Fig. 1. Experiment layout for ASE noise measurement. (a) Biaxial single-photon lidar receiver; (b) coaxial single-photon lidar system

Fig. 2. Measured data of ASE noise and comparison of photon counts received after ASE noise mitigation. (a) ASE noise of coaxial lidar and its fitting curve; (b) comparison of photon counts after ASE noise mitigation of coaxial lidar with biaxial lidar

Fig. 3. Comparison of extinction coefficient data retrieved from coaxial and biaxial single-photon lidars. (a) Comparison of extinction coefficient data of coaxial lidar with biaxial lidar; (b) relative deviation of extinction coefficient data