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Optical Fibre Magnetic Field/Current Sensors with TbDyFe-FeNi Multilayer as Sensing Materials

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Abstract:

In this paper, a fiber-optic magnetic/current sensor using magnetostrictive TbDyFe/FeNi multilayer was proposed and characterized. By magnetron sputtering process, TbDyFe/FeNi thin films were deposited on etched side circle of a fiber Bragg Grating (FBG) as sensing element. There exists 40 pm change of FBG wavelength when magnet field increase up to 3000 mA. The response to magnetic/current field is reversible, and could be applicable for magnetic and current sensing.

Keywords: MAGNETIC SENSOR; MAGNETOSTRICTIVE MATERIAL; OPTICAL FIBER

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/sl.2009.1112

Publication date: August 1, 2009

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