POLARIZATION MULTIPLEXING OPTICAL RECEIVER, POLARIZATION MULTIPLEXING OPTICAL RECEPTION CIRCUIT, AND POLARIZATION MULTIPLEXING OPTICAL TRANSMISSION SYSTEM

摘要

PROBLEM TO BE SOLVED: To comprehensively improve transmission quality in a polarization multiplexing optical transmission system.

SOLUTION: A polarization controller 21 controls a polarization state of an input polarization multiplexed optical signal. A polarization beam splitter 22 splits the polarization multiplexed optical signal for which the polarization state is controlled into a first polarization signal and a second polarization signal. RF power detectors 25A and 25B detect the optical power of the first polarization signal and the second polarization signal. A control circuit 26 controls the polarization controller 21 on the basis of first and second optical power signals outputted from the RF power detectors 25A and 25B.

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