发明名称 |
Optical transmission apparatus |
摘要 |
An optical transmission apparatus is arranged by: means for demultiplexing monitoring light for received wavelength-multiplexed signal light so as to detect optical intensity of the monitoring light; means for detecting optical intensity of wavelength-multiplexed signal light after the monitoring light has been demultiplexed therefrom; a gain controlling type optical amplifier for amplifying the wavelength-multiplexed signal light; an optical attenuating unit for adjusting optical intensity of the amplified wavelength-multiplexed signal light; and a monitoring control unit for controlling the gain controlling type optical amplifier in such a manner that the gain of the optical amplifier becomes constant, and for controlling an attenuating amount of the optical attenuating unit in such a manner that the optical intensity of the wavelength-multiplexed signal light becomes a predetermined target value. |
申请公布号 |
US8121486(B2) |
申请公布日期 |
2012.02.21 |
申请号 |
US20080027383 |
申请日期 |
2008.02.07 |
申请人 |
UDA TETSUYA;TAKEUCHI HIROSHI;HITACHI, LTD. |
发明人 |
UDA TETSUYA;TAKEUCHI HIROSHI |
分类号 |
H04B10/08;H04B10/02;H04J14/02 |
主分类号 |
H04B10/08 |
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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