Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1991-03-29
1992-10-13
Jones, W. Gary
Glass manufacturing
Processes
Forming product or preform from molten glass
156663, 21912141, 65 182, 65DIG16, 65 61, 65 315, 427163, 427167, C03C 2502
Patent
active
051547457
ABSTRACT:
A method of fabricating preforms for making optical fibers by drawing, in which a silica deposit, including a doping agent, is formed in successive layers inside a silica-based tube (1) from a chemical vapor containing a gaseous compound of silicon, oxygen, and a gaseous compound of an element for doping the silica, with the composite tube then being subjected to collapsing so as to cause the empty axial zone (3), the tube hollow, to disappear. The silica of the initial tube is then eliminated, by removal, after which a recharge of silica (5) is made around the remaining cylinder (4) by plasma torch deposition from a gas comprising oxygen and a halogen derivative of silica.
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Alcatel Alsthom Compagnie Generale d'Electricite
Bruckner John J.
Jones W. Gary
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