| 1.55 μm升频单光子探测量子密钥分配系统的性能研究 |
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| 引用本文： | 焦荣珍,冯晨旭,马海强. 1.55 μm升频单光子探测量子密钥分配系统的性能研究[J]. 物理学报, 2008, 57(3): 1352-1355 |
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| 作者姓名： | 焦荣珍 冯晨旭 马海强 |
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| 作者单位： | 北京邮电大学理学院，北京 100876 |
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| 基金项目： | 国家自然科学基金(批准号:.60544002)资助的课题. |
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| 摘 要： | 分析了1.55 μm升频单光子探测量子密钥分配(QKD)系统的性能，讨论了升频单光子探测器的主要参数：量子效率和暗计数与抽运功率的关系.比较了BB84协议、BBM92协议和DPSK协议的光纤QKD系统的性能：安全通信速率与距离的关系，通过比较得出升频探测器优于传统的InGaAs/InP雪崩二极管单光子探测器，用升频探测器后的通信距离能比传统的大两倍以上，能很好改善量子通信系统的性能. 关键词：量子效率通信速率暗计数
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| 关 键 词： | 量子效率 通信速率 暗计数 |
| 文章编号： | 1000-3290(2008)03-1352-04 |
| 收稿时间： | 2007-05-31 |
| 修稿时间： | 2007-07-09 |
Performance of various quantum-key-distribution systems using 1.55 up-conversion single-photon detector |
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| Jiao Rong-Zhen,Feng Chen-Xu,Ma Hai-Qiang. Performance of various quantum-key-distribution systems using 1.55 up-conversion single-photon detector[J]. Acta Physica Sinica, 2008, 57(3): 1352-1355 |
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| Authors: | Jiao Rong-Zhen Feng Chen-Xu Ma Hai-Qiang |
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| Abstract: | The performance of various quantum-key-distribution (QKD) systems is analyzed using 1.55 μm up-conversion single-photon detector. The dependence of quantum efficiency and dark count rate change on the pump power was also discussed. The comparison is based on the secure communication rate as a function of distance for three QKD protocols: the Bennett-Brassard 1984, the Bennett-Brassard-Mermin 1992, and the coherent differential-phase-shift keying protocols. We show that the up-conversion detector allows for higher communication rate and longer communication distance than the commonly used InGaAs/InP APD for all three QKD protocols, and the properties of quantum key distribution system can be greatly improved by this detector. |
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| Keywords: | quantum efficiency communication rate dark count rate |
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