Journal
OPTICS EXPRESS
Volume 27, Issue 15, Pages 20383-20396Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.27.020383
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Funding
- European Research Council (ERC) [682978]
- French National Research Agency (ANR) [14-CE32-0014]
- Conseil Regional Aquitaine (RECHIRAM)
- European Research Council (ERC) [682978] Funding Source: European Research Council (ERC)
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Recent progresses in femtosecond ytterbium-doped fiber laser technology are opening new perspectives in strong field physics and attosecond science. High-order harmonic generation from these systems is particularly interesting because it provides high flux beams of ultrashort extreme ultraviolet radiation. A great deal of effort has been devoted to optimize the macroscopic generation parameters. Here we investigate the possibility of enhancing the single-atom response by producing high-order harmonics from the second, third and fourth harmonics of a turnkey 50 W, 166 kHz femtosecond Yb-fiber laser providing 135 fs pulses at 1030 nm. We show that the harmonic efficiency is optimal when the process is driven by the third harmonic, producing 6.6 +/- 1.3 x 10(14) photons/s at 18 eV in argon, which corresponds to 1.9 +/- 0.4 mW average power. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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