Melt coating of tin on silica optical fiber

H. S. Seo, U. C. Paek, K. Oh, C. R. Kurkjian

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Abstract

The coating of a silica optical fiber with molten tin metal is analyzed rigorously by developing a numerical method based on two- and three-dimensional (2- and 3-D) conduction models. In the analysis, the axial temperature distribution in both the fiber and coating is obtained in terms of the depth of the melt and the fiber draw speed. A coating applicator has been designed for tin (Sn) coating and fibers with a coating thickness from 5 to 20 μm were fabricated with draw speeds ranging from 50-150 cm/s. The numerical model was found to be in agreement with the experimentally obtained results for various coating conditions and fiber drawing parameters. It is shown that for tin, a low-melting-point metal, the freezing takes place primarily within the coating applicator. As a result of the presence of this "subcoating," additional coating occurs as the fiber leaves the applicator. Since this tin coating is hermetic, a mean failure strength of 8 GPa is measured for these tin-coated fibers by the two-point bending technique rather than the 5.5 GPa normally found for polymer-coated fibers.

Original languageEnglish
Pages (from-to)2355-2364
Number of pages10
JournalJournal of Lightwave Technology
Volume16
Issue number12
DOIs
Publication statusPublished - 1998 Dec 1

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All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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