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

117/85

C03B 37/018 (2006.01) C03B 37/014 (2006.01)

Patent

CA 1238247

- 1 - Abstract The invention provides a method for producing a glass preform comprising flame hydrolyzing a glass raw material in an oxyhydrogen flame to form fine glass particles of quartz, depositing the fine glass particles on a seed mem- ber to produce a solid or hollow cylindrical soot preform, at least a part of which contains GeO2, and heating and sintering the soot preform by introducing it into an atmos- phere comprising an inert gas at least a part of which is kept at a temperature not lower than 1,600°C at an intro- ducing rate not smaller than 3 mm/min. An optical fiber having a longitudinally homogeneous composition and a low attenuation of light transmission can be fabricated from the glass preform produced by this method.

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