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

The increasing demand in spectroscopy and sensing calls for mid-IR light sources. Here, we theoretically investigate nonlinear wavelength conversion of Ge28Sb12Se60 chalcogenide glass waveguide in the mid-IR spectral regime. With waveguide dispersion engineering, we predict generation of over an octave wavelength (2.8~5.9 μm) tuning range Raman soliton self-frequency shift, over 2.5 octaves wavelength cover range supercontinuum (1.2~8.0 μm), as well as single soliton Kerr comb generated in suspended Ge28Sb12Se60 waveguide. Our findings evidenced that Ge28Sb12Se60 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.