Regeneration of 10 Gbps BPSK signals through phase sensitive amplification coupled with injection locking

Phase squeezing using phase sensitive amplifier (PSA) typically involves an increase in amplitude noise which when propagated through a multi span link may couple it back into phase through nonlinear processes in the fiber. Through our work we propose and demonstrate a combination of semiconductor optical amplifier based-PSA and injection locking (IL) of semiconductor laser to squeeze both amplitude and phase noise thereby improving the quality of regeneration. We also investigate the effect of the sequence of the two squeezing processes on the quality of regeneration. We conclusively prove that, under optimal operating conditions, appropriate sequencing of amplitude squeezing and phase squeezing is indeed capable of obtaining a better overall noise performance.