Abstract
We perform an analytical and numerical analysis of the influence of wavelength dependence of birefringence (WDB) during nonlinear pulse propagation through fiber optics. We find a set of coupled nonlinear equations, which allows for the study of the WDB in fibers. For the first time, to the best of our knowledge, the concept of cross-dispersion birefringence (CDB) is introduced to show what makes spectral pulse evolution broaden faster than usual. Some linear and nonlinear phenomena are analyzed, such as polarization trajectories, four-wave mixing, and supercontinuum (SC) generation. We show that the WDB changes the polarization states dramatically and Stokes and anti-Stokes waves linearly move toward longer and shorter wavelengths, respectively. Finally, we demonstrate that CDB has the capability to generate SC with immunity to the initial polarization angle.
© 2015 Optical Society of America
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