Open AccessCharacterization of vacuum and deep ultraviolet pulses via two-photon autocorrelation signals
Author(s) -
Spencer Walker,
Ran Reiff,
Agnieszka Jaroń-Becker,
Andreas Becker
Publication year - 2021
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.427200
Subject(s) - autocorrelation , optics , ultrashort pulse , physics , amplitude , pulse (music) , photon , pulse shaping , multiphoton intrapulse interference phase scan , femtosecond pulse shaping , pulse duration , bandwidth limited pulse , photon counting , materials science , laser , statistics , mathematics , detector
Characterization of ultrashort vacuum and deep ultraviolet pulses is important in view of applications of those pulses for spectroscopic and dynamical imaging of atoms, molecules, and materials. We present an extension of the autocorrelation technique, applied for measurement of the pulse duration via a single Gaussian function. Analytic solutions for two-photon ionization of atoms by Gaussian pulses are used along with an expansion of the pulse to be characterized using multiple Gaussians at multi-color central frequencies. This approach allows one to use two-photon autocorrelation signals to characterize isolated ultrashort pulses and pulse trains, i.e., the time-dependent amplitude and phase variation of the electric field. The potential of the method is demonstrated using vacuum and deep ultraviolet pulses and pulse trains obtained from numerical simulations of macroscopic high harmonic spectra.