Extremely high sensitivity magnetic field sensing based on birefringence-induced dispersion turning point characteristics of microfiber coupler

Min Yuan; Shengli Pu; Dihui Li; Yongxi Li; Zijian Hao; Yuxiu Zhang; Chencheng Zhang; Shaokang Yan

Results in Physics (Oct 2021)

Extremely high sensitivity magnetic field sensing based on birefringence-induced dispersion turning point characteristics of microfiber coupler

Min Yuan,
Shengli Pu,
Dihui Li,
Yongxi Li,
Zijian Hao,
Yuxiu Zhang,
Chencheng Zhang,
Shaokang Yan

Affiliations

Min Yuan: College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China
Shengli Pu: College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China; Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China; Corresponding author at: College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China.
Dihui Li: College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China
Yongxi Li: College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China
Zijian Hao: College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China
Yuxiu Zhang: College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China
Chencheng Zhang: College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China
Shaokang Yan: College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China

Journal volume & issue: Vol. 29
p. 104743

Abstract

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A kind of ultrasensitive magnetic field sensor based on microfiber coupler and magnetic fluid (MF) is proposed and investigated. As the working wavelength is near the birefringence-induced dispersion turning point (B-DTP), the sensitivity has been enhanced considerably and the maximum sensitivity can achieve −97.856 nm/mT. By tracking the B-DTP, the problem of high sensitivity but narrow detection range can be solved. The temperature sensitivity of the structure is 0.816 nm/℃. The proposed sensor has the advantages of extremely high sensitivity, which has the potential applications in high-precision magnetic field measurement.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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