Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tomoto Tanaka0
Mayumi Naito0
Norifumi Shukunami0
Date of Patent
July 15, 2008
0Patent Application Number
108245760
Date Filed
April 15, 2004
0Patent Primary Examiner
Patent abstract
An amount of ASE generated changes due to a temperature and respective powers of signals input to and output from an optical amplifying unit, causing a fluctuation of a gain of the optical amplifying unit. A photodiode on an input side and a photodiode on an output side detect the input and output powers, and temperature detecting unit detects an operating temperature of the optical amplifier. A control unit corrects the amount of ASE generated, based on at least one of the detected input and output signal powers and on the detected temperature according to AGC control, which controls driving of an excitation LD for the optical amplifier to keep a gain of the optical amplifier constant.
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