H2 Sensing Based on a Pd-Coated Tapered-FBG Fabricated by DUV Femtosecond Laser Technique
H2 Sensing Based on a Pd-Coated Tapered-FBG Fabricated by DUV Femtosecond Laser Technique
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DOI：
10.1109/lpt.2013.2239985
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发表时间：
2013-02-15
影响因子：
2.6
通讯作者：
Bartelt, Hartmut
中科院分区：
文献类型：
--
作者：
Silva, Susana;Coelho, Luis;Bartelt, Hartmut
提出了一种基于覆盖150nm厚Pd膜的锥形光纤布拉格光栅（FBG）的氢气探测传感器。采用深紫外飞秒激光技术将光纤光栅写入直径50 μ m的锥形光纤中。在125亩的光纤段内嵌入第二个光纤光栅，用于温度补偿。在室温下，传感头能检测到H-2浓度在0% ~ 1% （v/v）范围内；温度补偿后的最大灵敏度为81.8 pm/%(v/v) H-2。还讨论了Pd涂层对标准fbg和锥形fbg温度敏感性的影响。
An optical fiber probe sensor based on a tapered-fiber Bragg grating (FBG) coated with 150-nm-thick Pd film is proposed for hydrogen detection. The FBG was written in a 50-mu m-diameter tapered fiber by deep ultraviolet femtosecond laser technology. A second FBG was inscribed in the 125 mu m-fiber section for temperature compensation. The sensing head was able to detect H-2 concentration in the range 0%-1% (v/v) H-2 at room temperature; a maximum sensitivity of 81.8 pm/%(v/v) H-2 was attained with temperature compensation. The influence of the Pd coating over temperature sensitivity of standard and tapered-FBGs is also presented.