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Single-photon imaging over 200 km
Optica ( IF 10.4 ) Pub Date : 2021-03-09 , DOI: 10.1364/optica.408657
Zheng-Ping Li , Jun-Tian Ye , Xin Huang , Peng-Yu Jiang , Yuan Cao , Yu Hong , Chao Yu , Jun Zhang , Qiang Zhang , Cheng-Zhi Peng , Feihu Xu , Jian-Wei Pan

Long-range active imaging has widespread applications in remote sensing and target recognition. Single-photon light detection and ranging (lidar) has been shown to have high sensitivity and temporal resolution. On the application front, however, the operating range of practical single-photon lidar systems is limited to about tens of kilometers over the Earth’s atmosphere, mainly due to the weak echo signal mixed with high background noise. Here, we present a compact coaxial single-photon lidar system capable of realizing 3D imaging at up to 201.5 km. It is achieved by using high-efficiency optical devices for collection and detection, and what we believe is a new noise-suppression technique that is efficient for long-range applications. We show that photon-efficient computational algorithms enable accurate 3D imaging over hundreds of kilometers with as few as 0.44 signal photons per pixel. The results represent a significant step toward practical, low-power lidar over extra-long ranges.

中文翻译:

单光子成像超过200公里

远程主动成像在遥感和目标识别中具有广泛的应用。单光子光检测和测距(激光雷达)已显示具有高灵敏度和时间分辨率。但是,在应用方面,实际的单光子激光雷达系统的工作范围限制在整个地球大气层约数十公里,这主要是由于回声信号弱且背景噪声高所致。在这里,我们提出了一种紧凑的同轴单光子激光雷达系统,该系统能够实现高达201.5 km的3D成像。这是通过使用高效的光学设备进行收集和检测来实现的,我们认为这是一种对远程应用有效的新型噪声抑制技术。我们证明,光子效率高的计算算法可以在数百公里内进行精确的3D成像,每个像素只有0.44个信号光子。结果表明,在超长距离范围内向实用的低功率激光雷达迈出了重要的一步。
更新日期:2021-03-21
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