Patent ID: 7616900
Filing Date: 2009-11-10
Classification: H04B,H04J

Abstract:
1. An optical signal degradation compensator, comprising: a demultiplex unit generating demultiplex signals by demultiplexing a wavelength-division multiplexed optical signal into optical signals having a wavelength respectively; a plurality of wavelength signal adjustment units controlling polarization states of a plurality of the demultiplex signals to make adjustments related to waveform degradation compensation for a signal made by multiplexing the demultiplex signals; a multiplex unit generating a multiplex signal by multiplexing outputs of the plurality of wavelength signal adjustment units; a multiplex signal compensation unit compensating for differential group delay between polarization mode components of the multiplex signal outputted by the multiplex unit; a wavelength signal selection unit selecting a component with one of a plurality of wavelengths of the demultiplex signal from a part of the output of the multiplex signal compensation unit; and a compensation control unit compensating waveform degradation of the multiplex signal output from the multiplex unit, by detecting a polarization mode dispersion of the component corresponding to the wavelength selected by the wavelength signal selection unit and controlling adjustment by the wavelength signal adjustment unit corresponding to the selected wavelength so as to reduce the polarization mode dispersion value.