2 December 2014 Modification of multilayer mirror top-layer design for increased laser damage resistance
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Proceedings Volume 9237, Laser-Induced Damage in Optical Materials: 2014; 92371G (2014); doi: 10.1117/12.2068244
Event: SPIE Laser Damage, 2014, Boulder, Colorado, United States
Abstract
This work focuses on the optimization of a high reflector design for operation at 1 μm wavelength to achieve a high laser damage threshold when tested at pulse durations of 0.19 and 4 ns. Different designs that modify the standing wave electric field distribution of a quarter wave Ta2O5/SiO2 multilayer dielectric coating are considered. It is found that the addition of an extra SiO2 quarter wave to reduce the peak electric field in the coating, increases the 50% damage probability by over 100% at both pulse durations.
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D. Schiltz, D. Patel, L. Emmert, C. Baumgarten, B. Reagan, W. Rudolph, J. J. Rocca, C. S. Menoni, "Modification of multilayer mirror top-layer design for increased laser damage resistance", Proc. SPIE 9237, Laser-Induced Damage in Optical Materials: 2014, 92371G (2 December 2014); doi: 10.1117/12.2068244; http://dx.doi.org/10.1117/12.2068244
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KEYWORDS
Coating

Silica

Laser induced damage

Absorption

Multilayers

Laser damage threshold

Resistance

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