Pufu Yin, Tengfei Wu, Xiaobo Chai. Vibration Measurement Method Based on Laser Self-Mixing Frequency Modulation Characteristics[J]. Laser & Optoelectronics Progress, 2021, 58(7): 0712001
- Laser & Optoelectronics Progress
- Vol. 58, Issue 7, 0712001 (2021)
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
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Table 1. Measurement results
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