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

  • M. Hirasawa
  • N. Nakagawa
  • K. Yamamoto
  • R. Morita
  • H. Shigekawa
  • M. Yamashita
Article

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 

Copyright information

© Springer-Verlag 2002

Authors and Affiliations

  • M. Hirasawa
    • 1
  • N. Nakagawa
    • 1
  • K. Yamamoto
    • 1
  • R. Morita
    • 1
  • H. Shigekawa
    • 2
  • M. Yamashita
    • 1
  1. 1.Department of Applied Physics, Hokkaido University, Kita-13, Nishi-8, Kita-ku, Sapporo, 060-8628 JapanJP
  2. 2.Institute of Applied Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8573 JapanJP
  3. 3.CREST, Japan Science and Technology Corporation (JST), JapanJP

Personalised recommendations