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Journal of Communication and Information Systems

Detecção de Fotóns Isolados em 1550 nm: Simulação e Resultados Experimentais

George Thé, Rubens Viana Ramos

Published Dec 30, 2003• 0 citations
Publisher

Abstract

Quantum key distribution is a new technique that permits secure distribution of a bit string, used as key in cryptographic protocols. The security is guaranteed by suitable coding of the information in a quantum property and from the fact that a quantum cannot be both split and cloned. The present quantum-cryptographic protocols use a quantum (photon in optical systems) to carry the information. Hence, for the construction of an optical set up able to run quantum-cryptographic protocols, it is necessary use single-photon detectors. In this paper, numerical simulations and experimental results of single-photon detectors, in 1550 nm, using avalanche photodiode are shown.

DOI
10.14209/jcis.2003.19

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Quantum key distribution is a new technique that permits secure distribution of a bit string, used as key in cryptographic protocols. The security is guaranteed by suitable coding of the information in a quantum property and from the fact that a quantum cannot be both split and cloned. The present quantum-cryptographic protocols use a quantum (photon in optical systems) to carry the information. Hence, for the construction of an optical set up able to run quantum-cryptographic protocols, it is necessary use single-photon detectors. In this paper, numerical simulations and experimental results of single-photon detectors, in 1550 nm, using avalanche photodiode are shown.
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Abstract Quantum key distribution is a technique that permits the secure distribution of a bit string that is used as key in cryptographic protocols. The security is guaranteed by suitable coding of the information in a quantum property and from the fact that a quantum cannot be both split and cloned. In this article, we give details and show the results of an experimental realization of the B92 quantum key distribution protocol in 1550‐nm telecom window. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 236–241, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23025