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The coupling between guided optical waves in magneto-optic fiber Bragg gratings(MFBGs) with linear birefringence is investigated using the eigen-mode and coupled-mode approaches.The relationship between the polarization-dependent loss(PDL) and the eigen states of polarization(SOPs) in the MFBGs is discussed.Only the MFBGs with low linear birefringence are applied to the peak PDL-based magnetic field measurement,after which the linear dynamic range is determined using the relative magnitude of linear and magnetically induced circular birefringence.In this letter,a theoretical model is presented to explain the experimental results and help develop novel MFBG-based devices.
The coupling between guided optical waves in magneto-optic fiber Bragg gratings (MFBGs) with linear birefringence is investigated using the eigen-mode and coupled-mode approaches. The relationship between the polarization-dependent loss (PDL) and the eigen states of polarization SOPs) in the MFBGs is discussed. Of the MFBGs with low linear birefringence are applied to the peak PDL-based magnetic field measurement, after which the linear dynamic range is determined using the relative magnitude of linear and magnetically induced circular birefringence. In this letter , a theoretical model is presented to explain the experimental results and help develop novel MFBG-based devices.