Demodulation of Fabry-Perot sensors using random

被引:18
作者
Liang, Qin [1 ]
Tao, Jinchao [1 ]
Wang, Xu [1 ]
Wang, Tianglian [1 ]
Gao, Xinyu [1 ]
Zhou, Pengwei [1 ]
Xu, Ben [1 ]
Zhao, Chunliu [1 ]
Kang, Juan [1 ]
Wang, Le [1 ]
Shen, Chengyu [1 ]
Wang, Dongning [1 ]
LI, Yi [1 ]
机构
[1] China Jiliang Univ, Coll Opt & Elect Technol, Hangzhou 310018, Peoples R China
基金
中国国家自然科学基金;
关键词
HIGH-PRESSURE; EFPI SENSORS; FIBER; INTERFEROMETER;
D O I
10.1364/OL.465212
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Random speckles are proposed to demodulate Fabry-Perot (FP) sensors in this study. A piece of multimode fiber is used to interrogate the FP transmission spectrum, and tiny spectral changes lead to significant variations in the gen-erated speckle patterns. In the demonstration experiments, the pressure resolution of 0.001 MPa can be obtained from an open cavity FP sensor based on the convolutional neural network (CNN) demodulation algorithm. It is worth noting that the spectral differences in neighboring orders can be precisely distinguished due to the high sensitivity of speck-les. Thus, the fringe-order ambiguity problem is solved and the dynamic measurement range can be greatly improved. The speckle-based demodulation scheme provides a new way to balance resolution, dynamic range, speed, and cost of FP sensors. (c) 2022 Optica Publishing Group
引用
收藏
页码:4806 / 4809
页数:4
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