Optical fibres
    8.
    发明专利

    公开(公告)号:GB2199320A

    公开(公告)日:1988-07-06

    申请号:GB8800641

    申请日:1988-01-13

    Applicant: STC PLC

    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 comprises direct nitridation. This may be achieved by adding a nitriding atmosphere to the drawing furnace gases, or to the reactive gases (TiCl4 and SiCl4) 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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