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

Sang Min Lee; Heonoh Kim; Myoungsik Cha; Han Seb Moon

doi:10.1364/OE.24.002941

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

Quantum Physics 2016-04-20 v2

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

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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 KTiOPO $_4$ 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.

Keywords

polarization entanglement photon-pair source spontaneous parametric down-conversion PPKTP crystal quasi-phase matching quantum state tomography

Cite

@article{arxiv.1512.07698,
  title  = {Polarization-entangled photon-pair source obtained via type-II non-collinear SPDC process with PPKTP crystal},
  author = {Sang Min Lee and Heonoh Kim and Myoungsik Cha and Han Seb Moon},
  journal= {arXiv preprint arXiv:1512.07698},
  year   = {2016}
}

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

Abstract

Keywords

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