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Photon-pair source at 2090 nm for long-distance quantum communication

Shashi Prabhakar, Taylor Shields, Adetunmise C. Dada, Mehdi Haji Ebrahim, Gregor G. Taylor, D. Morozov, Kleanthis Eritokritou, Shigehito Miki, Mashahiro Yabuno, Hirotaka Terai, Corin B. E. Gawith, Michael Kues, Lucia Caspani, Robert H. Hadfield, Matteo Clerici

Published Jan 18, 2020• 0 citations
OpenAlex

Abstract

We report the generation of entangled photon pairs at 2090 nm, as a basis for free-space quantum communication in an atmospheric window with low solar background. The source is based on spontaneous parametric down-conversion in periodically poled lithium niobate crystal delivering high coincidence-to-accidental ratio. We demonstrate the two-photon Hong-Ou-Mandel quantum interference and polarization entanglement.

Related papers

Generation and Detection of Down-converted Photon Pairs at $2.080\ \boldsymbol{\mu} \mathbf{m}$

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Conference on Lasers and Electro-Optics•May 1, 2019•0 citations

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Electronics Letters•Nov 22, 2007•10 citations

Indistinguishable ultra-fast photon-pair source for advanced quantum protocols

Lutfi Arif Ngah, Virginia D’Auria, Olivier Alibart +2 more

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.

•Jul 8, 2013•0 citations
We report the generation of entangled photon pairs at 2090 nm, as a basis for free-space quantum communication in an atmospheric window with low solar background. The source is based on spontaneous parametric down-conversion in periodically poled lithium niobate crystal delivering high coincidence-to-accidental ratio. We demonstrate the two-photon Hong-Ou-Mandel quantum interference and polarization entanglement.
Generation and Detection of Down-converted Photon Pairs at 2.080 μm2.080\ \boldsymbol{\mu} \mathbf{m}2.080 μm
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 into periodically poled lithium niobate. By making use 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. For the two sets of measurements we obtained interference net visibilities reaching nearly 100%, which represent important and competitive results compared to those for the similar waveguide-based configurations already reported. These results prove the relevance of our approach as an enabling technology for long-distance quantum communication.
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.