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Proceedings Paper

Photon-sparse heralded imaging
Author(s): Peter A. Morris; Reuben S. Aspden; Jessica Bell; Daniel S. Tasca; Robert W. Boyd; Miles J. Padgett
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Paper Abstract

How many photons does it take to form an image? Although a single photon can be spatially encoded to carry large amounts of information, real images are not fully orthogonal to each other and hence, realistically, require many detected photons to distinguish between them. Even if one has access to a pixelated imaging detector with high quantum efficiency, the fidelity of a recorded, or inferred, image depends critically upon the dark counts from the detector. Here we present imaging using heralded single-photons and a time-gated intensified camera to all but eliminate noise-events, and record images of a standard test-target. The images are formed from only a few thousand photons and are therefore subject to a noise inherent within the Poissonian distribution of single-photon events. We apply techniques of compressive sensing and image regularization to obtain good estimates of the object, obtained for ultra-low optical exposures.

Paper Details

Date Published: 28 May 2014
PDF: 6 pages
Proc. SPIE 9114, Advanced Photon Counting Techniques VIII, 91140B (28 May 2014); doi: 10.1117/12.2053220
Show Author Affiliations
Peter A. Morris, Univ. of Glasgow (United Kingdom)
Reuben S. Aspden, Univ. of Glasgow (United Kingdom)
Jessica Bell, Univ. of Glasgow (United Kingdom)
Daniel S. Tasca, Federal Univ. of Rio de Janeiro (Brazil)
Robert W. Boyd, Univ. of Glasgow (United Kingdom)
Univ. of Rochester (United States)
Univ. of Ottawa (Canada)
Miles J. Padgett, Univ. of Glasgow (United Kingdom)

Published in SPIE Proceedings Vol. 9114:
Advanced Photon Counting Techniques VIII
Mark A. Itzler; Joe C. Campbell, Editor(s)

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