Performance Research on 40 Gb/s DPSK Format Against Polarization-mode Dispersion
40 Gb/s差分相移键控格式抗偏振模色散的性能研究

The influences of first-order polarization-mode dispersion (PMD) on systems using differential phase-shift keying (DPSK) and on-off keying (OOK) with 40 Gb/s non-return-to-zero (NRZ) or return-to-zero (RZ) formats were studied.The eye open value of modulation formats on the different PMD effects were compared and analyzed.The simulation results show that when either the NRZ or RZ format is used,DPSK exhibits higher eye open performance than OOK in the presence of first-order PMD; NRZ-DPSK,as compared with RZ-DPSK,incurs smaller eye open due to PMD effects; CSRZ-DPSK format has better tolerance than RZ-DPSK format to PMD for a given bit rate.