专利检索 ap:("FUJITSU LIMITED") AND inv:"Murakami, Makoto Fujitsu Hokkaido Digit.Techn. Ltd" 第 1 页

1.

发明公开
Optical amplifying apparatus, wide-band optical amplifying apparatus, and optical communication system 审中-公开
标题翻译：光放大装置，宽带光放大装置和光通信系统

公开(公告)号：EP1480360A3

公开(公告)日：2005-04-06

申请号：EP04020420.8

申请日：2000-09-26

申请人： FUJITSU LIMITED

发明人： Tomofuji, Hiroaki , Sekiya, Motoyoshi , Sakamoto, Takeshi , Murakami, Makoto Fujitsu Hokkaido Digit.Techn. Ltd , Oshima, Chihiro , Onoda, Yoshihito

IPC分类号： H04B10/17 , H01S3/067

CPC分类号： H04B10/296 , H01S3/067 , H01S3/06758 , H04B10/2931 , H04B2210/258

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.