Switching of Picosecond Pulses under Third Order Dispersion Effects in a Non Linear Fiber Coupler

In this paper, we numerically study the propagation and switching of the picosecond pulses under nor mal and anomalous dispersion regimes. If a strong optical pulse is given as input to a single core of two core fiber coupler under anomalous dispersion regime, then as the pulse in one core decreases its amplitude; correspondingly the pulse in other core i ncreases its amplitude. The power exchange is possible only when the guides are made of material with third order optical susceptibility. The non linear susceptibility give s rise to self trapping of power in the original guide. Hence after a coupling lengt h the output power changes from 0% to 100% in the original guide .