Abstract
We present an experimental method to measure the transverse spatial quantum state of an optical field in coordinate space at the single-photon level. The continuous-variable measurements are made with a photon-counting, parity-inverting Sagnac interferometer based on all-reflecting optics. The technique provides a large numerical aperture without distorting the shape of the wavefront, does not introduce astigmatism, and allows for characterization of fully or partially coherent optical fields at the single-photon level. Measurements of the transverse spatial Wigner functions for highly attenuated coherent beams are presented and compared with theoretical predictions.
© 2005 Optical Society of America
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Brian J. Smith, Emmy Killett, M. G. Raymer, I. A. Walmsley, and K. Banaszek, "Measurement of the transverse spatial quantum state of light at the single-photon level: publisher’s note," Opt. Lett. 46, 2151-2151 (2021)https://opg.optica.org/ol/abstract.cfm?uri=ol-46-9-2151
22 April 2021: An update was made to the author listing.
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