Influences of third-order dispersion on linear birefringent optical soliton transmission systems

Abstract

This article presents the propagation of solitons in linear birefringent single-mode fibers under the influence of third-order dispersion. The behaviour of two partial pulses evolved due to polarization mode dispersion is investigated under the presence of third-order dispersion (TOD). The analytical solutions to coupled nonlinear Schrodinger equations (CNLSE) with TOD are derived using multiple scale perturbation expansion and the results are compared with the solutions obtained using split-step Fourier method to find the effects of TOD on soliton propagation. It is found that the resultant soliton deviates from its initial position with third-order dispersion and this deviation is considerably small when the pulse propagates relatively far from the zero-dispersion wavelength. It is observed that the behaviour of two partial pulses and their subsequent properties depend not only on the fiber parameters, but also on the amplitude of the launched soliton pulses.