Analysis of SPM and XPM phenomena in optical fiber communication systems

In optical fiber communication systems using wavelength division multiplexing (WDM) technique, two important nonlinear effects, i.e. self-phase modulation (SPM) and cross-phase modulation (XPM), occur due to the dependence of refractive index to the light intensity. In this study, system parameters effecting SPM and XPM events in WDM communication systems are analyzed. In simulations, the efficiency of SPM and XPM on the channel, variation of SPM induced pulse broadening with the fiber length for various transmission rates, the relation of XPM with the channel spacing and the modulation frequency of other channels, variation of SPM and XPM limited peak launch power with the fiber length for various channel numbers are investigated.