1 September 2010 Analysis of polarization states in magneto-optic fiber Bragg gratings based on a nonmagnetic equivalent model
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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)
Baojian Wu, Baojian Wu, Xiaojing Zhou, Xiaojing Zhou, Kun Qui, 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 . Submission:
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