2760449-A1 is referenced by 2 patents and cites 5 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
FR19970003519 19970306
Publication Number
2760449 (A1)
Application Date
March 6, 1997
Publication Date
September 11, 1998
Inventor
Ripoche Pierre
Campion Jean Florent
Lumineau Yves
Gouez Benoit
Drouart Alain
Assignee
Alcatel Fibres Optiques
FR
IPC
C01B33/18
C01B 33/18
C03B37/018
C03B 37/018
C03C1/00
C03C 01/00
C03B37/018
C03B 37/018
C03B37/012
C03B 37/012
C03B20/00
C03B 20/00
C03B19/00
C03B 19/00
C01B33/00
C01B 33/00
G02B6/00
G02B 06/00
C03C1/02
C03C 01/02
C03B37/018
C03B 37/018
C03B37/012
C03B 37/012
C03B20/00
C03B 20/00
C03B19/01
C03B 19/01
C01B33/12
C01B 33/12
G02B6/00
G02B 06/00
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