| WANG Yan,TONG Zheng-rong,ZHANG Wei-hua,LUAN Pan-pan,ZHAO Yue,XUE Li-fang.Research on optical fiber magnetic field sensors based on multi-mode fiber and spherical structure[J].Optoelectronics Letters,2017,13(1):16-20 |
| Research on optical fiber magnetic field sensors based on multi-mode fiber and spherical structure |
| Author Name | Affiliation | | WANG Yan | Tianjin Key Laboratory of Film Electronic and Communication Devices, School of Computer and Communication Engineering, Tianjin University of Technology, Tianjin 300384, China | | TONG Zheng-rong | Tianjin Key Laboratory of Film Electronic and Communication Devices, School of Computer and Communication Engineering, Tianjin University of Technology, Tianjin 300384, China | | ZHANG Wei-hua | Tianjin Key Laboratory of Film Electronic and Communication Devices, School of Computer and Communication Engineering, Tianjin University of Technology, Tianjin 300384, China | | LUAN Pan-pan | Tianjin Key Laboratory of Film Electronic and Communication Devices, School of Computer and Communication Engineering, Tianjin University of Technology, Tianjin 300384, China | | ZHAO Yue | Tianjin Key Laboratory of Film Electronic and Communication Devices, School of Computer and Communication Engineering, Tianjin University of Technology, Tianjin 300384, China | | XUE Li-fang | Tianjin Key Laboratory of Film Electronic and Communication Devices, School of Computer and Communication Engineering, Tianjin University of Technology, Tianjin 300384, China |
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| Abstract: |
| A magnetic field sensor with a magnetic fluid (MF)-coated intermodal interferometer is proposed and experimentally demonstrated. The interferometer is formed by sandwiching a segment of single mode fiber (SMF) between a segment of multi-mode fiber (MMF) and a spherical structure. It can be considered as a cascade of the traditional SMF-MMF-SMF structure and MMF-SMF-sphere structure. The transmission spectral characteristics change with the variation of applied magnetic field. The experimental results exhibit that the magnetic field sensitivities for wavelength and transmission loss are 0.047 nm/mT and 0.215 dB/mT for the interference dip around 1 535.36 nm. For the interference dip around 1548.41nm, the sensitivities are 0.077 nm/mT and 0.243 dB/mT. Simultaneous measurement can be realized according to the different spectral responses. |
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