Journal
OPTICS EXPRESS
Volume 19, Issue 20, Pages 19374-19383Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.19.019374
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Funding
- German Federal Ministry of Education and Research (BMBF) [05 ES7GU1]
- Helmholtz Institute Jena
- European Research Council under the European Union [(FP7/2007-2013)/ERC, 240460]
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The process of high harmonic generation allows for coherent transfer of infrared laser light to the extreme ultraviolet spectral range opening a variety of applications. The low conversion efficiency of this process calls for optimization or higher repetition rate intense ultrashort pulse lasers. Here we present state-of-the-art fiber laser systems for the generation of high harmonics up to 1 MHz repetition rate. We perform measurements of the average power with a calibrated spectrometer and achieved mu W harmonics between 45 nm and 61 nm (H23-H17) at a repetition rate of 50 kHz. Additionally, we show the potential for few-cycle pulses at high average power and repetition rate that may enable water-window harmonics at unprecedented repetition rate. (C) 2011 Optical Society of America
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