Hermetic coatings for non-silica based optical fibers
AssigneeSpecTran Corporation
InventorsLubos J. B. Vacha, Peter C. Schultz, Cornelius T. Moynihan, Satyabrata Raychaudhuri, Ken C. Cadien, Barry B. Harbison, Reza Mossadegh
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Abstract
A hermetically sealed optical fiber product comprising a fluoride or other non-silica based glass optical fiber and a hermetic coating of carbon, a metal, a fluoride, a metalloid or a ceramic compound in a thickness sufficient to impart moisture resistance to the optical fiber product.
Claims37
An optical fiber product having a non-silica based optical fiber and an encapsulating hermetic coating comprising at least one of carbon, an inorganic fluoride, a metalloid or a ceramic compound in a thickness sufficient to impart moisture resistance to said optical fiber product.
An optical fiber product having a non-silica glass core;
- an oxide coating of an alkali-boro-phosphate or an alkali-group II metal phosphate;
- and an encapsulating hermetic coating comprising at least one of carbon, a metal, a fluoride, a metalloid or a ceramic compound in a thickness sufficient to impart moisture resistance to said optical fiber product.
An optical fiber product having a non-silica optical fiber and an encapsulating hermetic coating comprising at least one of carbon, a metal, a metalloid, or a ceramic compound having a density of between about 3.2 and 6.3 g/cc, said hermetic coating having a coefficient of thermal expansion of between about 5.5.degree. and 15.degree..times.10.sup.-6 .degree.C..sup.-1 and being present in a thickness sufficient to impart moisture resistance to the optical fiber product.
An optical fiber product comprising:
- a core of a fluoride glass comprising about 25-39 mole percent ZrF.sub.4, about 13-27 mole percent HfF.sub.4, about 10-24 mole percent BaF.sub.2, about 1-6 mole percent LaF.sub.3, about 2-5 mole percent AlF.sub.3, about 9-25 mole percent NaF and 0 to 1 mole percent InF.sub.3 ;
- a fluoride glass cladding adjacent said core;
- an oxide glass coating of an alkali-borophosphate or an alkali-group II metal-phosphate adjacent said cladding;
- and an encapsulating hermetic coating comprising at lest one of carbon, a metal, a metalloid, or a ceramic compound having a density of between about 3.2 and 6.3 g/cc, said hermetic coating having a coefficient of thermal expansion of between about 5.5.degree. and 15.degree..times.10.sup.-6 .degree.C..sup.-1 and being present in a thickness sufficient to impart moisture resistance to the optical fiber product.
An optical fiber product having a non-silica glass optical fiber core of a selenide glass, germanium, BeF.sub.2, a chalcogenide glass, or a fluoride glass having (a) about 52-69 mole percent ZrF.sub.4, about 10-24 mole percent BaF.sub.2, about 1-7 mole percent LaF.sub.3, about 2-5 mole percent AlF.sub.3 and about 9-25 mole percent NaF or (b) about 25-39 mole percent ZrF.sub.4, about 13-27 mole percent HfF.sub.4, about 10-24 mole percent about 13-27 mole percent HfF.sub.4, about 10-24 mole percent BaF.sub.2, about 1-6 mole percent LaF.sub.3, about 2-5 mole percent AlF.sub.3, about 9-25 mole percent NaF and up to 1 mole percent InF.sub.3 ;
- and an encapsulating hermetic coating comprising at least one of carbon, a metal, a fluoride, a metalloid or a ceramic compound in a thickness sufficient to impart moisture resistance to said optical fiber product.
Dependencies are inferred from the claim text.