Fig. 1. Structure of four-quadrant detector and schematic of incident light

Fig. 2. Time distribution of pulsed light intensity

Fig. 3. Simulated response of circuit to waveform of signal

Fig. 4. Basic structure diagram of back propagation neural network

Fig. 5. Simulation effect of energy inversion

Fig. 6. Verification structure principle of circuit response model

Fig. 7. Verification system photo of circuit response model

Fig. 8. Fitting and residual statistics of inversion model