Optical hydrogen sensor based on etched fiber Bragg grating sputtered with Pd/Ag composite film

被引：106
作者：
Dai, Jixiang [1 ]
Yang, Minghong [1 ]
Yu, Xun [2 ]
Lu, Hong [2 ]
机构：
[1] Wuhan Univ Technol, Natl Engn Lab Opt Fiber Sensing Technol, Wuhan 430070, Peoples R China
[2] Huazhong Univ Sci & Technol, Dept Control Sci & Engn, Wuhan 430074, Peoples R China
来源：
OPTICAL FIBER TECHNOLOGY | 2013年 / 19卷 / 01期
基金：
美国国家科学基金会;
关键词：
Etched FBG; Pd/Ag composite film; Magnetron sputtering; Hydrogen sensor; SENSING MATERIALS; PALLADIUM; MEMBRANES; LAYERS; PROBE;
D O I：
10.1016/j.yofte.2012.09.006
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A novel fiber optical fiber hydrogen sensor based on etched fiber Bragg grating coated with Pd/Ag composite film is proposed in this paper. Pd/Ag composite films were deposited on the side-face of etched fiber Bragg grating (FBG) as sensing elements by magnetron sputtering process. The atomic ratio of the two metals in Pd/Ag composite film is controlled at Pd:Ag = 76:24. Compared to standard FBG coated with same hydrogen sensitive film, etched FBG can significantly increase the sensor's sensitivity. When hydrogen concentrations are 4% in volume percentage, the wavelength shifts of FBG-125 mu m, FBG-38 mu m and FBG-20.6 mu m are 8, 23 and 40 pm respectively. The experimental results show the sensor's hydrogen response is reversible, and the hydrogen sensor has great potential in hydrogen's measurement. (C) 2012 Elsevier Inc. All rights reserved.
引用
收藏
页码：26 / 30
页数：5
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