Dongping Wang, Wei Wang, Junying Zhang, Xiongxing Zhang, Haibin Chen, Zilong Guo. Peak-to-Peak and Interference-Order Positioning Joint Demodulation Algorithm for Fiber-Optic Fabry-Perot Sensors[J]. Acta Optica Sinica, 2022, 42(16): 1628001
- Acta Optica Sinica
- Vol. 42, Issue 16, 1628001 (2022)
Fig. 1. Typical structure of fiber-optic FP sensor
Fig. 2. Reflection spectra of FP sensors with different fineness
Fig. 3. Flow chart of peak-to-peak (P2P) and interference-order-positioning joint demodulation algorithm
Fig. 4. Simulation of P2P and interference-order-positioning joint demodulation algorithm. (a) Reflection spectrum for cavity length of 125 μm; (b) cavity lengths corresponding to different interference orders and their deviations from P2P estimated cavity length
Fig. 5. Experimental setup of cavity length demodulation system for FP sensors
Fig. 6. Experimental results of P2P and interference-order-positioning joint demodulation algorithm. (a) Reflection spectrum of demodulated by 4th FP sensor; (b) cavity lengths corresponding to different interference orders and their deviations from P2P estimated cavity length
Fig. 7. Demodulation results of 100 repeated experiments. (a) Demodulation results of P2P method; (b) demodulation results of P2P and interference-order-positioning joint demodulation algorithm
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Table 1. Simulated cavity length demodulation results for FP sensors with cavity lengths of 55-135 μm
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Table 2. Demodulation experimental results for FP sensors with cavity lengths of 55-135 μm
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