Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1988-12-22
1989-11-14
Schor, Kenneth M.
Glass manufacturing
Processes
Forming product or preform from molten glass
65 182, 65 301, 65DIG16, C03B 37018, C03B 37027
Patent
active
048804525
ABSTRACT:
A method for producing a glass preform for an optical fiber comprising a core and a cladding containing fluorine is fisclosed. The method comprises forming a porous glass layer of substantially pure quartz on an outer surface of a fused glass rod consisting of a central portion of substantially pure quartz and a peripheral portion of quartz glass containing fluorine, and heating a composite of the fused glass rod and the porous glass layer in an atmosphere containing fluorine to add fluorine to the porous glass layer and to make it transparent, by which contamination of glass with hydroxyl groups can be prevented and light transmission characteristics of an optical fiber fabricated from the glass preform are improved.
REFERENCES:
patent: Re30883 (1982-03-01), Rau et al.
patent: 4082420 (1978-04-01), Shiraishi et al.
patent: 4161505 (1979-07-01), Shiraishi et al.
patent: 4221825 (1980-09-01), Guerder et al.
patent: 4257797 (1981-03-01), Andrejco
patent: 4295869 (1981-10-01), Shiraishi et al.
patent: 4298365 (1981-11-01), Bailey et al.
patent: 4358181 (1982-11-01), Gulati et al.
patent: 4579571 (1986-04-01), Hicks
patent: 4586943 (1986-05-01), Kyoto
patent: 4599098 (1986-07-01), Sarkar
Hosaka, Toshihito et al., "Analysis of OH-Ion Diffusion in Single Mode Optical Fibers," Bulletin of Electrical Communication Society, Japan, vol. J64-C, No. 7, pp. 114-120.
Patent Abstracts of Japan, JP-A-55 67 533 (Nippon Denshin Denwa Kosha) 21-05-1980 (Cat. A,D).
Kanamori Hiroo
Kyoto Michihisa
Mizutani Futoshi
Tanaka Gotaro
Yoshioka Naoki
Schor Kenneth M.
Sumitomo Electric Industries Ltd.
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