Optical fibre manufacture

Details Optical fibre manufacture Optical fibre manufacture

1986-12-11

1988-04-05

Kellogg, Arthur

Glass manufacturing

Processes

Forming product or preform from molten glass

65 111, 65 181, 65DIG16, C03C 1702, C03C 2502

Patent

active

047356480

ABSTRACT:
In an inside tube vapor phase deposition process for the production of doped silica glass by an oxidation reaction for optical fibre manufacture, in particular fluorine doped silica, the oxidation reaction is prevented from occurring until the reactant material, for example silicon tetrachloride and a fluorinating reagent, has been heated to a temperature above that required for the oxidation reaction. This preheating of the reactant material results in the oxidation reaction producing compositions of glasses which are not allowed from thermodynamic considerations at the lower temperature usually employed for the oxidation reaction, for example silica more highly doped with fluorine than hitherto achieved.

REFERENCES:
patent: Re30883 (1982-03-01), Rau
patent: 4235616 (1980-11-01), Siegfried
patent: 4292063 (1981-09-01), Abe
patent: 4378987 (1983-04-01), Miller et al.
patent: 4586943 (1986-05-01), Kyoto et al.

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