Homodyne optical receiver equipment.

摘要

A homodyne optical receiver equipment has a polarization beam splitter (2) for dividing an optical signal (1) into an optical signal with horizontal polarization (3X) and an optical signal with vertical polarization (3Y); optical couplers (7X, 7Y) for combining two optical signals of the two polarized components (3X, 3Y) with two optical local signals (4X, 4Y), which are almost matched therewith in the polarization, in a state where they are matched with each other in the phase, respectively; detectors (7X, 7Y) for homodyne-detecting respective output optical signals of the optical couplers; two weighting circuits (9X, 9Y) for giving output signals (8X, 8Y) of the detectors (7X, 7Y) weights approximately proportinal to amplitudes thereof, respectively; and an adder (13), which adds output signals of said weighting circuits (9X, 9Y) to each other.