发明名称 |
Chromatic dispersion monitoring method and chromatic dispersion monitoring apparatus |
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. |
申请公布号 |
EP1814245(A1) |
申请公布日期 |
2007.08.01 |
申请号 |
EP20060013118 |
申请日期 |
2006.06.26 |
申请人 |
FUJITSU LTD. |
发明人 |
OOI, HIROKI;MIURA, AKIRA;ONAKA, HIROSHI |
分类号 |
H04B10/2507;H04B10/2513;H04B10/07;H04B10/079;H04B10/2525;H04B10/548 |
主分类号 |
H04B10/2507 |
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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