Magnetic field sensor based on anti-resonant reflecting guidance in the magnetic gel-coated hollow core fiber

被引:56
作者
Gao, R. [1 ]
Jiang, Y. [1 ]
Zhao, Yang [2 ]
机构
[1] Beijing Inst Technol, Sch Optoelect, Beijing 100081, Peoples R China
[2] Laser Inst Shandong Acad Sci, Jinan 250014, Peoples R China
关键词
FERROFLUID;
D O I
10.1364/OL.39.006293
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A compact all-fiber magnetic field sensor based on the magnetic gel coated hollow core fiber (HCF) has been proposed and experimentally demonstrated. A double-layered Fabry-Perot resonator is formed by coating a magnetic gel layer on the surface of the HCF. Anti-resonant reflecting guidance of light can be achieved in the HCF, and leaky mode is induced at resonant wavelength of the double-layered Fabry-Perot resonator, which results in lossy dips in the transmission spectrum of the HCF. Due to the tunable magneto-elastic effect, the shape of the magnetic gel is deformed with the external magnetic field, which results in a change of the resonate condition for the double-layered Fabry-Perot resonator. The magnetic field can be measured by interrogating the wavelength of the lossy dip. The experimental results show that a magnetic field sensitivity of 245 pm/Oe is achieved. (C) 2014 Optical Society of America
引用
收藏
页码:6293 / 6296
页数:4
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