Düsseldorf 2007 – scientific programme
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SYOH: Symposium Optische Hochleistungsbeschichtungen für den Einsatz in Lasersystemen und anderen Anwendungen
SYOH 7: Poster Optische Hochleistungsbeschichtungen
SYOH 7.1: Poster
Wednesday, March 21, 2007, 17:30–18:30, Poster A
Damage threshold investigations of high power laser optics under atmospheric and vacuum conditions — •Lars Jensen1, Marco Jupé1, Heinrich Mädebach1, Henrik Ehlers1, Kai Starke1, Detlev Ristau1, Wolfgang Riede2, Paul Allenspacher2, and Helmut Schröder2 — 1Laser Zentrum Hannover e.V., Hannover, Germany — 2Deutsches Zentrum für Luft- und Raumfahrt, Stuttgart, Germany
It is well known that optical dielectric coatings show a change in performance when altering the environmental condition from air to vacuum. Evacuating or venting a set-up will shift the spectral characteristic and also the damage behavior of the specimen. With respect to the spectral shift it has been observed that dense dielectric coatings manufactured by Ion Assisted Deposition and Ion Beam Sputtering do not show this modification.
This work was performed to investigate AR coatings of different deposition processes to determine whether the LIDT of dense layers can also be kept stable in vacuum. It was found that the damage threshold of these dense coatings does not decrease in an evacuated environment.