Laser radar system

Abstract

The invention provides a laser radar system which is applied to the technical field of laser, and the system comprises a switchable light source which is used for outputting an optical signal of low-coherence laser or high-coherence frequency sweeping laser; the first coupler is connected with the switchable light source and is used for carrying out beam splitting on the optical signal to obtain a first optical signal and a second optical signal; the signal path is connected with the first coupler and is used for acquiring reflected light of the target object according to the first optical signal; the reference path is connected with the first coupler and is used for adjusting the optical time delay of the reference path; the second coupler is respectively connected with the signal path and the reference path and is used for combining the reflected light and the second optical signal to obtain a third optical signal; the photoelectric detector is connected with the reference path and is used for detecting the third optical signal and converting the third optical signal into an electric signal; and the analog-to-digital converter is connected with the photoelectric detector and is used for quantifying and storing the electric signal. According to the invention, coarse measurement and fine measurement of the distance of the target object can be realized through the switchable light source, so that the spatial distance of the target is obtained. 本申请提出激光雷达系统，应用于激光技术领域，包括：可切换光源，用于输出低相干激光或高相干扫频激光的光信号；第一耦合器，与可切换光源连接，用于对光信号进行分束，得到第一光信号和第二光信号；信号路，与第一耦合器连接，用于根据第一光信号获取目标物体反射光；参考路，与第一耦合器连接，用于调整参考路的光时延；第二耦合器，分别与信号路与参考路连接，将反射光和第二光信号进行合束，得到第三光信号；光电探测器，与参考路连接，用于探测第三光信号并将第三光信号转化为电信号；模数转换器，与光电探测器连接，用于量化并存储电信号。本申请能够通过可切换光源，实现对目标物体的距离进行粗测量和细测量，从而得到目标的空间距离。