Kaikai Wu, Boya Xie, Lin Chen, Songqing You, Zhewen Xiong, Peng Yang. Optical measurement method of shot noise limit micro-vibration based on optical polarization control[J]. Infrared and Laser Engineering, 2023, 52(7): 20220872
- Infrared and Laser Engineering
- Vol. 52, Issue 7, 20220872 (2023)
Fig. 1. Measurement model of object micro-vibration signal
Fig. 2. Numerical simulation results of vibration displacement
Fig. 3. Experimental optical path for measuring micro-vibration signal of object
Fig. 4. (a) Optical path of frequency shift optical; (b) Physical diagram of AOM; (c) 5.5 MHz beat frequency test results
Fig. 5. (a) Micro-vibration signal optical path diagram; (b) Physical diagram of PZT; (c) Vibration displacement calibration of PZT
Fig. 6. (a) Balanced heterodyne detection optical path; (b) Balanced detector
Fig. 7. (a) Noise power spectrum data of Span=10 MHz; (b) Experimental optical path
Fig. 8. Noise power of local oscillator light
Fig. 9. Noise power of vibration signals from 2-10 Hz
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Table 1. Test conditions for noise power measurement
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Table 2. Experimental results from 2-10 Hz
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