Patent ID: 9490930
Filing Date: 2016-11-08
CPC Classification: H04B,H04J

Claim Text:
1. An optical communication system for transmitting a coherently-detected polarization-multiplexed optical data signal, the optical data signal having a transmission format modulated in phase and polarization enabling data rates of 40 Gbit/s and higher, comprising: a pump source configured to generate a pump signal for amplifying the optical data signal co-propagating with the pump signal, the pump signal having rotating polarization; a polarization sensitive coherent receiver for receiving the polarization-multiplexed optical data signal and for coherently detecting the polarization-multiplexed optical data signal, the receiver having a polarization tracking cut-off frequency; an optical fiber link arranged for co-propagating the pump signal together with the optical data signal; and the polarization of the pump signal is configured to rotate at a frequency higher than the polarization tracking cut-off frequency of the receiver.