Periodic and solitary waves generating in optical fiber amplifiers and fiber lasers with distributed parameters

TL;DR

This paper investigates the self-similar dynamics of picosecond light pulses in optical fiber amplifiers and lasers with distributed parameters, deriving solutions and analyzing their stability.

Contribution

It derives a variety of periodic and solitary wave solutions for the generalized nonlinear Schrödinger equation with distributed parameters and studies their stability.

Findings

Existence of stable periodic and solitary wave solutions.

Profiles of these waves remain unchanged during evolution.

Constraints on fiber parameters for wave existence.

Abstract

We study self-similar dynamics of picosecond light pulses generating in optical fiber amplifiers and fiber lasers with distributed parameters. A rich variety of periodic and solitary wave solutions are derived for the governing generalized nonlinear Schr\"{o}dinger equation with varying coefficients in the presence of gain effect. The constraint on distributed optical fiber parameters for the existence of these wave solutions is presented. The dynamical behaviour of those self-similar waves is discussed in a periodic distributed amplification system. The stability of periodic and solitary wave solutions is also studied numerically by adding white noise. It is proved by using the numerical split-step Fourier method that the profile of these nonlinear self-similar waves remains unchanged during evolution.