Patent ID: 8095020
Filing Date: 2012-01-10
Classification: H04B

Abstract:
1. An optical receiving device, comprising: a wavelength-to-transmission quality characteristic obtaining unit for obtaining a wavelength-to-transmission quality characteristic that represents a relationship between wavelengths of other channels and transmission qualities; a residual dispersion-to-transmission quality characteristic saving unit for saving a residual dispersion-to-transmission quality characteristic that represents a relationship between residual dispersion and transmission qualities; a wavelength-to-residual dispersion characteristic generating unit for generating a wavelength-to-residual dispersion characteristic from a relationship between the wavelengths of said other channels and said residual dispersion based on said wavelength-to-transmission quality characteristic and said residual dispersion-to-transmission quality characteristic; a variable dispersion compensator for making variable dispersion compensation to another channel, wherein said variable dispersion compensator is installed in a receiving end of another channel to replace when one of said other channels is replaced by said another channel; and a variable dispersion compensation controlling unit for performing setting control on a dispersion compensation amount to be set to said variable dispersion compensator; wherein when said another channel is installed, said variable dispersion compensation controlling unit obtains a residual dispersion amount corresponding to a wavelength that is changed to said another channel from said wavelength-to-residual dispersion characteristic, and transmits said obtained residual dispersion amount of its opposite sign to said variable dispersion compensator; and said variable dispersion compensator sets the amount that is transmitted from said variable dispersion compensation controlling unit and provides the dispersion compensation to suppress said residual dispersion amount of said another channel to within a dispersion tolerance.