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

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

doi:10.1103/PhysRevLett.105.253601

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

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

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104 Scopus citations

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 123000pairs/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.

Original language	English
Article number	253601
Journal	Physical Review Letters
Volume	105
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.105.253601
State	Published - Dec 13 2010

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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 123000pairs/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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AU - Humble, T. S.

AU - Schaake, J.

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AB - 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 123000pairs/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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Bright source of spectrally uncorrelated polarization-entangled photons with nearly single-mode emission

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