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2 December 2022 Increase of surface LIDT of polished Co2+:MgAl2O4 crystals by plasma etching
Giedrius Abromavičius
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Proceedings Volume PC12300, Laser-Induced Damage in Optical Materials 2022; PC1230002 (2022) https://doi.org/10.1117/12.2652261
Event: SPIE Laser Damage, 2022, Rochester, New York, United States
Abstract
Remote sensing, range finding, optical communications have strong demand for compact, eye-safe lasers. Co2+:MgAl2O4 crystals can be used as a passive Q-switchers to obtain pulses of compact Er:glass lasers and might be one of the limiting factors, determining their maximum output power. This study presents oxygen plasma etching of commercially-polished Co2+:MgAl2O4 crystals, including investigation on their spectrophotometric, surface and LIDT (R(1)-on-1) properties using two different lasers and beam diameters - 172 µm and 55 µm at 1540 nm. Measurements higher fluence laser and smaller 55 µm laser beam diameter allowed determination of all etched crystals and revealed dramatic increase of their surface LIDT comparing to untreated sample.
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Giedrius Abromavičius "Increase of surface LIDT of polished Co2+:MgAl2O4 crystals by plasma etching", Proc. SPIE PC12300, Laser-Induced Damage in Optical Materials 2022, PC1230002 (2 December 2022); https://doi.org/10.1117/12.2652261
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KEYWORDS
Crystals
Carbon dioxide
Plasma etching
Surface finishing
Polishing
Carbon dioxide lasers
Laser crystals
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