Starch-based second-harmonic-generated collinear frequency-resolved optical gating pulse characterization at the focal plane of a high-numerical-aperture lens

  • Amat-Roldan I
  • Cormack I
  • Loza-Alvarez P
 et al. 
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Abstract

We report the use of starch as an ideal nonlinear medium with which to perform collinear frequency-resolved optical gating measurements of ultrashort pulses at the focal plane of a high-numerical-aperture (NA) lens. We achieved these measurements by simply sandwiching starch granules (suspended in water) between two coverslips and placing them within the focal plane of a high-NA lens. The natural nonlinear characteristics of starch allow the correct phase matching of pulses at the focal plane of a high-NA lens at different wavelengths. This elegant arrangement overcomes all the complexity and problems that were previously associated with pulse characterization within a multiphoton microscope. (C) 2004 Optical Society of America.

Author-supplied keywords

  • femtosecond pulses
  • microscopy
  • ultrashort pulses

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Authors

  • I Amat-Roldan

  • I G Cormack

  • P Loza-Alvarez

  • D Artigas

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