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

Figure 4

The blue and the green solid lines are plots of function for given pairs of and of the fundamental mode. The unique exact solution of the inverse spectral problem is marked by the red circle. The approximate solution obtained by the spline-collocation method coincides with the red circle for the exact . For randomly noised , approximate solutions are intersections of dashed lines. They belong to the red rhomb.