Method of fabricating optical fiber preforms

Details Method of fabricating optical fiber preforms Method of fabricating optical fiber preforms

1984-02-06

1990-04-10

Schor, Kenneth M.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 1, 65144, C03B 37018

Patent

active

049157175

ABSTRACT:
An improved method for fabricating an optical fiber preform by the vapor phase axial deposition (VAD) method, comprises forming core and cladding soots at the same time by the use of core and cladding burners. The improvement is that the cladding burner is designed so that at least one of the outlets for a feed material gas, a fuel gas, an auxiliary fuel gas, and an inert gas is composed of a plurality of openings. In this improved method, the temperature distribution from the boundary of the core soot to the periphery of the cladding soot is made smooth, and thus the cladding soot is prevented from cracking.

REFERENCES:
patent: 4062665 (1971-12-01), Izawa et al.
patent: 4345928 (1982-08-01), Kawachi et al.
patent: 4367085 (1983-01-01), Suto et al.
patent: 4414012 (1943-11-01), Suto et al.
patent: 4465708 (1984-08-01), Fanucci et al.
Sudo et al, "Refractive-Index Profile Control Techniques in the Vapor-Phase Axial Deposition Method", Transaction of the IECE of Japan, vol. E64, No. 8, Aug. 1981, pp. 536-543.

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