摘要
采用马赫 曾德尔干涉仪,对TbDyFe超磁致伸缩薄膜/光纤传感器的磁探测性能进行了实验测试。结果表明:在1kHz调制频率附近,传感器对磁场具有最大的信号响应;在恒定直流磁场及调制磁场强度小于1kA/m的条件下,系统输出信号大小随调制磁场强度线性增加;在35～50kA/m的直流磁场范围内,传感器可探测的最小磁场变化为8.6×10-2A/m。
The performances of optical fibre magnetic field sensor employing giant magnetostrictive TbDyFe film are tested by using a Mach-Zehnder interferometer. The results show that the sensor exhibits the largest responses against applied magnetic fields at the frequency of about 1 kHz.When the DC magnetic field is maintained at a fixed value,there is a good linearity between the output signal and the AC magnetic field which is below 1 kA/m.Minimum detectable field of 8.6×10-2 A/m is demonstrated in the range of 35～50 kA/m for the DC bias magnetic field and for a l meter long fibre coated with TbDyFe film.
出处
《半导体光电》
CAS
CSCD
北大核心
2004年第3期238-241,共4页
Semiconductor Optoelectronics
基金
国防科技大学基础研究项目(JC01-01-003)
关键词
光纤传感器
超磁致收缩薄膜
马赫一曾德尔干涉仪
磁探测
optical fibre sensor
giant magnetostrictive thin film
Mach-Zehnder interferometer
magnetic field detection
