Sol-gel doping of optical fiber preform

Details Sol-gel doping of optical fiber preform Sol-gel doping of optical fiber preform

1991-04-12

1992-06-23

Jones, W. Gary

Glass manufacturing

Processes

Forming product or preform from molten glass

65 311, 65901, 65 6052, 501 12, C03C 2502

Patent

active

051239400

ABSTRACT:
The method includes collapsing a silica-based glass tube to make a preform and drawing fiber from the preform. Prior to collapsing the tube, one or more glass layers are formed on the inner surface of the tube by dip-coating the surface with a sol comprising a metal alkoxide dissolved in an alcoholic or aqueous solvent, polymerizing the sol to form a gel, and drying and sintering the gel. A substantial portion the dopant, present within the sintered gel, diffuses into at least one adjoining glass region. A wide selection of dopant materials, in the form of salts or alkoxides, are readily incorporated by dissolving them in the solvent.

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