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US 11,554,978 B2Granted
Method for reducing processing time for optical fiber preforms
AssigneeCorning Incorporated
InventorsDana Craig Bookbinder, Richard Michael Fiacco, Ming-Jun Li, Jeffery Scott Stone, Pushkar Tandon
Life of this patent
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Abstract
A method for forming an optical glass preform from a soot preform is provided. The method includes forming a soot preform, placing the soot preform in a furnace, and applying a vacuum through a centerline hole of the soot preform.
Claims10
A method for forming an optical glass preform comprising:
- forming a first soot preform having a centerline hole, the first soot preform having a thickness and an outside surface, the first soot preform comprising soot;
- placing the first soot preform in a furnace;
- glazing the first soot preform to form a glazed soot preform, the glazing comprising:
- partially sintering the first soot preform to form a closed porosity layer on the outside surface, the closed porosity layer being less than an entirety of the first soot preform such that a remainder of the entirety of the first soot preform is not sintered;
- and
- applying a vacuum to the centerline hole of the glazed soot preform to evacuate gas residing in pores of the glazed soot preform.
3 more elements
Dependencies are inferred from the claim text.