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https://hdl.handle.net/2440/135468
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Type: | Journal article |
Title: | Temperature compensated fiber optic magnetic sensor based on the combination interference principle. |
Author: | Yu, Q. Li, X. Zhou, X. Gao, X. Lv, R. Nguyen, L.V. Warren-Smith, S.C. Zhao, Y. |
Citation: | Optics Letters, 2022; 47(10):2558-2561 |
Publisher: | Optica Publishing Group |
Issue Date: | 2022 |
ISSN: | 0146-9592 1539-4794 |
Statement of Responsibility: | Qi Yu, Xuegang Li, Xue Zhou, Xinjie Gao, Riqing Lv, Linh V. Nguyen, Stephen C. Warren-Smith, and Yong Zhao |
Abstract: | In this paper, a highly sensitive temperature compensated fiber optic magnetic field sensor by Sagnac and Mach-Zehnder combination interference (SMZI) is proposed and verified. The sensing structure relies on microstructured exposed core fiber (ECF) filled with ethanol and magnetic fluid (MF). The refractive index of MF and ethanol is affected by the magnetic field and temperature (MFT). SMZI is based on the multimode and birefringence characteristics of ECF. The measurement principle is that the spectra of Sagnac interference and Mach-Zehnder interference have respective sensitivities to the MFT. The magnetic sensitivity can reach 1.17 nm/mT, and the temperature sensitivity is up to -1.93 nm/°C. At the same time, the sensor has good repeatability and low detection limits of 0.41 mT and 0.25°C, respectively. It not only solves the cross-influence of temperature but also makes the spectral analysis more intuitive. The sensor has a broad development prospect in the application of MFT detection. |
Rights: | ©2022 Optica Publishing Group |
DOI: | 10.1364/ol.456552 |
Grant ID: | http://purl.org/au-research/grants/arc/FT200100154 |
Published version: | http://dx.doi.org/10.1364/ol.456552 |
Appears in Collections: | Earth and Environmental Sciences publications |
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