Coherent optical receiver and adjustment method thereof

Details Coherent optical receiver and adjustment method thereof Coherent optical receiver and adjustment method thereof

2009-03-05

2011-12-13

Curs, Nathan (Department: 2613)

Optical communications

Receiver

C398S208000, C398S209000, C398S210000

Reexamination Certificate

active

08078064

ABSTRACT:
In a coherent optical receiver, a light intensity value of signal light providing an optimum reception state is determined when ideal signal light free from waveform distortion is used as the signal light in a state where local-oscillator light is turned on. A first amplitude value of an analog electrical signal corresponding to the signal light is stored in a storage section, wherein the first amplitude value is obtained at a time when the ideal signal light of the light intensity value determined is used as the signal light in a state where the local-oscillator light is turned off. Light intensity of the signal light is determined so as to make a second amplitude value equal to the first amplitude value, wherein the second amplitude value is an amplitude value of the analog electrical signal which is obtained at a time when actual signal light is used as the signal light in a state where the local-oscillator light is turned off.

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