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

1980-07-24

1982-01-12

Fisher, Richard V.

Glass manufacturing

Processes

Forming product or preform from molten glass

65144, 65157, 65 182, 427163, 427237, 118724, 118725, C03B 3707, C03B 37075

Patent

active

043103405

ABSTRACT:
A glass optical 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 tubular burner, which is located just upstream from the hot zone, is mechanically coupled to the burner which generates the hot zone. The burner generates an axial water-free flame that extends through the hot zone. The flame creates a mandrel which confines the flow of reactants to an annular channel adjacent the bait tube wall in the hot zone. The flame also extends downstream from the hot zone where it increases the thermal gradient between the axis and the wall of the bait tube, thereby enhancing the thermophoresis effect, whereby deposition rate and efficiency are improved.

REFERENCES:
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 et al.

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