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

authored by

Manfred Rahe, Detlev Ristau, Holger Schmidt

Abstract

In this paper, data of single layers of YbF₃, BaF₂, YF ₃, 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, αγ)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.

External Organisation(s)

Laser Zentrum Hannover e.V. (LZH)

Type

Paper

Pages

335-348

No. of pages

14

Publication date

24.06.1993

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Computer Science Applications, Applied Mathematics, Electrical and Electronic Engineering

Electronic version(s)

https://doi.org/10.1117/12.147408 (Access: Unknown)