High sensitivity magnetic field sensor based on hybrid fiber interferometer

被引：11
|
作者：
Xu, Jian [1 ]
Tang, Xiaojun [2 ]
Xin, Liang [2 ]
Sun, Zijie [2 ]
Ning, Tigang [1 ]
机构：
[1] Beijing Jiaotong Univ, Inst Lightwave Technol, Key Lab All Opt Network & Adv Telecommun Network, Minist Educ, Beijing 100044, Peoples R China
[2] China Acad Space Technol, Beijing Spacecrafts, Beijing 100094, Peoples R China
来源：
OPTICAL FIBER TECHNOLOGY | 2023年 / 78卷
关键词：
Optical fiber sensor; Optical fiber interferometer; Magnetic field; FABRY-PEROT-INTERFEROMETER; STRAIN;
D O I：
10.1016/j.yofte.2023.103321
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper presents and demonstrates an ultra-sensitive magnetic field sensor using a hybrid interferometer. The sensor is created by combining a Sagnac loop interferometer (SI) and a Fabry-Perot interferometer (FPI). The difference in the free spectrum ranges of the two cavities generates a Vernier effect, which amplifies the sensitivity. Experimental results indicate that the sensitivity of the single FP cavity is 25 pm/mT, while the sensitivity of the hybrid sensor is 811.53 pm/mT, which is about 32 times higher than that of a single individual FPI. The sensor can be applied in harsh environment such as mine, oil well and other fields.
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页数：5
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