Mid-infrared wideband supercontinuum generation spanning up to 14 µm using dispersion-tailored all-chalcogenide step-index fiber

We numerically study the mid-infrared supercontinuum generation employing a 5-cm-long dispersion-engineered all chalcogenide step-index fiber made using As
₂
Se
₃
glass as a core and Ge
_11.5
As
₂₄
Se
_64.5
glass for its outer cladding. An ultrawideband supercontinuum spanning up to 14μm could be generated employing a pump source having 170-fs pulses at 5.5μm with a peak power of 10 kW.