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Loss calculations in weakly-guiding optical dielectric waveguides

Adams, M.J. (1977) Loss calculations in weakly-guiding optical dielectric waveguides Optics Communications, 23, (1), pp. 105-108. (doi:10.1016/0030-4018(77)90136-5).

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The application of perturbation theory to a three-layer weakly-guiding slab waveguide composed of lossy dielectric media yields a simple formula for the attenuation coefficient alpha of a guided mode: alpha = (Sigma^3(i=1) alpha(i) P(i)) / (Sigma^3(i=1) P(i)), where alpha(i), P(i) are respectively the loss coefficient and model power in region i (i = 1,2,3). It is shown that this result can also be obtained from arguments based purely on geometric optics. The result is easily extended to apply to circularly-symmetric optical fibres where it yields confirmation of an earlier approximation for the power ratios P(i)/Sigma^2(i=1)P(i)

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Published date: 1977


Local EPrints ID: 78725
ISSN: 0030-4018
PURE UUID: 339f2ec7-41b9-40d2-9883-bf832c66cf17

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:22

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Author: M.J. Adams

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