Abstract
A single expression is presented for the power transmission coefficient of both step- and graded-index fibres, which is uniformly valid for all weakly tunnelling and refracting rays. Its accuracy is demonstrated in a comparison of the corresponding power attenuation coefficient for the step-index fibre with solutions to the electromagnetic boundary value problem.
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Love, J.D., Winkler, C. A universal tunnelling coefficient for step- and graded-index multimode fibres. Opt Quant Electron 10, 341–351 (1978). https://doi.org/10.1007/BF00620122
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DOI: https://doi.org/10.1007/BF00620122