A versatile source of polarisation entangled photons for quantum network applications

Florian Kaiser (1) , Amandine Issautier (1) , Lutfi Arif Ngah (1) , Olivier Alibart (1) , Anthony Martin (1) , Sébastien Tanzilli (1)

1 LPMC - Laboratoire de physique de la matière condensée

We report a versatile and practical approach for generating high-quality polarization entanglement in a fully guided-wave fashion. Our setup relies on a high-brilliance type-0 waveguide generator producing paired photon at a telecom wavelength associated with an advanced energy-time to polarisation transcriber. The latter is capable of creating any pure polarization entangled state, and allows manipulating single photon bandwidths that can be chosen at will over five orders of magnitude, ranging from tens of MHz to several THz. We achieve excellent entanglement fidelities for particular spectral bandwidths, 25 MHz, 540 MHz and 100 GHz, proving the relevance of our approach. Our scheme stands as an ideal candidate for a wide range of network applications, ranging from dense division multiplexing quantum key distribution to heralded optical quantum memories and repeaters.

Mots clés: Integrated optics; Nonlinear optics; Quantum Optics; Entanglement; Quantum Information and Communication

Domaines: Physique Quantique [quant-ph]

Florian Kaiser, Amandine Issautier, Lutfi Arif Ngah, Olivier Alibart, Anthony Martin, et al.. A versatile source of polarisation entangled photons for quantum network applications. Laser Physics Letters, 2013, 10, pp.045202. ⟨10.1088/1612-2011/10/4/045202⟩. ⟨hal-00845658⟩