V-FROG—single-scan vectorial FROG

Gil Ilan Haham*, Alexander Levin, Pavel Sidorenko, Gavriel Lerner, Oren Cohen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


We propose and experimentally demonstrate single-scan vectorial frequency-resolved optical gating (FROG) which characterizes the amplitude, phase and polarization of ultrashort laser pulses using a single measured spectrogram. It is carried out by rotating the polarization of the incoming pulse (using a half-wavelength waveplate), in parallel to scanning the delay between the pulse and its replica in an otherwise ordinary FROG apparatus. A ptychography-based phase retrieval algorithm extracts the full pulse information from the recorded spectrogram. We numerically show that this method is reliable and use it to experimentally reconstruct a pulse with intricate time-dependent polarization. We also show that this method can be used to remove time-reversal ambiguity of second harmonic generation FROG.

Original languageEnglish
Article number034017
JournalJPhys Photonics
Issue number3
StatePublished - Jul 2021
Externally publishedYes


  • Frequency-resolved optical gating
  • Laser polarization state
  • Phase retrieval
  • Ptychography algorithm


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