基于基模高斯光束的单光子捕获概率研究

详细信息

The research of single photon acquisition probability based on the fundamental-mode Gaussian beam

1.
National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China;
2.
College of Applied Sciences, Harbin University of Science and Technology, Harbin 150080, China

摘要: 建立了一种自由空间量子密钥分配的单光子捕获概率理论模型。基于基模高斯光束,推导了单光子捕获概率的表达式。得到影响单光子捕获概率的主要参量是发射机的跟瞄误差、光束远场发散角、发射机和接收机的链路距离和接收机天线孔径。针对低轨卫星-地面站间链路进行了数值仿真分析,得到单光子捕获概率一般在10-3~10-5量级。
- 量子密钥分配 /
- 单光子捕获概率 /
- 基模高斯光束 /
- 低轨卫星
Abstract: Theoretical model of single photon acquisition probability is established for free-space quantum key distribution.The expression of single photon acquisition probability is deduced from the fundamental-mode Gaussian beam.The parameters that influence the single photon acquisition probability are the transmitter's tracking-pointing error,the far-field divergence angle,the link distance between transmitter and receiver and the receiver's antenna aperture.The single photon acquisition probability is analyzed in numerical simulation for the link between a ground station and a satellite in a low earth orbit and it is normally on the order of 10-3~10-5.
- quantum key distribution /
- single photon acquisition probability /
- fundamental-mode Gaussian beam /
- satellite in low earth orbit

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