A Graded Index Hybrid Photonic Crystal Fiber for Supercontinuum Generation using AsSe₂- As₂S₅

We design and simulate an especially engineered photonic crystal structure. AsSe₂ as the solid core and As₂S₅ in graded-index hybrid cladding. Hybrid cladding region with inner cladding as a graded helical structure and outer cladding is a hexagonal structure. We have tailored the structural parameters to obtain nearly zero flat-top dispersion profile with all normal dispersion profile. The dispersion at 5 μm is -53.13 ps/nm-km with effective mode area of the fundamental mode as 4.18 µm². Proposed PCF is suitable for the generation of an ultra-broadband supercontinuum spectrum from 1 μm to 11 μm in MIR domain when pumped with the peak power of 0.75 KW at 5 μm with 50 fs pulse width. Proposed PCF design holds potentiality for applications like early cancer diagnostics, gas sensing and food quality check.