Date Added: Nov 2009
The model of signal propagation for two channel WDM system called coupled Non-Linear Schrodinger Equations (NLSE) is introduced. The authors demonstrate effect of nonlinearities and birefringence in 2 channel WDM system. The simulation model and its numeric solution was designed including Polarization Mode Dispersion (PMD). The coupled NLSE was applied on gaussian pulses. The transmission capacity of existing optical routes has limits and increasing the transmission capacity is needed. One way consists of using optical multiplexers or rising transmission speed. But when the bit rate reaches above 10 Gbit/s, the influence of Polarization Mode Dispersion (PMD) is more important.