Pulse Characterization via Two-Photon Auto- and Cross-Correlation Signals
ORAL
Abstract
Characterization of ultrashort vacuum and deep ultraviolet laser pulses is crucial for spectroscopy and dynamic imaging of atoms, molecules, and materials.
We present a self-consistent method, extended from the technique proposed in [1], for fully characterizing ultrashort pulses and pulse trains via photoionization spectra.
In this method, analytic solutions for two-photon ionization of atoms by Gaussian pulses are used to characterize the pulse as a superposition of multiple Gaussians at multi-color central frequencies. This approach allows one to use auto- and cross-correlation signals to characterize the time-dependent amplitude, phase, and chirp variation of the electric field from the pulse. This method is demonstrated with vacuum and deep ultraviolet pulses and pulse trains obtained from numerical simulations of macroscopic high harmonic spectra [2].
[1] S. Walker, R. Reiff, A. Jaron-Becker, and A. Becker. Characterization of vacuum and deep ultraviolet pulses via
two-photon autocorrelation signals. Opt. Lett., 46(13):3083–3086, Jul 2021.
[2] R. Reiff, J. Venzke, A. Jaron-Becker, and A. Becker. Interference effects in harmonic generation induced by focal
phase distribution. OSA Continuum, 4(7):1897–1906, Jul 2021.
We present a self-consistent method, extended from the technique proposed in [1], for fully characterizing ultrashort pulses and pulse trains via photoionization spectra.
In this method, analytic solutions for two-photon ionization of atoms by Gaussian pulses are used to characterize the pulse as a superposition of multiple Gaussians at multi-color central frequencies. This approach allows one to use auto- and cross-correlation signals to characterize the time-dependent amplitude, phase, and chirp variation of the electric field from the pulse. This method is demonstrated with vacuum and deep ultraviolet pulses and pulse trains obtained from numerical simulations of macroscopic high harmonic spectra [2].
[1] S. Walker, R. Reiff, A. Jaron-Becker, and A. Becker. Characterization of vacuum and deep ultraviolet pulses via
two-photon autocorrelation signals. Opt. Lett., 46(13):3083–3086, Jul 2021.
[2] R. Reiff, J. Venzke, A. Jaron-Becker, and A. Becker. Interference effects in harmonic generation induced by focal
phase distribution. OSA Continuum, 4(7):1897–1906, Jul 2021.
*This work was supported by the National Science Foundation (Award Number: PHY-2207995).
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Presenters
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Keegan M Finger
- JILA & Department of Physics University of Colorado, Boulder