发明名称 |
Method and apparatus for measuring Raman gain, method and apparatus for controlling Raman gain, and Raman amplifier |
摘要 |
A Raman amplifier of the present invention includes a loss measuring unit (110) for measuring loss distribution of an object of measurement by OTDR based on reflected light with respect to outputted test light; an optical coupler (114) in which the test light is supplied to a first input terminal thereof and one of output terminals thereof is connected to an optical fiber transmission line; a wavelength filter (116) inserted between the loss measuring unit (110) and the optical coupler (114); a control circuit (200) for generating a control signal for reducing an error signal obtained by comparing a Raman gain obtained with a reference value; and an excitation light source (140) for changing an excitation light power based on the control signal.
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申请公布号 |
US2004160664(A1) |
申请公布日期 |
2004.08.19 |
申请号 |
US20040761264 |
申请日期 |
2004.01.22 |
申请人 |
NEC CORPORATION |
发明人 |
SOBE MASAAKI;YANO YUTAKA |
分类号 |
G01M11/00;G01M11/02;G02F1/35;H01S3/06;H01S3/067;H01S3/10;H01S3/131;H01S3/30;H04B10/08;H04B10/17;(IPC1-7):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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