Patent application number | Description | Published |
20080287278 | LOW LOSS CHALCOGENIDE GLASS AND PROCESS FOR MAKING SAME USING ARSENIC MONOCHALCOGENIDE - This invention pertains to a chalcogenide glass of low optical loss that can be on the order of 30 dB/km or lower, and to a process for preparing the chalcogenide glass. The process includes the steps of optionally preparing arsenic monochalcogenide precursor or the precursor can be provided beforehand; dynamically distilling the precursor in an open system under vacuum from a hot section to a cold section to purify same; homogenizing the precursor in a closed system so that it is of a uniform color; disposing the distilled or purified precursor and at least one chalcogenide element at a hot section of an open distillation system; dynamically distilling under vacuum in an open system so that the precursor and the at least one chalcogenide element are deposited at a cold section of the open system in a more purified state; homogenizing the precursor and the at least chalcogenide element in a closed system while converting the precursor and the at least one chalcogenide element from crystalline phase to glassy phase. | 11-20-2008 |
20090220790 | Spinel Nanopowders - Disclosed is a method of producing a spinel powder comprising preparing a double-hydroxide precursor precipitate then treating the precipitate with a washing agent, wherein said washing agent replaces water in said precipitate, then drying the precipitate to produce a hydroxide powder. The hydroxide powder is calcinated to produce an spinel powder that is essentially free of agglomeration. | 09-03-2009 |
20100022378 | MANUFACTURING PROCESS FOR CHALCOGENIDE GLASSES - The present invention is generally directed to a method of making chalcogenide glasses including holding the melt in a vertical furnace to promote homogenization and mixing; slow cooling the melt at less than 10° C. per minute; and sequentially quenching the melt from the top down in a controlled manner. Additionally, the present invention provides for the materials produced by such method. The present invention is also directed to a process for removing oxygen and hydrogen impurities from chalcogenide glass components using dynamic distillation. | 01-28-2010 |
20100064731 | Thermally Stable IR-Transmitting Chalcogenide Glass - A thermally stable chalcogenide glass, a process for making the same, and an optical fiber drawn therefrom are provided. A chalcogenide glass having the composition Ge | 03-18-2010 |
20100067862 | THERMALLY STABLE IR TRANSMITTING CHALCOGENIDE GLASS - A thermally stable chalcogenide glass, a process for making the same, and an optical fiber drawn therefrom are provided. A chalcogenide glass having the composition Ge | 03-18-2010 |
20100072465 | BARIUM COPPER SULFUR FLUORIDE TRANSPARENT CONDUCTIVE THIN FILMS AND BULK MATERIAL - The present invention is generally directed to a bulk barium copper sulfur fluoride (BCSF) material made by combining Cu | 03-25-2010 |
20100080252 | OPO MID-IR WAVELENGTH CONVERTER - A wavelength converter comprising an arsenic sulfide (As—S) chalcogenide glass fiber coupled to an optical parametric oscillator (OPO) crystal and a laser system using an OPO crystal coupled to an As—S fiber are provided. The OPO receives pump laser radiation from a pump laser and emits laser radiation at a wavelength that is longer than the pump laser radiation. The laser radiation that is emitted from the OPO is input into the As—S fiber, which in turn converts the input wavelength from the OPO to a desired wavelength, for example, a wavelength beyond about 4.4 μm. In an exemplary embodiment, the OPO comprises a periodically poled lithium niobate (PPLN) crystal. The As—S fiber can include any suitable type of optical fiber, such as a conventional core clad fiber, a photonic crystal fiber, or a microstructured fiber. | 04-01-2010 |
20100108886 | Method and apparatus for infrared spectrometry - A Fourier-Transform Infrared (FTIR) spectrometer for operation in the mid- and long-wave infrared region (about 2-15 micron wavelengths) is disclosed. The FTIR spectrometer is composed of IR-transmitting fiber and uses a broadband IR source. A fiber stretcher is provided to provide a path difference between a first path and a second path having a sample associated therewith. Stretching of the fiber provides a path difference sufficient to generate an interferogram that can subsequently be analyzed to obtain information about a sample. A method for use of the apparatus of the invention is also disclosed. The method involves stretching of an IR-transmitting fiber to create a path difference sufficient to generate an interferogram. Various aspects of these features enable the construction of compact, portable spectrometers. | 05-06-2010 |
20100126219 | Process of Making Low Loss Visible - IR Transmitting Glass - Ceramic Spinel Composites - This invention pertains to a process of bonding a magnesium aluminate spinel article or articles and a germanate glass article or articles including the step of heating them together above the softening temperature of the glass. | 05-27-2010 |
20100155678 | Hot-Pressed Transparent Ceramics and Ceramic Lasers - A transparent polycrystalline ceramic having scattering and absorption loss less than 0.2/cm over a region comprising more than 95% of the originally densified shape and further provides a process for fabricating the same by hot pressing. The ceramic can be any suitable ceramic such as yttria (Y | 06-24-2010 |
20100160144 | Yb:Y2O3 Ceramic Powders - A high purity nano-sized Yb | 06-24-2010 |
20100202743 | PHOTONIC BAND GAP GERMANATE GLASS FIBERS - A photonic band gap fiber and method of making thereof is provided. The fiber is made of a germanate glass comprising at least 30 mol % of a germanium oxide and has a longitudinal central opening, a microstructured region having a plurality of longitudinal surrounding openings, and a jacket. The air fill fraction of the microstructured region is at least about 90%. The fiber may be made by drawing a preform into a fiber, while applying gas pressure to the microstructured region. The air fill fraction of the microstructured region is changed during the drawing. | 08-12-2010 |
20100238957 | OPO Laser Mid-IR Wavelength Converter - A wavelength converter comprising an arsenic sulfide (As—S) chalcogenide glass fiber coupled to an optical parametric oscillator (OPO) crystal and a laser system using an OPO crystal coupled to an As—S fiber are provided. The OPO receives pump laser radiation from a pump laser and emits laser radiation at a wavelength that is longer than the pump laser radiation. The laser radiation that is emitted from the OPO is input into the As—S fiber, which in turn converts the input wavelength from the OPO to a desired wavelength, for example, a wavelength beyond about 4.4 μm. In an exemplary embodiment, the OPO comprises a periodically poled lithium niobate (PPLN) crystal. The As—S fiber can include any suitable type of optical fiber, such as a conventional core clad fiber, a photonic crystal fiber, or a microstructured fiber. | 09-23-2010 |
20100244652 | Glass for IR Signature Reduction - A doped glass composition is provided. A base glass is doped with rare earth ions Terbium Tb | 09-30-2010 |
20100271719 | ULTRA BROAD BAND BEAM STEERING APPARATUS AND METHOD USING CHALCOGENIDE-BASED RISLEY COMBINATION-PRISM PAIR - Beam steering apparatus is presented having a Risley double-prism pair with first and second double-prisms disposed along an optical path, where one or more of the prisms are made from a chalcogenide glass material. | 10-28-2010 |
20100303429 | Microstructured Optical Fiber Draw Method with In-Situ Vacuum Assisted Preform Consolidation - A method and apparatus for making a substantially void-free microstructured optical fiber using a one-step process is provided. A preform for the optical fiber is prepared, comprising an outer jacket made of solid glass, a cladding having a plurality of microtubes and/or microcanes arranged in a desired pattern within the jacket, and a core which may be solid or hollow, with the cladding and the core extending above the top of the outer jacket. The thus-prepared preform is placed into a fiber draw tower. As the fiber is drawn, negative gas pressure is applied to draw the canes together and consolidate the interfacial voids between the canes while positive gas pressure is applied to the preform to keep the holes of the microcanes open during the fiber drawing. The apparatus includes a jig having support tubes that are connected to a vacuum pump for application of the negative gas pressure and a vent tube connected to a gas supply for application of the positive gas pressure. The interfaces between the support tube and the outer jacket and between the vent tube and the cladding are sealed to ensure that the appropriate application of negative or positive pressure during the draw step is obtained. The preforms according to the present invention can include one or more components fabricated from specialty non-silica glass. | 12-02-2010 |
20100326136 | Thermally Stable IR-Transmitting Chalcogenide Glass - A thermally stable chalcogenide glass, a process for making the same, and an optical fiber drawn therefrom are provided. A chalcogenide glass having the composition Ge | 12-30-2010 |
20110002585 | FIBER-BASED MID-IR SIGNAL COMBINER AND METHOD OF MAKING SAME - The present invention is generally directed to a device comprising multiple specialty glass optical fibers that combines several different mid-infrared optical signals from multiple optical fibers into one signal in a single optical fiber. In addition, the present invention provides for a method of making the device. | 01-06-2011 |
20110028303 | MAGNESIUM ALUMINATE TRANSPARENT CERAMIC HAVING LOW SCATTERING AND ABSORPTION LOSS - A ceramic having at least about 90% by weight magnesium aluminate and having a bulk scattering and absorption loss of less than about 1/cm at any wavelength in a range of about 0.23 to about 5.3 microns or 0.2/cm at any wavelength in a range of about 0.27 to about 4.5 microns. A method of making a ceramic by providing a plurality of particles having a magnesium aluminate core and a fluoride salt coating; heating the particles in an oxidizing atmosphere to a temperature in the range of about 400° C. to about 750° C.; and sintering the particles to form a solid ceramic. | 02-03-2011 |
20110033156 | Microstructured Fiber End - An optical fiber having microstructured terminal end suitable for reducing Fresnel losses. In an exemplary embodiment, the microstructured surface includes a plurality of protrusions, recesses or combinations thereof that effectively and incrementally change the refractive index of the terminal end of the optical fiber such that the refractive index is gradually drawn closer to the refractive index value of the surrounding environmental medium. | 02-10-2011 |
20110034319 | Sintering Aid Coated YAG Powders and Agglomerates and Methods for Making - Particles including a YAG core and a coating of sintering aid deposited thereon. The particles and agglomerates thereof maybe formed as a powder. The coated YAG-containing particles are well-suited to production of polycrystalline YAG-containing ceramics. The coated YAG-containing particles may be fabricated using a novel fabrication method which avoids the need for formation of a homogeneous powder mixture of YAG and sintering aid. In the method, a solution including a sintering aid or sintering aid precursor is prepared and mixed with YAG-containing particles to form a mixture. The mixture may be sprayed into a drying column and dried to produce coated particles. Alternatively, the YAG particles and sintering aid or sintering aid precursor solution may be separately introduced to the drying column and dried to form coated YAG-containing particles. | 02-10-2011 |
20110038587 | MULTI-CLAD OPTICAL FIBER - A chalcogenide multi-clad optical fiber having a core, a first cladding and one or more subsequent claddings including a chalcogenide glass. The optical fiber may be capable of transmitting visible and inferred light and may be used for a wide variety of semiconductor applications. | 02-17-2011 |
20110067757 | COPPER INDIUM GALLIUM SELENIDE (CIGS) THIN FILMS WITH COMPOSITION CONTROLLED BY CO-SPUTTERING - A method and apparatus for forming a thin film of a copper indium gallium selenide (CIGS)-type material are disclosed. The method includes providing first and second targets in a common sputtering chamber. The first target includes a source of CIGS material, such as an approximately stoichiometric polycrystalline CIGS material, and the second target includes a chalcogen, such as selenium, sulfur, tellurium, or a combination of these elements. The second target provides an excess of chalcogen in the chamber. This can compensate, at least in part, for the loss of chalcogen from the CIGS-source in the first target, resulting in a thin film with a controlled stoichiometry which provides effective light absorption when used in a solar cell. | 03-24-2011 |
20110067997 | SYNTHESIS OF HIGH-PURITY BULK COPPER INDIUM GALLIUM SELENIDE MATERIALS - A method for forming a high purity, copper indium gallium selenide (CIGS) bulk material is disclosed. The method includes sealing precursor materials for forming the bulk material in a reaction vessel. The precursor materials include copper, at least one chalcogen selected from selenium, sulfur, and tellurium, and at least one element from group IIIA of the periodic table, which may be selected from gallium, indium, and aluminum. The sealed reaction vessel is heated to a temperature at which the precursor materials react to form the bulk material. The bulk material is cooled in the vessel to a temperature below the solidification temperature of the bulk material and opened to release the formed bulk material. A sputtering target formed by the method can have an oxygen content of 10 ppm by weight, or less. | 03-24-2011 |
20110100548 | Functionally Doped Polycrystalline Ceramic Laser Materials - A functionally doped polycrystalline ceramic laser medium and method of making thereof are provided. The medium includes a solid state polycrystalline Ytterbium doped Yttria or Scandia (Yb:Y | 05-05-2011 |
20110104491 | Functionally Doped Polycrystalline Ceramic Laser Materials - A functionally doped polycrystalline ceramic laser medium and method of making thereof are provided. The medium includes a solid state polycrystalline Ytterbium doped Yttria or Scandia (Yb:Y | 05-05-2011 |
20110174989 | CALCIUM LANTHANOID SULFIDE POWDERS, METHODS OF MAKING, AND CERAMIC BODIES FORMED THEREFROM - A method of preparing a fine powder of calcium lanthanoid sulfide is disclosed. The method includes spraying soluble calcium and lanthanoid salts into at least one precipitating solution to form a precipitate comprising insoluble calcium and lanthanoid salts, optionally, oxidizing the precipitate comprising insoluble calcium and lanthanoid salts, and sulfurizing the optionally oxidized precipitate to form a fine powder of calcium lanthanoid sulfide. An alternative method for forming the powder is by flame pyrolysis. The calcium lanthanoid sulfide powder produced by either method can have an impurity concentration of less than 100 ppm, a carbon concentration of less than 200 ppm, a BET surface area of at least 50 m | 07-21-2011 |
20120141079 | PHOTONIC BAND GAP FIBERS USING A JACKET WITH A DEPRESSED SOFTENING TEMPERATURE - The present invention is generally directed to a photonic bad gap fiber and/or fiber preform with a central structured region comprising a first non-silica based glass and a jacket comprising a second non-silica based glass surrounding the central structured region, where the Littleton softening temperature of the second glass is at least one but no more than ten degrees Celsius lower than the Littleton softening temperature of the first glass, or where the base ten logarithm of the glass viscosity in poise of the second glass is at least 0.01 but no more than 2 lower than the base ten logarithm of the glass viscosity in poise of the first glass at a fiber draw temperature. Also disclosed is a method of making a photonic bad gap fiber and/or fiber preform. | 06-07-2012 |
20120141080 | HEXAGONAL TUBE STACKING METHOD FOR THE FABRICATION OF HOLLOW CORE PHOTONIC BAND GAP FIBERS AND PREFORMS - The present invention is generally directed to a method of making a hollow-core photonic band gap preform from a specialty glass by pressing a specialty glass through a die to form a tube wherein the outer transverse shape of the tube is a hexagon, triangle, quadrilateral, or other polygon; stretching the tube to form a micro-tube with approximately the same outer transverse shape as the tube; stacking a plurality of micro-tubes into a bundle minimizing voids between adjacent micro-tubes and forming a central longitudinal void wherein the plurality of micro-tubes within the bundle comprise an inner structured region of the preform and the central void of the bundle comprises a hollow core in the preform; and inserting the bundle into a jacket tube. Also disclosed are the hollow-core photonic band gap preform and fiber formed by this method. | 06-07-2012 |
20120196105 | Spinel Ceramics Via Edge Bonding - Disclosed herein is a method for making transparent ceramic spinel windows, domes and other complex shapes via edge bonding. | 08-02-2012 |
20120238432 | MANUFACTURING PROCESS FOR CHALCOGENIDE GLASSES - The present invention is generally directed to a method of making chalcogenide glasses including holding the melt in a vertical furnace to promote homogenization and mixing; slow cooling the melt at less than 10° C. per minute; and sequentially quenching the melt from the top down in a controlled manner. Additionally, the present invention provides for the materials produced by such method. The present invention is also directed to a process for removing oxygen and hydrogen impurities from chalcogenide glass components using dynamic distillation. | 09-20-2012 |
20130083812 | MID-IR FIBER LASER APPARTUS - A laser apparatus uses a dysprosium doped chalcogenide glass fiber. The glass fiber has a laser pump operatively connected to it. The chalcogenide glass fiber is located in a laser cavity including one or more reflective elements such as a Bragg grating, a Bragg minor, a grating, and a non-doped fiber end face. The apparatus provides laser light output at a wavelength of about 4.3 μm to about 5.0 μm at a useful power level using laser light input at a wavelength of from about 1.7 μm to about 1.8 μm. Also disclosed is a method for providing laser light output at a wavelength of about 4.3 μm to about 5.0 μm using the apparatus of the invention. | 04-04-2013 |