发明名称 |
Optical transmitter and optical transmission system |
摘要 |
The present invention suppresses to a minimum the degradation of the transmission quality caused by chromatic dispersion characteristic of an optical transmission medium, and the interplay between the chromatic dispersion and non-linear optical effects in dense WDM transport systems. A baseband input data signal is pre-coded in advance by a pre-coding unit, phase modulation is carried out using a pre-coded signal by the optical phase modulating unit, and the phase modulated optical signal is converted to an RZ intensity modulated signal by the optical filter unit that performs phase-shift-keying to amplitude-shift-keying conversion. For example, an optical phase modulating unit generates an encoded DPSK phase modulated signal using a differential phase shirt keying (DPSK) format, and a phase modulated signal is converted to an RZ intensity modulated signal by the optical filter unit disposed downstream of the optical phase modulating unit.
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申请公布号 |
US2003002121(A1) |
申请公布日期 |
2003.01.02 |
申请号 |
US20020185407 |
申请日期 |
2002.06.26 |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
MIYAMOTO YUTAKA;HIRANO AKIRA;KUWAHARA SHOICHIRO;TOMIZAWA MASAHITO |
分类号 |
G02F1/01;H04B10/00;H04B10/02;H04B10/04;H04B10/06;H04B10/142;H04B10/152;H04B10/155;H04B10/18;(IPC1-7):H04B10/04 |
主分类号 |
G02F1/01 |
代理机构 |
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主权项 |
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地址 |
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