High-Sensitivity Strain Sensor Using Chaotic Correlation FLRD With Weak Fiber Bragg Grating

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2025-06-13 DOI:10.1109/LPT.2025.3579495

Xiaomin Fu;Weijie Ding;Linlin Fan;Ruixin Yang;Juanfen Wang;Yuxin Bai;Lingzhen Yang

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引用次数: 0

Abstract

A weak fiber Bragg grating is used as the sensing element. The relationship between the ring down time of autocorrelation curves of the chaotic laser and the wavelength shift of the FBG caused by strain is analyzed theoretically and experimentally. The effect of strain on the central wavelength of the FBG is characterized by the ring down time of autocorrelation curve of the reflected and transmitted signals of the fiber loop cavity. The reflected signal achieves a maximal sensitivity of 0.67731 ns/

$\mu \varepsilon $

in the 0-

$100\mu \varepsilon $

and 500-

$600\mu \varepsilon $

ranges, where spectral interaction is weak, while the transmitted signal provides a maximal sensitivity of 0.1093 ns/

$\mu \varepsilon $

in the 100-

$500\mu \varepsilon $

range. With an 8.2 m fiber loop cavity, this dual-signal method significantly extends the measurement range while maintaining high sensitivity throughout the detection range.

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基于弱光纤光栅的混沌相关FLRD高灵敏度应变传感器

采用弱光纤布拉格光栅作为传感元件。从理论上和实验上分析了混沌激光自相关曲线的衰环时间与光纤光栅因应变引起的波长位移之间的关系。应变对光纤光栅中心波长的影响通过光纤环路腔反射和传输信号的自相关曲线的衰减时间来表征。在光谱相互作用较弱的0- $100\mu \varepsilon $和500- $600\mu \varepsilon $范围内，反射信号的最大灵敏度为0.67731 ns/ $\mu \varepsilon $，而在100- $500\mu \varepsilon $范围内，发射信号的最大灵敏度为0.1093 ns/ $\mu \varepsilon $。使用8.2 m光纤环路腔，这种双信号方法显着扩展了测量范围，同时在整个检测范围内保持高灵敏度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.