Study and Simulation of Nonlinear effects in Bire-Fringent Fibers Using Efficient Numerical Algorithm

Pulse propagation in a birefringent medium carries due weightage and importance in passive modelocking of fiber lasers. We have carried out study of nonlinear effects in birefringent medium by simulating pulse propagation using adaptive step size method, which is globally an efficient algorithm for solving Schrodinger type equations using split step Fourier method. Nonlinear optical loop mirror was realized and it was revealed that the results can be used in forming a figure of eight fiber laser using NOLM, where NOLM behaves like a fast saturable absorber. Novelty lies in producing accurate results using adaptive step size method.