线性增益调制激光雷达系统参数对测距精度的影响

Influence of linear gain modulation lidar system parameters on ranging accuracy

增益调制非扫描激光雷达是一种新体制的激光雷达,其测距精度的研究具有重要价值。从增益调制激光雷达距离表达式出发,研究了增益调制激光雷达各系统参数对于距离精度的影响关系,综合考虑了回波强度较低时的光子噪声和距离精度较高时微通道板的增益饱和带来的影像,给出了测距精度与回波功率的关系曲线,得到了增益调制无扫描激光雷达系统存在一个回波强度区间,通过调整系统参数控制回波强度在该区间内,可以保证系统获得最高的测距精度。

Gain modulation scannerless lidar is a new system of lidar. It is significant to investigate the range resolution of the lidar system. Based on the gain modulation lidar distance expression, the relationship between gain modulation lidar system parameters and range accuracy is being under investigation. Both photon noise with the weak echo intensity and gain saturation of the microchannel plate with the high range accuracy were taken into account. Curve between ranging accuracy and echo power was given. Gain modulation scannerless lidar system has a interval of echo power. By adjusting parameters to manipulate echo power into this interval, the highest ranging accuracy can be obtained.