Fig. 1. Measurement optical path of the Mach-Zehnder interferometer

Fig. 2. Signal waveforms and Fourier frequency spectra. (a)-(f) Event 1-event 6

Fig. 3. Proportion of IMF energy per layer. (a)-(f) Event 1-event 6

Fig. 4. Waveforms of IMF₂-IMF₅ of time-domain signals in Fig. 2. (a)-(f) Event 1-event 6

Fig. 5. Frequency spectra of IMF₂-IMF₅ of time-domain signals in Fig. 2. (a)-(f) Event 1-event 6

Fig. 6. Deep learning classifier structure, two sets of one-dimensional convolutions with the same parameters

Fig. 7. Training process of Model 1. (a) train_accuracy; (b) test_accuracy; (c) train_loss; (d) test_loss

Fig. 8. Validation precision of each classifier. (a)-(f) Event 1-event 6

Fig. 9. Validation recall of each classifier. (a)-(f) Event 1-event 6