发明名称 |
Ultrahigh-speed clock extraction circuit |
摘要 |
In an ultrahigh-speed clock extraction circuit wherein a local pulse generating light source 22 for generating a local optical pulse stream synchronized in bit phase with an input optical signal pulse stream is placed in a phase-locked loop, when repetition frequencies of the input optical signal pulse stream and the local optical pulse stream bear a particular relationship, a frequency demultiplier 32 and multipliers 43 and 52 are set so that the frequency of a modulation signal for an optical modulator 41 and a frequency which is a natural-number multiple of the modulation signal frequency, and the frequency of a down-converted version of an optical pulse stream output from a photodetector 42 differ from each other.
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申请公布号 |
US7024122(B2) |
申请公布日期 |
2006.04.04 |
申请号 |
US20020285525 |
申请日期 |
2002.11.01 |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
UCHIYAMA KENTARO;TAKARA HIDEHIKO;YAMADA EIICHI;HASHIMOTO ETSU;MORIOKA TOSHIO |
分类号 |
G02F2/00;H04B10/00;H03L7/06;H03L7/08;H03L7/18;H04J14/02;H04L7/00;H04L7/033;H04L29/12 |
主分类号 |
G02F2/00 |
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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