发明名称 |
Optical transmitting device |
摘要 |
A demultiplex unit demultiplexes the optical output of a Mach-Zehnder optical modulator and inputs the demultiplexed optical output to a wavelength detection unit. The wavelength detection unit detects the wavelength deviations in the ascending or descending part of the optical signal and inputs the wavelength deviations to a detection unit. The detection unit detects the sign and magnitude of chirping in the magnitude of wavelength deviation and inputs the sign and magnitude of chirping to a driving voltage control unit. The driving voltage control unit compares the detected sign and amount of chirping with the target sign and magnitude of chirping, and a driving voltage generation circuit provides the Mach-Zehnder optical modulator with a suitable driving voltage.
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申请公布号 |
US7245837(B2) |
申请公布日期 |
2007.07.17 |
申请号 |
US20030368346 |
申请日期 |
2003.02.20 |
申请人 |
FUJITSU LIMITED |
发明人 |
SAKAMOTO HISAYA;YAMAZAKI TORU;TASHIRO RUMIKO |
分类号 |
H04B10/02;H04B10/12;H04B10/155;H04B10/18 |
主分类号 |
H04B10/02 |
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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