Bochum 2015 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

P: Fachverband Plasmaphysik

P 28: Laser Plasmas II

P 28.3: Vortrag

Donnerstag, 5. März 2015, 17:00–17:15, HZO 50

Generation of ultra-short high-power laser pulses via strongly-coupled Brillouin amplification — •Friedrich Schluck, Götz Lehmann, and Karl-Heinz Spatschek — Institut für Theoretische Physik I, Heinrich-Heine Universität, 40225 Düsseldorf, Germany

Amplification of ultra-short laser pulses via strongly-coupled Brillouin scattering is a promising technique for the generation of multi-Petawatt to Exawatt laser pulses. Energy is transferred from a long pump pulse (ps to ns duration) to a short seed pulse (about 100fs duration) via a resonant interaction with an ion quasi-mode. We present an envelope model to investigate this process in multi-dimensional geometry. In particular we focus on the influence of a frequency chirp of the pump pulse. The chirp affects the resonance condition for frequency matching of pump, seed and plasma wave and thus the energy transfer from pump to seed. On the one hand a residual chirp will always be present in experiments, on the other hand, we find that artificially chirping the pump pulse may increase the amplification efficiency in the nonlinear phase of the amplification process.