Method for making optical fiber preforms

C - Chemistry – Metallurgy – 03 – B

Patent

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Details

C03B 37/14 (2006.01) C03B 37/018 (2006.01)

Patent

CA 2118351

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 anoxidizing 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.

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