Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Toshitaka Aoyagi"'
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 15:612-617
An InGaAsP single-mode laser diode (LD) highly tolerant to optical feedback was realized utilizing a partially corrugated grating with a window-mirror structure. The length and the coupling coefficient of the grating were properly chosen to enable mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6e51ca3287d505024ab0c617403dfd6
https://doi.org/10.1109/jstqe.2009.2013358
https://doi.org/10.1109/jstqe.2009.2013358
Autor:
Yasunori Miyazaki, Toshiharu Miyahara, Toshitaka Aoyagi, Kazuhisa Takagi, Kiichi Yoshiara, Tetsuya Nishimura, Yasunori Tokuda, Tatsuo Hatta, Mitsunobu Gotoda, Satoshi Nishikawa, Keisuke Matsumoto
Publikováno v:
Japanese Journal of Applied Physics. 47:3493-3498
Three-electrode-type self-pulsating (SP) distributed feedback (DFB) laser diodes (LDs), which can recover an optical clock pulse sequence by injecting external signals, were investigated. Numerical simulations revealed that the matching relations of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b8930194e2f45e4b535e875a4a5e7bae
https://doi.org/10.1143/jjap.47.3493
https://doi.org/10.1143/jjap.47.3493
Autor:
Toshitaka Aoyagi, Eiji Yagyu, Masaharu Nakaji, S. Ihara, Takahide Ishikawa, Eitaro Ishimura, Yasunori Tokuda, Kiichi Yoshiara
Publikováno v:
Journal of Lightwave Technology. 25:3686-3693
This paper presents the high reliability of the guardring-free planar InAlAs avalanche photodiode (APD) and its degradation mode analysis. We have conducted long-term and high-temperature aging tests under 175degC, 200degC, 225degC, and 250degC. Ther
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9be0bac6427721b81d691127c56b1ef3
https://doi.org/10.1109/jlt.2007.909357
https://doi.org/10.1109/jlt.2007.909357
Autor:
Kazuhisa Takagi, Yasunori Miyazaki, Toshitaka Aoyagi, Tatsuo Hatta, Toshiharu Miyahara, Satoshi Nishikawa, Kuniaki Motoshima, Keisuke Matsumoto
Publikováno v:
IEICE Transactions on Electronics. :1118-1123
The design aspects of the bulk InGaAsP semiconductor optical amplifier integrated Mach-Zehnder interferometer (SOA-MZI) optimized for 40 Gbps-NRZ all optical wavelength conversion are described. The dimensions of the SOA active waveguide have been op
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19daeeb70c5a2920531371465f4d821c
https://doi.org/10.1093/ietele/e90-c.5.1118
https://doi.org/10.1093/ietele/e90-c.5.1118
Autor:
T. Hatta, Toshiharu Miyahara, Keisuke Matsumoto, Toshitaka Aoyagi, Akihiro Maruta, Ken-ichi Kitayama, Y. Miyazaki, K. Takagi, Ken Mishina, Kuniaki Motoshima
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 13:32-39
A polarization-insensitive monolithic 40-Gbps semiconductor optical amplifier (SOA)-Mach-Zehnder interferometer wavelength converter has been developed. Based on the photon-electron rate equation, we optimized the dimensions of the waveguide structur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb69207f45703a8e2979d5af5181bfa8
https://doi.org/10.1109/jstqe.2006.889048
https://doi.org/10.1109/jstqe.2006.889048
Autor:
Keisuke Matsumoto, Satoshi Nishikawa, Tetsuya Nishimura, Toshiharu Miyahara, Mitsunobu Gotoda, Tatsuo Hatta, Yasunori Tokuda, Toshitaka Aoyagi, Kazuhisa Takagi
Publikováno v:
Japanese Journal of Applied Physics. 45:3457-3461
Distributed feedback (DFB) self-pulsating lasers (SP-LDs) and a monolithically integrated semiconductor-optical-amplifier (SOA)-based Mach–Zehnder interferometer (SOA-MZI) were fabricated. Frequency-selective pulsation at 10 and 40 GHz was demonstr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ffcf894cd22b05bcd2c819f1d415537
https://doi.org/10.1143/jjap.45.3457
https://doi.org/10.1143/jjap.45.3457
Autor:
Kazuhisa Takagi, Y. Miyazaki, Hitoshi Tada, Shinya Tokizaki, Y. Mitsui, Y. Hanamaki, Toshitaka Aoyagi
Publikováno v:
IEEE Journal of Quantum Electronics. 39:1009-1017
A small-chirp 40-Gbps electroabsorption modulator (EAM) with high optical output power capability has been developed for the first time. An optimized tensile-strained asymmetric quantum-well structure is employed as the absorption layer of the EAM so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e0c044820b97e2e166340557f4a2dd9
https://doi.org/10.1109/jqe.2003.814370
https://doi.org/10.1109/jqe.2003.814370
Publikováno v:
IEEE Journal of Quantum Electronics. 39:813-819
A small-chirp 40-Gbps electroabsorption modulator (EAM) with a novel tensile-strained asymmetric quantum-well (QW) absorption layer has been demonstrated for the first time. The strain and the band line-up of the asymmetric QW structure were designed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1203f2c8b7b985c640a4a3638fcaabce
https://doi.org/10.1109/jqe.2003.811593
https://doi.org/10.1109/jqe.2003.811593
Autor:
Masayoshi Takemi, Yasunori Miyazaki, Toshitaka Aoyagi, Hitoshi Tada, Yoshihiko Hanamaki, Kazuhisa Takagi, Yasuo Mitsui, Yutaka Mihashi
Publikováno v:
Journal of Applied Physics. 93:3823-3826
Beryllium (Be) has been applied as an acceptor in the p-type cladding layer and the contact layer of an InGaAsP-based electroabsorption modulator (EAM) fabricated by metalorganic chemical vapor deposition (MOCVD). The concentration of diffused dopant
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6ec3df2079da3e08b13c646ff95ce33
https://doi.org/10.1063/1.1559004
https://doi.org/10.1063/1.1559004
Autor:
T. Takiguchi, Eitaro Ishimura, K. Shimizu, T. Mizuochi, Kenichi Matsumoto, Toshitaka Aoyagi, M. Noda, Hitoshi Tada, Y. Miyazaki, T. Nishimura, Etsuji Omura
Publikováno v:
IEEE Journal of Quantum Electronics. 36:909-915
The separate-confinement heterostructure (SCH) of an electroabsorption modulator integrated with a distributed feedback laser diode (EAM-LD) was optimized to obtain a clear optical waveform (eye opening) without penalty of chirp characteristics. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e46fb54f6159367b5a9d1bcb8d7a44a1
https://doi.org/10.1109/3.853539
https://doi.org/10.1109/3.853539