A simple plug&play quantum key distribution scheme with extremely long-term stability
Haiqiang Ma, Zhao Jian-Ling, Ling-An Wu · 2007
A relatively simple plug-and-play quantum key distribution scheme based on two polarization beamsplitters has been demonstrated with an extinction ratio of 30 dB over 50 km of fiber at 1.31 mum, maintainable under ordinary lab conditions for several months.