Patent ID: 9467228
Filing Date: 2016-10-11
CPC Classification: H04B,H04J

Claim Text:
1. An optical transmission system, comprising: an optical transmitter; and an optical receiver, wherein the optical transmitter includes: the optical receiver includes: the first digital signal processor generates a plurality of electric-field information signals corresponding to the transmission signal, each of the electric-field information signals including a first polarization signal and a second polarization signal corresponding to respective orthogonal polarizations, and frequency-multiplexes the plurality of electric-field information signals, the transmitter front-end generates an optical signal that includes a plurality of sub-carriers from a signal that represents the frequency-multiplexed plurality of electric-field information signals, the receiver front-end generates an electric signal that represents the optical signal generated by the transmitter front-end, the second digital signal processor detects polarization dependent effects respectively on the sub-carriers included in the optical signal based on the electric signal, and the first digital signal processor respectively corrects the electric-field information signals by respectively performing rotation transformation for controlling the mixing of the first polarization signal and the second polarization signal, amplitude control for controlling the amplitude of the first polarization signal and the amplitude of the second polarization signal, and phase shift for controlling the phases of the first polarization signal and the second polarization signal on each of the electric-field information signals, based on the polarization dependent effects respectively on the sub-carriers detected by the second digital signal processor in the optical receiver.