摘要
提出了一种基于铜沉积二硫化钨膜包覆薄芯光纤的马赫-曾德尔干涉型气体传感器。将标准单模光纤与薄芯光纤熔接形成纤芯失配型气体传感器,借由外表面沉积铜的二硫化钨敏感膜对硫化氢气体的吸附,将气体的浓度与光谱偏移关联起来,从而达到检测低浓度硫化氢气体的目的。研究表明,该传感器对硫化氢气体的检测灵敏度为29.3pm,且在硫化氢气体体积分数为0~6×10-5的范围内显示出良好的线性关系和选择性。该传感器结构简单、灵敏度高、制备容易,特别适用于硫化氢气体的低浓度在线监测。
A gas sensor based on the Mach-Zehnder interferometer with copper-deposited tungsten disulfide coated thin-core fiber is proposed. The fiber-core mismatch-type gas sensor is formed by fusion of standard single-mode fiber and thin-core fiber. The relation between the gas concentration and the spectral shift is established by the adsorption of the copper-deposited tungsten disulfide film to the hydrogen sulfide gas. Therefore, the detection of the hydrogen sulfide gas with lower concentration can be achieved. The experimental results show that the detection sensitivity of the hydrogen sulfide gas is 29.3 pm and the sensor has a good linearity and selectivity within the gas volume fraction range of 0~ 6×10^-5 . The sensor is especially suitable for online monitoring of hydrogen sulfide gas with low concentration for the advantages of simple structure, high sensitivity and easy to manufacture.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2017年第11期47-51,共5页
Acta Optica Sinica
基金
国家自然科学基金(51574054)
重庆市高校创新团队项目(CXTDX201601030)
重庆市及重庆理工大学研究生创新项目(CYS16215
YCX2016213)
关键词
光纤光学
马赫-曾德尔干涉仪
铜
二硫化钨
硫化氢
fiber optics
Mach-Zehnder interferometer
copper
tungsten disulfide
hydrogen sulfide
