Düsseldorf 2007 – scientific programme

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K: Fachverband Kurzzeitphysik

K 2: Poster I - Laseranwendungen

K 2.6: Poster

Monday, March 19, 2007, 16:30–18:30, Poster A

Time-resolved emission spectroscopy of the femtosecond laser-induced breakdown at a water surface — •Christian Sarpe-Tudoran¹, Andreas Assion², Matthias Wollenhaupt¹, Lars Haag¹, Marc Winter¹, Lars Englert¹, and Thomas Baumert¹ — ¹Universität Kassel, Institut für Physik, Heinrich-Plett-Str. 40, D-34132 Kassel — ²Femtolasers Produktions GmbH, Fernkorngasse 10, A-1100 Wien

The importance of the femtosecond laser induced breakdown in aqueous media comes from the applications of ultrahort-puls lasers in precise ablation of biological tissue, therapeutic laser medicine and chemical analysis [1]. The spectral emission of the breakdown plasma contains information about the laser-matter interaction process and the nature of the ablated medium [2]. Previous studies [3] have shown a dynamics of the breakdown plasma on the ps-time scale. By using an optical Kerr shutter the transient breakdown plasma emission spectra is now obtained with a temporal resolution not yet achieved and important parameters like the early stage plasma temperature are deduced.

[1] A. Vogel, J. Noack, G. Hüttman, G. Paltauf, Appl. Phys. B 81, 1015 (2005)

[2] A. Assion, M. Wollenhaupt, L. Haag, F. Mayorov, C. Sarpe-Tudoran, M. Winter, U. Kutschera and T. Baumert, Appl.Phys.B 77, 4 (2003)

[3] C. Sarpe-Tudoran, A. Assion, M.Wollenhaupt, M. Winter and T. Baumert, Appl. Phys. Lett. 88, 261109 (2006)