Abstract
This paper presents a theoretical investigation of the propagation and focusing of an electromagnetic wave in an inhomogeneous dielectric whose dielectric constant is given byɛ=ɛ0(z)+Φ(r, z), whereZ-axis is the direction of propagation of the beam. The quantity Φ(r, z) may either be due to non-linear effects or due to inhomogeneity in the actual fabrication of the guide.
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