Journal
OPTICS LETTERS
Volume 47, Issue 14, Pages 3568-3571Publisher
Optica Publishing Group
DOI: 10.1364/OL.463007
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Funding
- National Natural Science Foundation of China [12104443, 62031024, 21XD1403800]
- Shanghai Science andTechnology Development Foundation [22JC1402900]
- Shanghai Municipal Science and Technology Major Project [2019SHZDZX01]
- Special Project for Research and Development in Key areas of Guangdong Province [2020B0303020001]
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This paper proposes a photon-efficient approach for FMCW LIDAR, utilizing single-photon detectors and neighboring pixel data to improve depth estimation accuracy, achieving high-quality 3D imaging in low-flux conditions.
Frequency-modulated continuous-wave (FMCW) light detection and ranging (LIDAR), which offers high depth resolution and immunity to environmental disturbances, has emerged as a strong candidate technology for active imaging applications. In general, hundreds of photons per pixel are required for accurate three-dimensional (3D) imaging. When it comes to the low-flux regime, however, depth estimation has limited robustness. To cope with this, we propose and demonstrate a photon-efficient approach tier FMCW LIDAR. We first construct a FMCW LIDAR setup based on single-photon detectors where only a weak local oscillator is needed for the coherent detection. Further, to realize photon-efficient imaging, our approach borrows the data from neighboring pixels to enhance depth estimates, and employs a total-variation seminorm to smooth out the noise on the recovered depth map. Both simulation and experiment results show that our approach can produce high-quality 3D images from -10 signal photons per pixel, increasing the photon efficiency by 10-fold over the traditional processing method. The high photon efficiency will be valuable for low-power and rapid FMCW applications. (C) 2022 Optica Publishing Group
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