Optical waveguide article including a fluorine-containing zone
Assignee3M Innovative Properties Company
InventorsMark T. Anderson, Craig R. Schardt, James R. Onstott, Lawrence J. Donalds, Alessandra O. Chiareli
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Abstract
An optical article including a core; at least one cladding layer; and a narrow fluorine reservoir between the core and the cladding layer. The fluorine reservoir has a higher concentration of fluorine than either the cladding layer or the core. One particular embodiment includes a core including a halide-doped silicate glass that comprises approximately the following in cation-plus-halide mole percent 0.25-5 mol % Al2O3, 0.05-1.5 mol % La2O3, 0.0005-0.75 mol % Er2O3, 0.5-6 mol % F, 0-1 mol % Cl.
Claims33
An optical article comprising:
- a) a core;
- b) at least one cladding layer;
- c) a narrow fluorine reservoir between the core and the cladding layer;
- d) wherein the fluorine reservoir has a higher concentration of fluorine than the cladding layer and the core.
An optical fiber comprising:
- a) a core;
- b) a concentric cladding, the core and the cladding having a core/clad interface;
- and
- c) a fluorine concentration zone extending from the core/clad interface of the core and the cladding and overlapping across at least a portion of the core and the cladding, the zone comprising a highest concentration of fluorine approximately at the core/clad interface.
Dependencies are inferred from the claim text.