Method for producing glass preform for optical fiber

Details Method for producing glass preform for optical fiber Method for producing glass preform for optical fiber

C - Chemistry, Metallurgy

03

B

49/82

C03B 37/012 (2006.01)

Patent

CA 1272604

Abstract The invention provides a rod-in-tube method for producing a glass preform for use in the fabrication of an optical fiber. The method comprises the steps of inserting a glass rod used as a core material into a glass tube used as a cladding material, fusing and closing one end of the cladding material, filling the gap between the core and cladding materials with an atmosphere containing at least one gaseous halogen-containing compound and then heating the core and cladding materials at a temperature not lower than 1,900°C to collapse the gap between them and to fuse them together. Using the resulting glass preform, an optical fiber having low attenuation of light transmission can be fabricated.

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