摘要
提出了一种基于钯涂层布喇格光栅光纤的氢浓度传感器方案。金属钯在氢环境中能够吸收一定量的氢并使其体积膨胀,而布喇格光栅光纤在应力的作用下其有效折射率和周期发生变化,导致中心波长偏移,两者结合可实现对外界环境中氢的测量。建立了外界环境氢浓度同钯涂层布喇格光纤光栅波长偏移之间的关系,通过数值分析给出光栅光纤氢浓度传感器在不同氢浓度以及温度环境中波长偏移量,并分析了其特点。
A new type of hydrogen sensors based on optical Fiber Bragg Grating (FBG) with palladium coat is proposed. When exposed to hydrogen, the palladium absorbs hydrogen and produces a change in the lattice constant, which cause a dimensional expansion.The effect of strain cause FBG wavelength shift due to both the fiber core index and the grating pitch will vary. Hydrogen detection could be realized with FBG and palladium coat.The relationship between FBG wavelength shift and hydrogen partial pressure is established.The numerical result of FBG wavelength shift in different hydrogen partial pressure is showed and the character of them is analyses.
出处
《压电与声光》
CSCD
北大核心
2005年第2期95-97,共3页
Piezoelectrics & Acoustooptics
基金
国家"八六三"资金资助项目(2002AA724040)
航天支撑技术支持项目(417010801)
关键词
布喇格光纤光栅
传感器
氢
optical fiber Bragg grating
sensors
hydrogen
