Crossed-crystal scheme for femtosecond-pulsed entangled photon generation in periodically poled potassium titanyl phosphate

Thomas Scheidl, Felix Tiefenbacher, Robert Prevedel, Fabian Steinlechner, Rupert Ursin, and Anton Zeilinger
Phys. Rev. A 89, 042324 – Published 23 April 2014

Abstract

We demonstrate a scheme for femtosecond pulsed spontaneous parametric down-conversion in periodically poled potassium titanyl phosphate crystals. Our scheme is based on a crossed crystal configuration with collinear quasi-phase-matching. The nondegenerate photon pairs are split in a fiber-based wavelength division multiplexer. The source is easier to align than common pulsed sources based on bulk beta barium borate crystals and exhibits high-quality polarization entanglement as well as nonclassical interference capabilities. Hence, we expect this source to be a well-suited candidate for multiphoton state generation, e.g., for linear optical quantum computation and quantum communication networks.

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  • Received 9 January 2014

DOI:https://doi.org/10.1103/PhysRevA.89.042324

©2014 American Physical Society

Authors & Affiliations

Thomas Scheidl1,*, Felix Tiefenbacher1, Robert Prevedel2,†, Fabian Steinlechner3, Rupert Ursin1,4, and Anton Zeilinger1,4

  • 1Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences, Boltzmanng. 3, A-1090 Vienna, Austria
  • 2Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
  • 3ICFO–Institut de Ciencies Fotoniques, E-08860 Castelldefels (Barcelona), Spain
  • 4Vienna Center for Quantum Science and Technology, Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria

  • *thomas.scheidl@univie.ac.at
  • Present address: Research Institute of Molecular Pathology (IMP) and Max F. Perutz Laboratories GmbH, Dr.-Bohr-Gasse 7-9, A-1030 Vienna, Austria.

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Issue

Vol. 89, Iss. 4 — April 2014

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