Bending Loss Analysis of Chalcogenide Glass Channel Waveguides for Mid-infrared Astrophotonic Devices

SUMMARY In this study, the bending losses of chalcogenide glass channel optical waveguides consisting of an As 2 Se 3 core and an As 2 S 3 lower cladding layer were numerically evaluated across the astronomical 𝑁 -band, which is the mid-infrared spectral range between the 8 𝜇 m and 12 𝜇 m wavelengths. The results reveal the design rules for bent waveguides in mid-infrared astrophotonic devices.