SiPM-based LiDAR with multipulse sequence modulation and multithreshold signal processing

A light detection and range technology (LiDAR) system that enables rapid ranging under extremely low signal-to-noise ratios (SNRs) during daylight conditions based on a SiPM (silicon photomultiplier) detector is proposed. The system emits a sequence of modulated laser pulses by controlling the semic...

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Bibliographic Details
Published in:Optics letters 2024-10, Vol.49 (20), p.5727
Main Authors: Liu, Zhihao, Zeng, Yinong, Li, Chong, Yi, Zihan, Tao, Xiaonan, Zhao, Hui, Qiu, Jian, Liu, Kefu
Format: Article
Language:English
Subjects:
Daylight
Extreme values
Lidar
Photomultiplier tubes
Semiconductor lasers
Signal processing
Signal to noise ratio
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Summary:A light detection and range technology (LiDAR) system that enables rapid ranging under extremely low signal-to-noise ratios (SNRs) during daylight conditions based on a SiPM (silicon photomultiplier) detector is proposed. The system emits a sequence of modulated laser pulses by controlling the semiconductor laser and then processes the SiPM response signals using dynamic multithreshold. The experimental result shows that, under extremely low SNR of daylight, the system achieves a 100 success rate in continuous ranging of a low reflectivity target at 125 m, with a ranging precision of less than 20 cm and a ranging time of less than 10 µs. Our system provides a significant reference value for achieving high-speed, noise-resistant, miniaturized, practical, and low-cost LiDAR based on a SiPM.
ISSN:0146-9592
1539-4794
1539-4794
DOI:10.1364/OL.537406