Liu Zhihao, Zeng Yinong, Li Chong, Yi Zihan, Tao Xiaonan, Zhao Hui, Qiu Jian, Liu Kefu
Opt Lett. 2024 Oct 15;49(20):5727-5730. doi: 10.1364/OL.537406.
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.
提出了一种基于硅光电倍增管（SiPM）探测器的光探测与测距技术（LiDAR）系统，该系统能够在日光条件下极低信噪比（SNR）情况下实现快速测距。该系统通过控制半导体激光器发射一系列调制激光脉冲，然后使用动态多阈值处理SiPM响应信号。实验结果表明，在日光极低信噪比情况下，该系统对125米处低反射率目标连续测距成功率达100%，测距精度小于20厘米，测距时间小于10微秒。我们的系统为基于SiPM实现高速、抗噪声、小型化、实用且低成本的LiDAR提供了重要参考价值。
