Effect of hydrogen concentration in conventional and IAD coatings on the absorption and laser-induced damage at 10.6 um

Manfred Rahe; Detlev Ristau; Holger Schmidt

doi:10.1117/12.147408

24 June 1993 Effect of hydrogen concentration in conventional and IAD coatings on the absorption and laser-induced damage at 10.6 μm

Manfred Rahe, Detlev Ristau, Holger Schmidt

Author Affiliations +

Proceedings Volume 1848, 24th Annual Boulder Damage Symposium Proceedings -- Laser-Induced Damage in Optical Materials: 1992; (1993) https://doi.org/10.1117/12.147408
Event: Optical Materials for High Power Lasers, 1992, Boulder, CO, United States

Abstract

In this paper, data of single layers of YbF₃, BaF₂, YF₃, and NaF and multilayer coatings produced by conventional thermal evaporation (boat, e-beam) and ion assisted deposition (IAD) are compared. Hydrogen concentration depth profiling was performed using nuclear reaction analysis based on the reaction ¹H(¹⁵N, (alpha) (gamma) )¹²C. Absorption was measured with the aid of a laser calorimeter and a cw CO₂ laser. A computer-controlled test facility with a TEA CO₂ laser was used for determining the 1-on-1 damage thresholds of the coatings. The results point out that the absorption and damage behavior of coatings for the CO₂ laser wavelength are related to the total amount of species containing hydrogen. Most of the IAD coatings exhibit a lower hydrogen contamination than conventional thin films.

Citation Download Citation

Manfred Rahe, Detlev Ristau, and Holger Schmidt "Effect of hydrogen concentration in conventional and IAD coatings on the absorption and laser-induced damage at 10.6 μm", Proc. SPIE 1848, 24th Annual Boulder Damage Symposium Proceedings -- Laser-Induced Damage in Optical Materials: 1992, (24 June 1993); https://doi.org/10.1117/12.147408

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