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The optical phase noise oppression circuit and the phase fluctuation detector and phase fluctuation method of detection
The optical phase noise oppression circuit and the phase fluctuation detector and phase fluctuation method of detection
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机译：光学相位噪声抑制电路和相位波动检测器及相位波动检测方法
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摘要
PROBLEM TO BE SOLVED: To provide an optical phase noise suppression circuit for reducing optical phase fluctuation, and to suppress signal transmission characteristic degradation of an optical DPSK transmission system.;SOLUTION: In this optical phase noise suppression circuit, a transmitted DPSK optical signal is branched; monitor signals differentially received by two delay interferometers having phase differences of π/2 and 0 are generated; the two differentially-received monitor signals are mixed by a mixing means; a branched main signal of the DPSK optical signal is subjected to phase modulation by a phase modulation means by using the mixed signal. Then, the phase fluctuation of the main signal is canceled by subjecting a coefficient of -1 to phase modulation because the two mixed monitor signals are proportional to the phase fluctuation of the main signal.;COPYRIGHT: (C)2011,JPO&INPIT
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