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High-Sensitivity MF Filled Photonic Crystal Fiber Magnetic Field Sensor Based on Sagnac Interferometer

A high sensitivity photonic crystal fiber (PCF) magnetic field sensor based on Sagnac interferometer is proposed. All the air holes of the PCF are completely filled with the magnetic fluid (MF), which is a magnetic liquid material. The sensing performance of PCF is simulated and analyzed by using fi...

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Bibliographic Details
Published in:Journal of superconductivity and novel magnetism 2024-10, Vol.37 (8-10), p.1411-1419
Main Authors: Fan, Zhenkai, Liu, Haishan, Chen, Hailiang, Chu, Shichao, Li, Shuguang, Zhang, Yinping
Format: Article
Language:English
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Summary:A high sensitivity photonic crystal fiber (PCF) magnetic field sensor based on Sagnac interferometer is proposed. All the air holes of the PCF are completely filled with the magnetic fluid (MF), which is a magnetic liquid material. The sensing performance of PCF is simulated and analyzed by using finite element method (FEM). It is found that the effects of wavelength λ , phase birefringence B ( λ , H ), and group birefringence B g ( λ , H ) on the sensitivity are very significant. The two dip points in this spectrum show a red shift and a blue shift as the refractive index of the magnetic fluid increases, respectively. This magnetic field sensor obtains the average sensitivity of 889.5 pm/Oe (111,684.9 nm/RIU) and −994.3 pm/Oe (−124,839.5 nm/RIU) in the range from 90 to 240 Oe.
ISSN:1557-1939
1557-1947
DOI:10.1007/s10948-024-06761-2