Demodulation of fiber-optic Fabry-Perot sensors through a double-frequency self-correlation method

被引：11

作者：

Guo, Zilong ^{[1
,2
]}

Chen, Cang ^{[1
]}

Zhang, Junying ^{[1
,2
]}

Zhang, Xiongxing ^{[1
,2
]}

Chen, Haibin ^{[1
,2
]}

Wang, Wei ^{[1
,2
]}

机构：

[1] Xian Technol Univ, Sch Optoelect Engn, Xian 710021, Peoples R China

[2] Xian Technol Univ, Shaanxi Prov Key Lab Photoelect Measurement & Ins, Xian 710021, Peoples R China

来源：

OPTICAL FIBER TECHNOLOGY | 2021年 / 64卷 / 64期

关键词：

Fiber-optic sensor; Fabry-Perot cavity; Demodulation; Self-correlation; INTERFEROMETER;

D O I：

10.1016/j.yofte.2021.102563

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

For the cavity length demodulation of fiber-optic Fabry-Perot (FP) sensors, a frequency-doubled self-correlation algorithm was proposed. Since the frequency doubling can make the self-correlation peak sharper, the peak positioning accuracy can be effectively improved for the cavity length extraction. The feasibility and performances of the proposed algorithm was investigated by both simulation and experiment. The simulated demodulation accuracy was better than 1.9 nm. The experimental demodulation resolution for a fiber-optic FP stress sensor with an initial cavity length of 79.859 mu m reached 4.32 nm.

引用

页数：6

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