Bistable quartic soliton in saturable nonlinear media

TL;DR

This paper theoretically demonstrates a novel bistable quartic soliton in saturable nonlinear media, using variational and numerical methods to analyze stability, interactions, and robustness in a realistic waveguide setup.

Contribution

It introduces the concept of bistable quartic solitons in saturable media and analyzes their stability, interactions, and perturbation responses using variational and numerical techniques.

Findings

Bistable quartic solitons coexist with same duration but different amplitudes.

Stability of BQS confirmed through linear stability analysis.

Interactions and bound states of BQS analyzed in various regimes.

Abstract

This report presents a theoretical demonstration of a novel bistable quartic soliton (BQS) in saturable nonlinear media, specifically within a realistic dispersion-engineered ridge waveguide made of Lithium Niobate LiNbO3 . The study employs the variational method to establish the amplitude-width relationship, indicating the coexistence of stable solitons with the same duration but differing amplitudes. The impact of shock on the bistable soliton is examined through perturbative variational analysis, supported by numerical results. Additionally, we examine the interaction of BQS in different regimes and analyze the formation of the bound state. The robustness of the BQS under perturbations is further investigated via linear stability analysis.