Optical fiber magnetic field sensors with TbDyFe magnetostrictive thin films as sensing materials

作者：Minghong Yang, Jixiang Dai, Ciming Zhou, Desheng Jiang · 发表于：Optics Express · 年份：2009 · DOI：10.1364/oe.17.020777 · 被引用次数：199 · 研究领域：Advanced Fiber Optic Sensors、Magneto-Optical Properties and Applications、Photonic and Optical Devices

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.