A modified fiber dispersion model using continuous β2 over wavelength for numerical simulation of optical pulse propagation through dispersive nonlinear fibers in WDM systems

To accurately simulate transmissions of optically wavelength division multiplexed signals with a large spectral width through dispersive nonlinear fibers, a modified fiber dispersion model using the continuous group velocity dispersion (GVD) over wavelength (=β2(ω)) has been proposed. This model can provide an accurate simulation of the interaction between the dispersion and the fiber nonlinearities by the extraction of the propagation constant (=β(ω)) from the continuous GVD without neglecting higher order dispersion terms. This method has been applied to dispersion managed 32 channel × 40 Gbps WDM systems to simulate the transmission performance. Our simulation results suggest that the proposed method can accurately model the dispersion effect with the presence of fiber nonlinearities, compared with conventional method.