Propagation behavior of super-Gaussian pulse in dispersive and nonlinear regimes of optical communication systems

In this work, the analysis of the group-velocity dispersion (GVD) effects alone as well as the interactive effects of dispersion and nonlinearity of single mode fiber on super Gaussian pulse for different pulse widths is presented, both in normal as well as anomalous dispersion regimes. Fiber attenuation, dispersive and nonlinear effects are analyzed. For this analysis, Split-step Fourier based numerical solution of nonlinear Schrodinger equation is used. Results exhibit that the peak power decreases for narrower pulse, i.e. fiber disperses the pulse more drastically for smaller values of the pulse width. From these results, even the compression of the pulse is observed as the value of steepness parameter of super-Gaussian pulse increases. Further, these investigations illustrate important findings that anomalous dispersion regime is better for the recovery of the pulse than normal regime of dispersion. These results are quite useful for deep understanding of optical fiber and to enhance the data rate in modern optical communication systems.