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Mitigating damage precursors to improve the laser resistance of ion-beam sputtered antireflective coatings

Alig, Thimotheus and Bartels, Nils and Balasa, Istvan and Böntgen, Tammo and Ristau, Detlev and Jensen, Lars (2021) Mitigating damage precursors to improve the laser resistance of ion-beam sputtered antireflective coatings. In: Proceedings of SPIE - The International Society for Optical Engineering. International Conference on Space Optics—ICSO 2020, 30. März - 2. Apr. 2021, virtuell. doi: 10.1117/12.2599237. ISSN 0277-786X.

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Official URL: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11852/118521D/Mitigating-damage-precursors-to-improve-the-laser-resistance-of-ion/10.1117/12.2599237.full

Abstract

We manufactured and tested ion beam sputtered antireflection coatings for 355 nm using several defect mitigation strategies to improve the damage resistance of laser optics for LIDAR satellite missions. The first approach to avoid the damage precursors in the film is based on a secondary ion source. The goal is to remove the particles that settle on the surface of the growing film. A second strategy is to avoid the damage precursors in the ultraviolet wavelength range by laser conditioning of the thin films during the coating process. A laser beam at the application wavelength scans the deposited layer on the sample during deposition still in vacuum. Optical coatings produced with both technologies show a significantly increased damage threshold when tested in ramped raster scan tests.

Item URL in elib:https://elib.dlr.de/142972/
Document Type:Conference or Workshop Item (Speech)
Title:Mitigating damage precursors to improve the laser resistance of ion-beam sputtered antireflective coatings
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Alig, ThimotheusLaser Zentrum HannoverUNSPECIFIED
Bartels, NilsNils.Bartels (at) dlr.deUNSPECIFIED
Balasa, Istvani.balasa (at) lzh.deUNSPECIFIED
Böntgen, TammoTammo.Böntgen (at) lzh.deUNSPECIFIED
Ristau, DetlevLaser Zentrum HanoverUNSPECIFIED
Jensen, LarsLaser Zentrum Hanover, Hanover, GermanyUNSPECIFIED
Date:June 2021
Journal or Publication Title:Proceedings of SPIE - The International Society for Optical Engineering
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI :10.1117/12.2599237
ISSN:0277-786X
Status:Published
Keywords:Laser-induced damage, antireflection coatings, ultraviolet spectral range, ion beam sputtering, aluminum oxide, silicon dioxide, damage precursors, ramped raster scan tests
Event Title:International Conference on Space Optics—ICSO 2020
Event Location:virtuell
Event Type:international Conference
Event Dates:30. März - 2. Apr. 2021
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:12 Jul 2021 13:56
Last Modified:22 Feb 2022 11:14

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