量子增强星载光子计数激光雷达阈值检测性能  

Detection performance of spaceborne photon-counting LiDAR based on quantum enhancement

作　　者：惠俊 柴洪洲[1] 向民志 杜祯强 靳凯迪 Hui Jun;Chai Hongzhou;Xiang Minzhi;Du Zhenqiang;Jin Kaidi(College of Geospatial Information,Information Engineering University,Zhengzhou 450001,China)

机构地区：[1]信息工程大学地理空间信息学院,河南郑州450001

出　　处：《红外与激光工程》2023年第4期142-152,共11页Infrared and Laser Engineering

摘　　要：星载光子计数激光雷达在遥感探测、导航测距等领域发挥着重要作用。依据光子数可分辨激光雷达的工作原理,建立了基于光量子统计理论的星载光子数可分辨激光雷达接收端的量子阈值检测模型。方案利用先进的光子数可分辨探测器件滤除未能达到最小检测信噪比的光子,并根据光量子统计规律重构信噪比检测公式,接收端的最小可检测信噪比相对经典光强检测方案进一步降低。同时分析了新型量子阈值检测方案的检测概率与虚警概率,数值仿真的结果表明,基于光子数可分辨探测的量子阈值检测方案的信噪比在少光子到达的条件下优于经典光强检测方案,且利用量子压缩态发射源可进一步增强量子阈值的检测性能。最后,进行了星载光子数可分辨激光雷达测高的仿真实验,结果表明在少量返回光子信号情形下的量子阈值检测方案的性能获得了显著增益。Objective Spaceborne photon-counting LiDAR plays a vital role in various optical detection applications such as ranging and remote sensing.The spaceborne lidar system transmits pulses and receives the detection echo signal through the satellite platform to detect the target,and then completes the ranging or altimetry task.The traditional linear system extracts the echo signal through light intensity detection,which requires high laser energy and does not make full use of photon information,resulting in low gain of linear detector.In contrast,photon-counting lidar can improve the sensitivity of the system to the response limit of a single photon,and the avalanche photodiode array detector based on Geiger mode is more capable of resolving multi-photon.In practical applications,the laser pulse signal needs to be transmitted back and forth in the space-ground long-distance space.Even though the laser intensity is very high,the number of effective signal photons that can be received is often very small.At this time,if the quantum statistical characteristics of the echo photons arriving at the receiving end of the lidar system are considered,and a reasonable quantum detection threshold is set to make judgments and estimates on the echo signal,it is expected to improve the detection performance of the spaceborne lidar system under specific circumstances.Methods According to the working principle of spaceborne photon-counting LiDAR,a quantum threshold detection model based on quantum statistics theory is established.Advanced photon-number-resolving detection devices are used to filter out photons that fail to reach the minimum detection signal-to-noise ratio,and the signalto-noise ratio detection formula are reconstructed according to the statistical law of photons.Compared with the classical intensity detection scheme,the minimum detectable signal-to-noise ratio is further reduced.At the same time,the detection probability and false alarm probability of the new quantum threshold detection scheme are analyzed.Results and

关 键 词：激光雷达 光子计数 量子增强 信噪比 检测性能 

分 类 号：TN247[电子电信—物理电子学]