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Updated: Jun 17, 2026

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
Published on: September 30, 2019
Optical fiber magnetic field sensors with TbDyFe magnetostrictive thin films as sensing materials
Minghong Yang1, Jixiang Dai, Ciming Zhou
1National Engineering Laboratory for Optical Fiber Sensors, Wuhan University of Technology, Luoshi Street 122, Wuhan, China. minghong.yang@whut.edu.cn
Abstract:
Different from usually-used bulk magnetostrictive materials, magnetostrictive TbDyFe thin films were firstly proposed as sensing materials for fiber-optic magnetic field sensing characterization. By magnetron sputtering process, TbDyFe thin films were deposited on etched side circle of a fiber Bragg Grating (FBG) as sensing element. There exists more than 45pm change of FBG wavelength when magnet field increase up to 50 mT. The response to magnetic field is reversible, and could be applicable for magnetic and current sensing.
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