QUANTUM KEY DISTRIBUTION OVER 1.1km IN AN 850nm EXPERIMENTAL ALL-FIBER SYSTEM
Liang Chuang, Fu Donghao, Bing Liang, Jing Liao, Ling-An Wu, YAO DE-CHENG, Shuwang Lü, (1)中国科学院物理研究所光物理开放实验室,北京100080; (2)中国科学院研究生院,北京100039 · Acta Physica Sinica · 2001
A 1.1km long all-fiber quantum key distribution experimental setup has been realized for the first time at 850nm. The system employs the BB84 protocol to establish a secret key between two parties, the security of which is guaranteed by Heisenberg's uncertainty relationship and the quantum noncloning principle. Phase modulated single photons are used to carry the key. The effective transmission rate is 3 bit/s, with a bit error rate of 9%.