Method and apparatus for making optical fiber waveguides

Details Method and apparatus for making optical fiber waveguides Method and apparatus for making optical fiber waveguides

1980-06-19

1982-05-04

Fisher, Richard V.

Glass manufacturing

Processes

Forming product or preform from molten glass

65144, C03B 3707, C03B 37075

Patent

active

043280188

ABSTRACT:
A glass optical fiber waveguide preform is prepared by chemical reaction of vapor ingredients within a bait tube. As the reactants flow through the bait tube, a hot zone traverses the tube to cause the deposition of soot in a section of the tube just downstream of the hot zone. An axially disposed heater, which is located just downstream from the hot zone in the vicinity of the soot deposit, is mechanically coupled to the burner which generates the hot zone. The heater enhances the thermophoresis effect, thereby increasing deposition rate and efficiency. Also, a gas may be flowed over the surface of the heater to confine the reactant vapors to an annular channel adjacent the bait tube wall and to prevent soot deposition on the heater. The heater may comprise an enlarged end portion to cause soot to flow toward the bait tube wall in the deposition region.

REFERENCES:
patent: 3654895 (1972-04-01), Bloom et al.
patent: 4117802 (1978-10-01), Le Sergent et al.
patent: 4233045 (1980-11-01), Sarkar
patent: 4235616 (1980-11-01), Siegfried
patent: 4263032 (1981-04-01), Sinclair

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