06977770 is referenced by 7 patents and cites 19 patents.

The optical amplifier according to the present invention includes a first optical amplifying unit, a second optical amplifying unit, a variable optical attenuator optically connected between the first and second optical amplifying units and a first control unit for controlling the gains of the first and second optical amplifying units according to an input to the first optical amplifying unit and an output from the second optical amplifying unit, and a second control unit for controlling the attenuation of the variable optical attenuator according to an input to and an output from the first optical amplifying unit and an input to and an output from the second optical amplifying unit.

Title
Optical amplifier and control method therefor
Application Number
10/316080
Publication Number
6977770 (B2)
Application Date
December 11, 2002
Publication Date
December 20, 2005
Inventor
Hiroshi Iizuka
Kawasaki
JP
Hiroyuki Itou
Sapporo
JP
Kosuke Komaki
Kawasaki
JP
Agent
Staas & Halsey
Assignee
Fujitsu
JP
IPC
H01S 003/00
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