Third-Order Nonlinear Wavelength Conversion in Chalcogenide Glass Waveguides towards Mid-Infrared Photonics

The increasing demand in spectroscopy and sensing calls for infrared (mid-IR) light sources. Here, we theoretically investigate nonlinear wavelength conversion of Ge 28 Sb 12 Se 60 chalcogenide glass waveguide in the mid-IR spectral regime. With waveguide dispersion engineering, we predict generation of over an octave wavelength (2.8 μm–5.9 μm) tuning range Raman soliton self-frequency shift, over 2.5 octaves wavelength cover range supercontinuum (1.2 μm–8.0 μm), as well as single soliton Kerr comb generated in suspended Ge 28 Sb 12 Se 60 waveguide. Our findings evidenced that Ge 28 Sb 12 Se 60 chalcogenide glass waveguides can simultaneously satisfy the generation of Raman soliton self-frequency shift, supercontinuum spectrum, and Kerr frequency comb generation through dispersion engineering towards mid-IR on chip.