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Proceedings Paper

Single photon detection for high bit rate quantum communication
Author(s): J. F. Dynes; Z. L. Yuan; A. W. Sharpe; A. R. Dixon; A. J. Shields
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Paper Abstract

Quantum communication, in particular, quantum key distribution (QKD) is moving ever closer to real world implementation. However, for successful QKD system deployment, the QKD system components must be robustly designed and feature highly reliable operation. In this paper we focus on one important aspect of any quantum communication system: the single photon detector. In particular our interest is centered upon the InGaAs avalanche photodiode (APD) single photon detector operating in a self-differencing (SD) mode. Such a detector features high clock frequencies of up to 3GHz, high photon count rates as well as detection efficiencies approaching 20% with low afterpulsing. We show successful operation of a high bit rate QKD system using this SD-APD technology in a real world fiber network.

Paper Details

Date Published: 13 October 2011
PDF: 7 pages
Proc. SPIE 8189, Optics and Photonics for Counterterrorism and Crime Fighting VII; Optical Materials in Defence Systems Technology VIII; and Quantum-Physics-based Information Security, 818918 (13 October 2011); doi: 10.1117/12.898954
Show Author Affiliations
J. F. Dynes, Toshiba Research Europe Ltd. (United Kingdom)
Z. L. Yuan, Toshiba Research Europe Ltd. (United Kingdom)
A. W. Sharpe, Toshiba Research Europe Ltd. (United Kingdom)
A. R. Dixon, Toshiba Research Europe Ltd. (United Kingdom)
A. J. Shields, Toshiba Research Europe Ltd. (United Kingdom)


Published in SPIE Proceedings Vol. 8189:
Optics and Photonics for Counterterrorism and Crime Fighting VII; Optical Materials in Defence Systems Technology VIII; and Quantum-Physics-based Information Security
Roberto Zamboni; Mark T. Gruneisen; Colin Lewis; Miloslav Dusek; Douglas Burgess; François Kajzar; Attila A. Szep; John G. Rarity, Editor(s)

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