%0 Journal Article
%T An auto-compensating and efficient differential phase shift quantum key distribution system<br>自动补偿高效的差分相位编码QKD系统
%A Lin Yi-Man
%A Liang Rui-Sheng
%A Lu Yi-Qun
%A Lu Hong
%A Guo Bang-Hong
%A Liu Song-Hao
%A <br>林一满
%A 梁瑞生
%A 路轶群
%A 路洪
%A 郭邦红
%A 刘颂豪
%J 物理学报
%D 2007
%I 
%X We present an improved differential phase shift quantum key distribution scheme which features auto-compensation,high efficiency,and excellent practicality.Alice modulates continuous laser using an intensity modulator based on polarization to generate coherent pulse train.Bob employs a Fraday-Michelson interferometer instead of a traditional M-Z interferometer,which automatically compensates for the polarization mode dispersion caused by the changes of environment and improves the stability of the interference visibility.The present scheme not only has a simpler configuration,but also offers a higher key creation efficiency than traditional schemes.Furthermore,it enhances the security of the system.With the proposed experimental setup,a stable quantum key distribution was performed over 80km fiber with a quantum bit-error rate of less than 4%.
%K quantum cryptography
%K quantum key distribution
%K differential phase shift
%K intensity modulator based on polarization<br>量子保密通信
%K 量子密钥分发
%K 差分相位编码
%K 偏振型强度调制器
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=3DB085EA08FB15E4&yid=A732AF04DDA03BB3&vid=014B591DF029732F&iid=DF92D298D3FF1E6E&sid=A72689827E57623D&eid=2B8C5B029984A9F6&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=13