Polarisation Mode Dispersion Impairments In Direct Detection Differential Phase Shift Keying Systems
29 August 2002
We evaluate the system performance degraded by first-order polarization-mode dispersion (PMD) for non-return-to-zero (NRZ) or return-to-zero (RZ) differential phase-shift keying (DPSK) signals. The PMD-induced power penalties were measured with a PMD emulator for an optically preamplified receiver. The results show that the PMD sensitivities of DPSK signals are comparable with on-off keying signals.