Fiber-optic magnetic field sensor using magnetic fluid as the cladding

被引：43
|
作者：
Luo, Longfeng [1 ]
Pu, Shengli [1 ]
Dong, Shaohua [1 ]
Tang, Jiali [1 ]
机构：
[1] Univ Shanghai Sci & Technol, Coll Sci, Shanghai 200093, Peoples R China
来源：
SENSORS AND ACTUATORS A-PHYSICAL | 2015年 / 236卷
基金：
上海市自然科学基金;
关键词：
Magnetic fluid; Magnetic field sensing; Mode interference;
D O I：
10.1016/j.sna.2015.10.034
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A kind of fiber-optic magnetic field sensor is proposed. The sensing structure is composed of singlemode-multimode-singlemode fiber structure cascaded with core-offset fusion splicing between singlemode fibers. The sensing principle is based on the cladding mode interference. Experimental results indicate that, the magnetic field sensing sensitivities of 65.9 pm/Oe and 0.1185 dB/Oe are obtained for wavelength interrogation and intensity interrogation, respectively. The corresponding measurement range of magnetic field strength is 30-110 Oe. The response of temperature is also investigated. The corresponding temperature sensitivities for the interference dip around 1594 nm is obtained to be -42 pm/degrees C and -0.124 dB/degrees C. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：67 / 72
页数：6
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