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) G02B 6/00 (2006.01)

Patent

CA 1261685

- 1 - Abstract The invention provides a method for producing a glass preform for an optical fiber comprising jetting a raw material for glass containing SiC14 from a first nozzle of a multi-nozzle burner and a hydrogen-containing silicon compound with larger reaction heat than SiC14 from a second nozzle surrounding the first nozzle, flame hydro- lyzing the glass raw material to synthesize fine glass particles, depositing the glass particles on a starting member to form a porous soot preform having a controlled bulk density distribution and heating and sintering the soot preform to form a transparent glass preform. The method allows large glass preforms to be stably produced without cracking.

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