Optimization of hexagonal boron-doped silicate photonic crystal fiber to obtain near zero flattened dispersion for nonlinear waves by finite difference method

Abstract

The B2O3-doped silicate photonic crystal fiber (PCF) containing small core and dielectric rods built of lead silicate SF57 has been most intensively explored for diverse pump signals centered at a 0.65 µm, communication band. This type of doping has been carried out to diminish the upgraded refractive index of silica by a significant amount. This enhances special capabilities that lead to an outstanding potential to PCF for the profoundly intense field in the optical Kerr effect. In this study, the mode analysis has been done by solving a nonlinear wave equation for a Gaussian input beam using the finite difference method under analytical boundary conditions. Numerical results show that due to ultra-low changes in nonlinear behaviour, extremely small doping of B2O3 is needed to enable sustained confinement of a beam with flattened dispersion. © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.