Polarization de-multiplexing algorithm based on twice real-valued FastICA (invited)

Twice real-valued FastICA (TR-FastICA) algorithm is proposed in this paper to eliminate crosstalk between the two polarization multiplexed complex-valued higher-order quadrature modulation format such as QPSK signals induced by polarization mode coupling with polarization mode dispersion (PMD) and polarization dependent loss (PDL) for the coherent optical polarization division multiplexing (CO-PDM) system. The proposed algorithm has much lower computation complexity meaning simpler hardware implementation compared with algorithm based on complex maximization of non-Gaussianity (CMN). Simulation results show that the proposed TR-FastICA algorithm can eliminate crosstalk between the two polarization signals effectively and improve the transmission performance.