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Polarization-entangled photon-pair source obtained via type-II non-collinear SPDC process with PPKTP crystal

arXiv
Authors: Sang Min Lee, Heonoh Kim, Myoungsik Cha, Han Seb Moon

Year

2015

Paper ID

4430

Status

Preprint

Abstract Read

~2 min

Abstract Words

83

Citations

N/A

Abstract

We demonstrate a polarization-entangled photon-pair source obtained via a type-II non-collinear quasi-phase-matched spontaneous parametric down-conversion process with a 10-mm periodically poled KTiOPO4 crystal, which is as stable and wavelength-tunable as the well-known Sagnac configuration scheme. A brightness of 4.2 kHz/mW is detected and a concurrence of 0.975 is estimated using quantum state tomography. Without loss of entanglement and brightness, the photon-pair wavelengths are tunable through control of the crystal temperature. This improvement is achieved using the non-collinear configuration and a stable interferometric distinguishability compensator.

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  • We demonstrate a polarization-entangled photon-pair source obtained via a type-II non-collinear quasi-phase-matched spontaneous parametric down-conversion process with a 10-mm...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1512.07698 [2] arXiv https://arxiv.org/abs/1512.07698 [3] Publisher https://arxiv.org/abs/1512.07698

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