| Abstract: | For a planar three-layer guiding fiber and a guiding W-fiber, comparative analysis of the characteristics of leaking modes
is performed on the basis of numerical solution of the dispersion equation. It is shown that the complex plane distributions
of solutions to the dispersion equation for the transverse wave numbers of leaking modes substantially depend on the geometrical
and optical parameters of such structures. In particular, it is found out that a guiding W-fiber with a large step in the
refractive index ensures the most effective filtering of leaking modes and the highest concentration of the guided mode field. |
