Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Masanobu Okayasu"'
Autor:
Shigehisa Tanaka, Masahiro Aoki, Toshiki Sugawara, Shinji Tsuji, Hiroki Irie, Masato Shishikura, Masanobu Okayasu, Tatsuya Saito
Publikováno v:
Optical Fiber Communication Conference.
Recent challenges facing research and development on high-speed optical and electrical devices, and their integration for 100GbE are explained. The prospects regarding low-power-consumption technology and optical and electrical integration technology
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95141346469f4d8b83d6c40fd7f35f2f
https://doi.org/10.1364/ofc.2010.oths4
https://doi.org/10.1364/ofc.2010.oths4
Autor:
Mitsuo Fukuda, Masanobu Okayasu
Publikováno v:
Journal of Applied Physics. 72:2119-2124
A reliability study has been made on 0.98 μm InGaAs/GaAs strained quantum well ridge waveguide lasers for pumping erbium‐doped fiber optical amplifiers (EDFAs). Analysis of a constant power long‐term aging test over 104 h shows that the degradat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d67135c0f61142e1872f7faefdd05b06
https://doi.org/10.1063/1.351599
https://doi.org/10.1063/1.351599
Publikováno v:
Journal of Solid State Chemistry. 99:166-172
In order to make clear the phase relationships and nonstoichiometry of the SrFeO2.5 SrFeO3 system at elevated temperatures, measurements were made using high-temperature gravimetry and high-temperature powder X-ray diffraction (XRD) analysis under th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab66f301185ee154bc4f4af974fd187d
https://doi.org/10.1016/0022-4596(92)90301-b
https://doi.org/10.1016/0022-4596(92)90301-b
Autor:
Yong Lee, Toshiki Sugawara, Reiko Mita, Hiroaki Inoue, Hiroshi Yamamoto, Shigehisa Tanaka, Masanobu Okayasu, Masahiro Aoki, Hisashi Takamatsu, Takashi Toyonaka, Michihide Sasada, Yasunobu Matsuoka, Shinji Tsuji, Shigeki Makino, Hiroaki Hayashi, Kazuyuki Nagatsuma, Masato Shishikura, Takuma Ban
Publikováno v:
Optical Fiber Communication Conference and National Fiber Optic Engineers Conference.
We developed a high-speed (over 30 GHz) and high-responsivity (nearly 0.8 A/W) back-illuminated PD with a newly developed high reflective reflector, and successfully demonstrated an error free 25-Gbps 10-km SMF transmission.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::824eb2608dc3ab5a1aba20338e909047
https://doi.org/10.1364/nfoec.2009.jtha28
https://doi.org/10.1364/nfoec.2009.jtha28
Autor:
Shigehisa Tanaka, Kazuhiko Naoe, Takeshi Kitatani, Noriko Sasada, Masanobu Okayasu, Kazunori Shinoda, Masahiro Hirai, Hiroshi Yamamoto, Kenta Nogawa, Shigeki Makino, Osamu Kagaya
Publikováno v:
Optical Fiber Communication Conference and National Fiber Optic Engineers Conference.
We first report a low power consumption (under 0.18 W) and a wide temperatur range (−5 to 75 °C) operation of 1.55-μm un-cooled EA/DFB-LD coaxial-type TOSA in 10-Gbit/s 40-km transmission.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db2f83283fd4497d5a1cda070cda1b9d
https://doi.org/10.1364/ofc.2009.otht5
https://doi.org/10.1364/ofc.2009.otht5
Publikováno v:
Journal of Applied Physics. 69:8346-8351
Aging tests were carried out on as‐cleaved InGaAs/GaAs strained quantum‐well ridge waveguide lasers. Although the lasers have immunity to sudden failure and have degradation rate as low as 2×10−5 h−1, after over 6000 h of operation, they rea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd18ea8e6f31a2cd91b69cae23a067fb
https://doi.org/10.1063/1.347396
https://doi.org/10.1063/1.347396
Autor:
Masanobu Okayasu, Kenichi Iga, Masayuki Izutsu, Satoki Kawanishi, Osamu Ishida, Setsuko Murata, Hitoshi Kawaguchi, Toshihiko Baba
Publikováno v:
The Review of Laser Engineering. 19:668-695
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb08e51ba7b2494694e3d0e90a5eb8f3
https://doi.org/10.2184/lsj.19.7_668
https://doi.org/10.2184/lsj.19.7_668
Publikováno v:
Electronics and Communications in Japan (Part II: Electronics). 74:68-74
The 0.98-μm InGaAs strained quantum well (QW) lasers have been fabricated. In these lasers, improvement in laser performances such as low threshold characteristic and applicability as a pumping source of Er-doped fiber optical amplifiers are expecte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de36886211bd1e6683afc68fd0aa3c41
https://doi.org/10.1002/ecjb.4420740208
https://doi.org/10.1002/ecjb.4420740208
Publikováno v:
Electronics and Communications in Japan (Part II: Electronics). 74:19-31
The noise characteristics of the Er3+-doped optical fiber amplifier pumped by laser diodes (LD) at 0.98 μm and 1.48 μm are theoretically and experimentally studied. The noise figures of the optical fiber amplifiers pumped by a 0.98–μm band LD an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6bcd55707f0452b29669190eec08794
https://doi.org/10.1002/ecjb.4420741003
https://doi.org/10.1002/ecjb.4420741003
Publikováno v:
Photonic Switching.
Loss-less 4 X 4 monolithic LD optical matrix switches have been made for the first time using InGaAs/GaAs strained single quantum-well GRIN-SCH wafers. The switching speed of this switch is 0.2 ns.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4c3992d5e61bc9f4076d2d7c9388bc9
https://doi.org/10.1117/12.147939
https://doi.org/10.1117/12.147939