Investigating the relationship between material properties and laser-induced damage threshold of dielectric optical coatings at 1064 nm

Riccardo Bassiri; Caspar Clark; Iain W. Martin; Ashot Markosyan; Peter G. Murray; Joseph Tessmer; Sheila Rowan; Martin M. Fejer

doi:10.1117/12.2194784

23 November 2015 Investigating the relationship between material properties and laser-induced damage threshold of dielectric optical coatings at 1064 nm

Riccardo Bassiri, Caspar Clark, Iain W. Martin, Ashot Markosyan, Peter G. Murray, Joseph Tessmer, Sheila Rowan, Martin M. Fejer

Author Affiliations +

Proceedings Volume 9632, Laser-Induced Damage in Optical Materials: 2015; 963204 (2015) https://doi.org/10.1117/12.2194784
Event: SPIE Laser Damage, 2015, Boulder, Colorado, United States

Abstract

The Laser Induced Damage Threshold (LIDT) and material properties of various multi-layer amorphous dielectric optical coatings, including Nb₂O₅, Ta₂O₅, SiO₂, TiO₂, ZrO₂, AlN, SiN, LiF and ZnSe, have been studied. The coatings were produced by ion assisted electron beam and thermal evaporation; and RF and DC magnetron sputtering at Helia Photonics Ltd, Livingston, UK. The coatings were characterized by optical absorption measurements at 1064 nm by Photothermal Common-path Interferometry (PCI). Surface roughness and damage pits were analyzed using atomic force microscopy. LIDT measurements were carried out at 1064 nm, with a pulse duration of 9.6 ns and repetition rate of 100 Hz, in both 1000-on-1 and 1-on-1 regimes. The relationship between optical absorption, LIDT and post-deposition heat-treatment is discussed, along with analysis of the surface morphology of the LIDT damage sites showing both coating and substrate failure.

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Riccardo Bassiri, Caspar Clark, Iain W. Martin, Ashot Markosyan, Peter G. Murray, Joseph Tessmer, Sheila Rowan, and Martin M. Fejer "Investigating the relationship between material properties and laser-induced damage threshold of dielectric optical coatings at 1064 nm", Proc. SPIE 9632, Laser-Induced Damage in Optical Materials: 2015, 963204 (23 November 2015); https://doi.org/10.1117/12.2194784

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