Research on Temperature and Strain Dual Parameter Sensing of Few Mode Fiber Grating

SHAO Bocheng; HUANG Yonglin

doi:10.13756/j.gtxyj.2024.230011

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Research on Temperature and Strain Dual Parameter Sensing of Few Mode Fiber Grating

更新时间：2024-08-05

- Research on Temperature and Strain Dual Parameter Sensing of Few Mode Fiber Grating
- Study on Optical Communications Issue 4, Pages: 23001101-23001105(2024)
- 作者机构：
  
  南京邮电大学　电子与光学工程学院、柔性电子(未来技术)学院，南京　210023
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2024.230011
  CLC： TP212
- Published：10 August 2024，
  
  Received：10 June 2023，
  
  Revised：04 August 2023，
- 稿件说明：
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邵伯成，黄勇林. 少模光纤光栅温度和应变双参量传感研究[J]. 光通信研究，2024(4)：230011.

Shao B C, Huang Y L. Research on Temperature and Strain Dual Parameter Sensing of Few Mode Fiber Grating[J]. Study on Optical Communications, 2024(4)：230011.
邵伯成，黄勇林. 少模光纤光栅温度和应变双参量传感研究[J]. 光通信研究，2024(4)：230011. DOI： 10.13756/j.gtxyj.2024.230011.

Shao B C, Huang Y L. Research on Temperature and Strain Dual Parameter Sensing of Few Mode Fiber Grating[J]. Study on Optical Communications, 2024(4)：230011. DOI： 10.13756/j.gtxyj.2024.230011.

摘要

【目的】

针对光纤布拉格光栅（FBG）传感时温度和应变的交叉敏感问题，文章对少模光纤（FMF）-FBG各个模式温度和应变的响应特性进行了研究，提出了一种四模FBG的温度和应变双参量传感器。

【方法】

FMF内可以同时传输基模和少数几个高阶模，兼顾单模光纤（SMF）低模式色散和多模光纤低非线性的优势，可以同时用于多个物理

量的传感。通过分析FMF-FBG中LP

模式在不同温度下应变的光功率灵敏度的不同，结合该模式下波长与温度和应变都有良好的线性度，从而实现了FMF-FBG的温度和应变双参量传感。

【结果】

研究结果表明，文章所提传感器可以较好地解决FBG传感时温度和应变的交叉敏感问题。

【结论】

相比于SMF-FBG，FMF-FBG同时拥有几个不同模式的反射峰，不仅可以解决温度和应变的交叉敏感问题，还可以大大提高传感的精度和稳定性，在新型传感领域有着很好的应用前景。

Abstract

【Objective】

In order to solve the problem of cross sensitivity of temperature and strain in Fiber Bragg Grating (FBG) sensing

the response characteristics of temperature and strain in each mode of Few Mode Fiber (FMF)-FBG were studied in this paper. A four-mode FBG temperature and strain dual parameter sensor was also proposed.

【Methods】

The basic mode and a few higher modes can be transmitted simultaneously in the low-mode fiber

taking into account the advantages of low mode dispersion of Single Mode Fiber (SMF) and low nonlinearity of multi-mode fiber

which can be used for sensing multiple physical quantities at the same time. By analyzing the different optical power sensitivity of the LP

mode in the FMF-FBG at different temperatures

and considering the good linearity of wavelength

temperature and strain under this mode. Thus

the temperature and strain dual parameter sensing of FMF-FBG is realized.

【Results】

The results show that the sensor can better solve the problem of cross sensitivity of temperature and strain.

【Conclusion】

Compared with SMF-FBG

the FMF-FBG has several reflection peaks of different modes at the same time

which can not only solve the cross-sensitivity problem of temperature and strain

but also greatly improve the accuracy and stability of sensing

which may have a good application prospect in the field of new type of sensing.

关键词

光纤传感技术少模光纤布拉格光栅模式双参量传感

Keywords

optical fiber sensing technologyFMF-FBGmodetwo parameter sensing

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