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Evans PG, Bennink RS, Grice WP, et al. Bright source of spectrally uncorrelated polarization-entangled photons with nearly single-mode emission. Phys Rev Lett. 2010;105(25):253601doi: 10.1103/PhysRevLett.105.253601.
Evans, P. G., Bennink, R. S., Grice, W. P., Humble, T. S., & Schaake, J. (2010). Bright source of spectrally uncorrelated polarization-entangled photons with nearly single-mode emission. Physical review letters, 105(25), 253601. https://doi.org/10.1103/PhysRevLett.105.253601
Evans, P G, et al. "Bright source of spectrally uncorrelated polarization-entangled photons with nearly single-mode emission." Physical review letters vol. 105,25 (2010): 253601. doi: https://doi.org/10.1103/PhysRevLett.105.253601
Evans PG, Bennink RS, Grice WP, Humble TS, Schaake J. Bright source of spectrally uncorrelated polarization-entangled photons with nearly single-mode emission. Phys Rev Lett. 2010 Dec 17;105(25):253601. doi: 10.1103/PhysRevLett.105.253601. Epub 2010 Dec 13. PMID: 21231588.
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Phys Rev Lett. 2010 Dec 17;105(25):253601. doi: 10.1103/PhysRevLett.105.253601. Epub 2010 Dec 13.

Bright source of spectrally uncorrelated polarization-entangled photons with nearly single-mode emission.

Physical review letters

P G Evans, R S Bennink, W P Grice, T S Humble, J Schaake

Affiliations

  1. Center for Quantum Information Science, Computing and Computational Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA. [email protected]

PMID: 21231588 DOI: 10.1103/PhysRevLett.105.253601

Abstract

We present results of a bright polarization-entangled photon source operating at 1552 nm via type-II collinear degenerate spontaneous parametric down-conversion in a periodically poled potassium titanyl phosphate crystal. We report a conservative inferred pair generation rate of 123,000 pairs/s/mW into collection modes. Minimization of spectral and spatial entanglement was achieved by group velocity matching the pump, signal, and idler modes and through properly focusing the pump beam. By utilizing a pair of calcite beam displacers, we are able to overlap photons from adjacent down-conversion processes to obtain polarization-entanglement visibility of 94.7+/-1.1% with accidentals subtracted.

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