| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5449466 | Optics Communications | 2017 | 4 Pages |
Abstract
A temperature-independent fibre-optic magnetic-field sensor is proposed and demonstrated experimentally. The device consists of a thin-core fibre (TCF) sandwiched in the upstream of a fibre Bragg grating (FBG). Because of the core-mismatch between the TCF and the single-mode fibre (SMF), the core mode is coupled to the cladding modes within the TCF cladding, and parts of them are recoupled back to the leading-in SMF by the downstream FBG. The cladding modes are sensitive to the ambient refractive index (RI), and therefore have the ability to respond to a RI change in the magnetic fluid determined by the ambient magnetic field. The intensities of the cladding-mode resonances are highly sensitive to the magnetic field change, while, in contrast, the resonance wavelengths always remain unchanged. This property can allow the sensor to act as a power-referenced reflection probe for magnetic field measurements.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Qin Tian, Zhongyao Feng, Qiangzhou Rong, Yun Wan, Xueguang Qiao, Manli Hu, Hangzhou Yang, Ruohui Wang, Zhihua Shao, Tingting Yang,