发明授权
- 专利标题: Chromatic dispersion monitoring method and chromatic dispersion monitoring apparatus, and optical transmission system
- 专利标题(中): 色散监测方法和色散监测装置,以及光传输系统
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申请号: US11475046申请日: 2006-06-27
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公开(公告)号: US07769299B2公开(公告)日: 2010-08-03
- 发明人: Hiroki Ooi , Akira Miura , Hiroshi Onaka
- 申请人: Hiroki Ooi , Akira Miura , Hiroshi Onaka
- 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
- 代理机构: Staas & Halsey LLP
- 优先权: JP2006-023742 20060131
- 主分类号: H04B10/12
- IPC分类号: H04B10/12 ; H04B10/00
摘要:
A chromatic dispersion monitoring apparatus according to the present invention comprises: a photodetector which photo-electrically converts an optical signal; a low-pass filter which limits a frequency bandwidth of the photo-electrically converted electrical signal to be within a range set according to a modulation format of the optical signal and a bit rate thereof; a DC elimination circuit which eliminates a direct current component of the bandwidth limited electrical signal; and a power detector which detects the power of the bandwidth limited electrical signal to detect the residual dispersion of the optical signal. As a result, it becomes possible to easily realize the chromatic dispersion monitoring apparatus of low cost, which is also capable to be arranged on an in-line.