Stability of out-of-phase solitons and laser pulse self-compression in active multi-core fibers

TL;DR

This paper investigates the stability of out-of-phase solitons in active multi-core fibers and demonstrates their application in laser pulse self-compression, providing optimal parameters and stability analysis.

Contribution

It introduces the stability analysis of out-of-phase solitons in multicore fibers and applies this to optimize laser pulse compression.

Findings

Out-of-phase solitons are stable under small perturbations.

Optimal fiber parameters for pulse compression are identified.

Numerical simulations confirm theoretical predictions.

Abstract

The out-of-phase soliton distribution of the wave field was found for a multicore fiber (MCF) from an even number of cores located in a ring. Its stability is proved both with respect to small wave field perturbations, including azimuthal ones and to small deformations of the MCF structure. As an example of using this soliton distribution, the problem of laser pulse compression in an active MCF is studied. The optimal fiber parameters, the minimum duration of the output pulse, and the compression length have been found, which are in good agreement with the results of numerical simulation. In order to achieve high energies in the output laser pulse, the requirements for MCF deformations are determined.