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The physics in applications of ultrafast lasers

: Wortmann, D.; Reinighaus, M.; Finger, J.; Dold, C.; Russbueldt, P.; Poprawe, R.


Tománek, P ; Czech and Slovak Society for Photonics -CSSF-; European Optical Society -EOS-:
Photonics, devices, and systems V : 24 - 26 August 2011, Prague, Czech Republic ; Seventh Photonics Prague 2011 Conference
Bellingham, WA: SPIE, 2011 (SPIE Proceedings 8306)
ISBN: 978-0-8194-8953-1
ISSN: 0038-7355
Nr. 830603, 6 S.
International Conference on Photonics, Devices, and Systems <7, 2011, Prague>
Fraunhofer ILT ()

High precision and high throughput material processing using ultrashort pulsed laser radiation of high average power requires a detailed understanding of the laser matter interaction on ultrafast time scales. In this paper, we will focus on energy transport mechanisms based on the two-temperature-model and the resulting ablation regimes for single pulses. Heat accumulation at high pulse repetition rates and spatial pulse overlap will be discussed. Additional, a novel nonthermal ablation mechanism for graphite and corresponding materials will be presented.