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

1987-02-19

1988-11-01

Lindsay, Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 182, 65 32, C03B 37018

Patent

active

047817402

ABSTRACT:
A method for producing a glass preform for an optical fiber comprising jetting SiCl.sub.4 as a glass-forming raw material and an insert gas from a first nozzle of a multi-nozzle burner and, as another glass-forming raw material, at least one hydrogen-containing silicon compound with larger oxidation or hydrolysis reaction heat than that of SiCl.sub.4 selected from the group consisting of SiHCl.sub.3, SiH.sub.2 Cl.sub.2, SiH.sub.3 Cl and SiH.sub.4 from a second nozzle surrounding the first nozzle, flame hydrolyzing or oxidizing the glass-forming raw materials to synthesize glass soot particles, depositing the glass soot particles on a starting member to form a porous soot preform with a controlled bulk density distribution and heating and sintering the soot preform to obtain a transparent glass preform, by which a large glass preform is stably produced without cracking.

REFERENCES:
patent: 4002512 (1977-01-01), Lim
patent: 4367013 (1983-01-01), Guerder et al.
patent: 4402720 (1983-09-01), Edahiro et al.
Patent Abstract, Image Fiber, vol. 6, #75 (P-114) (593) May 12, 1982.

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