发明名称 |
Optical amplifying apparatus, wide-band optical amplifying apparatus, and optical communication system |
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. <IMAGE> |
申请公布号 |
EP1094624(A3) |
申请公布日期 |
2004.02.04 |
申请号 |
EP20000120231 |
申请日期 |
2000.09.26 |
申请人 |
FUJITSU LIMITED |
发明人 |
TOMOFUJI, HIROAKI;SEKIYA, MOTOYOSHI;SAKAMOTO, TAKESHI;MURAKAMI, MAKOTO;OSHIMA, CHIHIRO;ONODA, YOSHIHITO |
分类号 |
H01S3/067;H04B10/293;H04B10/296;(IPC1-7):H04B10/17 |
主分类号 |
H01S3/067 |
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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