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Removal of laser-induced contamination on ALADIN laser optics by UV/ozone cleaning

Bartels, Nils and Allenspacher, Paul and Riede, Wolfgang and Schröder, Helmut and Wernham, Denny (2019) Removal of laser-induced contamination on ALADIN laser optics by UV/ozone cleaning. SPIE. Laser-induced Damage in Optical Materials 2019, 22.-25. Sep. 2019, Broomfield (Boulder area), USA. DOI: 10.1117/12.2535772

Full text not available from this repository.

Abstract

The ESA satellite Aeolus was successfully launched into space in August 2018 and measures global wind profiles using the Atmospheric Laser Doppler Instrument (ALADIN). ALADIN features a high-power UV laser source emitting nanosecond pulses at a wavelength of 355 nm. A crucial step in the development of ALADIN was the mitigation of laser-induced contamination (LIC). In this work we assess the opportunity of removing LIC deposits using UV/ozone cleaning with a mercury lamp. We find that UV/ozone cleaning is a very effective tool for removing laser-induced molecular contamination induced by the volatile components of a material mix representative of the ALADIN laser. Furthermore, we show that optical surfaces on which a contamination is removed via UV/ozone cleaning behave similar to pristine optical surfaces with respect to their susceptibility to subsequent LIC as well as laser-induced damage. These results demonstrate that UV/ozone cleaning is a useful and safe way of cleaning optical surfaces after ground-based thermal vacuum/lifetime testing.

Item URL in elib:https://elib.dlr.de/131301/
Document Type:Conference or Workshop Item (Poster)
Title:Removal of laser-induced contamination on ALADIN laser optics by UV/ozone cleaning
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bartels, NilsNils.Bartels (at) dlr.dehttps://orcid.org/0000-0002-9672-7575
Allenspacher, PaulPaul.Allenspacher (at) dlr.deUNSPECIFIED
Riede, WolfgangWolfgang.Riede (at) dlr.deUNSPECIFIED
Schröder, HelmutHelmut.Schroeder (at) dlr.deUNSPECIFIED
Wernham, DennyESA-ESTEC, The NetherlandsUNSPECIFIED
Date:20 November 2019
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.1117/12.2535772
Page Range:pp. 1-10
Publisher:SPIE
Series Name:Proc. SPIE, Laser-induced Damage in Optical Materials 2019
Status:Published
Keywords:Laser-induced contamination, Aeolus, aerospace, laser-induced damage, ozone cleaning, space qualification
Event Title:Laser-induced Damage in Optical Materials 2019
Event Location:Broomfield (Boulder area), USA
Event Type:international Conference
Event Dates:22.-25. Sep. 2019
Organizer:SPIE
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:other
DLR - Research area:Raumfahrt
DLR - Program:R - no assignment
DLR - Research theme (Project):R - no assignment
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics > Active Optical Systems
Deposited By: Bartels, Nils
Deposited On:10 Dec 2019 08:54
Last Modified:10 Dec 2019 08:54

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