Simulation model of magneto-optic fiber Bragg gratings and its applications in Sagnac interferometers

Abstract

According to the symmetry of transmission matrix for non-uniform magneto-optic fiber Bragg gratings (MFBGs), the simulation model of the non-uniform MFBGs with bidirectional injection of light has been presented for the Optisystem software. The simulation model is verified by comparing with the Matlab numeric results using the piecewise-uniform MFBG model. As an example, the polarization-dependent loss (PDL) of an MFBG-based Sagnac interferometer (MSI) is analyzed in detail. Simulation results indicate that the magnetic field sensitivity of the MSI system can be improved by optimizing the coupling coefficient of the coupler, and the maximum of peak PDL is up to three times that of the single MFBG structure. The simulation model proposed in the paper is useful for the design of MFBG-based optical information devices.

Keywords

magneto-optic fiber Bragg grating (MFBG) / Optisystem simulation / polarization-dependent loss (PDL) / Sagnac interferometer (SI)

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Acknowledgements

This work was supported by the National High Technology Research and Development Program of China (No. 2009AA01Z216) and by Program for New Century Excellent Talents in University (NCET-08).

RIGHTS & PERMISSIONS

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg