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US 6,667,257 B2Granted
Heavy metal modified silica glass fibers doped with thulium, holmium, and thulium-sensitized-holmium high quantum efficiencies
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsBrian J. Cole, Michael L. Dennis
Life of this patent
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Abstract
A modified silica glass composition for providing a reduction in the multiphonon quenching for a rare-earth dopant comprising: SiO2 in a host material; a rare-earth dopant; a first SiO2 modifier; and a second SiO2 modifier; such that said first modifier and said second modifier reduce multiphonon quenching of the rare-earth dopant contained therein.
Claims24
A modified silica glass providing a reduction in the multiphonon quenching for a rare-earth dopant comprising:
- SiO2 in a host material;
- a rare-earth dopant selected from the group consisting of Tm3+, Ho3+and Tm3+sensitized—Ho3+;
- a first SiO2 modifier;
- wherein said first modifier is a 3+cation dopant, and
- wherein said first modifier is selected from the group consisting of Ga, Y and combinations thereof such that said first modifier reduces multiphonon quenching of said rare-earth dopant contained therein.
2 more elements
A composition made by combining:
- between about 70 and about 99 molar percent SiO2;
- between about 100 and about 100,000 ppm by weight of a rare-earth dopant selected from the group consisting of thulium, holmium and thulium-sensitized-holmium;
- between about 0.1 and about 20 molar percent of a first modifier;
- and
- between about 0.1 and about 10 molar percent of a second modifier;
- such that said first and second modifiers reduce multiphonon quenching of said rare-earth contained therein
- wherein said first modifier is selected from the group consisting of Ga, Y and combinations thereof which is suitable to reduce multiphonon quenching for said rare-earth dopant so that said rare-earth dopant permits significant emission at a wavelength between about 1.4 to about 2.0 μm when pumped.
4 more elements
Dependencies are inferred from the claim text.