发明名称 |
Optical device, optical modulation method, and optical transmitter |
摘要 |
An optical modulation device including waveform shapers that waveform-shape input data signals in synchronism with a rising or falling timing based on comparison with a reference level of an input clock signal, a multi-level phase modulator that generates a multi-level-phase-modulated optical signal based on the data signals waveform-shaped by the plurality of waveform shapers, and outputs the generated optical signal, and a level ratio controller that varies a relative level ratio of the reference level to an amplitude level of the clock signal input to the waveform shapers, based on the optical signal output from the multi-level phase modulator.
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申请公布号 |
US8565617(B2) |
申请公布日期 |
2013.10.22 |
申请号 |
US20080219860 |
申请日期 |
2008.07.29 |
申请人 |
NISHIHARA MASATO;TAKAHARA TOMOO;TANAKA TOSHIKI;FUJITSU LIMITED |
发明人 |
NISHIHARA MASATO;TAKAHARA TOMOO;TANAKA TOSHIKI |
分类号 |
H04B0010/000004 |
主分类号 |
H04B0010/000004 |
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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