Method for the production of semiproduct for the production of l

Details Method for the production of semiproduct for the production of l Method for the production of semiproduct for the production of l

1979-02-09

1980-11-25

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 4B, 65 13, 65 60D, 350 9630, 350 9634, C03C 2502

Patent

active

042356156

ABSTRACT:
A semiproduct for use in the manufacture of light conducting fibers comprising a core of synthetic quartz glass having a thickness of 6 to 400 mm, the quartz glass containing less than 10 ppm hydroxyl ions and having, in the near infrared spectral range, an optical loss totaling less than 4 dB/km, measured in the mass, the core being fused with a jacket having a wall thickness of 2 to 20 mm and consisting essentially of synthetic quartz glass containing more than 4,000 ppm of fluorine, the jacket having a length of at least 200 mm; a method of producing the same and light conducting fibers derived therefrom.

REFERENCES:
patent: 3868170 (1975-02-01), DeLuca
patent: 3877912 (1975-04-01), Shiraishi et al.
patent: 3981707 (1976-09-01), Araujo et al.

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