Patent ID: 8351795
Filing Date: 2013-01-08
Classification: H04B

Abstract:
1. An optical transmission system comprising: an optical transmitter that transmits an optical signal capable of transmitting multi-bit information within one symbol time and that uses at least a polarization multiplexing system, to a transmission line; and an optical receiver that receives the optical signal propagated through the transmission line, wherein the optical transmitter comprises: a transmission signal process circuit having an encode section which generates a transmission signal in which transmission information has been encoded according to a preset format, and a detection bit addition section which imparts a detection bit having a specific pattern set according to a number of bits to be transmitted within one symbol time with respect to the transmission signal generated by the encode section, the detection bit is used in order to detect logic inversion or bit swap in the optical receiver; a light source; and an optical modulation section which transmits an optical signal generated by modulating an output light from the light source to the transmission line according to the transmission signal imparted with the detection bit output from the transmission signal process circuit, and the optical receiver comprises: a light reception section which receives the optical signal propagated through the transmission line and converts the optical signal into an electric signal; and a received signal process circuit having a detection compensation section which detects at least one of logic inversion and bit swap in received data by using the detection bit included in a received signal output from the light reception section to compensate the logic inversion or bit swap according to the detection result, and a decode section which executes decoding of the received signal output from the detection compensation section, wherein when the optical signal transmitted from the optical transmitter to the transmission line is capable of transmitting 2 the detection bit addition section, for the first to the n-th channels comprising 2