Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hiroshi Onaka0
Hideyuki Miyata0
Date of Patent
August 18, 2009
0Patent Application Number
119532780
Date Filed
December 10, 2007
0Patent Primary Examiner
Patent abstract
An apparatus comprising an optical modulator modulating a light in accordance with a modulation signal and an operating point of the optical modulator, to thereby output a modulated optical signal; and a controller controlling the operating point in accordance with a branched portion of the modulated optical signal and a detected intensity of the modulation signal so that the operating point is kept stable when the detected intensity falls below a predetermined value.
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