Magnetic field sensing using polarization properties in magneto-optical fiber Bragg gratings

被引:2
|
作者
Su, Yang [1 ]
Zhu, Yong [1 ]
Li, Yuquan [1 ]
Yi, Xiaoxin [1 ]
机构
[1] PLA Univ Sci & Technol, Inst Commun Engn, Nanjing 210007, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
magneto-optical fiber Bragg gratings; Faraday effect; polarization properties; magnetic field sensing; OPTICAL-FIBER; SENSORS; STRAIN;
D O I
10.1117/1.3602881
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Fiber Bragg gratings have has been widely used in sensors. We analyze the transmission and polarization properties of magneto-optical fiber Bragg gratings based on coordinate conversion. The simulations demonstrate the influence of magnetic field intensity on the transmission spectrum, the polarization properties by the coupled mode theory, and the Jones formalism. The results show that while a small magnetic field can hardly be detected in the grating amplitude response, it leads to significant polarization properties such as the third normalized Stokes parameter, polarization dependent loss, and ellipticity. We demonstrate that these polarization properties contain information about the magnetic field and can thus be used for magnetic field sensing purposes. The sensitivity and dynamic range depend on the physical parameters of the grating. (C) 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.3602881]
引用
收藏
页数:6
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