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基于双偏振分束器的量子密钥分发系统
A quantum key distribution system based on two polarization beam splitters
【摘要】 提出了利用两个偏振分束器的量子密钥分发系统,有效地解决了相位调制器的偏振依赖性问题.以1310nm波长在通信距离为25km的光纤中实现了高密钥生成率,干涉对比度99.4%.有效密钥生成率大于0.6kbit/s,误码率0.5%.
【Abstract】 We present a quantum key distribution system based on two polarization beam splitters, by means of which the phase modulator’s polarization dependence is cancelled out. A high key generation rate has been obtained for the first time at 1310nm transmitted over a 25 km long fiber, with a fringe visibility of 99.4%. A sifted key rate of about 0.6 kbits/s and quantum bit error rate of about 0.5% are obtained.
【关键词】 量子密钥分发;
偏振分束器;
单光子干涉;
【Key words】 quantum key distribution; polarization beam splitter; single photon interference;
【Key words】 quantum key distribution; polarization beam splitter; single photon interference;
【基金】 国家重点基础研究发展规划(批准号:2001CB309301);中国科学院创新基金(批准号:1731230300009)资助的课题.~~
- 【文献出处】 物理学报 ,Acta Physica Sinica , 编辑部邮箱 ,2005年11期
- 【分类号】TN918.1;
- 【被引频次】9
- 【下载频次】233