Patents by Inventor Adam J. G. Ellison
Adam J. G. Ellison has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6656859Abstract: A family of tellurite glasses and optical components for telecommunication systems, the glasses consisting essentially of, as calculated in cation percent, 65-97% TeO2, and at least one additional oxide of an element having a valence greater than two and selected from the group consisting of Ta, Nb, W, Ti, La, Zr, Hf, Y, Gd, Lu, Sc, Al and Ga, that may contain a lanthanide oxide as a dopant, in particular erbium oxide, and that, when so doped, is characterized by a fluorescent emission spectrum having a relatively broad FWHM value.Type: GrantFiled: December 6, 2001Date of Patent: December 2, 2003Assignee: Corning IncorporatedInventors: Bruce G. Aitken, Adam J. G. Ellison, Randall E. Youngman
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Patent number: 6621624Abstract: Disclosed are optical gain fibers which include an erbium-containing core and a cladding surrounding the core and which have ripple of less than about 25% over about a 40 nm wide window or ripple of less than about 15% over about a 32 nm wide window, or both. In one embodiment, the optical gain fibers are pumpable at 980 nm and at 1480 nm. In another embodiment, the optical gain fibers are fusion sliceable. In yet another embodiment, the core includes oxides erbium; the cladding includes silicon dioxide; and the optical gain fiber has a passive loss of less than about 0.5% of the peak absorption of the erbium absorption band in the vicinity of 1530 nm. The optical gain fibers of the present invention have a wider gain window, improved flatness across the gain window, and/or increased gain as compared to conventional optical gain fibers.Type: GrantFiled: January 10, 2002Date of Patent: September 16, 2003Assignee: Corning IncorporatedInventors: Polly W. Chu, Adam J. G. Ellison, Douglas E. Goforth, Daniel W. Hawtof, Joseph M. Whalen
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Publication number: 20030161598Abstract: The present invention relates to a glass article for use as an optical waveguide fiber and more particularly to an optical waveguide fiber, the core of which is doped with a chalcogenide element to significantly increase the refractive index of the core. The subject of this invention is novel doped silica core compositions wherein a portion of the oxygen in the silica is replaced with either sulfur, selenium or tellurium using plasma enhanced chemical vapor deposition (PECVD). These compositions are designed to have higher refractive indices than silica, low coefficients of expansion, high optical transparency, and appropriate viscosity and softening points to make them ideal candidates for use as optical waveguide fibers.Type: ApplicationFiled: February 4, 2003Publication date: August 28, 2003Inventors: Adam J.G. Ellison, Rostislav R. Khrapko
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Publication number: 20030128955Abstract: An isotopically-altered, silica based optical fiber is provided having lower losses, broader bandwidth, and broader Raman gain spectrum characteristics than conventional silica-based fiber. A heavier, less naturally abundant isotope of silicon or oxygen is substituted for a lighter, more naturally abundant isotope to shift the infrared absorption to a slightly longer wavelength. In one embodiment, oxygen-18 is substituted for the much more naturally abundant oxygen-16 at least in the core region of the fiber. The resulting isotopically-altered fiber has a minimum loss of 0.044 dB/km less than conventional fiber, and a bandwidth that is 17 percent broader for a loss range between 0.044-0.034 dB/km. The fiber may be easily manufactured with conventional fiber manufacturing equipment by way of a plasma chemical vapor deposition technique. When a 50 percent substitution of oxygen-18 for oxygen-16 is made in the core region of the fiber, the Raman gain spectrum is substantially broadened.Type: ApplicationFiled: December 18, 2002Publication date: July 10, 2003Inventors: Douglas C. Allan, John T. Brown, Lisa C. Chacon, Adam J. G. Ellison, James C. Fajardo, Stuart Gray, Keith L. House, Karl W. Koch, Dale R. Powers, James A. West
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Patent number: 6556757Abstract: The disclosed invention includes an amplifier fiber and methods of making the amplifier fiber. One embodiment of the inventive fiber includes a glass core and a glass cladding layer surrounding the glass core. The cladding glass layer has a refractive index which is less than a refractive index of the glass core. The fiber also includes a glass overclad layer surrounding the cladding layer. The overclad layer has a refractive index which is greater than the refractive index of the cladding layer. In another embodiment of the inventive fiber, the overclad layer is doped with an absorber. The absorber strips a mode of light propagating in the cladding from the cladding layer.Type: GrantFiled: February 26, 2001Date of Patent: April 29, 2003Assignee: Corning IncorporatedInventors: Adam J.G. Ellison, John D. Minelly, Jackson P. Trentelman
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Patent number: 6555232Abstract: A family of titania lanthana aluminosilicate glasses, and products such as an electronic device having a poly-silicon coating on such glass as a substrate, are disclosed. The glasses have a strain point in excess of 780° C., a coefficient of thermal expansion of 20-60×10−7/° C., a Young's modulus of greater than 12 Mpsi and are chemically durable.Type: GrantFiled: November 28, 2001Date of Patent: April 29, 2003Assignee: Corning, IncorporatedInventors: Bruce G. Aitken, Adam J. G. Ellison, Thomas E. Paulson
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Patent number: 6542690Abstract: The present invention relates to a glass article for use as an optical waveguide fiber and more particularly to an optical waveguide fiber, the core of which is doped with a chalcogenide element to significantly increase the refractive index of the core. The subject of this invention is novel doped silica core compositions wherein a portion of the oxygen in the silica is replaced with either sulfur, selenium or tellurium using plasma enhanced chemical vapor deposition (PECVD). These compositions are designed to have higher refractive indices than silica, low coefficients of expansion, high optical transparency, and appropriate viscosity and softening points to make them ideal candidates for use as optical waveguide fibers.Type: GrantFiled: May 8, 2000Date of Patent: April 1, 2003Assignee: Corning IncorporatedInventors: Adam J. G. Ellison, Rostislav R. Khrapko
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Patent number: 6503860Abstract: According to one aspect of the present invention an optically active glass contains Sb2O3, up to about 4 mole % of an oxide of a rare earth element, and 0-20 mole % of a metal halide selected from the group consisting of a metal fluoride, a metal bromide, a metal chloride, and mixtures thereof, wherein this metal is a trivalent metal, a divalent metal, a monovalent metal, and mixtures thereof. In addition, any of the glass compositions described herein may contain up to 15 mole % B2O3 substituted for an equivalent amount of Sb2O3.Type: GrantFiled: February 4, 2000Date of Patent: January 7, 2003Assignee: Corning IncorporatedInventors: James E. Dickinson, Adam J. G. Ellison, Alexandre M. Mayolet, Michel Prassas
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Publication number: 20020196529Abstract: Disclosed are optical gain fibers which include an erbium-containing core and a cladding surrounding the core and which have ripple of less than about 25% over about a 40 nm wide window or ripple of less than about 15% over about a 32 nm wide window, or both. In one embodiment, the optical gain fibers are pumpable at 980 nm and at 1480 nm. In another embodiment, the optical gain fibers are fusion sliceable. In yet another embodiment, the core includes oxides erbium; the cladding includes silicon dioxide; and the optical gain fiber has a passive loss of less than about 0.5% of the peak absorption of the erbium absorption band in the vicinity of 1530 nm. The optical gain fibers of the present invention have a wider gain window, improved flatness across the gain window, and/or increased gain as compared to conventional optical gain fibers.Type: ApplicationFiled: January 10, 2002Publication date: December 26, 2002Inventors: Polly W. Chu, Adam J.G. Ellison, Douglas E. Goforth, Daniel W. Hawtof, Joseph M. Whalen
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Patent number: 6444599Abstract: The present invention relates to an oxyhalide glass matrix including 0-70 mol. % SiO2, 5-35 mol. % Al2O3, 1-50 mol. % B2O3, 5-35 mol. % R2O, 0-12 wt. % F, 0-12 wt. % Cl, and 0 to 0.2 mol. % rare earth element, wherein R is Li, Na, K, Rb, or Cs. The present invention further relates to a method of producing the glass matrix and to a method of modifying the spectral properties of an oxyhalide glass.Type: GrantFiled: June 1, 2000Date of Patent: September 3, 2002Assignee: Corning IncorporationInventors: James E. Dickinson, Adam J. G. Ellison
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Publication number: 20020082156Abstract: A family of tellurite glasses and optical components for telecommunication systems, the glasses consisting essentially of, as calculated in cation percent, 65-97% TeO2, and at least one additional oxide of an element having a valence greater than two and selected from the group consisting of Ta, Nb, W, Ti, La, Zr, Hf, Y, Gd, Lu, Sc, Al and Ga, that may contain a lanthanide oxide as a dopant, in particular erbium oxide, and that, when so doped, is characterized by a fluorescent emission spectrum having a relatively broad FWHM value.Type: ApplicationFiled: December 6, 2001Publication date: June 27, 2002Inventors: Bruce G. Aitken, Adam J. G. Ellison, Randall E. Youngman
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Publication number: 20020082158Abstract: Glasses are disclosed which are used to produce substrates in flat panel display devices. The glasses exhibit a density less than about 2.45 gm/cm3 and a liquidus viscosity greater than about 200,000 poises, the glass consisting essentially of the following composition, expressed in terms of mol percent on an oxide basis: 65-75 SiO2, 7-13 Al2O3, 5-15 B2O3, 0-3 MgO, 5-15 CaO, 0-5 SrO, and essentially free of BaO. The glasses also exhibit a strain point exceeding 650° C.Type: ApplicationFiled: November 16, 2001Publication date: June 27, 2002Applicant: Corning IncorporatedInventors: Lisa C. Chacon, Adam J.G. Ellison, George B. Hares, Jeffrey T. Kohli, Josef C. Lapp, Robert Morena
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Patent number: 6410467Abstract: A glass consisting essentially of antimony oxide. An optically active glass consisting essentially of antimony oxide and up to about 4 mole % of an oxide of a rare earth element. A rare earth-doped, antimony oxide-containing glass including 0-99 mole % SiO2, 0-99 mole % GeO2, 0-75 mole % (Al, Ga)2O3, 0.5-99 mole % Sb2O3, and up to about 4 mole % of an oxide of a rare earth element. The oxide of the rare earth element may comprise Er2O3. The glass of the invention further includes fluorine, expressed as a metal fluoride. An optical energy-producing or light-amplifying device, in particular, an optical amplifier, comprising the above-described glass. The optical amplifier can be either a fiber amplifier or a planar amplifier, either of which may have a hybrid composition. Embodiments of the glass of the invention can be formed by conventional glass making techniques, while some of the high content antimony oxide embodiments are formed by splat or roller quenching.Type: GrantFiled: April 8, 1999Date of Patent: June 25, 2002Assignee: Corning IncorporatedInventors: James E. Dickinson, Adam J G Ellison, Alexandre M. Mayolet, Michel Prassas
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Patent number: 6360564Abstract: A sol-gel method of preparing a powder for use in forming a glass is provided, along with methods of preparing glasses and glass fibers from the powder. The inventive method allows for the incorporation of a wide range of elements and compositions into a homogeneous glass or glass fiber that is substantially free of hydroxide groups. In addition, dopants incorporated into glasses prepared by the inventive method are uniformly distributed throughout the glass structure.Type: GrantFiled: January 20, 2000Date of Patent: March 26, 2002Assignee: Corning IncorporatedInventors: Lauren K. Cornelius, Adam J. G. Ellison, Ljerka Ukrainczyk
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Patent number: 6352950Abstract: A family of alkali-tungsten-tellurite glasses that consist essentially of, as calculated in mole percent, 10-90% TeO2, at least 5% W03 and at least 0.5% R2O where R is Li, Na, K, Cs, Tl and mixtures, that may contain a lanthanide oxide as a dopant, in particular erbium oxide, and that, when so doped, is characterized by a fluorescent emission spectrum having a relatively broad FWHM value.Type: GrantFiled: May 31, 2000Date of Patent: March 5, 2002Assignee: Corning IncorporatedInventors: Bruce G. Aitken, Adam J. G. Ellison
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Publication number: 20010055456Abstract: The disclosed invention includes an amplifier fiber and methods of making the amplifier fiber. One embodiment of the inventive fiber includes a glass core and a glass cladding layer surrounding the glass core. The cladding glass layer has a refractive index which is less than a refractive index of the glass core. The fiber also includes a glass overclad layer surrounding the cladding layer. The overclad layer has a refractive index which is greater than the refractive index of the cladding layer. In another embodiment of the inventive fiber, the overclad layer is doped with an absorber. The absorber strips a mode of light propagating in the cladding from the cladding layer.Type: ApplicationFiled: February 26, 2001Publication date: December 27, 2001Inventors: Adam J.G. Ellison, John D. Minelly, Jackson P. Trentelman
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Patent number: 6319867Abstract: Glasses are disclosed which are used to produce substrates in flat panel display devices. The glasses exhibit a density less than about 2.45 gm/cm3 and a liquidus viscosity greater than about 200,000 poises, the glass consisting essentially of the following composition, expressed in terms of mol percent on an oxide basis: 65-75 SiO2, 7-13 Al2O3, 5-15 B2O3, 0-3 MgO, 5-15 CaO, 0-5 SrO, and essentially free of BaO. The glasses also exhibit a strain point exceeding 650° C.Type: GrantFiled: November 22, 1999Date of Patent: November 20, 2001Assignee: Corning IncorporatedInventors: Lisa C. Chacon, Adam J. G. Ellison, George B. Hares, Jeffrey T. Kohli, Josef C. Lapp, Robert Morena
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Patent number: 6194334Abstract: A family of alkali-tungsten-tellurite glasses that consist essentially of, as calculated in mole percent, 10-90% TeO2, at least 5% WO3 and at least 0.5% R2O where R is Li, Na, K, Cs, Tl and mixtures, that may contain a lanthanide oxide as a dopant, in particular erbium oxide, and that, when so doped, is characterized by a fluorescent emission spectrum having a relatively broad FWHM value.Type: GrantFiled: June 18, 1999Date of Patent: February 27, 2001Assignee: Corning IncorporatedInventors: Bruce G. Aitken, Adam J. G. Ellison
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Patent number: 6153103Abstract: A method of separating ultra-fine particulates from an aqueous suspension such as a process stream or a waste stream. The method involves the addition of alkali silicate and an organic gelling agent to a volume of liquid, from the respective process or waste stream, to form a gel. The gel then undergoes syneresis to remove water and soluble salts from the gel containing the particulates, thus, forming a silica monolith. The silica monolith is then sintered to form a hard, nonporous waste form.Type: GrantFiled: March 5, 1999Date of Patent: November 28, 2000Assignee: The United States of America as represented by the United States Department of EnergyInventors: David J. Chaiko, John P. Kopasz, Adam J. G. Ellison