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Laser conditioning of UV anti-reflective optical coatings for applications in aerospace

Bartels, Nils and Allenspacher, Paul and Riede, Wolfgang (2018) Laser conditioning of UV anti-reflective optical coatings for applications in aerospace. Laser-Induced Damage in Optical Materials 2018: 50th Anniversary Conference, Boulder, CO, USA.

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Official URL: http://dx.doi.org/10.1117/12.2326782

Abstract

In this work we study the effect of laser conditioning on laser-induced damage of ion-beam sputtered, anti-reflection coated laser optics with ns-pulsed laser radiation at a wavelength of 355 nm. With respect to applications in aerospace, measurements were performed under high vacuum. At laser fluences below 20 J/cm2, laser-induced damage appears as pin-point damage (small explosion pits with sizes in the range of 1 micro-meter), sometimes referred to as "grey haze". We find that ramped laser conditioning is an effective tool to reduce not only the abundance but also the average size of pin-point damage at laser fluences exceeding the optic’s unconditioned laser-induced damage threshold. We discuss our results in the context of the small absorber model for damage crater formation.

Item URL in elib:https://elib.dlr.de/123937/
Document Type:Conference or Workshop Item (Poster)
Title:Laser conditioning of UV anti-reflective optical coatings for applications in aerospace
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bartels, NilsNils.Bartels (at) dlr.deUNSPECIFIED
Allenspacher, PaulPaul.Allenspacher (at) dlr.deUNSPECIFIED
Riede, WolfgangWolfgang.Riede (at) dlr.deUNSPECIFIED
Date:29 November 2018
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:p. 60
Status:Published
Keywords:Laser-induced damage, ion-beam sputtering, anti-reflection coating, aerospace, radiation, crater formation
Event Title:Laser-Induced Damage in Optical Materials 2018: 50th Anniversary Conference
Event Location:Boulder, CO, USA
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Sicherheitsrelevante Erdbeobachtung
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics
Deposited By: Bartels, Nils
Deposited On:29 Nov 2018 14:57
Last Modified:31 Jul 2019 20:21

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