Using the Finite Element Method, a hexagonal photonic crystal fiber(H-PCF) is designed with an astroid-like shaped \(A{s}_{2}{S}_{3}\) chalcogenide glass core and Schott N-BK7 glass background material. The Sellmeier equation represents the refractive indices of both core and background materials to consider the refractive index's wavelength dependence. COMSOL Multiphysics 6.0 simulates the optical properties of the designed PCF by carrying out a parametric wavelength sweep from 0.8 µm to 1.4 µm for three different core sizes. Various characteristics of PCF, such as effective mode index, birefringence, effective mode area, confinement loss, non-linear coefficient, dispersion parameter, and group velocity dispersion (GVD), have been analyzed. Among the three fiber designs, H-PCF has the highest non-linear coefficient of 40.052 \({W}^{-1}{m}^{-1}\) at a wavelength of 0.8 μm and a shallow confinement loss of \(5.6\times {10}^{-10}\) dB/m at a wavelength of 1.06 μm. The low confinement loss value and the smaller effective area indicate the designed fiber's strong light guidance effect. The dispersion parameter value of the designed fiber of three different core sizes was from -2052.61(ps/km-nm) to 803.32(ps/km-nm) at wavelengths of 0.8 μm and 1.4 μm, respectively. These properties of designed H-PCF make it suitable for highly non-linear applications like second harmonic generation, four-wave mixing, supercontinuum generation, soliton propagation, etc.
