31 December 2009 Laser damage resistant pits in dielectric coatings created by femtosecond laser machining
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Abstract
Replacing growing damage sites with benign, laser damage resistant features in multilayer dielectric films may enable large mirrors to be operated at significantly higher fluences. Laser damage resistant features have been created in high reflecting coatings on glass substrates using femtosecond laser machining. These prototype features have been damage tested to over 40 J/cm2 (1064nm, 3ns pulselength) and have been shown not to damage upon repeated irradiation at 40J/cm2. Further work to optimize feature shape and laser machining parameters is ongoing.
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Justin Wolfe, Justin Wolfe, Roger Qiu, Roger Qiu, Christopher Stolz, Christopher Stolz, Michael Thomas, Michael Thomas, Carolyn Martinez, Carolyn Martinez, Arzu Ozkan, Arzu Ozkan, } "Laser damage resistant pits in dielectric coatings created by femtosecond laser machining", Proc. SPIE 7504, Laser-Induced Damage in Optical Materials: 2009, 750405 (31 December 2009); doi: 10.1117/12.836906; https://doi.org/10.1117/12.836906
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