Method of manufacturing silicon optical fiber having a compressive surface layer
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United States of America Patent
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Apr 7, 1992
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app pub date -
Jan 22, 1988
filing date -
Sep 29, 1984
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Abstract
In order to eliminate the effect of water attack on silica optical fibres, the fibres are provided with a surface layer of silicon nitride or silicon oxynitride. The method proposed includes direct nitridation. This may be achieved by adding a nitriding atmosphere to the drawing furnace gases, or to the reactive gases (TiCl.sub.4 and SiCl.sub.4) incorporated in the flame of an oxyhydrogen torch for the formation of a compressive silica/titania layer on an optical fibre by a glass soot deposition and sintering process.
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