Abstract
We present the numerical design of an input polarization-independent nonlinear optical fiber-loop mirror with elliptical birefringence. We found real physical parameters of circular and linear induced-birefringences to eliminate the input polarization dependence of the nonlinear polarization rotation effect caused by self-phase and cross-phase modulation. To show the input polarization independency, we present the results for a nonlinear optical fiber-loop mirror which includes a 65/35 coupler, and a 70-m fiber loop with 0.75 turns per meter twist ratio, and 5 cm bend radii. The nonlinear optical fiber-loop mirror presents less than 40 dB transmission polarization dependency. The numerical model was made by the transfer matrix method and solved by the split-step Fourier method. The results of this numerical design have multiple potential applications such as mode-locking pulsed lasers, and optical communications, among others.
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