Novel Localized Waves in a Two-mode Nonlinear Fiber with High-order Effects

TL;DR

This paper explores new types of localized waves in a two-mode nonlinear fiber considering high-order effects, revealing diverse wave structures that could guide future experimental research.

Contribution

It introduces novel localized wave solutions in coupled Sasa-Satsuma equations with high-order effects, expanding understanding of wave dynamics in nonlinear fibers.

Findings

Discovery of dark-antidark soliton pairs

Identification of W-shaped and dark W-shaped solitons

Presence of combined localized wave structures

Abstract

We study on rational solutions on nonzero background of coupled Sasa-Satsuma equations through Darboux transformation method, which take into account third order dispersion, the term with self-frequency shift, and the term describing self-steepening corrections to the cubic nonlinearity. We find there are some new types of localized waves in the coupled system, such as dark-antidark soliton pair, W-shaped soliton, dark W-shaped soliton, and the combined localized waves of them. The results indicate that there are abundant novel localized waves in the two-mode fiber with these high-order effects, which would inspire experimental realization in the related physical systems.