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Dive into the research topics where Tetsuya Uda is active.

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Featured researches published by Tetsuya Uda.


optical fiber communication conference | 2012

Polarization-multiplexed 32QAM and 16PSK signaling with coherent receiver using digital-delay detection

Nobuhiko Kikuchi; Shinya Sasaki; Tetsuya Uda

Application of digital-delay detection to considerably higher-order coherent multilevel signaling is verified by 100-Gbit/s PM-32QAM and 80-Gbit/s PM-16PSK transmission experiments with low implementation penalty, and their laser linewidth and IF-frequency offset tolerance is also shown.


Optical Amplifiers and their Applications (1999), paper WC6 | 1999

Evaluation of System Outage Probability Induced by PMD (Polarized Mode Dispersion) in Optical Amplified Fiber Transmission Systems

Nobuhiko Kikuchi; Sinya Sasaki; Tetsuya Uda; Shigehiro Takashima

In high-speed/long-distance optical transmission systems with optical amplifiers, polarization mode dispersion (PMD) is one of the serious degradation factors giving constraint on the bit rate and the transmission distance, becoming especially important as the bit rate increases higher than 2.5 Gbit/s.


Archive | 2008

Optical transmission apparatus and control method therefor

Tetsuya Uda; Kenta Noda; Yasuhiro Uchiyama; Hiroshi Masuda; Hiroyuki Nakano


Archive | 2007

Optical transmission system for substantially equalizing the output signal level among frequency bands and substantially lowering the signal-to-noise ratio

Tetsuya Uda; Hiroshi Masuda; Hirofumi Nakano; Eita Miyasaka; Satoshi Asamizu


Archive | 2007

Wavelength division multiplexing optical transmission equipment and method of amplifying optical wavelength division multiplexed signals

Tetsuya Uda; Shigehiro Takashima; Shigenori Hayase; Yoshimasa Kusano; Satoshi Asamizu; Hirofumi Nakano


Archive | 2003

Optical transmission equipment with dispersion compensation, and dispersion compensating method

Tetsuya Uda


Archive | 2012

Optical communication module and optical fiber communication system

Riu Hirai; Nobuhiko Kikuchi; Tetsuya Uda; Shinya Sasaki


Archive | 2006

Optical transmission device equipped with pluggable variable optical attenuator

Hiroyuki Nakano; Tetsuya Uda; Yasuhiro Uchiyama


Archive | 2001

Optical transmitter for compensating inter-wavelength level deviation and optical sn deviation

Hitoshi Asamizu; Hiroshi Masuda; Eita Miyasaka; Hirobumi Nakano; Tetsuya Uda; 博文 中野; 宏 増田; 哲也 宇田; 英太 宮坂; 仁 浅水


Archive | 2005

Optical transmission equipment for suppressing a four wave mixing and optical transmission system

Tetsuya Uda; Ryoichi Miyake; Takeshi Nakada; Yoshimasa Kusano; Elichirou Takizawa

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Chihiro Hiraiwa

Sumitomo Electric Industries

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Donglin Han

Sumitomo Electric Industries

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