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22 November 2011 Investigation of the laser-induced damage of dispersive coatings
Ivan B. Angelov, Aaron von Conta, Sergei A. Trushin, Zsuzsanna Major, Stefan Karsch, Ferenc Krausz, Vladimir Pervak
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Proceedings Volume 8190, Laser-Induced Damage in Optical Materials: 2011; 81900B (2011) https://doi.org/10.1117/12.899116
Event: SPIE Laser Damage, 2011, Boulder, Colorado, United States
Abstract
Different dispersive coatings were tested in terms of laser-induced damage threshold by using a Ti:Sapphire laser yielding 1 mJ, 30 fs pulses at 500 Hz repetition rate at 790 nm central wavelength. The beam was focused down to 140 μm. Single layer coatings of Au, Ag, Nb2O5, SiO2, Ta2O5 and mixtures of Ta2O5 and silica were examined as well as different dispersive coatings. We observed a direct dependence of the damage threshold on the band gap of the materials used to produce the different samples. The damage threshold values for the dispersive coatings employing the same high index material lay within a range of 30% of each other.
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Ivan B. Angelov, Aaron von Conta, Sergei A. Trushin, Zsuzsanna Major, Stefan Karsch, Ferenc Krausz, and Vladimir Pervak "Investigation of the laser-induced damage of dispersive coatings", Proc. SPIE 8190, Laser-Induced Damage in Optical Materials: 2011, 81900B (22 November 2011); https://doi.org/10.1117/12.899116
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KEYWORDS
Silica
Laser damage threshold
Laser induced damage
Metals
Dielectrics
Gold
Mirrors
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