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Optical Engineering

Magnetic field sensing using polarization properties in magneto-optical fiber Bragg gratings
Author(s): Yang Su; Yong Zhu; Yuquan Li; Xiaoxin Yi
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Paper Abstract

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.

Paper Details

Date Published: 1 July 2011
PDF: 7 pages
Opt. Eng. 50(7) 074401 doi: 10.1117/1.3602881
Published in: Optical Engineering Volume 50, Issue 7
Show Author Affiliations
Yang Su, The PLA Univ. of Science and Technology (China)
Yong Zhu, The PLA Univ. of Science and Technology (China)
Yuquan Li, The PLA Univ. of Science and Technology (China)
Xiaoxin Yi, The PLA Univ. of Science and Technology (China)

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