Magnetic field sensor utilizing bent fiber taper and magnetic fluid

Jie Li; Zhuang Tian; Li-Peng Sun; Bai-Ou Guan

doi:10.1117/12.2059499

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2 June 2014 Magnetic field sensor utilizing bent fiber taper and magnetic fluid

Jie Li, Zhuang Tian, Li-Peng Sun, Bai-Ou Guan

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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91579G (2014) https://doi.org/10.1117/12.2059499
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

A magnetic field sensor is demonstrated by placing a bent-fiber taper modal interferometer inside a magnetic fluid sealed with an organic glass base. Owing to the strong refractive index dependency of the interferometer and magneto-optics property of the fluid, our sensor exhibits high sensitivity to the external magnetic field change. A linear wavelength dependency of ~58pm/Oe is experimentally obtained within a magnetic field range from 30 to 80 Oe. Our structure is featured of high sensitivity, fiber-compatibility, compactness, and robustness.

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Jie Li, Zhuang Tian, Li-Peng Sun, and Bai-Ou Guan "Magnetic field sensor utilizing bent fiber taper and magnetic fluid", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91579G (2 June 2014); https://doi.org/10.1117/12.2059499

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