Optical solitons and their shaping in a monomode optical fiber with some inhomogeneous dispersion profiles

Abstract

In the real fiber optic communication system, the soliton transmission can be signified by nonlinear Schrödinger (NLS) equation with inhomogeneous coefficients. Here, the two-soliton propagation have been investigated by solving the inhomogeneous NLS equation with the process of Darboux transformation. According to obtained soliton solutions, variable coefficients are considered with different forms to study the features of solitons. Since soliton structures are mainly influenced by the controlling parameters, various soliton structures are obtained for specific choices of variable coefficients. Specifically, we adopt various exponential profiles for dispersion coefficient. Through properly manipulating exponential profiles, non-oscillating soliton amplification, dromion-like structure, bounded soliton and parallel soliton transmissions are explored. Results indicate that the characteristics of optical solitons are influenced by variable coefficients. In this work, we report the analytical study on transmission features of optical solitons in inhomogeneous optical fiber under various dispersion profiles. Obtained results are have some theoretical guidance for experimental research on optical amplifier, soliton based optical switches and achievement of parallel transmission of solitons.