Enhanced sensitivity of fiber Bragg grating hydrogen sensor using flexible substrate
Enhanced sensitivity of fiber Bragg grating hydrogen sensor using flexible substrate
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DOI：
10.1016/j.snb.2014.02.069
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发表时间：
2014-06
影响因子：
8.4
通讯作者：
J. Dai;Minghong Yang;Z. Yang;Zhi Li;Yao Wang;Gaopeng Wang;Yi Zhang;Z. Zhuang
中科院分区：
文献类型：
--
作者：
J. Dai;Minghong Yang;Z. Yang;Zhi Li;Yao Wang;Gaopeng Wang;Yi Zhang;Z. Zhuang
提出了一种提高光纤光栅氢传感器灵敏度的新方法。作为传感元件，在光纤光栅的侧面和聚丙烯衬底表面沉积了Pd/Ni复合薄膜。氢敏膜中Pd和Ni的原子比控制在91：9。由于聚丙烯基片的杨氏模量较低，光纤光栅氢传感器的灵敏度得到了显著提高。光纤光栅氢气传感器波长向氢气浓度4%方向偏移146 pm，在氢气浓度测试中，传感器具有良好的线性响应和重复性。光纤光栅氢传感器在使用6个月后仍具有良好的稳定性，在氢气泄漏监测方面具有很大的潜力。
A novel method was proposed to enhance sensitivity of fiber Bragg grating (FBG) hydrogen sensor in this paper. As sensing element, Pd/Ni composite film was deposited on side-face of etched fiber Bragg grating and surface of polypropylene substrate. The atomic ratio of Pd and Ni in hydrogen sensitive film was controlled at 91:9. The sensitivity of FBG hydrogen sensor is significantly improved due to the much lower Young's modulus of polypropylene substrate. FBG hydrogen sensor has 146 pm wavelength shift towards 4% hydrogen, and the sensor shows linear response and good repeatability during hydrogen concentration test. FBG hydrogen sensor has good stability even after six months, which demonstrates its great potential in hydrogen leakage monitoring.