发明名称 |
DIRECT MODULATION PHASE-SHIFT-KEYING SYSTEM AND METHOD |
摘要 |
A direct modulation PSK system and method, in a coherent optical fiber transmission system, in which an injection current supplied to a laser diode is adapted to be directly varied is disclosed. In this system or method, a modulating current pulse is superposed on a bias current for the laser diode so that a specified phase condition may be satisfied. Thereby, a differential coding circuit and an external modulator being indispensable for a DPSK system become unnecessary and, in addition, the system becomes less susceptible to the influence of wavelength dispersion than the DPSK system and able to reproduce the carrier.
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申请公布号 |
CA2019178(C) |
申请公布日期 |
1994.05.24 |
申请号 |
CA19902019178 |
申请日期 |
1990.06.18 |
申请人 |
FUJITSU LIMITED |
发明人 |
NAITO, TAKAO;CHIKAMA, TERUMI;WATANABE, SHIGEKI;KIYONAGA, TETSUYA;ONAKA, HIROSHI;ONODA, YOSHIHITO |
分类号 |
H01S3/10;H04B10/04;H04B10/06;H04B10/142;H04B10/145;H04B10/148;H04B10/152;H04B10/155;H04L27/20;H04L27/22;H04L27/227;H04L27/233;(IPC1-7):H04B10/04;H04L27/18 |
主分类号 |
H01S3/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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