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research article

Fourier-plane spatial frequency modulation imaging: enhanced resolution imaging with a single, ultrashort pulse

Bernard, Olivier  
•
Cottrell, Seth
•
Bartels, Randy
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December 5, 2025
Applied Optics

Single-shot spatial frequency-resolved imaging (SPIFI) is demonstrated for the first time, to our knowledge, using only a single 30 fs pulse. Earlier single-shot SPIFI configurations integrated a train of laser pulses, operated in an image plane conjugate to the object plane, and required a 2D detector. Here, a single pulse is selected, the data are collected in the Fourier plane, and the signal can be captured with 1D detection. The resultant improvement in spatial frequency support, characteristic of single-shot SPIFI, is shown to be conserved in this new architecture, to our knowledge. This advancement allows increased resolution of physical events gated by a femtosecond pulse.

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ao-64-35-10632.pdf

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openaccess

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CC BY

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