Method of making fluorine doped optical preform and fiber and resultant articles
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United States of America Patent
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Dec 16, 1986
Grant Date -
N/A
app pub date -
Sep 26, 1983
filing date -
Sep 26, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention relates to a method forming fluorine-doped glass. A coating of glass particles is deposited on the surface of a cylindrical rod of high purity glass. The coated rod is inserted into a furnace which contains a cylindrical muffle formed of high silica content glass. A fluorine-containing atmosphere is flowed through the muffle and over the outer surface of the coating of glass particles and also flows inwardly through the interstices thereof. The temperature within the furnace is sufficiently high to cause fluorine to diffuse into the surfaces of the glass particles and to cause the particles to fuse and form a fluorine-containing dense glass coating on the surface of the rod.
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