Title: Method for producing glass preform for optical fiber
Application Number: 85105140 Application Date: 1985.07.06
Publication Number: 1006260 Publication Date: 1986.12.31
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C03B37/01
Applicant(s) Name: Sumetomo Electric lndustries Ltd. (JP) Osaka Japan Address:
Inventor(s) Name:
Attorney & Agent: YANG LIQIN
Abstract:
     A method for producing a glass preform for an optical fiber comprising forming a fine glass particle mass by flame hydrolysis of a glass raw material, dehydrating the fine glass particle mass in an oxygen atmosphere containing chlorine or a chlorine-containing compound at such temperature that the soot preform is not considerably shrunk and heating the soot preform at a temperature at which the soot preform is sintered and made transparent, the glass preform produced by which method contains less hydroxyl groups, structural defects and an optical fiber fabricated from said glass preform has stable light transmission characteristics for a long time.
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