Spectral Characterization of Polarization Dependent Loss in Uniform Fiber Bragg Gratings in Reflection

We completely study the wavelength dependency of polarization dependent loss (PDL) for uniform fiber Bragg gratings (FBGs) written in single mode fibers (SMF). Effective PDL (PDL_eff) and simulations are carried out using the coupled mode theory and the Jones formalism. We analyze the evolution with wavelength of PDL_eff as a function of the grating parameters and the birefringence value. We demonstrate that the PDL_eff evolutions with wavelength can be strongly enhanced by a modification of the grating parameters. Our work brings a complete characterization of PDL_eff in FBGs and presents a good agreement between theory and experience.