Single-shot pulse duration measurement

Technical Discussions
1

What commercial products would you recommend for measuring pulses down to 20 fs in single-shot? Any alternatives that could also work in the 400-530nm region?

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2

Hi Daniel

Both FROG (Freququency resolved optical gating) and SPIDER (Spectral Phase Interferometry for Direct Electric-field Reconstruction) systems are capable of single-shot meaurements.

This FROG System from APE enables pulse width from 20fs to 6 ps and you can select the SHG crystal to suit the 400-530 nm wavelength range. Some considerations include:

  • Highly variable for different parameter ranges (pulse duration, wavelength)
  • Measure spectrally broadband pulses in single shot mode often not possible

Alternatively a Few Cycle Spider system is capable of precise characterization of very short pulses down to sub-5 fs in a single shot-measurement of pulse phase and intensity. Some considerations are:

  • Relatively complex setup
  • Insensitive to intensity noise
  • Unambiguous in the sign of the chirp and time
  • Different parameter ranges often require an optimized single-setup

Hope it helps!

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