title: Direct comparison of kilohertz- and megahertz-repetition-rate femtosecond damage threshold.
abstract: We performed femtosecond laser-induced damage threshold (fs LIDT) measurements with substantially different repetition rate Ti:sapphire laser systems: a 1 kHz regenerative amplifier and a 4.3 MHz long-cavity oscillator. All other pulse parameters are kept the same. Comparative measurements of a dielectric high reflector, a chirped mirror, and metallic mirrors show at least a factor of 2.7 lower fs LIDT at megahertz repetition rates. We attribute this to thermally assisted damage mechanisms supported by complex heat transfer simulations.
authors.forename: B J
authors.initials: BJ
authors.lastname: Nagy
authors.forename: L
authors.initials: L
authors.lastname: Gallais
authors.forename: L
authors.initials: L
authors.lastname: Vámos
authors.forename: D
authors.initials: D
authors.lastname: Oszetzky
authors.forename: P
authors.initials: P
authors.lastname: Rácz
authors.forename: P
authors.initials: P
authors.lastname: Dombi