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Microwave and Optical Technology Letters

Single‐photon detectors for quantum key distribution in 1550 nm: Simulations and experimental results

Rubens Viana Ramos, George A. P. Thé

Published Mar 17, 2003• 4 citations
Publisher

Abstract

Abstract Quantum key distribution is a new technique that permits secure distribution of a bit string, used as a key in cryptographic protocols. The present quantum‐cryptographic protocols use a single photon to carry information; hence, for the construction of an optical setup able to support quantum‐cryptographic protocols, it is necessary to use single‐photon detectors. In this paper, numerical simulations and experimental results of single‐photon detectors in 1550 nm, using avalanche photodiode, are shown. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 37: 136–139, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10847

DOI
10.1002/mop.10847

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Abstract Quantum key distribution is a new technique that permits secure distribution of a bit string, used as a key in cryptographic protocols. The present quantum‐cryptographic protocols use a single photon to carry information; hence, for the construction of an optical setup able to support quantum‐cryptographic protocols, it is necessary to use single‐photon detectors. In this paper, numerical simulations and experimental results of single‐photon detectors in 1550 nm, using avalanche photodiode, are shown. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 37: 136–139, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10847
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.
Abstract In order to realize long‐distance quantum cryptography based on standard optical fiber network, we have developed a single‐photon detector at 1550 nm using InGaAs/InP avalanche photodiodes (APDs). To reduce the dark count probability, APDs were cooled and operated with a Gated Passive Quenching Circuit. A quantum efficiency of 13.7% was obtained at −55 °C while keeping the dark count probability per gate (2 ns) as low as 2.4 × 10−5. In this paper we will discuss the performance of the developed single‐photon detector in view of application to quantum cryptography. © 2003 Wiley Periodicals, Inc. Electron Comm Jpn Pt 2, 86(5): 10–15, 2003; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/ecjb.10115
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
A brief overview is given of single photon detector performance requirements for quantum cryptography applications. The analysis is made with respect to restrictions necessary to secure the quantum key distribution channel. InGaAs/InP avalanche photodiode performance is analysed for single photon counting at 1550 nm. Quantum efficiency, dark current and afterpulsing probability (for times up to 100μs after an initial avalanche) are studied in a wider temperature range than previously reported (0deg; C to –80deg;C). We show that photon counting is a bottle-neck in current quantum key distribution systems and provides the source for future performance improvement.