K
Koji Akimoto
Researcher at Nippon Telegraph and Telephone
Publications - 18
Citations - 282
Koji Akimoto is an academic researcher from Nippon Telegraph and Telephone. The author has contributed to research in topics: Optical switch & Optical cross-connect. The author has an hindex of 10, co-authored 18 publications receiving 281 citations.
Papers
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Journal ArticleDOI
A WDM-based optical access network for wide-area gigabit access services
Jun-ichi Kani,Mitsuhiro Teshima,Koji Akimoto,Noboru Takachio,Hiro Suzuki,Katsumi Iwatsuki,M. Ishii +6 more
TL;DR: A WDM-based access network that directly connects end users over a wide area to the center node and provides guaranteed full-duplex Gigabit Ethernet access services to each of over 100 users is proposed and demonstrated.
Patent
Optical communication system, optical communication unit, and optical transceiving package
TL;DR: In this article, the authors proposed using spectrum-sliced modulated broadband light for transmitting upstream signals instead of using laser light in an optical communication system, which is applicable to wavelength-division multiplexing systems.
Journal ArticleDOI
Super-dense WDM transmission of spectrum-sliced incoherent light for wide-area access network
TL;DR: In this article, a detailed study on super-dense wavelength division multiplexing (WDM) transmission of spectrum-sliced incoherent light used for a wide-area access network is presented.
Patent
Optical modulating device
TL;DR: In this article, an optical modulation apparatus is provided which implements a stable amplifying function by reducing the effect of reflected light rays form end faces of a bidirectional optical amplifier by imposing a numerical limitation on the relationship between the gain of the optical amplifier and the loss of optical modulator.
Patent
Multiple-wavelength optical modulation circuit and wavelength-multiplexing optical signal transmission apparatus
Koji Akimoto,Katsuhiro Araya,Fujiwara Masamitsu,Katsumi Iwatsuki,Jun-ichi Kani,Shingo Kawai,Hiroo Suzuki,Noboru Takachio,Mitsuhiro Tejima,淳一 可児,岩月 勝美,光啓 手島,伸悟 河合,浩司 秋本,克寛 荒谷,正満 藤原,裕生 鈴木,昇 高知尾 +17 more
TL;DR: In this paper, a demultiplex multiple wavelength light having bandwidths more than the free spectral range (FSR) of an arrayed-waveguide grating (AWG) into individual wavelength channels, and suppress power level deviation between each wavelength channels is considered.