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Novel magnetic field sensor based on magnetic fluids infiltrated dual-core photonic crystal fibers |
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| Affiliation: | 1. Division of Hematology, Brigham and Women''s Hospital, Harvard Medical School, Mid-Campus 3, 75 Francis Street, Boston, MA 02115, USA;2. Dana Farber Cancer Institue, Boston, MA, USA;1. Institute of Information Optics, Zhejiang Normal University, Jinhua 321004, China;2. Joint Research Laboratory of Optics of Zhejiang Normal University and Zhejiang University, Hangzhou 310058, China;1. Northeastern University, College of Information Science and Engineering, Shenyang 110004, China;2. Key Laboratory of Integrated Automation of Process Industry, Ministry of Education, China;3. Shenyang Institute of Engineering, Shenyang 110136, China;1. School of Information and Control Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China;2. Xuzhou Key Laboratory of Artificial Intelligence and Big Data, Xuzhou, Jiangsu, 221116, China |
| Abstract: | Novel magnetic field sensor based on magnetic fluids infiltrated dual-core Photonic Crystal Fibers (PCFs) is proposed in this paper. Inside the cross-section of the designed PCFs, the two fiber cores filled with magnetic fluids (Fe3O4) are separated by an air hole, and then form two independent waveguides with mode coupling. The mode coupling under different magnetic field strength is investigated theoretically. A novel and simple magnetic field sensing system is proposed and its sensing performances have been studied numerically. The results show that the magnetic field sensor with 15-cm PCFs has a large sensing range and high sensitivity of 4.80 pm/Oe. It provides a new feasible method to design PCF-based magnetic field sensor. |
| Keywords: | Photonic crystal fibers Magnetic field sensor Dual-core Mode coupling Magnetic fluids infiltrated |
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