PPLN waveguide for quantum communication
By S. Tanzilli, Wolfgang Tittel, Hugues de Riedmatten, H. Zbinden, P. Baldi, M. Demicheli, D. Ostrowsky, Nicolas Gisin. 2001
231 citations recorded by the source corpus.
Abstract: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 1 314 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 [#!Tanzilli01a!#]. 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.
Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/63910d528fe9ded8fee15ee96ead1d0190662f86
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In Atomic and Molecular Physics, and Optics
- Nicolas Gisin
- Valerio Scarani
- C. Simon
- H. Zbinden
- Fabio Sciarrino
- M. G. Thompson
- Anthony Laing
- Hoi-Kwong Lo
In Electrical and Electronic Engineering
Citations in the corpus
- Integrated photonic quantum technologies (2019, methodology): “A range of optical waveguide systems have been developed for IQP, including laser-writing silica [19–22], silica-on-insulator (SiO2) [14, 16–18], silicon-on-insulator (Si) [23–26], silicon nitride (Si3N4) [27–30], lithium niobate (LN) [31–33], gallium arsenide (GaAs) [34– 36], indium phosphide (InP)”
- Entangling independent photons by time measurement (2007, background): “The induced losses are compensated for by the high down-conversion efficiency of periodically poled lithium niobate (PPLN) waveguide crystal”
- Advances in lithium niobate photonics: development status and perspectives (2022, methodology): “An alternative method is called quasiphase matching (QPM) and can be realized by periodically inverting (poling) LN ferroelectric domains to point alternatively to the +c and −c directions to form PPLN.(80) Compared with bulk LN, an advantage of TFLN structures is their flexibility in dispersion eng”