Design and research of magnetic field sensor based on grapefruit optical fiber filled with magnetic fluid  

作　　者：WANG Mengye JIN Wa LIU Xuejing SUN Wenjie ZHANG Chenhui BI Weihong 

机构地区：[1]College of Information Science and Engineering,Yanshan University,Qinhuangdao,066000,China [2]The Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province,Qinhuangdao,066000,China [3]College of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai,200093,China

出　　处：《Optoelectronics Letters》2022年第5期269-275,共7页光电子快报（英文版）

基　　金：supported by the National Key R&D Program of China (No.2019YFC1407900);the National Natural Science Foundation of China (No.62005167)

摘　　要：A novel magnetic field sensor was proposed based on the grapefruit optical fiber with the magnetic fluid injected into the six air holes.The sensor utilizes the Mach-Zehnder interference(MZI).The light is transmitted through the single-mode fiber to the fusion splice point and is divided into two parts.When the light passes through the cladding air hole with magnetic fluid,it interferes with the core light,and the change of the interference light is related with the change of the magnetic field.The sensor cavity length is 6 cm.It can be obtained from the experimental results that the magnetic field sensitivity reaches up to 2.243 nm/Oe with the range from 0 to 2.28 Oe.The sensor has the advantages of easy fabrication,easy installation and low cost.The findings provide new ideas for the study of ocean wind electromagnetic fields.

关 键 词：FIBER OPTICAL MAGNETIC 

分 类 号：TP212.13[自动化与计算机技术—检测技术与自动化装置]