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Feasibility study of free-space quantum key distribution in the mid-infrared

Aellen, Thierry
Faist, Jerome
Published in Quantum Information and Computation. 2008, vol. 8, no. 1&2, p. 0001-0011
Abstract We report on a feasibility study of a free-space Quantum Key Distribution setup operating at a mid-infrared wavelength. Alice sends polarization-coded pseudo-single photons from a Quantum Cascade Laser at 4.6 μm to Bob, who uses a nonlinear crystal and a Silicon Avalanche Photodiode to perform the detection via Sum Frequency Generation. Theoretical predictions, based on a proof-of-principle experiment, show that, under certain foggy atmospheric conditions, the proposed system is barely affected, whereas other systems operating at standard near-infrared wavelengths would simply not work at all.
Keywords Quantum Key DistributionMid-InfraredFree-Space OpticsFrequency Up-Conversion
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TEMPORAO, Guilherme et al. Feasibility study of free-space quantum key distribution in the mid-infrared. In: Quantum Information and Computation, 2008, vol. 8, n° 1&2, p. 0001-0011. https://archive-ouverte.unige.ch/unige:36694

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Deposited on : 2014-05-19

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