Journal
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
Volume 71, Issue -, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIM.2022.3178501
Keywords
Magnetic fields; Temperature measurement; Temperature sensors; Optical fiber sensors; Sensitivity; Interference; Magnetic field measurement; Exposed core fiber (ECF); fiber-optic interferometer; magnetic field; magnetic fluid (MF); temperature
Funding
- National Natural Science Foundation of China [61903073]
- China Postdoctoral Science Foundation
- Fundamental Research Funds for the Central Universities [N2204013]
- Natural Science Foundation of Hebei Province [F2020501040]
- Australian Research Council Future Fellowship [FT200100154]
- Optofab node of the Australian National Fabrication Facility utilizing Commonwealth and South Australian State Government Funding
- Australian Research Council [FT200100154] Funding Source: Australian Research Council
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A temperature compensated magnetic field sensor using exposed core fiber filled with magnetic fluid is proposed to detect magnetic field strength and temperature simultaneously. The sensor shows good response to MFT and is suitable for industrial flaw detection, aerospace, and medical applications.
A temperature compensated magnetic field sensor using magnetic fluid (MF) filled exposed core fiber (ECF) has been proposed to detect magnetic field strength and temperature (MFT) simultaneously in this article. The designed sensor was formed by splicing an ECF between two sections of single-mode fibers (SMFs), in which the ECF's exposed side was filled with MF. ECF is a multimode fiber that supports multiple modes of light transmitting and produces mode interference in the core. Different order modes of light excited in the ECF have individual sensitivities to MFT. Therefore, interference spectra of two different pair modes can be monitored to measure MFT simultaneously. The results show that the sensor responds well to MFT. The maximum MFT sensitivities are -0.18 nm/mT and -0.16 nm/lpzrptcircC. The limit of detections (LOD) of MFT is 1.7 mT and 1.9 lpzrptcircC. The sensor is particularly suitable for simultaneous detection of MFT in narrow spaces, such as industrial flaw detection, aerospace, and medical applications.
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