Numerical investigation and analysis of flattened dispersion for supercontinuum generation at very low power using Hexagonal shaped Photonic crystal fiber (H-PCF)

摘要

In this work, we report a design of hexagonal photonic crystal fiber (PCF) with eight hexagonal rings with modified air hole size at the innermost ring. We analyze and compare the major optical parameters of a PCF such as dispersion and nonlinearity over the span of wavelength ranges from 800 nm to 1600 nm at different core diameters. The designs exhibit a high nonlinearity of 220 W-1 km(-1) and 116.76 W-1 km(-1) at 800 nm for supercontinuum generation in designed PCF and along the dispersion in negative characteristics about -650 ps/nm.km at 1310 nm with two zero dispersion wavelengths at 864 nm and at 1484 nm are numerically studied. In addition, we investigate the numerical modeling of supercontinuum (SC) generation in the designed PCFs and nearly 600 nm using 50 fs pulse with 2 kW pump power at 800 nm spectrum have been observed.