DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2001 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

Q: Quantenoptik

Q 10: Poster: Nonlinear Optics

Q 10.17: Poster

Tuesday, April 3, 2001, 12:30–15:00, AT2

Self- focusing and defocusing in sub-picosecond pulses interaction with dielectrics and laser-induced breakdown — •O. Fedotova1, T. Smirnova1, B. Rethfeld2, O. Khasanov1, K. Sokolowski-Tinten2, and D. von der Linde21Institute of Solid State & Semiconductor Physics, 17 Brovki str., Minsk 220072, Belarus — 2Institut für Laser and Plasmaphysik, Universität Essen, Germany

The non-resonant interaction of high-power femtosecond laser pulses with a Kerr dielectric medium is investigated. The necessity of solving the self-consistent problem for the evolution of both, the pulse field and the medium is shown. The change of the refraction index leads to self-focusing in the medium due to normal (Kerr) dispersion. However, if ionization processes contribute, plasma induced defocusing needs to be included. We compare the results of numerical modelling with experiments. In particular, we will discuss possible reasons for the absence of laser-induced breakdown in bulk media, as observed experimentally [1].
[1] D. von der Linde and H. Schüler, Breakdown Threshold and Plasma Formation in Femtosecond Laser-Solid Interaction, J. Opt. Soc. Am. B 13, pp.216-222 (1996)

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2001 > Berlin