Polarization entangled photon-pair source based on a type-II PPLN waveguide emitting at a telecom wavelength

Anthony Martin (1) , Amandine Issautier (1) , Harrald Herrmann (2) , Wolfgang Sohler (2) , Daniel Barry Ostrowsky (1) , Olivier Alibart (1) , Sébastien Tanzilli (1)

1 LPMC - Laboratoire de physique de la matière condensée
2 Angewandte Physik

We report the realization of a fiber coupled polarization entangled photon-pair source at 1310 nm based on a birefringent titanium in-diffused waveguide integrated on periodically poled lithium niobate. By taking advantage of a dedicated and high-performance setup, we characterized the quantum properties of the pairs by measuring two-photon interference in both Hong-Ou-Mandel and standard Bell inequality configurations. We obtained, for the two sets of measurements, interference net visibilities reaching nearly 100%, which represent important and competitive results compared to similar waveguide-based configurations already reported. These results prove the relevance of our approach as an enabling technology for long-distance quantum communication.

Mots clés: Quantum communication; Polariation entanglement

Domaines: Physique Quantique [quant-ph]

Anthony Martin, Amandine Issautier, Harrald Herrmann, Wolfgang Sohler, Daniel Barry Ostrowsky, et al.. Polarization entangled photon-pair source based on a type-II PPLN waveguide emitting at a telecom wavelength. New Journal of Physics, 2010, 12 (Issue 10 (October 2010)), pp.103005. ⟨10.1088/1367-2630/12/10/103005⟩. ⟨hal-00511969⟩