Numerical exploration of coherent supercontinuum generation in multicomponent GeSe2-As2Se3-PbSe chalcogenide based photonic crystal fiber

Numerical modeling of a photonic crystal fiber made up of multicomponent chalcogenide glass system has been reported for highly coherent supercontinuum generation in the mid-infrared spectral region. Numerical simulations based on the finite element method have been performed. Optical dispersion engineering technique has been adopted to minimize the dispersion effect at pump wavelength by alteration of geometrical parameters of designed fiber. By injecting an input pulse of 85 fs durations in the normal dispersion region, a coherent ultra-broadband supercontinuum spectrum ranging from similar to 2 to 11 mu m has been obtained in a 10 mm long fiber length using low input peak power of 950 W at 3.1 mu m.