Zobrazeno 1 - 10
of 140
pro vyhledávání: '"Yuichi Tohmori"'
Publikováno v:
IEEE Transactions on Electron Devices. 54:456-461
The degradation behavior of 1.5-mum uncooled distributed feedback (DFB) lasers with a semi-insulating buried heterostructure during constant-power aging is investigated. Long-term stability is achieved by suppressing the t0.5 deterioration in the cur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f4df647fc7ee586713b5ffb0fd37aaf
https://doi.org/10.1109/ted.2006.890367
https://doi.org/10.1109/ted.2006.890367
Autor:
Yukihiro Hirota, Tsuyoshi Ito, Yoshifumi Muramoto, Tadao Ishibashi, Yuichi Tohmori, Tatsuya Takeshita, Hiroshi Ito
Publikováno v:
IEEE Transactions on Electron Devices. 53:1567-1574
The degradation behavior of avalanche photodiodes (APDs) with a mesa structure during bias-temperature aging is investigated. The dark-current variation using the optical-beam-induced current (OBIC) imaging technique is analyzed. A rise in the induce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::493d950358e8567e01d2f7e24f374eb9
https://doi.org/10.1109/ted.2006.875820
https://doi.org/10.1109/ted.2006.875820
Publikováno v:
Journal of Lightwave Technology. 24:2347-2354
A wavelength channel data rewriter (WCDR) is a device that erases the data on an incoming signal by utilizing the saturation characteristic of a semiconductor optical amplifier (SOA) and then modulates it with new data to generate an upstream signal.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27b0397092d1e2d7de7ebc4a260f483a
https://doi.org/10.1109/jlt.2006.875193
https://doi.org/10.1109/jlt.2006.875193
Autor:
Yuichi Tohmori, Yasuo Shibata, Takaaki Kakitsuka, Hideo Sugiura, Masayuki Itoh, Yoshiaki Kadota
Publikováno v:
Journal of Lightwave Technology. 24:1478-1485
Fundamental amplifying characteristics of 1.55-mum semiconductor optical amplifiers (SOAs) that contain multiquantum well (MQW) active layers with an optimized tensile strain or bulk active layers with various tensile strains were investigated. Both
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7b56767873f707db0357c05f1d63ada
https://doi.org/10.1109/jlt.2005.863298
https://doi.org/10.1109/jlt.2005.863298
Publikováno v:
IEEE Transactions on Electron Devices. 53:211-217
The mechanisms that cause the sudden failure of InGaAs/GaAs strained-layer quantum-well lasers (LD) are analyzed by monitoring an optical beam-induced current (OBIC). Statistically, the LDs that suddenly fail have different n-OBIC/sub ridge/ intensit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::682636764b27dadee7b18286d4b0d5c3
https://doi.org/10.1109/ted.2005.862238
https://doi.org/10.1109/ted.2005.862238
Autor:
Yasuhiro Kondo, Yoshihiro Kawaguchi, Yuzo Yoshikuni, Nobuhiro Kikuchi, Hiroshi Okamoto, Hiroshi Yasaka, Naoki Fujiwara, Takaaki Kakitsuka, Yuichi Tohmori
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 11:939-944
The mode-hop-free tuning range is increased to 6.0 nm by using the self-phase adjustment effect in a short-active-region distributed Bragg reflector laser. The optical power is more than 1 mW for the whole tuning range, and the maximum power is great
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b21790624bb83c9b63f61b2b484d9e2c
https://doi.org/10.1109/jstqe.2005.854149
https://doi.org/10.1109/jstqe.2005.854149
Publikováno v:
IEICE Transactions on Electronics. :960-966
We have developed a traveling-wave optical modulator using an n-i-n heterostructure fabricated on an InP substrate. The modulation characteristics are studied theoretically and experimentally. We obtained an extremely small n voltage (V π ) of 2.2 V
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::858ac25d69c307886c89cd5413e76eb9
https://doi.org/10.1093/ietele/e88-c.5.960
https://doi.org/10.1093/ietele/e88-c.5.960
Publikováno v:
Electronics and Communications in Japan (Part II: Electronics). 88:1-9
High-speed, small-driving-voltage phase modulator is developed introducing an n-i-n heterostructure in semiconductor layers. A Mach-Zehnder modulator with an electrode length of 3 mm is fabricated with this phase modulator, and we confirmed 100-km si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::025acc515dad8f136a299c5cafbd9cf4
https://doi.org/10.1002/ecjb.20175
https://doi.org/10.1002/ecjb.20175
Autor:
I. Ogawa, Tsuyoshi Ito, Ryoichi Kasahara, Yasuyuki Inoue, Katsuaki Magari, Yuichi Tohmori, M. Okamoto, Rieko Sato, Yasuhiro Suzuki
Publikováno v:
Journal of Lightwave Technology. 22:1331-1337
We achieved successful low-input-power (-10 dBm) wavelength conversion at 10 Gb/s by using a hybrid integrated cross-phase modulation wavelength converter (XPM-WC). The input CW power was also -10 dBm and the total current was only 215 mA, and no sig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bf05edab381d5e3f3a523b20507cfd04
https://doi.org/10.1109/jlt.2004.827673
https://doi.org/10.1109/jlt.2004.827673
Autor:
Yuichi Tohmori, Masashi Abe, Yoshinori Hibino, Ryoichi Kasahara, T. Tanaka, Toshikazu Hashimoto
Publikováno v:
Journal of Lightwave Technology. 22:567-573
We have successfully fabricated a 100-GHz spacing 8-channel light source using hybrid integration technologies based on planar lightwave circuits (PLCs). The light source was composed of UV-written Bragg gratings and laser diode (LDs) on PLC platform
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::910fcab29544d944d12ff0c214765d2d
https://doi.org/10.1109/jlt.2004.824382
https://doi.org/10.1109/jlt.2004.824382