Berlin 2008 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 14: Optical Layers: Basic Research and Applications

DS 14.3: Hauptvortrag

Dienstag, 26. Februar 2008, 13:00–13:30, H 2032

Mixed oxide coatings for advanced fs-laser applications — •Marco Jupe¹, Marc Lappschies¹, Kai Starke¹, Detlev Ristau¹, Andrius Melninkaitis², Valdas Sirutkaitis², Igor Cravetchi³, and Wolfgang Rudolph³ — ¹Laser Zentrum Hannover, Hannover, Deutschland — ²Laser Research Center, Vilnius University, Vilnius, Lithuania — ³Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM 87131, USA

A modified IBS-process was used to create mixtures of oxide coating materials. The process allows to manufacture new designs, whereas the important optical and electronic properties of the material can be varied in a wide range. Especially for ultra short pulse applications, higher damage thresholds can be achieved. In this paper, LIDT measurements of mixed and pure single layers are presented. The coatings were investigated at different wavelengths and in a wide pulse duration range. The results of the measurements confirm the empirical law of the linear LIDT dependency on the absorption gap. Based on this empirical law, the RISED concept was developed. From the data of the single layer measurements, an optimization of RISED optical components in the fs-regime will lead to even higher damage thresholds. Particularly, for high reflecting mirrors the damage threshold could be doubled for different dielectric coating materials. Additionally, the paper presents a theoretical analysis of the stack LIDT on the basis of the single layer properties.