Direct comparison of kilohertz- and megahertz-repetition-rate femtosecond damage threshold

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 diel...

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Bibliographic Details
Published in:Optics letters 2015-06, Vol.40 (11), p.2525-2528
Main Authors: Nagy, B J, Gallais, L, Vámos, L, Oszetzky, D, Rácz, P, Dombi, P
Format: Article
Language:English
Subjects:
Damage
Femtosecond
Laser damage
Lasers
Optics
Oscillators
Physics
Reflectors
Repetition
Thresholds
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Summary: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.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.40.002525