Method for the production of semiproduct for the production of light conducting fibers
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United States of America Patent
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Nov 25, 1980
Issued Date -
N/A
app pub date -
Feb 9, 1979
filing date -
Aug 16, 1975
priority date (Note) -
Expired
status (Latency Note)
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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.
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