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2 December 2022 Experimental investigations of femto-second laser induced damage on multi-layer dielectric mirrors
Mohamed Yaseen Noor, Emma DeAngelis, Conrad Kuz, Simin Zhang, Aaron Davenport, Carmen Menoni, Enam Chowdhury
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Proceedings Volume PC12300, Laser-Induced Damage in Optical Materials 2022; PC123000N (2022) https://doi.org/10.1117/12.2642692
Event: SPIE Laser Damage, 2022, Rochester, New York, United States
Abstract
Understanding the physical process behind laser-induced damage of multilayer dielectric (MLD) interference coatings (IC) is of supreme importance for building ultrahigh-intensity laser systems. We experimentally studied the S-on-1 laser-induced damage threshold (LIDT) and damage characteristics of the SiO2/HfO2 high reflector quarter-wave stacks for three different femtosecond pulse durations operating at 1030nm wavelength. The S-on-1 LIDT for 1,10,100,1000 and 10000 pulses were recorded, and the values compare well with the state of the art. A strong correlation between single-shot damage morphology and laser focal intensity profiles was observed. Potential damage mechanisms of IC layers consistent with our observation will be discussed.
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Mohamed Yaseen Noor, Emma DeAngelis, Conrad Kuz, Simin Zhang, Aaron Davenport, Carmen Menoni, and Enam Chowdhury "Experimental investigations of femto-second laser induced damage on multi-layer dielectric mirrors", Proc. SPIE PC12300, Laser-Induced Damage in Optical Materials 2022, PC123000N (2 December 2022); https://doi.org/10.1117/12.2642692
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KEYWORDS
Laser induced damage
Dielectric mirrors
Laser systems engineering
High power lasers
Mirrors
Optical coatings
Optical components
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