveguide multiplexer for multi-wavelength VCSEL array","Photonics West 2009, IPRM2009",,,," 7229-15",,2009,Jan. "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",2008,Nov. "Xiaoxue Zhao,Koich 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",2008,Sept. "Koichi Hasebe,XiaoUe Zhao,Takahiro Sakaguchi,Fumio Koyama,Connie Chang-Hasnain,Nobuhiko Nishiyama,Cathrine Caneau,Chung-en Zah","Bandwidth Enhancement with Tunable Optical Equalizer for High Speed Intensity Modulation","CLEO 2008","2008 Conference on Lasers and Electro-Optics & Quantum Electronics and Laser Science Conference, Vols 1-9",,,,"pp. 430-431",2008,May "Koichi Hasebe,Xiauxue Zhao,Fumio Koyama,Connie J. Chang-Hasnain,Catherine Caneau,Chung-En Zah","Bandwidth enhancement with tunable optical equalizer for directly modulated VCSELs",,"The 55th Spring Meeting of JSAP",,," 30a-ZQ-4",,2008,Mar. "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",,2007,Sept. "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 ƒÊm InP-based VCSEL with thermally-actuated cantilever structure","20th International Semiconductor Laser Conference","20th International Semiconductor Laser Conference",,," PD1.1",,2006,Sept. "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",2006,Aug. "Koichi Hasebe,Fumio Koyama,Nobuhiko Nishiyama,Catherine Caneau,Chung-En Zah","All-optical Polarization Controller Using Elliptical-Apertured 1.5ƒÊm VCSEL","Conference on Lasers and Electro-OpticsiCLEO 2006j","Conference on Lasers and Electro-Optics, CLEO 2006",,," CWP1",,2006,May "Koichi Hasebe,Fumio Koyama","All-optical signal processing based on optical injection-locked two-mode vertical-cavity surface-emitting laser","Photonics West Optoelectronics 2006, IPRM2006","Photonics West Optoelectronics 2006, IPRM2006",,," 6115-36",,2006,Jan. "’·’J•”_ˆê,‘å¼—T,¬ŽR“ñŽO•v","–Ê”­ŒõƒŒ[ƒU\‘¢‚ð—p‚¢‚½‚‘¬•Î”g–ʧŒä‘fŽq‚Ì“®ì‰ðÍ",,,,"vol. J88-C","no. 12","pp. 1190-1197",2005,Dec. "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",2005,July "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",2005,June "Koichi Hasebe,Yutaka Onishi,Fumio Koyama","Novel polarization controller based on injection-locked vertical-cavity surface-emitting laser",,"IEICE ELEX",,"vol. 2","no. 8","pp. 274-279",2005,May