POLARIZATION MODE DISPERSION MEASURING METHOD, AND A DISPERSION COMPENSATION CONTROL DEVICE AND A DISPERSION COMPENSATION CONTROL METHOD

摘要

A dispersion compensation control device used in an ultrahigh-speed optical communication system using optical time division multiplexing comprises a first specific frequency component detector (2a) for detecting a first specific frequency component in a baseband spectrum of a tranmitted light signal inputted into the receiving side via a transmission fiber serving as a transmission line (6a), a first intensity detector (3a) for acquiring information on the intensity of the detected first specific frequency component detected, and a polarization mode dispersion controller (220a) for controlling the polarization mode dispersion of the transmission line (6a) so that the acquired intensity of the first specific frequency component may be maximum. Thus, the polarization mode dispersion that has occurred in a high-speed light signal can readily be detected and compensated for.