Extrinsic Fabry-Perot interferometric optical fiber hydrogen detection system.
Extrinsic Fabry-Perot interferometric optical fiber hydrogen detection system.
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DOI：
10.1364/ao.49.002736
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发表时间：
2010-05
期刊：
影响因子：
1.9
通讯作者：
Zhen Yang;Min Zhang;Y. Liao;Qian Tian;Qisheng Li;Yi Zhang;Z. Zhuang
中科院分区：
文献类型：
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作者：
Zhen Yang;Min Zhang;Y. Liao;Qian Tian;Qisheng Li;Yi Zhang;Z. Zhuang
提出了一种新的氢气传感器系统的基础上使用的光纤非本征法布里-珀罗干涉仪涂钯银（Pd-Ag）膜。这种传感器的感测机制是基于当Pd-Ag膜吸收氢时在Pd-Ag膜中引起的机械应力。为了获得气隙的绝对长度，引入了一种改进的互相关信号处理方法。两个不同厚度的Pd-Ag膜之间的比较的结果。提出了一种基于光开关的温度补偿方法。该传感器适用于监测低于爆炸下限的氢气浓度。
We present a new hydrogen sensor system based on the use of an optical fiber extrinsic Fabry-Perot interferometer coated with palladium silver (Pd-Ag) film. The sensing mechanism of such a sensor is based on the mechanical stress that is induced in the Pd-Ag film when it absorbs hydrogen. To obtain the absolute length of the air gap, a modified cross-correlation signal processing method is introduced. Results are presented for a comparison between two Pd-Ag films of different thicknesses. A temperature compensation method based on an optical switch is presented. The sensor is suitable for monitoring concentrations of hydrogen below the lower explosive limit.