Optical Fiber Hydrogen Sensor Based on the EVA/Pd Coated Hollow Fiber
Optical Fiber Hydrogen Sensor Based on the EVA/Pd Coated Hollow Fiber
复制标题
基于EVA/Pd涂层中空纤维的光纤氢传感器
DOI：
10.1109/jphot.2022.3168009
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发表时间：
2022
影响因子：
2.4
通讯作者：
Yiwei Shi
中科院分区：
文献类型：
--
作者：
Ruijie Liu;Xian Zhang;Xiaosong Zhu;Yiwei Shi
提出了一种基于介质/金属包覆中空光纤结构的新型光纤氢传感器。将钯（Pd）层和乙烯-醋酸乙烯酯（EVA）层依次涂覆在硅胶毛细管空心芯的内表面，制成EVA/Pd涂层中空光纤传感器。建立了理论射线透射模型，分析了Pd膜和EVA膜厚度的影响。测量了不同浓度氢气填充后传感器的透射光谱。实验结果表明，随着氢浓度的增加，光谱中的干涉峰发生红移。然后通过测量干涉峰的波长得到氢的浓度。在0 ~ 4%氢浓度范围内，总位移为10.64nm，平均灵敏度为2.66 nm/%。与其他光纤氢传感器相比，该传感器具有结构简单、制作方便、成本低、灵敏度高、安全性能好等优点。
A novel optical fiber hydrogen sensor based on the dielectric/metal coated hollow fiber structure is proposed. The palladium (Pd) and ethylene-vinyl acetate (EVA) layers are sequentially coated on the inner surface of the hollow core of the silica capillary to fabricate the EVA/Pd coated hollow fiber sensor. Theoretical ray transmission model is carried out to analyze the influence of the thicknesses of the Pd and EVA films. The experimental transmission spectra of the proposed sensor filled with hydrogen gas of different concentrations are measured. The experimental results show that the interference peak in the spectrum has a red shift with the increase of hydrogen concentration. Then the hydrogen concentration can be obtained by measuring the wavelength of the interference peak. In the range of 0–4% hydrogen concentration, the total shift is 10.64nm and the average sensitivity is 2.66 nm/%. Compared to other optical fiber hydrogen sensors, the proposed sensor has the advantages of simple structure, easy fabrication, low cost, high sensitivity and good safety performance.