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Laser-induced contamination on high-reflective optics

Wagner, Paul (2014) Laser-induced contamination on high-reflective optics. Masterarbeit, Hochschule Darmstadt.

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Kurzfassung

Operating high power space-based laser systems in the visible and UV range is problematic due to laser-induced contamination. Organic materials are outgassing in vacuum and deposit on irradiated optical components. To provide reliable space-based laser systems the optical components quality plays a major role. In this thesis laser-induced contamination growth on high-reflective coated optics is investigated for UV irradiation of 355nm with naphthalene as contamination material. Four different kinds of optics were investigated: three high-reflective coated optics fabricated by Electron Beam Deposition, Magnetron Sputtering and Ion Beam Sputtering technique and one anti-reflective coated optic fabricated by Electron Beam Deposition technique. The contamination test procedure was designed to perform laser-induced contamination tests on 45° high-reflective coated optics. For the first time in-situ observation of contamination induced damage was performed using a long distance microscope. Additionally the onset and evolution of deposit formation and contamination induced damage of optical samples was observed by in-situ laser-induced fluorescence and reflection monitoring. Ex-situ characterization of deposits and damage morphology was performed by differential interference contrast microscopy and fluorescence microscopy. It was found that at a partial pressure of contamination material in the range of 10E-5mbar induced a drastic reduction of laser damage threshold compared to values obtained without contamination.

elib-URL des Eintrags:https://elib.dlr.de/88540/
Dokumentart:Hochschulschrift (Masterarbeit)
Titel:Laser-induced contamination on high-reflective optics
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Wagner, Paulpaul.wagner (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:Februar 2014
Referierte Publikation:Ja
Open Access:Ja
Seitenanzahl:72
Status:nicht veröffentlicht
Stichwörter:LIC, laser-induced contamination, UV laser, damage morphology, high-reflective optics, coating techniques, contamination growth, naphthalene, long distance microscope, fluorescence, damage threshold
Institution:Hochschule Darmstadt
Abteilung:Fachbereich für Mathematik und Naturwissenschaften
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler (alt)
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Laserforschung und -technologie (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Physik > Aktive optische Systeme
Hinterlegt von: Wagner, Dr. Paul
Hinterlegt am:08 Aug 2014 06:52
Letzte Änderung:31 Jul 2019 19:45

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