期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 34, 期 23, 页码 1308-1310出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2022.3214105
关键词
Optical interferometry; Temperature sensors; Magnetic heads; Temperature measurement; Optical fibers; Optical fiber sensors; Optical variables measurement; Current sensor; fibre optic; magneto-optic; channelled-spectrum; TGG
资金
- Foundation for Science and Technology (FCT), Portugal [2020.04562]
- BD
The fiber optic current sensor demonstrated in this study utilizes the intrinsic temperature and wavelength dependence of the Verdet constant of a terbium gallium garnet (TGG) magneto-optic material and two micro-optic linear polarizers to simultaneously measure temperature and optical Faraday rotation, without requiring additional optical components.
The fibre optic current sensor demonstrated here uses the intrinsic temperature and wavelength dependence of the Verdet constant of a terbium gallium garnet (TGG) magneto-optic material and the two micro-optic linear polarizers attached, to simultaneously extract the values of temperature and the optical Faraday rotation (induced by the presence of the magnetic field due an electric current on a conductor) without any extra optical component attached to the optical sensor head. The simultaneous measurement is achieved by illuminating the sensor head with a broadband optical source and by careful signal processing of the originated channelled-spectrum, compensate the sensor's temperature dependence.
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