Single-photon imaging over 200 km
| Autor: | Jian-Wei Pan, Peng-Yu Jiang, Qiang Zhang, Yu Hong, Xin Huang, Feihu Xu, Zheng-Ping Li, Chao Yu, Jun Zhang, Cheng-Zhi Peng, Jun-Tian Ye, Yuan Cao |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Photon
Pixel Computer science Image and Video Processing (eess.IV) FOS: Physical sciences Ranging Electrical Engineering and Systems Science - Image and Video Processing Signal Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Background noise Lidar Temporal resolution FOS: Electrical engineering electronic engineering information engineering Coaxial Remote sensing Optics (physics.optics) Physics - Optics |
| Popis: | 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. 6 pages, 6 figures |
| Databáze: | OpenAIRE |
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