Methods of and apparatus for coating optical fibers

Details Methods of and apparatus for coating optical fibers Methods of and apparatus for coating optical fibers

C - Chemistry, Metallurgy

23

C

32/23, 117/81, 4

C23C 16/54 (2006.01) C03C 25/22 (2006.01)

Patent

CA 2026958

An optical fiber (24), destined to receive a hermetic coating (32), is moved through a hermetic coating apparatus (30) wherein the fiber, entering the hermetic coating apparatus at a predetermined temperature, is caused to be engaged by a reactive gas. The reactive gas, reacting with the heated fiber, is effective to cause a layer of a hermetic material to be deposited adjacent to the outer surface of the fiber. A cross-flow purge gas is effective to prevent a resultant accumulation of a soot comprising reactive components of the reactive gas adjacent to portions of the hermetic coating apparatus which become heated by the fiber. Failure to prevent the accumulation of the soot may lead to fiber abrasions and reduced fiber strength.

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