Abstract

We report on single-pass high-harmonic generation (HHG) with amplified driving laser pulses at a repetition rate of 20.8MHz. An Yb:YAG Innoslab amplifier system provides 35fs pulses with 20W average power at 1030nm 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.

© 2011 Optical Society of America

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