The theory of unbound modes on circular dielectric waveguides
The electromagnetic field propagating along an ideal dielectric waveguide may contain both bound and unbound (radiation) components. In a transverse spectral representation, the bound field is represented by a finite sum of discrete modes but the unbound field requires integration over a continuum of modes. This integration, while it provides an exact description of the radiation field, can be very slowly convergent. An asymptotic representation using improper (leaky) modes is more rapidly...[Show more]
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