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Cascaded FPI/LPFG interferometer for high-precision simultaneous measurement of strain and temperature

机译：级联的FPI / LPFG干涉仪，用于高精度同时测量应变和温度

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摘要

An all-fiber and low-cost strain and temperature sensor realized by the cascaded FPI/LPFG interferometer was developed. This device consists of an input single mode fiber (SMF), hollow core fibers (HCF), a long-period fiber grating (LPFG) inscribed by the CO2 laser pulses, and an output SMF. The Fabry-Perot interferometer (FPI) is insensitive to temperature and its reflective spectrum is utilized for strain measurement while the transmission spectrum of the LPFG is only utilized for temperature measurement. The actual measurement shows that the strain sensitivity of the proposed hybrid FPI/LPFG sensor can reach 4.16 pm/mu epsilon within the strain range of 0-1500 mu epsilon, meanwhile, the temperature sensitivity is 135.19 pm/degrees C when the temperature rises from room temperature to 82.11 degrees C. In addition, the proposed hybrid FPI/LPFG sensor has excellent linear response characteristics, and the R-Square values of the linear fitting curve of strain and temperature are 0.9995 and 0.9936, respectively. Therefore, the proposed hybrid FPI/LPFG sensor can simultaneously measure strain and temperature in the same location in the application field.
机译：开发了由级联的FPI / LPFG干涉仪实现的全光纤，低成本应变和温度传感器。该设备由输入单模光纤（SMF），空心光纤（HCF），CO2激光脉冲刻画的长周期光纤光栅（LPFG）和输出SMF组成。法布里-珀罗干涉仪（FPI）对温度不敏感，其反射光谱用于应变测量，而LPFG的透射光谱仅用于温度测量。实际测量结果表明，所提出的混合式FPI / LPFG传感器在0-1500με应变范围内的应变灵敏度可以达到4.16 pm / muε，同时，当温度从0上升时，温度灵敏度为135.19 pm /℃。室温下可达到82.11摄氏度。此外，提出的FPI / LPFG混合传感器具有出色的线性响应特性，应变和温度线性拟合曲线的R-Square值分别为0.9995和0.9936。因此，所提出的混合式FPI / LPFG传感器可以在应用领域的同一位置同时测量应变和温度。

著录项

  • 来源
    《Optical fiber technology》 |2019年第12期|102025.1-102025.5|共5页
  • 作者

  • 作者单位

    Northeastern Univ Coll Informat Sci & Engn Shenyang 110819 Liaoning Peoples R China|Northwestern Univ Ctr Smart Struct & Mat Evanston IL 60208 USA;

    Northeastern Univ Coll Informat Sci & Engn Shenyang 110819 Liaoning Peoples R China|Northeastern Univ State Key Lab Synthet Automat Proc Ind Shenyang 110819 Liaoning Peoples R China;

    Northwestern Univ Ctr Smart Struct & Mat Evanston IL 60208 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Optic-fiber sensor; Simultaneous measurement of strain and temperature; Hollow-core fiber; Fabry-Perot interferometer; Long-period fiber grating;

    机译：光纤传感器同时测量应变和温度;中空纤维法布里-珀罗干涉仪;长周期光纤光栅;

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