Abstract
We report computational modelling and numerical analysis of rib optical waveguide composed of chalcogenide GeSe2-As2Se3-PbSe and MgF2 glasses for mid infrared supercontinuum generation. Employing finite element method, we analyse the influence of geometrical parameters on waveguide dispersion & nonlinearity and perform dispersion engineering to minimize dispersion effects. Later, we analyse the influence of laser operating conditions on spectral broadening. Our simulations report a waveguide featuring zero dispersion wavelength at 2680 nm and 3310 nm in the mid infrared region, 1.4–7.6 μm spectral broadening when pumped at 3.1 μm wavelength with 85 fs pulses at peak power of 5.2 kW in a 10 mm long waveguide and nonlinearity of 991 W−1 km−1 making it suitable for mid infrared nonlinear applications.
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