Broadband Supercontinuum Generation Using Dispersion Engineered As2Se3-GeAsSe-GeAsS Waveguide at 6 μm

This paper reports a theoretical study of supercontinuum generation with a novel dispersion-engineered reverse rib waveguide design using chalcogenide materials such as As2Se3 glass as a core, GeAsSe and GeAsS as cladding. This structure achieves an ultrawide bandwidth supercontinuum spectrum because of its high nonlinear property of core material and the low mode loss. The waveguide operates at 170fs laser sech pulses pumping at 6 mu m as a central wavelength. The proposed waveguide shows an ultra-wide spectrum of up to 16 mu m at 10kW peak power and up to 13 mu m broad spectrum at 5kW peak power. Results of spectral broadening for 2kW peak power are also discussed. The designed waveguide structure should be helpful in supercontinuum sources, bio-molecule sensing, and spectroscopy.

Automated summary

This paper presents a theoretical study on supercontinuum generation using a novel dispersion-engineered reverse rib waveguide design. The waveguide is made of chalcogenide materials, with As2Se3 glass as the core and GeAsSe and GeAsS as the cladding. The structure achieves an ultrawide bandwidth supercontinuum spectrum due to the high nonlinear property of the core material and low mode loss. The proposed waveguide demonstrates an ultra-wide spectrum of up to 16 μm at 10 kW peak power and up to 13 μm broad spectrum at 5 kW peak power. The results of spectral broadening at 2 kW peak power are also discussed. The designed waveguide structure is expected to be beneficial for supercontinuum sources, bio-molecule sensing, and spectroscopy.