公开(公告)号：GB2199320B

公开(公告)日：1988-12-21

申请号：GB8800641

申请日：1988-01-13

Applicant: STC PLC

Inventor： NEWBOULD RICHARD THOMAS ,  CHARLTON SUSAN JANE ,  WILSON STEPHEN JOHN

IPC: C03B37/029 ,  C03C25/22 ,  C03B37/018

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

Inventor： NEWBOULD RICHARD THOMAS ,  CHARLTON SUSAN JANE ,  WILSON STEPHEN JOHN

IPC: C03B37/029 ,  C03C25/22 ,  C03B37/018

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.