Reconstruction of Dielectric Constants of Core and Cladding of Optical Fibers Using Propagation Constants Measurements

Figure 2

The plot of the dispersion curves computed by the spline-collocation method for surface eigenmodes in a weakly guiding dielectric waveguide of the circular cross-section. The exact solutions are plotted by solid lines. The solution for the fundamental mode is plotted by the lower red solid line. Numerical solutions of the residual inverse iteration method are marked by red crosses. Initial approximations for SVDs are marked by blue circles.