The results of numerical analysis of the influence of the initial pulse shape on the propagation of the pulses in a birefringent nonlinear single mode fiber are presented in the paper. The results are given in form of graphs of the input pulse threshold amplitude as a function of the fiber's birefringence. The threshold amplitude is the input pulse amplitude at which the fiber nonlinearity compensates the birefringence and makes the partial pulses travel with the same velocity. The following shapes of the initial pulse were investigated: hyperbolic secant, Gaussian, super Gaussian, super Gaussian second order. The analysis was carried out by numerically solving a pair of coupled Nonlinear Schrodinger Equations using the Split Step Fourier Method. It was assumed that both orthogonal polarization components of the fiber were excited equally. The calculations were performed for an optical fiber made of silica glass. The fiber attenuation was not taken into account.

Date Published: 5 October 2005
PDF: 6 pages
Proc. SPIE 5949, Nonlinear Optics Applications, 59491L (5 October 2005); doi: 10.1117/12.622336

Published in SPIE Proceedings Vol. 5949:
Nonlinear Optics Applications
Miroslaw A. Karpierz; Allan Dawson Boardman; George I. Stegeman, Editor(s)