Title: Method for producing glass preform for optical fiber
Application Number: 85102346 Application Date: 1985.04.01
Publication Number: 1007125 Publication Date: 1987.01.17
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C03B37/012
Applicant(s) Name: Sumitomo Electric Industries, Ltd. (JP) No.15, Kit Address:
Inventor(s) Name: Michihisa Kyoto
Attorney & Agent: LUO HONG LIU YUANJIN
Abstract:
     A method for producing a GeO2-SiO2 type glass preform for an optical fiber comprising dehydrating a porous soot preform of GeO2-SiO2 glass fine particles in an atmosphere of oxygen contg. a fluorine-contg. compound at such a temp. that the preform does not drastically shrink, and sintering the soot preform in an atmosphere comprising helium at such a temp. that the preform is made transparent, by which contamination with impurities, residual water and bubbles in the optical fiber and irregularity of the surface of the optical fiber are greatly reduced.
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