Experimental demonstration of optical regeneration of DP-BPSK/QPSK using polarization-diversity PSA

We experimentally investigate a polarization-diversity phase-sensitive amplifier (PSA) for phase regeneration of 25-Gbaud DP-BPSK and DP-QPSK signals and show effective reduction on phase noise in both polarizations. BER measurements and reduced phase noise are achieved for both polarizations.