Patent ID: 8229302

Claim:
An optical transmission system comprising: a transmitter (Tx) adapted to transmit optical signals via at least one fiber link (F) to a receiver (Rx), said receiver (Rx) being adapted to utilize Forward Error Correction (FEC) on received optical signals; at least one fast polarization scrambler arranged at the transmitter (Tx) to scramble a polarization state of the transmitted signal; at least one polarization delay line arranged at said receiver (Rx) for controlling a polarization mode dispersion induced distortion of the scrambled transmitted signal; feedback means arranged at said receiver (Rx) for providing a feedback signal based on at least part of the received signal, wherein said feedback signal comprises representations of both a RF power A and a RF modulation amplitude B of the received signal; and at least one polarization controller connecting said fiber link (F) and said polarization delay line, said polarization controller is adapted to be operable based on said feedback signal to enable a reduction of the polarization mode dispersion of the optical signal.