Optical fiber wave-guides for signal transmission comprising multiple component glass with an adjusted expansion co-efficient between the core and mantle
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United States of America Patent
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Mar 25, 1980
Issued Date -
N/A
app pub date -
Jan 29, 1979
filing date -
Apr 9, 1976
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention discloses an optical fiber wave-guide for signal transmission in which the signal fiber has a linear thermal expansion co-efficient in all of the fiber elements above 15.times.10.sup.-7 /.degree.C. in which the outer mantle is composed of the silicon dioxide modified glass, and the optical fiber wave-guide is composed of an inner silicon dioxide-free mantle employing germanium oxide and other components and has an inner silicon dioxide-free core which is composed of germanium oxide and optionally other additives. The fiber is produced according to the chemical vapor deposition process, and preferably has a refractive index gradient which has the shape of a parabola.
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