V-FROG—single-scan vectorial FROG. (24th June 2021)

• Record Type: Journal Article
• Authors: Ilan Haham, Gil; Levin, Alexander; Sidorenko, Pavel; Lerner, Gavriel; Cohen, Oren
• Is Part Of: JPhys photonics. Volume 3:Number 3(2021)
• Publication Date: 2021-06-24
• Subjects: phase retrieval -- frequency-resolved optical gating -- ptychography algorithm -- laser polarization state; Photonics -- Periodicals; 621.365
• DOI: 10.1088/2515-7647/ac0541
• Languages: English
• ISSNs: 2515-7647

Abstract

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.