基于套嵌光纤光栅的高灵敏度光纤电流传感器

连铸, 2016, 33(5): 598-603. doi: 10.3969/j.issn.1007-5461.2016.05.014

基于套嵌光纤光栅的高灵敏度光纤电流传感器

李贺飞 ^1, , 徐翠萍 ^2, , 田春雨 ^3, , 宫奎 ^4, , 冯飞 ^5, , 徐峰 ^6, , 甄胜来 ^7, , 俞本立 ^8,

1.安徽大学光电信息获取与控制教育部重点实验室,安徽合肥,230601

2.安徽大学光电信息获取与控制教育部重点实验室,安徽合肥,230601

3.安徽大学光电信息获取与控制教育部重点实验室,安徽合肥,230601

4.安徽大学光电信息获取与控制教育部重点实验室,安徽合肥,230601

5.安徽大学光电信息获取与控制教育部重点实验室,安徽合肥,230601

6.安徽大学光电信息获取与控制教育部重点实验室,安徽合肥,230601

7.安徽大学光电信息获取与控制教育部重点实验室,安徽合肥,230601

8.安徽大学光电信息获取与控制教育部重点实验室,安徽合肥,230601

基金项目: Supported by National Natural Science Foundation of China(国家自然科学青年基金,61108076),Natural Science Foundation of Anhui Province(安徽省自然科学基金项目,1308085MF91),Key Research Project of Natural Science Research of Anhui Education Department(安徽省教育厅自然科学研究重点项目,KJ2011A009)

关键词：纤维与波导光学 , 光纤电流传感器 , 套嵌光纤光栅 , 镍铁合金层 , 波长漂移

High sensitivity fiber-optic current sensor based on nested fiber grating

Keywords： fiber and waveguide optics , fiber-optic current sensor , nested fiber grating , Ni-Fe alloy , wavelength shift

提出了一种基于套嵌光纤光栅的光纤电流传感器,用二次曝光法制作的长周期光栅和布拉格光栅套嵌而成的光纤光栅作为传感元件,在套嵌的光栅表面沉积一层高电阻镍铁合金作为加热电极层.电流通过时对光栅区域加热,引起光栅光谱中心波长漂移,实现了高灵敏度的电流测量.实验结果表明:所设计的光纤电流传感器电流响应灵敏度达到7.2×10-2 nm/mA,且具有结构简单、体积小等优点,在高灵敏度的光纤电流检测领域具有广泛的应用价值.

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