High-order harmonic generation at a megahertz-level repetition rate directly driven by an ytterbium-doped-fiber chirped-pulse amplification system.

Authors:
Johan Boullet
Johan Boullet
Université de Bordeaux-CNRS-CEA
France
Yoann Zaouter
Yoann Zaouter
Université Paris-Sud
France
Jens Limpert
Jens Limpert
Institute of Applied Physics
Stephane Petit
Stephane Petit
Laboratory of Molecular Oral Pathophysiology
Yann Mairesse
Yann Mairesse
Lund Institute of Technology
Sweden
Baptiste Fabre
Baptiste Fabre
Université de Bordeaux-CNRS-CEA
France
Julien Higuet
Julien Higuet
Université de Bordeaux-CNRS-CEA
France

Opt Lett 2009 May;34(9):1489-91

Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications (CELIA), 351 cours de la Libération F-33405 Talence, France.

We report the first experimental demonstration (to our knowledge) of high-order harmonic generation in rare gases driven by a state-of-the-art high-power Yb-doped-fiber chirped-pulse amplification system. The fiber laser delivers 270 fs pulses in the 30-100 microJ energy range at repetition rates varying from 100 kHz to 1 MHz. A proper focalization allows reaching several 10(13) W/cm2 in a gas jet. We have been able to produce and detect harmonics up to order 31 (33.2 nm) in Ar at a 100 kHz repetition rate. High-order harmonic generation at 1 MHz is also demonstrated in Xe up to harmonic 15. The demonstrated extreme UV (XUV) source will bring ultrashort XUV coincidence experiments from synchrotron facilities to tabletop laboratories.

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May 2009
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