Fig. 1. 32-channel time-resolved single-photon detection system

Fig. 2. Working principle of the 32-channel single-photon data acquisition system

Fig. 3. The single photon electrical pulse signal

Fig. 4. High-speed digital signal reading principle

Fig. 5. Schematic diagram of the experimental setup for evaluating the nearest resolvable adjacent photons

Fig. 6. Statistical comparison of time interval between neighboring photons

Fig. 7. Laser induced spectrum detection experimental setup based on 32-channel time-resolved single-photon detection system

Fig. 8. Spectral response curves of channel 15 and 16 measured by monochromator

Fig. 9. Variations of echo signal at channel 16 while changing distance of the target

Fig. 10. Relationship between Maximum signal position and the target relative distance

Fig. 11. Original photon data and histogram of channel 11

Fig. 12. Difference of the laser induced spectrum while the observation targets are pure and natural water respectively