METHOD AND ARRANGEMENT FOR REDUCING THE SIGNAL DEGRADATION IN AN OPTICAL POLARISATION-MULTIPLEX SIGNAL

摘要

Method for reducing signal degradation in an optical polarisation-multiplex system. The modulated optical signals to be transmitted are synchronised or generated such that the phase difference for NRZ-modulated signals is at least approximately 0� and the phase difference for RZ-modulated signals is at least approximately 180�. They can also be achieved by means of different synchronising devices.