物理学报2011，Vol.60Issue(9)：411-417,7.
基于法拉第-麦克尔逊干涉检测的低误码差分相位编码实验系统
A new differential phase shift quantum key distribution system with Faraday-Michelson interferometer
摘要
Abstract
A new differential phase shift quantum key distribution system based on the intensity modulator with Faraday-Michelson interferometer is demonstrated experimentally. Some technologies are employed to improve the performance of the quantum key distribution system. These technologies include the clock generation technology of arbitrary frequency by a small scale frequency-split and phase locked loop scheme, the new method to acquire the half-wave voltage of the phase modulator with a high accuracy in the condition of the single photon count, and the auto-compensated polarization technology by the Faraday-Michelson interferometer. Finally, the quantum key distribution is achieved with a quantum bit error rate of 3.9% when the transmission distance reaches 50 km.关键词
量子保密通信/量子密钥分发/差分相位编码/法拉第-麦克尔逊干涉仪Key words
quantum cryptography/quantum key distribution/differential phase shift/Faraday-Michelson interferometer分类
信息技术与安全科学引用本文复制引用
魏正军,万伟,王金东,廖常俊,刘颂豪..基于法拉第-麦克尔逊干涉检测的低误码差分相位编码实验系统[J].物理学报,2011,60(9):411-417,7.基金项目
广州市科技支撑计划 （）
广东省工业攻关项目 （）
中国科学院量子信息技术重点实验室开放课题资助的课题 （）
