Expanding the transmission window of visible-MWIR chalcogenide glasses by silicon nitride doping

Ellis Archer; Dichu Xu; Chris Craig; Katrina Morgan; Ioannis Zeimpekis

doi:10.1117/12.2663345

13 June 2023 Expanding the transmission window of visible-MWIR chalcogenide glasses by silicon nitride doping

Ellis Archer, Dichu Xu, Chris Craig, Katrina Morgan, Ioannis Zeimpekis

Proceedings Volume 12518, Window and Dome Technologies and Materials XVII ; 1251803 (2023) https://doi.org/10.1117/12.2663345
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

Gallium Lanthanum sulphur-oxide (GLSO) glass is an excellent candidate for a window/dome material ought to its wideband transmission window from visible to MWIR. The suitable optical transmission from 0.45-8 microns is supplemented by its superior thermal and mechanical properties to contemporary materials, such as Cleartran™ zinc sulphide. In this work, the properties of GLSO were enhanced by doping with small concentrations of silicon nitride (≤ 0.5 M%), which expanded the transmission window to encompass all the visible spectra. Nano-indentation demonstrated that the hardness and elastic modulus slightly improved. Overall, the improvements demonstrated here make this glass an even better solution when compared to the state-of-the-art for use in single-optic windows and domes.

Conference Presentation

Citation Download Citation

Ellis Archer, Dichu Xu, Chris Craig, Katrina Morgan, and Ioannis Zeimpekis "Expanding the transmission window of visible-MWIR chalcogenide glasses by silicon nitride doping", Proc. SPIE 12518, Window and Dome Technologies and Materials XVII , 1251803 (13 June 2023); https://doi.org/10.1117/12.2663345

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