Open AccessOptical fiber magnetic field sensors with TbDyFe magnetostrictive thin films as sensing materials
Author(s) -
Minghong Yang,
Jixiang Dai,
Ciming Zhou,
Desheng Jiang
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.020777
Subject(s) - magnetostriction , materials science , fiber bragg grating , optics , thin film , optical fiber , magnetic field , magnet , sputter deposition , optoelectronics , fiber optic sensor , wavelength , sputtering , fiber , composite material , nanotechnology , electrical engineering , physics , engineering , quantum mechanics
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.