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Ultra-fast photon pair sources for advanced quantum communication

Lutfi Arif Ngah, Virginia D’Auria, Laurent Labonté, Olivier Alibart, Sébastien Tanzilli

Published Mar 18, 2014• 0 citations
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Abstract

We report a realization of ultra-fast photon pair sources, specif- ically designed for efficient, long-distance, quantum relay operation. As a viable solution, our sources are capable to deliver high quality single photon pairs at high repetition rate, guaranteeing efficient operational condition for intended protocol.

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Quantum information protocols tend to involve more and more entangled photon pairs, for enabling advanced quantum tasks. To compensate for the low success efficiency of these protocols, one can increase the repetition rate of the emitted pairs, up to current telecom standard (40 GHz). In this context, we propose a realization of ultra-fast photon pair sources, intended for either heralded quantum state engineering or entanglement swapping at telecom wave- length. In this paper, we present preliminary results consisting of a two-photon interference experiment using four photons where the achieved raw visibility of the Hong-Ou-Mandel (HOM) dip exceeds 98.6 %. The interfering photons are generated through spontaneous parametric down conversion process (SPDC) in two independent, separate, periodically poled lithium niobate (PPLN) waveguides.