发明申请
- 专利标题: Duobinary optical transmission device using at least one semiconductor optical amplifier
- 专利标题(中): 使用至少一个半导体光放大器的二元光传输装置
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申请号: US10849070申请日: 2004-05-19
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公开(公告)号: US20050047797A1公开(公告)日: 2005-03-03
- 发明人: Han-Lim Lee , Gyu-Woong Lee , Yun-Je Oh , Seong-Taek Hwang
- 申请人: Han-Lim Lee , Gyu-Woong Lee , Yun-Je Oh , Seong-Taek Hwang
- 优先权: KR2003-59537 20030827
- 主分类号: H01S5/50
- IPC分类号: H01S5/50 ; H04B10/25 ; H04B10/2507 ; H04B10/516 ; H04B10/556 ; H04B10/588 ; H04B10/61 ; H04B10/04
摘要:
A duobinary optical transmission device provides duobinary optical transmission with improved quality by a technique that does not require an electrical low pass filter LPF.A duobinary optical transmission device includes at least one semiconductor optical amplifier (SOA). A light source outputs a carrier wave as an optical signal. A precoder encodes an input of a non-return-to-zero (NRZ) electrical signal. An interferometer type semiconductor optical amplification unit modulates the carrier wave according to a change of an applied bias current coupled to the encoded signal. An optical band pass filter (OBPF) receives the phase-modulated optical signal from the semiconductor optical amplification unit, filters the received phase-modulated optical signal according to a designated band, and outputs an optical duobinary signal.