发明公开
- 专利标题： Optical amplifying apparatus, wide-band optical amplifying apparatus, and optical communication system
- 专利标题（中）： 光放大装置，宽带光放大装置和光通信系统
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申请号： EP04020420.8申请日： 2000-09-26
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公开(公告)号： EP1480360A2公开(公告)日： 2004-11-24
- 发明人: Tomofuji, Hiroaki , Sekiya, Motoyoshi , Sakamoto, Takeshi , Murakami, Makoto , Oshima, Chihiro , Onoda, Yoshihito
- 申请人： FUJITSU LIMITED
- 申请人地址： 1-1, Kamikodanaka 4-chome, Nakahara-ku Kawasaki-shi, Kanagawa 211-8588 JP
- 专利权人： FUJITSU LIMITED
- 当前专利权人： FUJITSU LIMITED
- 当前专利权人地址： 1-1, Kamikodanaka 4-chome, Nakahara-ku Kawasaki-shi, Kanagawa 211-8588 JP
- 代理机构： HOFFMANN - EITLE
- 优先权： JP29680099 19991019; JP33445599 19991125
- 主分类号： H04B10/17
- IPC分类号： H04B10/17 ; H01S3/067
摘要：
An optical amplifying apparatus for widening the input dynamic range and lowering noises. The optical amplifying apparatus comprises a first optical amplifier, an optical attenuator, a second optical amplifier and a controller. The first optical amplifier changes the target value of output light when the variance amount of input light reaches a predetermined value. The controller changes the attenuation amount of attenuator in accordance with a difference between the target value and the changed target value of the output light level of the first optical amplifier, when the target value of the output light level of the first optical amplifier is changed.
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