OPTICAL RECEPTION CIRCUIT

摘要

An optical reception circuit (100) for receiving and demodulating a phase-modulated and wavelength-multiplexed optic signal. A demodulator (110) causes a reference signal for phase comparison and the received optic signal to interfere with each other and outputs as a positive-phase signal and a negative-phase signal. A wave separating part (120) has a plurality of input ports into which the positive-phase and negative-phase signals output by the demodulator (110) are input adjacently to each other and a plurality of output ports, separates the input positive-phase and negative phase signals for each wavelength, and outputs the separated positive-phase and negative phase signals adjacently to each other for each wavelength. A balanced receiver (130) is provided corresponding to each wavelength and balance-receives the positive-phase and negative phase signals of each corresponding wavelength among the outputs from the wave separating part (120) for demodulation.