0863108-A1 is referenced by 9 patents and cites 7 patents.

A natural or synthetic silica purification method involves supplying a plasma or flame (4) with silica grains (11) from a first feed pipe (9) and with a chlorinated or preferably fluorinated compound in a carrier gas (15) from a second feed pipe (13), the feed conditions of the two pipes (9, 13) being regulated to effect reaction of alkali or alkaline earth metals in the silica (11) with the chlorine or preferably fluorine in the compound. Also claimed is a process for natural or synthetic silica deposition on an optical fibre preform by rotating the preform (1) in front of a plasma or flame (4) from a reciprocating torch or burner (3) operated by the above method.

Title
Process for purifying natural or synthetic silica and depositing purified silica on an optical fibre preform
Application Number
EP19980400483 19980302
Publication Number
0863108 (A1)
Application Date
March 2, 1998
Publication Date
September 9, 1998
Inventor
Campion Jean Florent
FR
Ripoche Pierre
FR
Lumineau Yves
FR
Gouez Benoit
FR
Drouart Alain
FR
Assignee
Alsthom Cge Alcatel
FR
IPC
C03C 01/02
C03B 37/012
C03B 19/01
C01B 33/12
C03C 01/00
C03B 37/018
C03B 37/012
C03B 20/00
C03B 19/00
C01B 33/00
G02B 06/00
C03C 01/02
C03B 37/018
C03B 37/012
C03B 20/00
C03B 19/01
C01B 33/12
G02B 06/00
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