Method of making optical fibers having improved core roundness

C - Chemistry – Metallurgy – 03 – B

Patent

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49/8, 88/97

C03B 37/018 (2006.01) C03B 23/07 (2006.01)

Patent

CA 1149615

Abstract of the Disclosure A method of producing optical fibers having improved core roundness and core-clad axis concentricity. Prior to the step of forming a layer of core material on the inner surface of a bait tube, the tube is pressurized and heated and shrunk at least 1 mm and thereafter the pressure is increased to inflate the tube until the outside diameter thereof approximates that of the originally provided bait tube.

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