Abstract
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 language | English |
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Article number | 034017 |
Journal | JPhys Photonics |
Volume | 3 |
Issue number | 3 |
DOIs | |
State | Published - Jul 2021 |
Externally published | Yes |
Keywords
- Frequency-resolved optical gating
- Laser polarization state
- Phase retrieval
- Ptychography algorithm