Patent ID: 7933522

Claim:
An optical signal transmission system comprising: a polarization scrambler that carries out polarization scrambling on an optical signal to cause all the polarization states in the optical signal appear within a FEC frame period of forward error correcting processing carried out by an error correction part of an optical signal processing apparatus; an optical fiber that transmits the optical signal; and the optical signal processing apparatus including, a polarization mode dispersion compensating part that receives the optical signal and optically suppresses differential group delay contained in the optical signal; a signal converting part that converts the optical signal in which differential group delay has been suppressed by means of the polarization mode dispersion compensating part, into an electric signal; and the error correcting part configured to carry out the forward error correcting processing on the electric signal obtained from the signal converting part, wherein: the polarization mode dispersion compensating part suppresses a jitter amplitude contained in the optical signal, influence of which on jitter tolerance increases due to the increase in a speed of the polarization scrambling.