Generation and Stability Analysis of Self Similar Pulses Through Specialty Microstructured Optical Fibers in Mid Infrared Regime

TL;DR

This paper presents a numerical study on generating and analyzing the stability of self-similar parabolic pulses in mid-infrared specialty microstructured optical fibers, focusing on their formation, stability, and propagation regimes.

Contribution

It introduces a detailed numerical analysis of pulse generation and stability in highly nonlinear MOFs, including effects of input shape, loss profiles, and dispersion regimes.

Findings

Successful generation of 2.1 μm parabolic pulses from Gaussian inputs.

Stability analysis under variable loss profiles shows conditions for stable propagation.

Different dispersion regimes affect the stability and shape of the pulses.

Abstract

We report a numerical study on generation and stability of parabolic pulses during their propagation through highly nonlinear specialty optical fibers. Here, we have generated a parabolic pulse at 2.1 $\mu$m wavelength from a Gaussian input pulse with 1.9 ps FWHM and 75 W peak power after travelling through only 20 cm length of a chalcogenide glass based microstructured optical fiber (MOF). Dependence on input pulse shapes towards most efficient conversion into self similar states is reported. The stability in terms of any deviation from dissipative self-similar nature of such pulses has been analyzed by introducing a variable longitudinal loss profile within the spectral loss window of the MOF, and detailed pulse shapes are captured. Moreover, three different dispersion regimes of propagation have been considered to study the suitability to support most stable propagation of the pulse.