Study on temperature sensing properties of different fiber Bragg grating at low temperature

2015 International Conference on Estimation, Detection and Information Fusion (ICEDIF) Pub Date : 1900-01-01 DOI:10.1109/ICEDIF.2015.7280230

Wei Bin, Wang Lei, Gao Xingjun, Hou Jingzhou, Gao Chao, Z. Yongqing

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引用次数: 1

Abstract

In this paper, in order to understand the fiber Bragg grating (FBG) sensor's temperature sensing properties with different coating materials and packaging materials at low temperature, and choose a FBG sensor for engineering application, an experimental platform is designed at first, the temperature sensing performance of five different type of FBG sensors at low temperature (77K-296K) is studied, and then the wavelength-temperature curve and temperature sensitive coefficient curve of these five FBG sensors is analyzed. At last, a nonlinear fitting for the best wavelength-temperature curve is made to provide a reference for practical application. It is concluded that polyimide-coated FBG sensor can be used normally at low temperature, and the temperature sensitive coefficient increases 4.32pm/K as reference to bare FBG, packaging has few effect on the sensor's performance of grating sensors. The OS4200 whose wavelength-temperature curve's cubic curve fitting is better than quadratic curve fitting has high accuracy and good stability, it can meet the requirement in practical engineering.

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不同光纤布拉格光栅低温感温特性的研究

本文为了了解光纤布拉格光栅(FBG)传感器在不同涂层材料和封装材料下的低温感温性能，并选择一种适合工程应用的FBG传感器，首先设计了实验平台，研究了五种不同类型的FBG传感器在低温(77K-296K)下的感温性能。然后分析了这五种光纤光栅传感器的波长-温度曲线和温度敏感系数曲线。最后对最佳波长-温度曲线进行了非线性拟合，为实际应用提供参考。结果表明，在低温下，聚酰亚胺涂层的光纤光栅传感器可以正常使用，相对于裸光纤光栅，其温度敏感系数提高了4.32pm/K，封装对光栅传感器的性能影响较小。OS4200波长-温度曲线的三次拟合优于二次曲线拟合，精度高，稳定性好，可以满足实际工程的要求。

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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2015 International Conference on Estimation, Detection and Information Fusion (ICEDIF)

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