Fig. 1. Schematic diagram of self-mixing interference

Fig. 2. Self-mixing vibration measuring system

Fig. 3. Simulation results of reconstruction. (a) Unwrapped phase of AM signal; (b) unwrapped phase of FM signal; (c) reconstructed vibration curve; (d) error of reconstruction

Fig. 4. Simulated measurement range

Fig. 5. Reconstruction errors at different optical feedback levels

Fig. 6. Experimental equipment

Fig. 7. Experimental results of reconstruction. (a) AM signal; (b) FM signal; (c) unwrapped phase of AM signal; (d) unwrapped phase of FM signal; (e) reconstructed vibration curve

Fig. 8. Vibration repeated measurement results