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

verfasst von

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.

Externe Organisation(en)

Laser Zentrum Hannover e.V. (LZH)

Typ

Paper

Seiten

335-348

Anzahl der Seiten

14

Publikationsdatum

24.06.1993

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektronische, optische und magnetische Materialien, Physik der kondensierten Materie, Angewandte Informatik, Angewandte Mathematik, Elektrotechnik und Elektronik

Elektronische Version(en)

https://doi.org/10.1117/12.147408 (Zugang: Unbekannt)