Abstract
The conversion of 34-fs Ti:sapphire laser pulses into the wavelength region 105–210 nm has been studied in xenon for laser intensities up to 5×1013 W/cm2. A strongly structured, pressure-dependent emission spectrum is observed. Radiation is detected in regions expected for the 5th and 7th harmonics but also in regions in between. In the resonance region (λ<147 nm), self-phase-modulation processes in the conversion medium together with phase-matched, efficient harmonic generation in negative-dispersive spectral regions explain the observations. Broadband emission is detected in the resonance-free, positive-dispersive spectral region 155–210 nm. Emission from the xenon dimer is superimposed on a ‘direct’ 5th-harmonic signal.
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32.70.-n; 32.80.-t; 42.65.Ky; 42.65.Re
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Kutzner, J., Tsilimis, G. & Zacharias, H. Harmonic generation in the discrete spectral region of xenon using broadband femtosecond laser pulses. Appl. Phys. B 80, 203–210 (2005). https://doi.org/10.1007/s00340-004-1709-x
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DOI: https://doi.org/10.1007/s00340-004-1709-x