Optical links are widely preferred nowadays because of their high bandwidth and high speed which make them attractive and suitable for many communication applications. The three major problems encountered in optical communication are losses (signal attenuation), dispersion (pulse broadening) and non linearity (harmonic distortion, intermodulation distortion etc.). The losses and dispersion can be effectively compensated by using appropriate amplifier and dispersion compensated fiber (DCF) respectively. However the use of amplifier itself produces non linearity, so it becomes a serious...