Abstract
Guided modes in a dielectric waveguide structure with a coaxial periodic
multi-layer are investigated by using a matrix formula with Bessel functions. We
show that guided modes exist in the structure, and that the field is confined in
the core which consists of the optically thinner medium. The dispersion curves
are discontinuous, so that the modes can exist only in particular wavelength
bands corresponding to the stop bands of the periodic structure of the clad. It
is possible that the waveguide structure can be applied to filters or optical
fibers to reduce nonlinear effects.
©2000 Optical Society of America
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