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中文摘要：
报道了一种基于表面等离子体共振(SPR)的多模光纤H2敏传感器,是通过化学腐蚀多模光纤使纤芯裸露再镀上Pd-Ag合金膜所构成,并给出了相应的理论分析和实验制作过程。理论分析表明,对于0～4%范围内的H2浓度,兼顾测量范围、灵敏度和响应时间,合金膜厚度选择在20nm附近为宜;实验研究结果显示,用20nm厚的Pd-Ag合金膜和15mm的光纤作用长度,在温度为26℃、相对湿度为60%的条件下,传感器能探测0～4%浓度范围内的H2,响应时间小于50s。
英文摘要：
We present a fiber hydrogen sensor based on surface plasmon resonance,which is constructed by depositing Pd/Ag alloy over an exposed core region of a multimode fiber.We also give out the theoretical analysis and the fabrication process of the sensor.The theoretical analysis shows that Pd/Ag alloy film with 20 nm thickness is good for detecting 0～4% hydrogen.Using a 20 nm Pd/Ag alloy with 1.5 cm interaction length in the experiment,we can detect hydrogen in the 0% to 4% range with corresponding response time...
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