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Multichannel laser-induced contamination test bench

Schroeder, Helmut and Bataviciute, Gintare and Cichon, Karl and Balasa, Istvan and Jensen, Lars and Riede, Wolfgang and Tighe, Adrian (2012) Multichannel laser-induced contamination test bench. SPIE Laser Damage, 23.-26.Sept. 2012, Boulder, USA. (Unpublished)

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Lifetime enhancement of optical components is still one of the major topics in space based laser applications. In this paper a novel multichannel test setup for basic research of laser- induced contamination (LIC) phenomena is introduced. Main part of the setup is an ultra-high vacuum chamber with a contamination source similar to a Knudsen cell, which offers the possibility to apply constant partial pressure of pure contamination material throughout the whole time of testing. Up to three different optical samples can be tested simultaneously under identical experimental conditions. As laser source a diode pumped Nd:YAG system with frequency doubling and tripling is used. It provides 10 ns pulses with a repetition rate between 1 and 1000 Hz and 2.5 mJ pulse energy for 355 nm. Contamination growth is monitored online by transmission and fluorescence detection. LIC growth dynamic was analysed in dependence on laser fluence and repetition rate. Uncoated and HR and AR coated fused silica optics were investigated. The coatings were produced by different processes: e-beam, Ion Beam Sputtering, and Magnetron Sputtering. The influence of coating morphology and composition on LIC growth is discussed.

Item URL in elib:https://elib.dlr.de/79382/
Document Type:Conference or Workshop Item (Speech)
Title:Multichannel laser-induced contamination test bench
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schroeder, Helmuthelmut.schroeder (at) dlr.deUNSPECIFIED
Bataviciute, GintareGintare.Bataviciute (at) ff.stud.vu.ltUNSPECIFIED
Cichon, Karlkarl.cichon (at) dlr.deUNSPECIFIED
Balasa, Istvani.balasa (at) lzh.deUNSPECIFIED
Jensen, Larsl.jensen (at) lzh.deUNSPECIFIED
Riede, Wolfgangwolfgang.riede (at) dlr.deUNSPECIFIED
Tighe, AdrianAdrian.Tighe (at) esa.intUNSPECIFIED
Date:September 2012
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:laser-induced contamination, coating
Event Title:SPIE Laser Damage
Event Location:Boulder, USA
Event Type:international Conference
Event Dates:23.-26.Sept. 2012
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Laser Research and Technology (old)
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics > Active Optical Systems
Deposited By: Schröder, Dr.rer.nat. Helmut
Deposited On:10 Dec 2012 21:44
Last Modified:10 Dec 2012 21:44

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