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Q: Fachverband Quantenoptik und Photonik
Q 49: Ultrakurze Pulse: Anwendungen II
Q 49.5: Talk
Thursday, March 5, 2009, 15:00–15:15, VMP 6 HS-A
First Demonstration of High Harmonic Generation (HHG) in a Hollow-Core Photonic Crystal Fiber — •T. Südmeyer1, O. H. Heckl1, C. R. E. Baer1, C. Kränkel1, S. V. Marchese1, F. Schapper1, M. Holler1, U. Keller1, J. S. Robinson2, J. W. G. Tisch2, F. Couny3, P. Light3, F. Benabid3, and P. St. J. Russell4 — 1Department of Physics, Institute of Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland — 2Quantum Optics and Laser Science (QOLS), Blackett Laboratory, Imperial College London, London SW7 2BW, UK — 3Department of Physics, University of Bath, Bath BA2 7AY, UK — 4Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg, D-91058 Erlangen, Germany
We present for the first time the generation of high harmonic radiation in a hollow-core photonic crystal fiber (HC-PCF). The threshold energy for HHG in xenon was shown to be as low as 440 nJ using a Ti:sapphire amplifier operating at a repetition rate of 1 kHz with a pulse duration of 30 fs. We observed harmonics from the 7th to the 13th order, located in the wavelength range of 50-130 nm. Similar laser pulse energies are today well achievable by diode pumped solid-state lasers operating at multi MHz repetition rates. The increase in repetition rate by more than a factor of thousand compared to typical Ti:sapphire amplifier systems has great potential for substantially increasing the available average photon flux in the VUV and XUV spectral region. Furthermore, it is expected that the efficiency can be significantly enhanced by guiding and improved phase-matching using optimized dispersion engineering in PCFs.