Influence of initial dopant distribution in fiber core on refractive index distribution of thermally expanded core fibers

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Original languageEnglish
Pages (from-to)1427-1431
Journal / PublicationOptical Materials
Issue number9
Publication statusPublished - May 2008


We investigate the process of dopant diffusion of a thermally expanded core fiber by solving the corresponding diffusion equation using the explicit finite-difference method. We compare our numerical solution with analytical solution of diffusion equation for two different initial dopant concentrations in the core. The conclusions reached provide a guideline for the accurate modeling of dopant diffusion of thermally expanded core fibers, which is important for the prediction of the mode field enlargement. © 2007 Elsevier B.V. All rights reserved.

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  • 42.81.-i, 66.30.-h