Patent ID: 8538263
Filing Date: 2013-09-17
Classification: H04B,H04J

Abstract:
1. A polarization demultiplexing optical communication system, comprising an optical transmitter for transmitting optical signals and an optical receiver for receiving the optical signals, that demultiplexes two independent optical signals of which carrier waves are allocated in the same frequency band and polarization states are at right angles to each other, wherein the optical transmitter includes deviation providing means that provides a predetermined frequency deviation between carrier wave frequencies of the optical signals to be transmitted, and fluctuation providing means that provides a periodic fluctuation having a predetermined frequency to light intensities of the optical signals to be transmitted, and wherein the optical receiver includes information extraction means that extracts intensity information of a frequency component of the periodic fluctuation from the received optical signals, and dispersion value calculation means that calculates a wavelength dispersion value of an optical transmission line on the basis of the extracted intensity information.