PPLN Waveguide for Quantum Communication - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue The European Physical Journal D : Atomic, molecular, optical and plasma physics Année : 2002

PPLN Waveguide for Quantum Communication

Résumé

We report on energy-time and time-bin entangled photon-pair sources based on a periodically poled lithium niobate (PPLN) waveguide. Degenerate twin photons at 1314 nm wavelength are created by spontaneous parametric down-conversion and coupled into standard telecom fibers. Our PPLN waveguide features a very high conversion efficiency of about 10^(-6), roughly 4 orders of magnitude more than that obtained employing bulk crystals. Even if using low power laser diodes, this engenders a significant probability for creating two pairs at a time - an important advantage for some quantum communication protocols. We point out a simple means to characterize the pair creation probability in case of a pulsed pump. To investigate the quality of the entangled states, we perform photon-pair interference experiments, leading to visibilities of 97% for the case of energy-time entanglement and of 84% for the case of time-bin entanglement. Although the last figure must still be improved, these tests demonstrate the high potential of PPLN waveguide based sources to become a key element for future quantum communication schemes

Dates et versions

hal-00110805 , version 1 (01-11-2006)

Identifiants

Citer

S. Tanzilli, H. de Riedmatten, W. Tittel, H. Zbinden, P. Baldi, et al.. PPLN Waveguide for Quantum Communication. The European Physical Journal D : Atomic, molecular, optical and plasma physics, 2002, pp.155. ⟨hal-00110805⟩
71 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More