06269663 is referenced by 32 patents and cites 20 patents.

The deposit of natural or synthetic silica comprises a preform (

1

) set into rotation (

7

) in front of a plasma torch (

3

) which moves back and forth substantially parallel to a longitudinal direction (L) of the preform (

1

), a feed duct (

9

) for feeding the plasma with grains of natural or synthetic silica (

11

), characterized in that the same feed duct (

9

) feeds the plasma with a fluorine or chlorine compound, preferably a fluorine compound, mixed with a carrier gas (

15

).

Sodium or lithium contained in the grains of natural or synthetic silica reacts with the fluorine or chlorine of the fluorine or chlorine compound, making it possible to improve the optical quality of fibers built up with the natural or synthetic silica at reduced cost.

Title
Method of purifying silica and depositing on an optical fiber preform
Application Number
9/137141
Publication Number
6269663 (B1)
Application Date
August 20, 1998
Publication Date
August 7, 2001
Inventor
Jean Florent Campion
Bois Colombes
US
Pierre Ripoche
Pithiviers
US
Yves Lumineau
Herblay
US
Benoit Gouez
Acheres
US
Alain Drouart
Nanterre
US
Agent
Sughrue Mion Zinn Macpeak & Seas PLLC
US
Assignee
Alcatel
US
IPC
C03B 37/18
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