6 December 2016 Laser-matter coupling mechanisms governing particulate-induced damage on optical surfaces
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Abstract
A comprehensive study of laser-induced damage associated with particulate damage on optical surfaces is presented. Contaminant-driven damage on silica windows and multilayer dielectrics is observed to range from shallow pitting to more classical fracture-type damage, depending on particle-substrate material combination, as well as laser pulse characteristics. Ejection dynamics is studied in terms of plasma emission spectroscopy and pump-probe shadowgraphy. Our data is used to assess the momentum coupling between incident energy and the ejected plasma, which dominates the laser-particle-substrate interaction. Beam propagation analysis is also presented to characterize the impact of contaminant-driven surface pitting on optical performance.
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M. J. Matthews, E. Feigenbaum, S. G. Demos, R. N. Raman, S. R. Qiu, N. Shen, C. Harris, R. A. Negres, M. Norton, D. Cross, A. M. Rubenchik, "Laser-matter coupling mechanisms governing particulate-induced damage on optical surfaces", Proc. SPIE 10014, Laser-Induced Damage in Optical Materials 2016, 1001402 (6 December 2016); doi: 10.1117/12.2244981; https://doi.org/10.1117/12.2244981
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