Theoretical and experimental study of differential group delay and polarization dependent loss of Bragg gratings written in birefringent fiber |
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Authors: | Sébastien Bette Christophe Caucheteur Marc Wuilpart Patrice Mégret |
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Institution: | Faculté Polytechnique de Mons, Service d’Electromagnétisme et de Télécommunications, 31, Boulevard Dolez, B-7000 Mons, Belgium |
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Abstract: | In this paper, we completely study the wavelength dependency of differential group delay (DGD) and polarization dependent loss (PDL) for Bragg gratings written in birefringent fibers. Based on the coupled mode theory, we present analytical expressions for the evolution with wavelength of the transmission coefficient, the DGD and the PDL. The wavelength dependencies of these evolutions on the birefringence are then discussed. Experimental results are finally presented for an apodized FBG written in a bow-tie fiber. A very good agreement between theory and experience is reported, confirming the validity of the theoretical analysis. |
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Keywords: | Fiber Bragg grating Birefringence Birefringent fibers |
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