用于大范围距离测量的高速光子计数激光测距

Du Bingcheng, Pang Chengkai, Wu Di, Li Zhaohui, Peng Huan, Tao Yuliang, Wu E, Wu Guang

State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200062, China.

Beijing Institute of Space Mechanics & Electricity, Beijing, 100091, China.

Sci Rep. 2018 Mar 8;8(1):4198. doi: 10.1038/s41598-018-22675-1.

We demonstrate a high-speed photon-counting laser ranging system with laser pulses of multiple repetition rates to extend the unambiguous range. In the experiment, the laser pulses of three different repetition rates around 10 MHz were employed to enlarge the maximum unambiguous range from 15 m to 165 km. Moreover, the range of distances was increased as well, enabling the measurement on different targets of large separation distance with high depth resolution. An outdoor photon-counting laser ranging up to 21 km was realized with high repetition rate, which is beneficial for the airborne and satellite-based topographic mapping.

我们展示了一种高速光子计数激光测距系统，该系统具有多种重复频率的激光脉冲，以扩展无模糊距离。在实验中，采用了三种频率约为10MHz的不同重复频率的激光脉冲，将最大无模糊距离从15米扩大到165公里。此外，测距范围也有所增加，能够以高深度分辨率对不同距离的大目标进行测量。利用高重复频率实现了高达21公里的户外光子计数激光测距，这对机载和星载地形测绘有益。