Process for the production of an optical waveguide preform

Details Process for the production of an optical waveguide preform Process for the production of an optical waveguide preform

1991-12-19

1993-06-01

Lindsay, Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 321, 65 13, 65 33, C03B 37075

Patent

active

052155641

ABSTRACT:
In the process for the production of an optical waveguide preform, in which the cladding layer is applied as a tubular powder layer onto a cylindrical glass core rod and is densified by heating, the powder layer has a relative density of approximately 6 percent, which is increased to 25-50 percent during the stabilization process. In order for this process to proceed without damage to the preform, the powder layer is initially heated at a low heating rate. From approximately 150.degree. C., the heating rate is increased until a higher temperature is reached.

REFERENCES:
patent: 4501601 (1985-02-01), Haupt
patent: 4772302 (1988-09-01), Abe
patent: 4775401 (1988-10-01), Fleming et al.
patent: 4867774 (1989-09-01), Dorn
patent: 5090980 (1992-02-01), Clasen

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