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Mazeas, F; Traetta, M; Bentivegna, M; Kaiser, F; Aktas, D; Zhang, W; Ramos, C A; Ngah, L A; Lunghi, T; Picholle, É; Belabas-Plougonven, N; Le Roux, X; Cassan, É; Marris-Morini, D; Vivien, L; Sauder, G; Labonté, L; Tanzilli, S
Optics express, 2016-Dec-12, 20161212, Volume: 24, Issue: 25Journal Article
We report an efficient energy-time entangled photon-pair source based on four-wave mixing in a CMOS-compatible silicon photonics ring resonator. Thanks to suitable optimization, the source shows a large spectral brightness of 400 pairs of entangled photons /s/MHz for 500 μW pump power, compatible with standard telecom dense wavelength division multiplexers. We demonstrate high-purity energy-time entanglement, i.e., free of photonic noise, with near perfect raw visibilities (> 98%) between various channel pairs in the telecom C-band. Such a compact source stands as a path towards more complex quantum photonic circuits dedicated to quantum communication systems.
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