Acta Optica Sinica, Volume. 39, Issue 6, 0606001(2019)
Elliptical-Fitting Cavity Length Demodulation Algorithm for Compound Fiber-Optic Fabry-Perot Pressure Sensor with Short Cavity
A reflection spectrum model of a compound fiber-optic Fabry-Perot (FP) pressure sensor with short length is established, a two-parameter ellipse-fitting cavity length demodulation algorithm is proposed, and the demodulation for FP-cavity lengths in the range of 26-30 μm is simulated. The results show that the maximum error for the demodulated two-parameter ellipse-fitting cavity length is only 0.05 μm. A demodulation system for the fiber-optic FP sensor is established, and the experiments under different pressures are conducted. A 20-kHz demodulation rate is achieved. Thus, the feasibility and real-time performance of the proposed algorithm for demodulating a compound fiber-optic FP pressure sensor with a short cavity are verified.
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Wei Wang, Ying Tang, Xiongxing Zhang, Haibin Chen, Zilong Guo, Kening Wang. Elliptical-Fitting Cavity Length Demodulation Algorithm for Compound Fiber-Optic Fabry-Perot Pressure Sensor with Short Cavity[J]. Acta Optica Sinica, 2019, 39(6): 0606001
Category: Fiber Optics and Optical Communications
Received: Dec. 28, 2018
Accepted: Feb. 13, 2019
Published Online: Jun. 17, 2019
The Author Email: Wang Wei (wangwei@xatu.edu.cn)