Optical Phase Conjugation and Pseudo-Linear Transmission

We describe the use of optical phase conjugation (OPC) to suppress intra-channel nonlinearities limiting pseudo-linear transmission. We show that OPC, used in combination with appropriate dispersion mapping, is effective in suppressing intra-channel nonlinearities, even in the absence of signal power evolution symmetry that is generally required by OPC. An increase in signal power by 5.5 dB is observed when using a single OPC for 40-Gb/s pseudo-linear transmission over 32 passive-fiber spans.