Riede, Wolfgang and Jensen, Lars and Jupe, Marco (2006) Damage threshold investigations of high-power laser optics under atmospheric and vacuum conditions. In: Boulder Damage Symposium 2006, 38. SPIE. Boulder Damage Symposium XXXVIII, 2006-09-26, Boulder, CO (USA).
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In many cases, optical coatings are the limiting factor for the operational reliability of measurement systems and other technical devices based on laser irradiation. Especially in space applications, the reliability of an optical system is of existential importance. In this context, the behavior of the laser induced damage threshold (LIDT) in vacuum and in atmospheric pressure is of major interest. Initial experiments have shown a loss of performance of coatings that were exposed to vacuum conditions. On the one hand the LIDT at the fundamental wavelength of the Nd:YAG laser (1.064 µm) was determined, and on the other hand damage threshold investigations at the third harmonic of 355nm were performed on equivalent coatings. Compared to normal atmospheric conditions, significantly different spectral characteristics were observed for dielectric coatings, which were produced by various coating processes (electron beam evaporation, ion assisted deposition (IAD) and ion beam sputtering (IBS)), under vacuum. In the present paper the damage mechanisms in the ns range are investigated against the background of the experimental results attained for the different environments.
|Document Type:||Conference or Workshop Item (Poster)|
|Title:||Damage threshold investigations of high-power laser optics under atmospheric and vacuum conditions|
|Journal or Publication Title:||Boulder Damage Symposium 2006|
|In ISI Web of Science:||No|
|Series Name:||Boulder Damage Symposium|
|Keywords:||coating processes, air-vacuum effect, ion assisted deposition, ion beam sputtering|
|Event Title:||Boulder Damage Symposium XXXVIII|
|Event Location:||Boulder, CO (USA)|
|Event Type:||international Conference|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||Aircraft Research|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L AR - Aircraft Research|
|DLR - Research theme (Project):||L - Laser Research and Technology|
|Institutes and Institutions:||Institute of Technical Physics|
|Deposited By:||Wolfgang Riede|
|Deposited On:||12 Oct 2006|
|Last Modified:||27 Apr 2009 13:07|
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