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Leaky-Ray Attenuation in Optical Fibers

Leaky-ray attenuation is relatively insensitive to variations in fiber index profile. In this paper, fiber profiles are idealized as either step-index or parabolic-index, allowing analytical solutions for certain integrals, by which attenuation coefficients may easily be evaluated. These are combined with previously developed theory in a unified presentation which, to facilitate use in raytracing investigations, is formulated in terms of Cartesian coordinates and ray vectors.