Method and apparatus for producing hermetic coated optical...

C - Chemistry – Metallurgy – 03 – B

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C03B 37/027 (2006.01) C03B 37/029 (2006.01) C03C 25/10 (2006.01) C03C 25/22 (2006.01)

Patent

CA 2048199

Abstract A hermetically coated optical fiber is produced by preparing a bare optical fiber by melting and drawing an optical fiber preform in a fiber drawing furnace and then introducing the bare optical fiber into a reactor in which a raw material gas is provided, whereby to form in the reactor a hermetic film around the surface of the bare optical fiber by a chemical vapor deposition method or pyrolysis. Part of an inert gas for purging the fiber drawing furnace, which has been heated by a heater in the furnace is removed, and the rest of the inert gas is introduced into the reactor for diluting the raw material gas.

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