Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 13: Ultrashort Laser Pulses: Generation II
Q 13.6: Vortrag
Montag, 8. März 2010, 17:45–18:00, F 342
High peak and average power few-cycle OPCPA system — •Stefan Demmler1, Jan Rothhardt1, Steffen Hädrich1, Enrico Seise1, Franz Tavella2, Arik Willner2, Stefan Düsterer2, Holger Schlarb2, Josef Feldhaus2, Jens Limpert1,3, Jörg Rossbach2, and Andreas Tünnermann1,3 — 1Friedrich Schiller University, Institute of Applied Physics, Jena, Germany — 2Deutsches Elektronensynchrotron DESY, Hamburg, Germany — 3Helmholtz Institute, Jena, Germany
Processes initiated by coherent XUV radiation have found interesting applications. Such photons are typically yielded via high harmonic generation, which suffers from low conversion efficiency. To increase the photon count, high repitition rate driver systems are required. The combination of parametric and chirped pulse amplification seems to be to date the only technique to amplify sub 10fs pulses to highest average powers. To further increase the average power of OPCPA systems, the pump power needs to be increased. This can easily be done by fiber CPA systems. We report on an OPCPA system, which uses two stage OPA and reaches 5.7GW peak power with sub 10fs pulses at a repitition rate of 96kHz (6.7W average power). The peak power of this system could be further enhanced by compressing the pulses to their transform limit, which is not trivial. A technique to obtain FT limited pulses is the multiphoton intrapulse interference phase scan method, which has been used to compress 12fs pulses from a Ti:Sa oscillator to 1% of their FT limit. We show the flexibility for implementation in a few-cycle OPCPA system with peak powers >10GW.