High rate, long-distance quantum key distribution over 250 km of ultra low loss fibres
Damien Stucki, Nino Walenta, Fabien Vannel, Rob Thew, Nicolas Gisin, Hugo Zbinden, Stuart Gray, Christopher R. Towery, Sergey Y. Ten · New Journal of Physics · 2009
We present a fully automated quantum key distribution prototype running at 625 MHz clock rate. Taking advantage of ultra low loss (ULL) fibres and low-noise superconducting detectors, we can distribute 6000 secret bits s −1 over 100 km and 15 bits s −1 over 250 km.