Temperature-Insensitive Magnetic Field Sensor Based on Nanoparticle Magnetic Fluid and Photonic Crystal Fiber
Peng Zu(Nanyang Technological University), Chi Chiu Chan(Nanyang Technological University), Wen Siang Lew(Nanyang Technological University), Limin Hu(China Jiliang University), Yongxing Jin(China Jiliang University), Hwi Fen Liew(Nanyang Technological University), Li Han Chen(Nanyang Technological University), Wei Chang Wong(Nanyang Technological University), Xinyong Dong(China Jiliang University)
Cited by 149Open Access
Abstract
A novel magnetic field sensor based on the magnetic fluid and Mach-Zehnder interferometer is proposed. The sensor takes advantage of the tunable refractive index property of the magnetic fluid and the modal interference property of the collapsed photonic crystal fiber. The achieved sensitivity and resolution of the sensor are 2.367 pm/Oe and 4.22 Oe, respectively. The magnetic field sensor is insensitive to the temperature variation with a temperature coefficient of 3.2 pm/°C.
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