Patent ID: 8682174
Filing Date: 2014-03-25
Classification: H04B,H04J,H04L

Abstract:
1. An optical receiver comprising: a polarization diversity unit receiving one of a polarization multiplexed optical signal obtained by multiplexing two single polarization optical signals having a same frequency band of carrier waves and polarization states orthogonal to each other or receiving one of the two single polarization optical signals; and a frequency domain equalization unit receiving signal components parallel to mutually orthogonal polarization axes from the polarization diversity unit, wherein the frequency domain equalization unit includes filters for which filer coefficients are set for compensating degradation of transmission characteristics of the polarization multiplexed optical signal, wherein the coefficients for some of the filters are set for compensating degradation of transmission characteristics in only one of the two signal polarization multiplexed optical signals comprised in the polarization multiplexed optical signal by means of the filters in a first step when the one of the two single polarization optical signal is transmitted, the coefficients for the others of the filters are set for compensating degradation of transmission characteristics in the other one of the two single polarization optical signals comprised in the polarization multiplexed optical signal by means of the filters in a second step when the other one of the two single polarization optical signal is transmitted, the compensating is performed on the polarization multiplexed optical signal after the coefficients for all filters are set m the first step and the second step.