Selective volitization method for preparing fiber optics

Details Selective volitization method for preparing fiber optics Selective volitization method for preparing fiber optics

1988-01-21

1989-07-18

Lindsay, Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 2, 427163, C03B 37023

Patent

active

048489980

ABSTRACT:
A method for fabricating optical fibers having a rare-earth doped core and a fused silica cladding includes inserting a rare-earth doped soft glass rod into a fused silica tube, the ratio of the outer diameter (OD) to the inner diameter (ID) of the fused silica tube being at least 2 and as large as 50; heating the rod and tube combination in a furnace to selectively volatilize volatile constituents of the soft glass rod which are responsible for the low softening point so that the final composition of the core consists predominantly of SiO.sub.2 and the desired dopants such as rare earths, alkaline earths or other low vapor pressure materials; and drawing the perform into an optical fiber.

REFERENCES:
patent: 4163654 (1979-08-01), Krohn et al.
patent: 4203743 (1980-05-01), Suganuma et al.
patent: 4277270 (1981-07-01), Krohn
patent: 4372767 (1983-02-01), Maklad

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