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Proceedings Paper

Generation of spatially pure photon pairs in a multimode nonlinear waveguide using intermodal dispersion
Author(s): Michal Karpinski; Czeslaw Radzewicz; Konrad Banaszek
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Paper Abstract

We present experimental realization of type-II spontaneous parametric down-conversion in a periodically poled potassium titanyl phosphate (KTiOPO4) nonlinear waveguide. We demonstrate that by careful exploitation of intermodal dispersion in the waveguide it is feasible to produce photon pairs in well defined transverse modes without any additional spatial filtering at the output. Spatial characteristics is verified by measurements of the M2 beam quality factors. We also prepared a postselected polarization-entangled two-photon state shown to violate Bell’s inequality. Similar techniques based on intermodal dispersion can be used to generate spatial entanglement and hyperentanglement.

Paper Details

Date Published: 15 October 2012
PDF: 11 pages
Proc. SPIE 8518, Quantum Communications and Quantum Imaging X, 85180J (15 October 2012);
Show Author Affiliations
Michal Karpinski, Univ. of Warsaw (Poland)
Czeslaw Radzewicz, Univ. of Warsaw (Poland)
Konrad Banaszek, Univ. of Warsaw (Poland)

Published in SPIE Proceedings Vol. 8518:
Quantum Communications and Quantum Imaging X
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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