温度不敏感的光纤应变传感器是由两个平行连接的Fabry-Perot干扰仪与气泡制成的
Han Zhang1, Chao Jiang1, Jin Hu1
1College of Physics and Electronic Science, Hubei Normal University, Huangshi, Hubei 435002, China.
The Review of scientific instruments
|December 11, 2023
概括
一种新的应变传感器利用两个法布里-佩罗干扰仪 (FPI) 的并行连接. 较小的气泡FPI显示出更高的应变灵敏度,Vernier增强的传感器显示出显著提高的性能和最小温度交叉灵敏度.
科学领域:
- 光纤传感器 光纤传感器
- 干涉测量是干涉测量的方法.
- 应变传感技术 应变传感技术
背景情况:
- 法布里-佩罗干扰仪 (FPI) 是对外部刺激敏感的光学传感器.
- 单模光纤 (SMF) 制造技术使微型光学结构成为可能.
- 维尼尔效应通过结合多个干扰仪来提高传感器的灵敏度.
研究的目的:
- 提出并演示基于平行FPI配置的新型应变传感器.
- 为了研究气泡大小对FPI菌株敏感性的影响.
- 使用维尼尔效应增强应变灵敏度,并评估温度交叉灵敏度.
主要方法:
- 使用秒激光处理SMF制造FPI,以创建微气泡.
- 制造FPI具有不同的气泡大小 (63,78,93微米).
- 平行连接FPI以创建维尼尔效应应变压传感器.
主要成果:
- 对于减少气泡大小,FPI的应变灵敏度为2.9,2.0和1.5分钟/米.
- 弗尼耶效应应变压传感器实现了 -14.9 和 -14.5 pm/με 的灵敏度,分别增加了 5.1 倍和 7.3 倍.
- 拟议的传感器表现出极低的温度交叉灵敏度,由于空气腔的FPI.
结论:
- 较小的气泡FPI产生更高的应变灵敏度.
- 与弗尼耶效应并行的FPI配置显著放大了应变灵敏度.
- 开发的传感器具有高应变灵敏度和微不足道的温度交叉灵敏度,适用于精确的测量.
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