MCVD method of making a low OH fiber preform with a hydrogen-fre

Details MCVD method of making a low OH fiber preform with a hydrogen-fre MCVD method of making a low OH fiber preform with a hydrogen-fre

1993-11-30

1995-03-14

Jones, W. Gary

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

Process of manufacturing optical fibers, waveguides, or...

65419, 65417, 65425, 65426, C03B 37018

Patent

active

053973720

ABSTRACT:
A method for making a glass preform substantially free of OH impurities is disclosed. The method comprises the steps of introducing a moving stream of a vapor mixture including at least one compound glass-forming precursor together with an oxidizing medium into a tube, while generating a hydrogen-free isothermal plasma on an outer surface of the tube to react the mixture and produce a glassy deposit on an inner surface of the tube. The method uses a plasma torch or a radio frequency furnace.

REFERENCES:
patent: 4334903 (1982-06-01), MacChesney et al.
patent: 4419116 (1983-12-01), Nakahara
patent: 4707173 (1987-11-01), Kawazoe
patent: 5000771 (1991-03-01), Fleming, Jr. et al.

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