Light receiver

This invention relates to a light receiver (14) provided with: a phase modulation unit (15) that generates a local oscillation light and modulates the phase of the local oscillation light; a coherent detection unit (10) that causes a received light signal and the local oscillation light with the phase modulated by the phase modulation unit (15) to interact with each other, thereby converting the light signal to an electric signal; a polarization separation/adaptive equalization unit (11) that polarization-separates and adaptively equalizes the electric signal after coherent detection; and decoding units (12, 13) that decode the polarization-separated electric signals outputted by the polarization separation/adaptive equalization unit (11). 本发明的光接收器(14)，其具有：相位调制部(15)，其生成本地振荡光，并对本地振荡光的相位进行调制；相干检波部(10)，其使所接收的光信号与利用相位调制部(15)实施了相位调制后的本地振荡光发生干涉，并将光信号转换为电信号；偏振分离/自适应均衡部(11)，其对相干检波后的电信号实施偏振分离及自适应均衡；以及解码部(12、13)，其对从偏振分离/自适应均衡部(11)输出的经过偏振分离的电信号实施解码。