Temperature-insensitive parallel dual FPI strain sensor based on the vernier effect

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-04-16 DOI:10.1016/j.optcom.2025.131871

Wei Li , Jingwei Lv , Xili Lu , Chao Liu , Renfeng Li , Liangliang Li , Weijie Kong , Qiang Liu , Jianing Shi , Wei Liu , Pan Meng , Xinrui Guo , Paul K. Chu

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Abstract

A temperature-insensitive Fabry-Pérot interferometer (FPI) based on the Vernier effect is proposed for strain measurement. Two structurally similar FPIs are prepared with a fusion splicer, and the air cavity in the middle forms the Fabry-Pérot cavity. The one FPI with a thinner wall serves as the sensing cavity, and the other is the reference cavity. The strain sensitivity of the optical fiber sensor for 0–600 με is 131.7 pm/με, which is 9 times higher than that of the single structure FPI. It has a temperature sensitivity of 2.7 pm/°C and a temperature cross-sensitivity of 0.021 με/°C in the temperature range between 25 and 200 °C. The sensor has excellent repeatability and stability in strain measurements. The results show that the strain sensor is simple, cost-effective, and easy to fabricate. In conjunction with its high sensitivity, it has great commercial potential in strain measurements, especially in complex temperature environments.

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基于游标效应的温度不敏感平行双FPI应变传感器

提出了一种基于游标效应的温度不敏感法布里-普氏干涉仪（FPI）。用融合剪接器制备两个结构相似的fpi，中间的空腔形成法布里-帕姆罗腔。其中一个壁较薄的FPI作为传感腔，另一个作为参考腔。光纤传感器在0 ~ 600 με范围内的应变灵敏度为131.7 pm/με，是单结构光纤传感器应变灵敏度的9倍。在25 ~ 200℃的温度范围内，温度灵敏度为2.7 pm/℃，温度交叉灵敏度为0.021 με/℃。该传感器在应变测量中具有良好的重复性和稳定性。结果表明，该应变传感器结构简单、成本低、易于制作。结合其高灵敏度，它在应变测量中具有很大的商业潜力，特别是在复杂的温度环境中。

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.