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Conference on Lasers and Electro-Optics

Quantum Enhanced LIDAR using Nonlocal Dispersion

Phillip S. Blakey, Han Liu, Georgios Papangelakis, Meng Lon Iu, Y. Zhang, Zacharie M. Léger, Amr Saher Helmy

Published Jan 1, 2022• 2 citations
Publisher

Abstract

By utilizing quantum temporal correlations in spontaneous parametric down conversion photon pairs, in conjunction with non-local dispersion, we can achieve 35.94 ± 0.91dB improvement in SNR over classical LIDAR.
DOI
10.1364/cleo_si.2022.stu5o.4

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We derive an inequality bounding the strength of temporal correlations for a pair of light beams prepared in a separable state and propagating through dispersive media with opposite signs of group-velocity dispersion. The presented inequality can be violated by entangled states of light, such as photon pairs produced in spontaneous parametric down-conversion. Because the class of separable states covers the entire category of classical fields as a particular case, this result provides an unambiguously quantum feature of nonlocal dispersion cancellation that cannot be reproduced within the classical theory of electromagnetic radiation.