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Proceedings Paper

Laser conditioning of UV anti-reflective optical coatings for applications in aerospace
Author(s): Nils Bartels; Paul Allenspacher; Wolfgang Riede
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Paper 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 μm), 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.

Paper Details

Date Published: 16 November 2018
PDF: 9 pages
Proc. SPIE 10805, Laser-Induced Damage in Optical Materials 2018: 50th Anniversary Conference, 108051Q (16 November 2018); doi: 10.1117/12.2326782
Show Author Affiliations
Nils Bartels, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Paul Allenspacher, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Wolfgang Riede, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)


Published in SPIE Proceedings Vol. 10805:
Laser-Induced Damage in Optical Materials 2018: 50th Anniversary Conference
Christopher Wren Carr; Gregory J. Exarhos; Vitaly E. Gruzdev; Detlev Ristau; M.J. Soileau, Editor(s)

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