摘要
为了实现磁场和温度的同时测量,实验制作了基于球形-细芯-球形传感结构的马赫-曾德尔干涉仪。采用将磁流体作为外环境包覆传感结构的方法,进行了双参量的传感研究。外界磁场和温度改变时,磁流体的折射率有规律地变化,可以同时测量磁场和温度,但因消光比差,故在此基础上改良设计了一种球形-多模-细芯-球形传感结构。结果表明,单峰解调方式得到的球形-细芯-球形传感结构的磁场和温度灵敏度分别为-0.0967 nm/mT和0.0667 nm/℃;改良之后的球形-多模-细芯-球形结构干涉效果好,且磁场和温度灵敏度分别为0.1267 nm/mT和-0.1213 nm/℃,具有低成本、高灵敏度、抗噪、应用性好等特点。该研究可为磁场和温度双参量传感设计提供参考。
In order to realize the simultaneous measurement of magnetic field and temperature,a Mach-Zehnder interferometer based on sphere-thin core fiber-sphere sensing structure was fabricated.The double parameter sensing was studied by using magnetic fluid as the sensing structure external environment.When the external magnetic field and temperature change,the refractive index of magnetic fluid changes regularly,and the magnetic field and temperature can be measured at the same time.But the extinction ratio of the structure is poor,so a spherical-multi mode fiber-thin core fiber-sphere sensor structure is improved.The results show that the magnetic field and temperature sensitivity of the sphere-thin core fiber-sphere sensing structure obtained by single-peak demodulation are-0.0967 nm/mT and 0.0667 nm/℃,respectively.The improved spheremulti mode fiber-thin core fiber-sphere structure has a good interference effect,and the magnetic field and temperature sensitivity are 0.1267 nm/mT and-0.1213 nm/℃,respectively.It has the characteristics of low cost,high sensitivity,noise resistance and good application.The research can provide reference for the design of magnetic field and temperature double parameter sensor.
作者
刘婷
温芳芳
张静
李永倩
LIU Ting;WEN Fangfang;ZHANG Jing;LI Yongqian(Department of Electronic and Communication Engineering,North China Electric Power University,Baoding 071003,China;Hebei Key Laboratory of Power Internet of Things Technology,North China Electric Power University,Baoding 071003,China;Baoding Key Laboratory of Optical Fiber Sensing and Optical Communication Technology,North China Electric Power University,Baoding 071003,China)
出处
《激光技术》
CAS
CSCD
北大核心
2023年第4期520-526,共7页
Laser Technology
基金
国家自然科学基金资助项目(61775057,62171185,52177141)
河北省自然科学基金资助项目(F2019502112)
中央高校基本科研业务费专项基金资助项目(2019MS086,2021MS071)。
关键词
光纤光学
光纤传感
磁流体
双参量测量
fiber optics
optical fiber sensing
magnetic fluids
two-parameter measurement
