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Experimental quantum key distribution at a wavelength of λ~850nm

AuthorsFernández Mármol, Verónica ; Arroyo Guardeño, David ; García Martínez, María José; Hiskett, P. A.; Collins, R. J.; Buller, Gerald S.; Orúe, Amalia B.
KeywordsQuantum key distribution
quantum cryptography
optical data communications
data encryption
optical fibre
free space communications
Issue Date9-Jul-2008
SeriesX Reunión Española sobre Criptología (RECSI)
AbstractSome basic considerations for the experimental realisation of a quantum key distribution (QKD) system are discussed in this paper. Among them are the wavelength of the photon source and the composition of the transmission channel. In particular, the advantages and disadvantages of using either λ ~ 850nm or λ ~ 1300/1550nm for the source’s wavelength are analysed along with a comparison of the performance of optical fibre versus free space as the physical medium for the transmission channel.
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