Optical receiver and signal processing method

Abstract

There is provided an optical receiver including: an acquisition unit that acquires a signal indicating an in-phase component and a signal indicating a quadrature component for each of polarized waves of received light; and an error detection unit that detects, as an angle error, a deviation in orthogonality between the in-phase component and the quadrature component based on the signals, the components being generated in an optical hybrid circuit that performs coherent detection of the received light, and updates a setting value to be used for compensation processing of the deviation in orthogonality in at least one of the optical hybrid circuit or an equalizer based on the angle error.

Dependencies are inferred from the claim text.