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Single-photon imaging over 200 km
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DOI：10.1364/OPTICA.408657.png)
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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. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Keyword:
LASER TRANSPONDERS
RANGE
FLIGHT
AIRBORNE
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8.5
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2.4K
被引数:
2.1W
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Long-range three-dimensional active imaging with superresolution depth mapping.png)
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