Applied Physics B

, Volume 74, Supplement 1, pp s225–s229

Sensitivity improvement of spectral phase interferometry for direct electric-field reconstruction for the characterization of low-intensity femtosecond pulses

Authors

  • M. Hirasawa
    • Department of Applied Physics, Hokkaido University, Kita-13, Nishi-8, Kita-ku, Sapporo, 060-8628 Japan
  • N. Nakagawa
    • Department of Applied Physics, Hokkaido University, Kita-13, Nishi-8, Kita-ku, Sapporo, 060-8628 Japan
  • K. Yamamoto
    • Department of Applied Physics, Hokkaido University, Kita-13, Nishi-8, Kita-ku, Sapporo, 060-8628 Japan
  • R. Morita
    • Department of Applied Physics, Hokkaido University, Kita-13, Nishi-8, Kita-ku, Sapporo, 060-8628 Japan
  • H. Shigekawa
    • Institute of Applied Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8573 Japan
  • M. Yamashita
    • Department of Applied Physics, Hokkaido University, Kita-13, Nishi-8, Kita-ku, Sapporo, 060-8628 Japan
Article

DOI: 10.1007/s00340-002-0891-y

Cite this article as:
Hirasawa, M., Nakagawa, N., Yamamoto, K. et al. Appl Phys B (2002) 74: s225. doi:10.1007/s00340-002-0891-y

Abstract.

A modified-SPIDER (spectral phase interferometry for direct electric-field reconstruction) technique where external powerful optical pulses are employed as a light source of chirped reference pulses for sum-frequency generation is proposed and is demonstrated experimentally. It provides great improvements in sensitivity and signal-to-noise ratio, and will enable a single-shot measurement for a weak pulse, such as 1 nJ/THz-bandwidth. The technique demonstrates high accuracy for determining the delay-time, t, for weak pulse characterization, which greatly affects the group-delay dispersion of the reconstructed spectral phase.

PACS: 39.30.+w
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© Springer-Verlag 2002