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Kvantovaya Elektronika, 2013, Volume 43, Number 8, Pages 731–734 (Mi qe15142)  

Interaction of laser radiation with matter

Effect of laser pulse repetition frequency on the optical breakdown threshold of quartz glass

T. V. Kononenkoa, S. Schöneseiffenb, V. I. Konova, F. Dausingerb

a Natural Sciences Center at General Physics Institute of RAS
b Dausinger + Giesen GmbH, Stuttgart, Germany

Abstract: The thresholds of optical breakdown in the volume of quartz glass were measured in relation to the number of pulses under irradiation by ultrashort laser pulses with different pulse repetition frequencies (1 – 400 kHz). Increasing this frequency from 10 to 400 kHz was found to substantially lower the breakdown threshold for 500-fs long pulses (at a wavelength of 1030 nm) and to lower to a smaller degree for 5-ps long pulses (515 nm). A strong frequency dependence of the breakdown threshold is observed under the same conditions as a manifold decrease of the breakdown threshold with increase in the number of pulses in a pulse train. The dependence of the optical breakdown on the number of pulses is attributable to the accumulation of point defects under multiple subthreshold irradiation, which affects the mechanism of collisional ionisation. In this case, the frequency dependence of the breakdown threshold of quartz glass is determined by the engagement of shortlived defects in the ionisation mechanism.

Keywords: ultrashort pulses, optical breakdown, quartz glass.

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English version:
Quantum Electronics, 2013, 43:8, 731–734

Bibliographic databases:

PACS: 42.70.Ce, 79.20.Ds
Received: 01.02.2013
Revised: 06.03.2013

Citation: T. V. Kononenko, S. Schöneseiffen, V. I. Konov, F. Dausinger, “Effect of laser pulse repetition frequency on the optical breakdown threshold of quartz glass”, Kvantovaya Elektronika, 43:8 (2013), 731–734 [Quantum Electron., 43:8 (2013), 731–734]

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  • Квантовая электроника Quantum Electronics
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