发明申请
- 专利标题： Dispersion compensating apparatus and dispersion compensation control method
- 专利标题（中）： 色散补偿装置和色散补偿控制方法
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申请号： US11785896申请日： 2007-04-20
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公开(公告)号： US20080056710A1公开(公告)日： 2008-03-06
- 发明人: Hiroki Ooi , Hiroshi Onaka , Takeshi Hoshida
- 申请人： Hiroki Ooi , Hiroshi Onaka , Takeshi Hoshida
- 申请人地址： JP Kawasaki
- 专利权人： FUJITSU LIMITED
- 当前专利权人： FUJITSU LIMITED
- 当前专利权人地址： JP Kawasaki
- 优先权： JP2006-235510 20060831
- 主分类号： H04B17/00
- IPC分类号： H04B17/00
摘要：
A variable dispersion compensating unit compensates an optical signal, and changes the compensation amount according to a control signal that has a given frequency. After demodulation of the compensated optical signal, error conditions of the signal are monitored and an error signal is output. A band pass filter filters the error signal for a component having a frequency equal to or less than the given frequency. Based on the component and on the control signal, a synchronous detecting circuit generates a compensation amount modification signal. The compensation amount modification signal is superposed on the control signal.