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Single-pass high-harmonic generation at 20.8 MHz repetition rate

 
: Vernaleken, A.; Weitenberg, J.; Sartorius, T.; Russbueldt, P.; Schneider, W.; Stebbings, S.L.; Kling, M.F.; Hommelhoff, P.; Hoffmann, H.-D.; Poprawe, R.; Krausz, F.; Hänsch, T.W.; Udem, T.

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Optics Letters 36 (2011), Nr.17, S.3428-3430
ISSN: 0146-9592
Englisch
Zeitschriftenaufsatz
Fraunhofer ILT ()

Abstract
We report on single-pass high-harmonic generation (HHG) with amplified driving laser pulses at a repetition rate of 20.8 MHz. An Yb:YAG Innoslab amplifier system provides 35 fs pulses with 20 W average power at 1030 nm after external pulse compression. Following tight focusing into a xenon gas jet, we observe the generation of high-harmonic radiation of up to the seventeenth order. Our results show that state-of-the-art amplifier systems have become a promising alternative to cavity-assisted HHG for applications that require high repetition rates, such as frequency comb spectroscopy in the extreme UV.

: http://publica.fraunhofer.de/dokumente/N-180241.html