发明名称 |
Branch line monitoring system and branch line monitoring method |
摘要 |
The present invention relates to a branch line monitoring system and branch line monitoring method comprising a configuration which improves the S/N ratio of measurement information and can be realized inexpensively. This system is provided with optical filters which correspond to optical fiber lines to be monitored as branch lines. These optical filters each have such a cutoff characteristic as to cut of f respective one channel of monitor light but transmit therethrough the remaining monitor light and signal light. When the optical filters having such a cutoff characteristic are provided, each of the optical fiber lines is monitored by use of a plurality of channels of monitor light other than the one cut off by the optical filter provided so as to correspond thereto. Consequently, as compared with the case where one optical fiber line is monitored by its corresponding one channel of monitor light, the S/N ratio of measurement information is improved, whereby highly accurate monitoring is possible.
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申请公布号 |
US6771358(B1) |
申请公布日期 |
2004.08.03 |
申请号 |
US20000637571 |
申请日期 |
2000.08.14 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
SHIGEHARA MASAKAZU;KANAMORI HIROO |
分类号 |
G01M11/00;H04B10/071;H04B10/08;(IPC1-7):H04B10/08;H04B17/00;G01N21/00 |
主分类号 |
G01M11/00 |
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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