Femtosecond laser pulse train interaction with dielectric materials

The interaction of trains of femtosecond microjoule laser pulses with dielectric materials by means of a multi-scale model is investigated. Theoretical predictions are directly confronted with experimental observations in soda-lime glass. It is shown that due to the low heat conductivity, a signific...

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Veröffentlicht in:Applied physics letters 2015-11, Vol.107 (18)
Hauptverfasser: Dematteo Caulier, O., Mishchik, K., Chimier, B., Skupin, S., Bourgeade, A., Javaux Léger, C., Kling, R., Hönninger, C., Lopez, J., Tikhonchuk, V., Duchateau, G.
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Sprache:eng
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Zusammenfassung:The interaction of trains of femtosecond microjoule laser pulses with dielectric materials by means of a multi-scale model is investigated. Theoretical predictions are directly confronted with experimental observations in soda-lime glass. It is shown that due to the low heat conductivity, a significant fraction of the laser energy can be accumulated in the absorption region. Depending on the pulse repetition rate, the material can be heated to high temperatures even though the single pulse energy is too low to induce a significant material modification. Regions heated above the glass transition temperature in the simulations correspond very well to zones of permanent material modifications observed in the experiments. It turns out that pulse-to-pulse variations of the laser absorption are negligible and of minor influence to permanent material modifications.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4935119