Koichi Akahane
National Institute of Information and Communications Technology
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Koichi Akahane.
european conference on optical communication | 2017
Takahide Sakamoto; Toshimasa Umezawa; Guo-Wei Lu; Koichi Akahane; Atsushi Matsumoto; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi
We propose and demonstrate spatial coherent matched detection using two-dimensional high-speed photodiode array. Capturing amplitude and phase distribution, all tributaries of 3×20-Gb/s MDM-QPSK are simultaneously demultiplexed and coherently demodulated without using optical modal fan-out devices.
The Japan Society of Applied Physics | 2013
Koichi Akahane; Naokatsu Yamamoto; Toshimasa Umezawa; Atsushi Kanno; Tetsuya Kawanishi
A semiconductor optical amplifier was fabricated by incorporating highly stacked InAs quantum dots (QDs) as gain media. Twenty InAs QD layers were successfully stacked through the strain-compensation technique, without any deterioration of crystal quality. A wide-range 1.55 μm band gain was observed. The maximum gain reached 15 dB at 1510 nm when the input power was below -20 dBm.
conference on lasers and electro optics | 2013
Toshimasa Umezawa; Koichi Akahane; Atsushi Kanno; Tetsuya Kawanishi
The Japan Society of Applied Physics | 2017
Boqi Qiu; Ya Zhang; Suguru Hosono; Koichi Akahane; Naomi Nagai; Kazuhiko Hirakawa
The Japan Society of Applied Physics | 2017
Hideo Teramoto; Ryota Jomen; Yuki Nakamura; Yoshiaki Ajima; Pan Dai; Shulong Lu; Koichi Akahane; Shiro Uchida
The Japan Society of Applied Physics | 2017
Shine Matsui; Yota Akashi; Shohei Isawa; Atsushi Matsumoto; Koichi Akahane; Yuichi Matsushima; Hiroshi Ishikawa; Katsuyuki Utaka
The Japan Society of Applied Physics | 2016
Shine Matsui; Yota Akashi; Atsushi Matsumoto; Koichi Akahane; Yuichi Matsushima; Hiroshi Ishikawa; Katsuyuki Utaka
The Japan Society of Applied Physics | 2016
Shine Matsui; Yuki Takei; Atsushi Matsumoto; Koichi Akahane; Yuichi Matsushima; Hiroshi Ishikawa; Katsuyuki Utaka
The Japan Society of Applied Physics | 2012
Y. Yoshioka; Naokatsu Yamamoto; Koichi Akahane; Tetsuya Kawanishi; M. Kuroda; Hiroshi Takai
The Japan Society of Applied Physics | 2011
Naokatsu Yamamoto; Koichi Akahane; Tetsuya Kawanishi; Y. Yoshioka; Hiroshi Takai
Collaboration
Dive into the Koichi Akahane's collaboration.
National Institute of Information and Communications Technology
View shared research outputs
National Institute of Information and Communications Technology
View shared research outputs
National Institute of Information and Communications Technology
View shared research outputs
National Institute of Information and Communications Technology
View shared research outputs
National Institute of Information and Communications Technology
View shared research outputs
National Institute of Advanced Industrial Science and Technology
View shared research outputs