Fig. 1. Design flow chart of laser energy test

Fig. 2. Circuit structure diagram of high-speed photodetection

Fig. 3. Comparison of the synchronization signal and echo signal of laser emission

Fig. 4. Relationship between APD laser responsivity and laser wavelength (M=1)

Fig. 5. Energy meter test results

Fig. 6. Voltage signal received by the APD module

Fig. 7. Relationship between PMT responsivity and laser wavelength

Fig. 8. Energy meter test results

Fig. 9. Voltage signal received by the PMT module

Fig. 10. Overall configuration diagram of the experiment set

Fig. 11. Upper computer control panel of the laser

Fig. 12. Laser test chart based on PMT module