Numerical analysis on the supercontinuum generation through Al0.24Ga0.76As based photonic crystal fiber

Abstract

In this paper, supercontinuum generation dynamics in a highly nonlinear Al0.24Ga0.76As based photonic crystal fiber has been presented. The simulated geometry exhibits a low order of dispersion 4.21\xa0ps/nm.km with a high nonlinear coefficient 2.35\xa0W−1\xa0m−1at a pumped wavelength of 3.25\xa0µm. The analyzed results of the proposed fiber structure make it promising to generate the broad supercontinuum spectrum expanding from 1.75\xa0µm to 7.75\xa0µm stimulated at a peak power of 2.5\xa0kW with 50\xa0fs pulse duration. Effects of higher order dispersion coefficients, peak power and pulse duration on spectrum broadening have been computed and analyzed.