Diffraction gratings for high-energy-laser (HEL) systems

Ryan Semple; Dale Smith; Claire Smith; Doug Smith; Turan Erdogan

doi:10.1117/12.3003902

24 November 2023 Diffraction gratings for high-energy-laser (HEL) systems

Ryan Semple, Dale Smith, Claire Smith, Doug Smith, Turan Erdogan

Proceedings Volume PC12726, Laser-Induced Damage in Optical Materials 2023; PC1272617 (2023) https://doi.org/10.1117/12.3003902
Event: SPIE Laser Damage, 2023, Dublin/Livermore, California, United States

Conference Poster

Abstract

High diffraction-efficiency nonpolarizing gratings with CW damage thresholds in the range of 100 kW/cm² and higher are necessary for scaling Spectral-Beam-Combined (SBC) High-Energy Laser (HEL) systems to MW powers and above. We present the results of a campaign to improve capabilities of multilayer dielectric gratings for these applications. Current capabilities are demonstrated by showing the peak temperature, damage threshold, defect density, and diffraction efficiency (where applicable) of 51 MLD gratings and 17 coatings when illuminated at 1070 nm at intensities up to 3 MW/cm².

Citation Download Citation

Ryan Semple, Dale Smith, Claire Smith, Doug Smith, and Turan Erdogan "Diffraction gratings for high-energy-laser (HEL) systems", Proc. SPIE PC12726, Laser-Induced Damage in Optical Materials 2023, PC1272617 (24 November 2023); https://doi.org/10.1117/12.3003902

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