Comparative assessment of methods for the analysis of open dielectric waveguides with arbitrary cross section

Comparative assessment of methods for the analysis of open dielectric waveguides is presented. It is noted that only in the case of open dielectric waveguides with cylindrical coaxial layers formulation of the boundary value problem in closed form is possible. It is shown that the spectral method, which uses the autonomous decomposition of the components of the field, allows for a rigorous calculation of the open dielectric waveguides of any cross section.