Compensation of intra-channel nonlinearities in 40 Gb/s pseudo-linear systems using optical phase conjugation

We compensate intra-channel nonlinearities in an RZ-DPSK-40 Gb/s 32/spl times/100 km system using a LiNbO/sub 3/ conjugator and achieve 2 decades of improvement in BER. Transmission limited to 5200 km at a BER=5/spl times/10/sup -4/ is extended to 6400 km with phase conjugation.

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