Abstract

A novel temperature-compensated magnetic field sensor based on a ring erbium-doped fiber laser combined with a fiber Bragg grating (FBG) and a Sagnac loop containing a microfiber coupler (MFC) and magnetic fluid is proposed and investigated. Thanks to the dual-ring structure of the MFC-Sagnac loop and the FBG-assisted resonant cavity, the output of the structure has two distinct laser peaks. In addition to the magnetic field sensing capability, the proposed structure can simultaneously provide temperature information. The maximum experimentally demonstrated sensitivity to a magnetic field determined from the spectral shift of one laser peak is 102 pm/mT in the magnetic field range from 0 to 60 mT. The spectral position of the other laser peak is independent of the magnetic field but shifts toward longer wavelengths with temperature with a sensitivity of 18 pm/°C. The proposed magnetic field sensor is advantageous for applications requiring measurement accuracy over a wide magnetic field range with a compensating of temperature information.

© 2019 Optical Society of America

Temperature compensated magnetic field sensing using dual S-bend structured optical fiber modal interferometer cascaded with fiber Bragg grating

Zhiyong Zhao, Ming Tang, Feng Gao, Peng Zhang, Li Duan, Benpeng Zhu, Songnian Fu, Jun Ouyang, Huifeng Wei, Jinyan Li, Perry Ping Shum, and Deming Liu
Opt. Express 22(22) 27515-27523 (2014)

Magnetic field and temperature dual-parameter sensor based on magnetic fluid materials filled photonic crystal fiber

Ji Wang, Li Pei, Jianshuai Wang, Zuliang Ruan, Jingjing Zheng, Jing Li, and Tigang Ning
Opt. Express 28(2) 1456-1471 (2020)

Magnetic field measurement based on a fiber laser oscillation circuit merged with a polarization-maintaining fiber Sagnac interference structure

Jing Tian, Yiwu Zuo, Meijiang Hou, and Yang Jiang
Opt. Express 29(6) 8763-8769 (2021)

High-sensitivity optical fiber magnetic field sensor based on multimode optical fiber multi Fabry-Perot interference cavities

Yang Liu, Zhenlin Huang, Zhihao Wang, Yueming Zhang, Zhaokun Wang, Jie Dong, Jun Zhou, and Changyu Shen
Opt. Express 31(2) 1025-1033 (2023)

All-fiber-optic vector magnetic field sensor based on side-polished fiber and magnetic fluid

Yongxi Li, Shengli Pu, Yongliang Zhao, Rui Zhang, Zixuan Jia, Jilei Yao, Zijian Hao, Zhongxue Han, Dihui Li, and Xinjie Li
Opt. Express 27(24) 35182-35188 (2019)