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Proceedings Paper

Characterization of HfO2-SiO2 rugate multilayers deposited by ion beam sputtering
Author(s): R. Rauhut; K. Nehls; L. Mechold
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Paper Abstract

Ion beam sputtering (IBS) is a deposition technique being well known for resulting in very dense and damage resistant coatings due to high kinetic energies of the sputtered atoms. While different layers are deposited homogeneously, abrupt interfaces between the materials are the most susceptible part of the stack. Therefore we aim for an improvement of the laser damage threshold by sputtering material mixtures. Using a target with high- and low-index material next to each other, arbitrary refractive indices can be realized by adjusting the target axis. Our material system of choice is HfO2- SiO2, already yielding good results with non-rugate coatings. A comparison in terms of laser damage threshold between these designs and varying refractive index coatings will be shown.

Paper Details

Date Published: 31 October 2014
PDF: 6 pages
Proc. SPIE 9237, Laser-Induced Damage in Optical Materials: 2014, 92370O (31 October 2014); doi: 10.1117/12.2068193
Show Author Affiliations
R. Rauhut, Laser Components GmbH (Germany)
K. Nehls, Laser Components GmbH (Germany)
L. Mechold, Laser Components GmbH (Germany)

Published in SPIE Proceedings Vol. 9237:
Laser-Induced Damage in Optical Materials: 2014
Gregory J. Exarhos; Vitaly E. Gruzdev; Joseph A. Menapace; Detlev Ristau; MJ Soileau; Detlev Ristau, Editor(s)

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