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Impact of the Polishing Suspension Concentration on Laser Damage of Classically Manufactured and Plasma Post-Processed Zinc Crown Glass Surfaces

  • The laser-induced damage threshold of optics is an issue of essential importance in high-power laser applications. However, the complex and partially interacting mechanisms as well as the underlying reasons for laser damage of glass surfaces are not yet fully understood. The aim of the present work is to contribute to a better understanding of such damage mechanisms by providing original results on the impact of classical glass surface machining on the laser-induced damage threshold. For this purpose, glass samples were prepared with well-defined process conditions in terms of the used lapping and polishing agents and suspensions. Further, the samples were post-processed by atmospheric pressure plasma for precision cleaning. The laser-induced damage threshold and surface contamination by residues from the manufacturing process were determined before and after plasma post-processing. It is shown that the polishing suspension concentration has a certain impact on the laser-induced damage threshold and surface contamination by residues from used working materials. The highest damage threshold of 15.2 J/cm² is found for the lowest surface contamination by carbon which occurs in the case of the highest polishing suspension concentration. After plasma treatment for merely 60 s, this value was increased to 20.3 J/cm² due to the removal of surface-adherent carbon. The results thus imply that the laser-induced damage threshold can notably be increased by first choosing appropriate process parameters during classical manufacturing and second plasma post-processing for surface finishing.

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Metadaten
Author:Christoph GerhardORCiD, Marco Stappenbeck
URN:urn:nbn:de:kobv:526-opus4-10556
DOI:https://doi.org/10.3390/app8091556
ISSN:2076-3417
Parent Title (English):Applied Sciences
Publisher:MDPI
Document Type:Article
Language:English
Year of Publication:2018
Publishing Institution:Technische Hochschule Wildau
Release Date:2018/10/09
Volume:8
Issue:9
First Page:1
Last Page:15
Source:Gerhard, C., & Stappenbeck, M. (2018). Impact of the polishing suspension concentration on laser damage of classically-manufactured and plasma post-processed zinc crown glass surfaces Applied Sciences. 8 (9).
Faculties an central facilities:Fachbereich Ingenieur- und Naturwissenschaften
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 62 Ingenieurwissenschaften / 621 Angewandte Physik
Funding:DFG-geförderter Publikationsfonds
Licence (German):Creative Commons - CC BY - Namensnennung 4.0 International
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