C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
117/85
C03B 20/00 (2006.01) C03B 37/014 (2006.01) C03B 37/018 (2006.01) G02B 6/00 (2006.01)
Patent
CA 1265711
- 1 - Abstract The invention provides 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 a 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 pro- duced by this method contains fewer hydroxyl groups and structural defects than conventional products. Moreover, an optical fiber fabricated from the glass preform has stable light transmission characteristics over a long period of time.
484182
Kyoto Michihisa
Nakahara Motohiro
Tanaka Shigeru
Watanabe Minoru
Kirby Eades Gale Baker
Nippon Telegraph And Telephone Corporation
Sumitomo Electric Industries Ltd.
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