Fig. 1. Schematic diagram and experimental setup of the FMCW lidar system using 632 nm. (a) Schematic diagram of the FMCW lidar system using 632 nm. BS: beam splitter, PD: photodetector, DSO: digital storage oscilloscope; (b) Experimental setup of the FMCW lidar system

Fig. 2. Experimental results of distance and velocity measurement of the FMCW lidar system using 632 nm. (a) The linear fit between the measured distance and the reference distance for the FMCW system; (b) Comparison of the measured speeds and their linear fits in the FMCW and CW systems