曲率
灵敏度(控制系统)
光纤布拉格光栅
材料科学
光学
游标尺
光电子学
波长
物理
电子工程
数学
工程类
几何学
作者
Tongtong Xie,Shichen Zheng,Mengyuan Wu,Yi Zhang,Weiyu Dai,Zuowei Xu,Hao Chen,Hongyan Fu
出处
期刊:IEEE Sensors Journal
[Institute of Electrical and Electronics Engineers]
日期:2023-12-15
卷期号:23 (24): 30429-30436
标识
DOI:10.1109/jsen.2023.3328598
摘要
We propose and experimentally demonstrate a sensitivity-enhanced fiber Bragg grating (FBG) curvature sensing system based on optoelectronic oscillator (OEO) with the enhanced Vernier effect. In this article, two FBGs with opposite wavelength shift directions are constructed by using the silicon plate, and the time delay of the two loops of OEO changes in opposite, thus realizing OEO-based sensitivity enhanced FBG curvature sensing system with the enhanced Vernier effect. The experimental results show that the sensitivity of single FBG curvature sensing system based on single-loop OEO is about 0.067 MHz/m−1, while the sensitivity of two FBGs-based curvature sensing system employing dual-loop OEO with the enhanced Vernier effect is 40.89 MHz/m−1, which is 612 times that of a single-loop OEO-based FBG curvature sensing system. Moreover, the proposed FBG curvature sensing system shows great temperature insensitivity characteristics, in which temperature sensitivity of the proposed curvature sensing system is 5.57 kHz/°C, and the curvature error caused by the change of 1 °C is $1.358\times 10^{-{4}}\,\,\text{m}^{-{1}}$ , which shows potential for realizing high sensitivity, fast, real-time demodulation in temperature-insensitive FBG curvature sensing system.
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