Dispersion-managed soliton fiber laser with random dispersion, multiphoton absorption and gain dispersion

TL;DR

This paper investigates the formation, stability, and interactions of dispersion-managed dissipative solitons in fiber lasers with random dispersion, multiphoton absorption, and gain dispersion, revealing their robustness and collision dynamics.

Contribution

It introduces a model accounting for randomness and higher-order effects in dispersion-managed solitons, analyzing their robustness and interaction behaviors.

Findings

Solitons exhibit breather-like evolution and are robust up to a critical randomness level.

Multiphoton absorption and gain dispersion significantly influence soliton dynamics.

Soliton collisions often result in merger, sensitive to initial separation.

Abstract

We address the generation and interaction of dispersion-managed dissipative solitons (DMDS) in a model of fiber lasers with the cubic-quintic nonlinearity, multiphoton absorption and gain dispersion. Both anomalous and normal segments of the dispersion map include random dispersion fluctuations. Effects of the gain dispersion, higher-order nonlinearity and randomness on the generation of DMDS are demonstrated. The solitons exhibit breather-like evolution, and are found to be robust, up to a certain critical level of the random-dispersion component, which is sufficiently high. The roles of multiphoton absorption, gain dispersion and nonlinearity on the DMDS are also identified in the absence of randomness. Pair wise interactions of solitons lead, most typically, to their merger, with breaking of the left-right symmetry. The outcome of the collisions is more sensitive to the initial temporal separation between the solitons than to their phase difference.