Analysis of polarization states in magneto-optic fiber Bragg gratings based on a nonmagnetic equivalent model

Baojian Wu; Xiaojing Zhou; Kun Qui

doi:10.1117/1.3484951

1 September 2010 Analysis of polarization states in magneto-optic fiber Bragg gratings based on a nonmagnetic equivalent model

Baojian Wu, Xiaojing Zhou, Kun Qui

Author Affiliations +

Optical Engineering, Vol. 49, Issue 9, 094401 (September 2010). https://doi.org/10.1117/1.3484951

Abstract

According to the magneto-optic coupling characteristics of magneto-optic fiber Bragg gratings (MFBGs), we present a nonmagnetic equivalent model of a uniformly magnetized MFBG to analyze the optical polarization states output from the MFBG for incident linearly polarized light. The Faraday rotation of transmitted light is enhanced at the edges of a grating bandgap, and then can be applied to the measurement of a magnetic field by employing the wavelength speeding method. The use of apodized MFBGs helps to simultaneously achieve a good linear magnetic field response and extremely small fluctuation of transmittivity. For a typical paramagnetic terbium-doped and apodized MFBG, the temperature coefficient of the Faraday rotation is calculated to be −2.5×10−4 m/K.

©(2010) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Baojian Wu, Xiaojing Zhou, and Kun Qui "Analysis of polarization states in magneto-optic fiber Bragg gratings based on a nonmagnetic equivalent model," Optical Engineering 49(9), 094401 (1 September 2010). https://doi.org/10.1117/1.3484951

Published: 1 September 2010

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