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Spectrally resolved wedged reversal shearing interferometer

Billy Lam and Chunlei Guo

Abstract

In this Letter, we introduce a technique to fully determine the spatio-temporal electric field $E(x,y,t)$ of an arbitrary ultrashort pulse. By passing the beam through a wedged reversal shearing interferometer followed by a scanning Michelson interferometer, the field autocorrelation of the shearing interferograms is measured. The spectrum of the shearing interferograms is obtained after a Fourier transform by the Whittaker–Shannon sampling theorem, yielding the amplitude and wavefront information at every wavelength. With the addition of the phase information of a single point, we are able to directly reconstruct the spatio-temporal electric field $E(x,y,t)$ of an arbitrary ultrashort pulse.

© 2021 Optical Society of America

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Supplementary Material (6)

NameDescription
Supplement 1       Supplemental Document
Visualization 1       (Left) The retrieved pulse with a phase distribution of a cylindrical lens. (Right) The actual simulated pulse.
Visualization 2       (Left) The retrieved pulse with astigmatism. (Right) The actual simulated pulse.
Visualization 3       Delay scanning of the shearing interferograms of a pulse with pulse front tilt.
Visualization 4       Spectrally-resolved shearing interferograms of a pulse with pulse front tilt. Each panel of the interferograms is the Fourier Transform of that in Visualization 3.
Visualization 5       The retrieved pulse after the amplitude and wavefront retrieval using the spectrally-resolved shearing interferograms from Visualization 4 and the measured spectral phase (see Fig. S1 for underlying values) using FROG device from Swamp Optics.

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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