Observation and mitigation of sub-damage threshold UV laser-induced contamination on optical surfaces at 355 nm

Lucas Willis; Brian Arnold; Cyrus Rashvand; Matthew Dabney

doi:10.1117/12.2685255

24 November 2023 Observation and mitigation of sub-damage threshold UV laser-induced contamination on optical surfaces at 355 nm

Lucas Willis, Brian Arnold, Cyrus Rashvand, Matthew Dabney

Author Affiliations +

Proceedings Volume PC12726, Laser-Induced Damage in Optical Materials 2023; PC127260F (2023) https://doi.org/10.1117/12.2685255
Event: SPIE Laser Damage, 2023, Dublin/Livermore, California, United States

Abstract

Optomechanics and surface residues can be sources of contaminants when directly illuminated or subjected to laser scatter, which can then deposit and grow on optical surfaces leading to transmission loss over time. To extend the useful lifetime of laser systems and laser optic assemblies, it is necessary to determine best practices in material selection and handling of components both in and out of the beam path. We present lessons learned from a series of month-long (~100 trilllion shots) experiments performed at 355nm with laser parameters relevant to material processing and research (20ns pulsed ~1kW/cm^2 average). Laser-induced surface contamination and transmission losses of an assortment of optics in controlled and uncontrolled environments were monitored, and contamination mitigation techniques qualified by transmission measurement and microscopy.

Conference Presentation

Citation Download Citation

Lucas Willis, Brian Arnold, Cyrus Rashvand, and Matthew Dabney "Observation and mitigation of sub-damage threshold UV laser-induced contamination on optical surfaces at 355 nm", Proc. SPIE PC12726, Laser-Induced Damage in Optical Materials 2023, PC127260F (24 November 2023); https://doi.org/10.1117/12.2685255

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