Analysis of detector performance in a gigahertz clock rate quantum key distribution system

作者：Clarke Patrick J; Collins Robert J; Hiskett Philip A; Garcia Martinez Maria Jose; Krichel Nils J; McCarthy Aongus; Tanner Michael G; O'Connor John A; Natarajan Chandra M; Miki Shigehito; Sasaki Masahide; Wang Zhen; Fujiwara Mikio; Rech Ivan; Ghioni Massimo; Gulinatti Angelo; Hadfield Robert H; Townsend Paul D; Buller Gerald S^*

来源：New Journal of Physics, 2011, 13: 075008.

DOI：10.1088/1367-2630/13/7/075008

We present a detailed analysis of a gigahertz clock rate environmentally robust phase-encoded quantum key distribution (QKD) system utilizing several different single-photon detectors, including the first implementation of an experimental resonant cavity thin-junction silicon single-photon avalanche diode. The system operates at a wavelength of 850 nm using standard telecommunications optical fibre. A general-purpose theoretical model for the performance of QKD systems is presented with reference to these experimental results before predictions are made about realistic detector developments in this system. We discuss, with reference to the theoretical model, how detector operating parameters can be further optimized to maximize key exchange rates.

• 出版日期2011-7-22