Simulation and Performance Analysis of SPM, XPM and FWM in Optical Fiber Communication System

Abstract

In present era Focus on development of broadband optical communication systems is incredible since it offers combination of wide bandwidth and low losses  unmatched by any other transmission medium. There are some limiting factors  related to data rate and capacity in optical fiber communication system. These limiting factors can be linear or non-linear. We can compensate the linear effect such as dispersion and attenuation by using dispersion compensation methods. But the non-linear effect still accumulate with the increase in optical power levels. When all the input signal frequencies interact due to fiber nonlinearities, the output bit stream may behave in a complicated way giving adverse effects on system performance. In wavelength-division multiplexing (WDM) systems, inter-channel interference due to fiber nonlinearities may limit the system performance significantly. Therefore, it is crucial to understand fiber nonlinearities and their effects on fiber-optic communication systems. The main motivation of this work was to study theoretical and simulation studies of broad band optical communication systems due to fiber nonlinearities. Here, we investigate power effects on simulation of optical communication systems with Self Phase Modulation (SPM) and Four Wave Mixing(FWM), by using the parametric run feature in Optisystem. The eye diagram highlights the conversion due to the SPM and FWM. Specifically the eye opening decreases with increasing transmitted power.