Optical Phase Conjugation Using Nonlinear SOA for Nonlinearity and Dispersion Compensation of Coherent Multi-Carrier Lightwave Systems

We study the use of nonlinear semiconductor optical amplifier (SOA) for generating phase conjugate towards compensation distortions in short distance fiber transmission due to Kerr nonlinearity and chromatic dispersion coherent multi-carrier lightwave signals. experimentally demonstrate effectiveness SOA-based conjugator improve link budget with a 100 km standard single mode 20 GHz OFDM signals, QPSK 16QAM modulations corresponding net bit-rate 40 Gbps 80 respectively. Mid-span spectral inversion scheme is employed where generated through partially degenerate four-wave mixing process SOA. bit error rate performance within 2×10 -2 an average launched power up 12 dBm (9 dBm) (16QAM) link. also investigate possible improvement using numerical simulation 64QAM CO-OFDM signals proposed scheme.