title: Femtosecond laser damage resistance of oxide and mixture oxide optical coatings.
abstract: We report on the laser damage resistance of ion beam-sputtered oxide materials (Al2O3, Nb2O5, HfO2, SiO2, Ta2O5, ZrO2) and mixtures of Al2O3-SiO2, Nb2O5-SiO2, HfO2-SiO2, Ta2O5-SiO2, and ZrO2-SiO2, irradiated by single 500 fs pulses at 1030 nm. Laser-induced damage threshold (LIDT), refractive index, and bandgaps of the single-layer coatings are measured. For pure oxide materials a linear evolution of the LIDT with bandgap is observed. The results are in accordance with our simulations based on photo-ionization and avalanche-ionization. In the case of mixtures, however, deviations from the previous behaviors are evidenced. The evolution of the LIDT as a function of the refractive index is analyzed, and an empirical description of the relation between refractive index and LIDT is proposed.
authors.affiliation: Institut Fresnel, CNRS, Aix-Marseille Université, Ecole Centrale Marseille, Marseille, France.
authors.forename: Benoit
authors.initials: B
authors.lastname: Mangote
authors.forename: Laurent
authors.initials: L
authors.lastname: Gallais
authors.forename: Mireille
authors.initials: M
authors.lastname: Commandré
authors.forename: Mathias
authors.initials: M
authors.lastname: Mende
authors.forename: Lars
authors.initials: L
authors.lastname: Jensen
authors.forename: Henrik
authors.initials: H
authors.lastname: Ehlers
authors.forename: Marco
authors.initials: M
authors.lastname: Jupé
authors.forename: Detlev
authors.initials: D
authors.lastname: Ristau
authors.forename: Andrius
authors.initials: A
authors.lastname: Melninkaitis
authors.forename: Julius
authors.initials: J
authors.lastname: Mirauskas
authors.forename: Valdas
authors.initials: V
authors.lastname: Sirutkaitis
authors.forename: Simonas
authors.initials: S
authors.lastname: Kičas
authors.forename: Tomas
authors.initials: T
authors.lastname: Tolenis
authors.forename: Ramutis
authors.initials: R
authors.lastname: Drazdys