Single-frame transmission and phase imaging using off-axis holography with undetected photons
arxiv(2024)
摘要
Imaging with undetected photons relies upon nonlinear interferometry to
extract the spatial image from an infrared probe beam and reveal it in the
interference pattern of an easier-to-detect visible beam. Typically, the
transmission and phase images are extracted using phase-shifting techniques and
combining interferograms from multiple frames. Here we show that off-axis
digital holography enables reconstruction of both transmission and phase images
at the infrared wavelength from a single interferogram, and hence a single
frame, recorded in the visible. This eliminates the need for phase stepping and
multiple acquisitions, thereby greatly reducing total measurement time for
imaging with long acquisition times at low flux or enabling video-rate imaging
at higher flux. With this single-frame acquisition technique, we are able to
reconstruct transmission images of an object in the infrared beam with a
signal-to-noise ratio of 1.78 ± 0.06 at 10 frames per second, and record
a dynamic scene in the infrared beam at 33 frames per second.
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