2013/07/20 by I. Herbauts, B. Blauensteiner, A. Poppe +2 · 85 citations
Computer Science · Engineering · Physics and Astronomy · #Multiplexing #Optical Network Technologies #Optical communication #Parametric statistics #Photon #Quantum Information and Cryptography #Quantum channel #Quantum entanglement #Quantum information science #Quantum network #Quantum optics and atomic interactions #Spontaneous parametric down-conversion #Wavelength-division multiplexing #quant-ph
paper · pdf · open access · doi:10.1364/oe.21.029013
published in Optics Express 21(23), 29013 (Optica Publishing Group) · 4 figures
arxiv created 2013/07/20 · openalex publication_date 2013/11/15 · openalex created_date 2016/06/24 · arxiv updated 2017/07/26 · openalex updated_date 2026/08/05
We implement an entanglement distribution network based on wavelength-multiplexing and optical switching for quantum communication applications. Using a high-brightness source based on spontaneous parametric down-conversion in periodically-poled lithium niobate waveguides, we generate polarisation entangled photon pairs with a broad spectrum covering the telecom wavelengths around 1550 nm. The photon pairs have entanglement fidelities up to 99%, and are distributed via passive wavelength multiplexing in a static multi-user network. We furthermore demonstrate a possible network application in a scenario with a single centralised source dynamically allocating two-party entanglement to any pair of users by means of optical switches. The whole system, from the pump laser up to the receivers, is fibre and waveguide based, resulting in maximal stability, minimal losses and the advantage of readily integrable telecom components in the 1550 nm range.