Method of making core holes in cast optical fiber preforms by dr

Details Method of making core holes in cast optical fiber preforms by dr Method of making core holes in cast optical fiber preforms by dr

1996-01-31

1998-10-27

Hoffmann, John

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

With measuring, controlling, sensing, programming, timing,...

65385, 65388, 65404, 65DIG4, 65 68, C03B 37017

Patent

active

058273468

ABSTRACT:
A method of making core holes in cast cladding glass for fabricating optical fiber preforms to make single and multimode optical fibers. Liquid cladding glass is pored into a casting mold having a metallic wire that is translated through the liquid glass as it cools so that the wire essentially carves out a smooth cylindrical core hole along the cylindrical axis of the cooled cladding glass. The method substantially reduces surface contamination at the interface of the core hole and the cladding glass because any liquid glass that comes in contacts with the metallic wire is removed during the process, leaving behind a pristine glass surface.

REFERENCES:
patent: 1628417 (1927-05-01), Miller
patent: 3587956 (1971-06-01), Oelke
patent: 3603127 (1971-09-01), Nurnberg
patent: 3762903 (1973-10-01), Hamilton

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