First demonstration of non-degenerate phasesensitive amplification with pump light recovered by optical phase-locked loop

ND-PSA with a pump light recovered by an OPLL circuit is experimentally demonstrated for the first time. The ND-PSA with recovered pump amplifies 20-Gbit/s QPSK-PCTWs and results in 19.1-dB Q-factor even though optical phase noise is loaded to the input PCTWs.