Comparison of aging effects in hafnia and titania thin films on the laser damage resistance of high reflection coatings for 1054 nm

Ella S. Field; Damon E. Kletecka

doi:10.1117/12.2280708

13 November 2017 Comparison of aging effects in hafnia and titania thin films on the laser damage resistance of high reflection coatings for 1054 nm

Ella S. Field, Damon E. Kletecka

Author Affiliations +

Proceedings Volume 10447, Laser-Induced Damage in Optical Materials 2017; 1044714 (2017) https://doi.org/10.1117/12.2280708
Event: SPIE Laser Damage, 2017, Boulder, Colorado, United States

Abstract

Optical coatings deposited using electron beam evaporation are subject to aging effects that change the spectral characteristics of the optical coating. The aim of this study was to determine whether aging effects can also negatively impact the laser damage resistance of an optical coating. Maintaining high resistance to laser damage is particularly important for the performance of high fluence laser systems. In 2013, we deposited different high reflection coatings for 1054 nm containing HfO₂/TiO₂/SiO₂ layers. For this study, we re-measured the laser damage thresholds of these coatings at 3.5 ns to determine if aging effects cause the laser damage threshold to decline, and to compare whether HfO₂ or TiO₂ is superior in terms of long-term laser damage resistance.

Citation Download Citation

Ella S. Field and Damon E. Kletecka "Comparison of aging effects in hafnia and titania thin films on the laser damage resistance of high reflection coatings for 1054 nm", Proc. SPIE 10447, Laser-Induced Damage in Optical Materials 2017, 1044714 (13 November 2017); https://doi.org/10.1117/12.2280708

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