• High Power Laser Science and Engineering
  • Vol. 4, Issue 2, 02000e17 (2016)
Keisuke Kaneshima, Kengo Takeuchi, Nobuhisa Ishii, and Jiro Itatani
Author Affiliations
  • The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8581, Japan
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    Schematic of the experimental setup. Note that the beams are all vertically polarized. The Brewster windows of the gas-filled cell are tilted vertically.
    Fig. 1. Schematic of the experimental setup. Note that the beams are all vertically polarized. The Brewster windows of the gas-filled cell are tilted vertically.
    (a) Measured reflectivity and (b) group delay of the band-stop mirror.
    Fig. 2. (a) Measured reflectivity and (b) group delay of the band-stop mirror.
    Relative group delays of 1-m-long air (black line), 0.5-mm-thick fused silica (red line) and 0.7-mm-thick $\text{CaF}_{2}$ (blue dashed line).
    Fig. 3. Relative group delays of 1-m-long air (black line), 0.5-mm-thick fused silica (red line) and 0.7-mm-thick $\text{CaF}_{2}$ (blue dashed line).
    Results of SHG-FROG measurement. (a), (b) Measured and reconstructed FROG traces, respectively. (c) Retrieved temporal intensity profile (measured: 6.5 fs, transform-limited case: 4.6 fs), (d) Intensity spectrum measured by a spectrometer (black line), retrieved spectrum (red line), and retrieved spectral phase (blue line).
    Fig. 4. Results of SHG-FROG measurement. (a), (b) Measured and reconstructed FROG traces, respectively. (c) Retrieved temporal intensity profile (measured: 6.5 fs, transform-limited case: 4.6 fs), (d) Intensity spectrum measured by a spectrometer (black line), retrieved spectrum (red line), and retrieved spectral phase (blue line).
    Beam profiles of the compressed pulse (a) before and (b) after focusing with a concave mirror ($f=300$ mm).
    Fig. 5. Beam profiles of the compressed pulse (a) before and (b) after focusing with a concave mirror ($f=300$ mm).
    Results of the spectral stability measurement. (a) Averaged spectrum of 1000 single-shot spectra. (b) Standard deviation of each spectral component.
    Fig. 6. Results of the spectral stability measurement. (a) Averaged spectrum of 1000 single-shot spectra. (b) Standard deviation of each spectral component.
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    Keisuke Kaneshima, Kengo Takeuchi, Nobuhisa Ishii, Jiro Itatani. Generation of spectrally stable 6.5-fs visible pulses via filamentation in krypton[J]. High Power Laser Science and Engineering, 2016, 4(2): 02000e17
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    Received: Jan. 21, 2016
    Accepted: May. 22, 2016
    Published Online: Nov. 1, 2016
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