Düsseldorf 2007 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 19: Erzeugung ultrakurzer Lichtimpulse

Q 19.4: Vortrag

Dienstag, 20. März 2007, 11:15–11:30, 5K

Flexible Dispersion Control for Ultrashort Laserpulses — •Georg Gademann, Konstantin Simeonidis und Joachim Ullrich — Max-Planck-Institut für Kernphysik, 69117 Heidelberg

The compression of ultrashort laser pulses by filamentation in a noble gas is an easy and efficient method to approach the one cycle limit for laser pulses. These afterwards can be used to produce single attosecond light pulses through high harmonic generation. Used in pump probe experiments these atto second light pulses yield a higher time resolution. The presented setup for filamentation is based on previous works [1].

On such short time scales it is of particular importance to have good means of compensating dispersion which is introduced by air and optical material. In our case the remaining dispersion is compensated for by a multi level setup. This setup consists of a chirped mirror pair, prism compressor and deformable mirror. Using the combination of those different parts we are able to flexibly react on changing configurations and variation of experimental parameters while ensuring optimal compression. Furthermore active pulse shaping is also possible.

Particularly innovative is the use of the deformable mirror, wherein the spectral phase information measured by ZAP-SPIDER method can be directly used for compensation. Especially residual higher order chirp can efficiently be adjusted.

[1] C.P.Hauri and J.Biegert and U.Keller Generation of intense view-cycle laser pulses through filamentation - parameter dependence Optics Express 19 7541-7547 (2005)