Fig. 1. Counting principle diagram of TCSPC

Fig. 2. Three types of photon transmission

Fig. 3. Flowchart of the Monte Carlo simulation of photonic transmission

Fig. 4. Reconstruction process of fog-transparent imaging

Fig. 5. Results of laser transmission characteristics at different wavelengths. (a) Attenuation coefficient varies with visibility; (b) transmittance varies with distance; (c) time delay varies with distance; (d) time delay varies with visibility

Fig. 6. Echo photon distribution maps. (a) Visibility is 10 km, distance is 10 km; (b) visibility is 20 km, distance is 20 km; (c) visibility is 20 km, distance is 10 km

Fig. 7. Results of different algorithms for target reconstruction image