On the passive probing of fiber optic quantum communication channels

Journal Article · Thu Apr 15 00:00:00 EDT 2010 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776110040023· OSTI ID:21443564

Katamadze, K G; Kulik, S P ^[1]; Molotkov, S N ^[2]

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1. Moscow State University, Faculty of Physics (Russian Federation)
2. Academy of Cryptography of the Russian Federation (Russian Federation)

Avalanche photodetectors based on InGaAs:P are the most sensitive and only detectors operating in the telecommunication wavelength range 1.30-1.55 {mu}m in the fiber optic quantum cryptography systems that can operate in the single photon count mode. In contrast to the widely used silicon photodetectors for wavelengths up to 1 {mu}m operating in a waiting mode, these detectors always operate in a gated mode. The production of an electron-hole pair in the process of the absorption of a photon and the subsequent appearance of an avalanche of carriers can be accompanied by the inverse processes of the recombination and emission of photons. Such a backward emission can present a potential serious problem for the stability of fiber optic quantum cryptography systems against passive probing. The results of analyzing the detection of backscattered radiation are reported. The probability of such an emission has been estimated.

• OSTI ID: 21443564
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 110, Issue 4; Other Information: DOI: 10.1134/S1063776110040023; Copyright (c) 2010 Pleiades Publishing, Ltd.; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
DATA TRANSMISSION
DETECTION
FIBERS
GALLIUM ARSENIDES
HOLES
INDIUM ARSENIDES
PHOTODETECTORS
PHOTON EMISSION
PHOTONS
PROBABILITY
QUANTUM CRYPTOGRAPHY
RECOMBINATION
SILICON
ARSENIC COMPOUNDS
ARSENIDES
BOSONS
COMMUNICATIONS
CRYPTOGRAPHY
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
GALLIUM COMPOUNDS
INDIUM COMPOUNDS
MASSLESS PARTICLES
PNICTIDES
SEMIMETALS
SORPTION