Four-dimensional investigation of the 2nd order volume autocorrelation technique

University of Crete Department of Physics P.O. Box 2208 71003 Heraklion, Crete Greece
Applied Physics B (Impact Factor: 1.78). 01/2009; 97(2):505-510. DOI: 10.1007/s00340-009-3559-z

ABSTRACT The 2nd order volume autocorrelation technique, widely utilized in directly measuring ultra-short light pulses durations,
is examined in detail via model calculations that include three-dimensional integration over a large ionization volume, temporal
delay and spatial displacement of the two beams of the autocorrelator at the focus. The effects of the inherent displacement
to the 2nd order autocorrelation technique are demonstrated for short and long pulses, elucidating the appropriate implementation
of the technique in tight focusing conditions. Based on the above investigations, ahigh accuracy 2nd order volume autocorrelation
measurement of the duration of the 5th harmonic of a 50fs long laser pulse, including the measurement of the carrier wavelength
oscillation, is presented.

  • [Show abstract] [Hide abstract]
    ABSTRACT: We report the observation of the direct two-XUV-photon double ionization of xenon by energetic coherent XUV continuum radiation. The spectrum of the XUV continuum spans from ∼15 to ∼23 eV, for which the two-photon sequential double ionization channel is partially open. The two-XUV-photon process is exploited in a second-order autocorrelation measurement of the temporal width of the continuum radiation, revealing energetic XUV pulses at the border between the atto- and femto-second scales.
    Journal of Physics B Atomic Molecular and Optical Physics 01/2012; 45(7). · 2.03 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The interferometric measurement of an ultrashort optical pulse is demonstrated using three-photon ionization of Xe in a time-of-flight mass spectrometer (MS). This approach allowed measurement of the third-order fringe-resolved autocorrelation trace of an ultrashort optical pulse in the deep-ultraviolet (DUV) region. The pulse can be measured in situ using the same MS that is employed in ultrafast spectroscopy. Sensitivity (>3×107W) was sufficient to measure a DUV pulse used in such applications. This setup has the potential to measure the temporal duration of a broadband (204–306nm) ultrashort optical pulse with no additional distortion in the temporal characteristics.
    Applied Physics B 06/2010; 103(4):789-794. · 1.78 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: We report on the observation of energy-resolved photoelectron (PE) spectra produced via two-extreme-ultraviolet-(XUV)-photon above-threshold ionization (ATI) of argon atoms. The XUV radiation consists of higher-order harmonics generated by the process of the relativistic oscillating mirror (ROM) in high-peak-power laser-pulse interaction with solid targets. The energetic XUV radiation is focused into an argon gas target at intensities high enough to induce two-photon ionization at yields that allow the recording of energy-resolved PE spectra. A clear two-XUV-photon ATI PE peak structure is observed in shot-to-shot measurements. This work is a first step towards a frequency-resolved optical gating-type characterization of attosecond pulse trains emanating from relativistic laser-plasma interactions and thus is important for XUV-pump-XUV-probe applications of these harmonics.
    New Journal of Physics 01/2012; 14. · 4.06 Impact Factor

Full-text (2 Sources)

Available from
Jun 2, 2014