Laser & Optoelectronics Progress, Volume. 57, Issue 1, 010602(2020)
Characteristics of All-Optical-Fiber Magnetic Field Sensor Based on Magnetic Fluid Coating and Cooling Tapering
This paper proposes an all-optical-fiber high-precision magnetic field sensor based on magnetic fluid coating and cooling tapering to improve the sensitivity of optical fiber sensors in magnetic field detection and realizes high-precision real-time monitoring of field intensity under a weak magnetic field. The intermittent cooling method in the tapering process enhances the quality of the interference spectrum conveniently and slows the air-hole collapse of the photonic crystal fiber. Because of its simple manufacturing process, strong maneuverability, high sensitivity, and low degree of loss, the sensor realizes real-time online detection in a high-sensitivity magnetic field. Finally, the influence of the temperature variation of the sensor is discussed. Experimental results show that the photonic crystal fiber obtains a good interference spectrum at a tapering length of 5.5 mm and waist diameter of 75 μm. The sensor exhibits a highly linear response to external magnetic fields ranging from 0 to 78 Oe (1 Oe
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Chengcheng Wang, Ronghua Fan, Genzhu Wu, Baojin Peng, Feng Zhang. Characteristics of All-Optical-Fiber Magnetic Field Sensor Based on Magnetic Fluid Coating and Cooling Tapering[J]. Laser & Optoelectronics Progress, 2020, 57(1): 010602
Category: Fiber Optics and Optical Communications
Received: Jun. 18, 2019
Accepted: Jul. 1, 2019
Published Online: Jan. 3, 2020
The Author Email: Wu Genzhu (wugenzhu@zjnu.cn)