Experimental demonstration of Klyshko’s advanced-wave picture using a coincidence-count based, camera-enabled imaging system

Aspden, R. S., Tasca, D. S., Forbes, A., Boyd, R. W. and Padgett, M. J. (2014) Experimental demonstration of Klyshko’s advanced-wave picture using a coincidence-count based, camera-enabled imaging system. Journal of Modern Optics, 61(7), pp. 547-551. (doi:10.1080/09500340.2014.899645)

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Abstract

The Klyshko advanced-wave picture is a well-known tool useful in the conceptualisation of parametric down-conversion (SPDC) experiments. Despite being well-known and understood, there have been few experimental demonstrations illustrating its validity. Here, we present an experimental demonstration of this picture using a time-gated camera in an image-based coincidence measurement. We show an excellent agreement between the spatial distributions as predicted by the Klyshko picture and those obtained using the SPDC photon pairs. An interesting speckle feature is present in the Klyshko predictive images due to the spatial coherence of the back-propagated beam in the multi-mode fibre. This effect can be removed by mechanically twisting the fibre, thus degrading the spatial coherence of the beam and time-averaging the speckle pattern, giving an accurate correspondence between the predictive and SPDC images.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Padgett, Professor Miles and Aspden, Mr Reuben and Boyd, Professor Robert and Tasca, Dr Daniel
Authors: Aspden, R. S., Tasca, D. S., Forbes, A., Boyd, R. W., and Padgett, M. J.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Journal of Modern Optics
Publisher:Taylor and Francis
ISSN:0950-0340
ISSN (Online):1362-3044

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