Increasing the Laser-Induced Damage Threshold of Optical Components by Atmospheric Pressure Plasma Surface Finishing

In this contribution, a plasma-based approach for finishing optics surfaces is introduced. Experiments were performed on classically manufactured zinc crown glass and sapphire. It is shown that the use of direct dielectric barrier discharge plasma at atmospheric pressure allows the removal of surfac...

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Bibliographic Details
Published in:EPJ Web of Conferences 2019, Vol.215, p.1003
Main Authors: Gerhard, Christoph, Stappenbeck, Marco, Tasche, Daniel
Format: Article
Language:English
Subjects:
Atmospheric pressure
Cleaning
Dielectric barrier discharge
Laser damage
Optical components
Plasma
Sapphire
Surface finishing
Surface roughness
Yield point
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Summary:In this contribution, a plasma-based approach for finishing optics surfaces is introduced. Experiments were performed on classically manufactured zinc crown glass and sapphire. It is shown that the use of direct dielectric barrier discharge plasma at atmospheric pressure allows the removal of surface-adherent carbonaceous contaminations that were induced by classical manufacturing. Moreover, the use of such plasma leads to a certain decrease in surface roughness. Both effects, surface cleaning and smoothing finally increase the laser-induced damage threshold of optical components.
ISSN:2100-014X
2101-6275
2100-014X
DOI:10.1051/epjconf/201921501003