Generation and detection of 28Gbaud Polarization Switched-QPSK in WDM Long-Haul Transmission Systems

We report on experimental long-haul transmission of 28Gaud PS-QPSK signal in WDM scenarii. This report presents, to the authors' knowledge, a novel implementation of an optical coherent receiver for the polarization-switched quadrature phase shift keying (PS-QPSK) modulation format, with minor variations on the standard coherent PDM-QPSK receiver. We then compare the performance of PS-QPSK with that of 28Gbaud PDM-QPSK signal and demonstrate its interest into software-defined optical transceivers operating over dispersion managed and non-managed transmission links.