Abstract: Methods of forming a glass tube are described. In one embodiment, the method includes heating a glass boule to a temperature above a glass transition temperature of the glass boule, drawing the glass tube from the glass boule in a vertically downward direction, and flowing a pressurized gas through a channel of the glass boule as the glass tube is drawn. The glass boule includes an outer surface defining an outer diameter of the glass boule and a channel extending through the glass boule defining an inner diameter of the glass boule. Drawing the glass tube decreases the outer diameter of the glass boule to an outer diameter of the glass tube and flowing the pressurized gas through the channel increases the inner diameter of the glass boule to an inner diameter of the glass tube. Glass boules, glass tubes, and apparatuses for making the same are also described.

Abstract: A glass container including a body having a delamination factor less than or equal to 10 and at least one marking is described. The body has an inner surface, an outer surface, and a wall thickness extending between the outer surface and the inner surface. The marking is located within the wall thickness. In particular, the marking is a portion of the body having a refractive index that differs from a refractive index of an unmarked portion of the body. Methods of forming the marking within the body are also described.

Abstract: Laser waveguides, methods and systems for forming a laser waveguide are provided. The waveguide includes an inner cladding layer surrounding a central axis and a glass core surrounding and located outside of the inner cladding layer. The glass core includes a laser-active material. The waveguide includes an outer cladding layer surrounding and located outside of the glass core. The inner cladding, outer cladding and/or core may surround a hollow central channel or bore and may be annular in shape.

Abstract: A multicore fiber is provided. The multicore fiber includes a plurality of cores spaced apart from one another, and a cladding surrounding the plurality of cores and defining a substantially rectangular or cross-sectional shape having four corners. Each corner has a radius of curvature of less than 1000 microns. The multicore fiber may be drawn from a preform in a circular draw furnace in which a ratio of a maximum cross-sectional dimension of the preform to an inside diameter of the preform to an inside diameter of the draw furnace is greater than 0.60. The multicore fiber may have maxima reference surface.

Abstract: A system and method for making a thin sintered silica sheet is provided. The method includes providing a soot deposition surface and forming a glass soot sheet by delivering a stream of glass soot particles from a soot generating device to the soot deposition surface. The method includes providing a sintering laser positioned to direct a laser beam onto the soot sheet and forming a sintered glass sheet from the glass soot sheet by delivering a laser beam from the sintering laser onto the glass soot sheet. The sintered glass sheet formed by the laser sintering system or method is thin, has low surfaces roughness and/or low contaminant levels. The system is also configured to produce a sheet having low degrees of warp and/or low fictive temperatures.

Abstract: Layered glass structures and fabrication methods are described. The methods include depositing soot on a dense glass substrate to form a composite structure and sintering the composite structure to form a layered glass structure. The dense glass substrate may be derived from an optical fiber preform that has been modified to include a planar surface. The composite structure may include one or more soot layers. The layered glass structure may be formed by combining multiple composite structures to form a stack, followed by sintering and fusing the stack. The layered glass structure may further be heated to softening and drawn to control linear dimensions. The layered glass structure or drawn layered glass structure may be configured as a planar waveguide.

Abstract: A high silica content substrate, such as for a device, is provided. The substrate has a high silica content and is thin. The substrate may include a surface with a topography or profile that facilitates bonding with a conductive metal layer, such as a metal layer for a circuit or antenna. The substrate may be flexible, have high temperature resistance, very low CTE, high strength and/or be non-reactive. The substrate may be suitable for use in circuits intended for use in high temperature environments, low temperature environments, reactive environments, or other harsh environments. The substrate may be suitable for high frequency antenna applications.

Abstract: A method of making an LED device and an LED device using a high-silica, fully-sintered glass substrate is provided. The high-silica substrate is at least 99% silica and is thin, such as less than 200 ?m in thickness. A phosphor containing layer is deposited on to the substrate and is laser sintered on the substrate such that a portion of the sintered phosphor layer embeds in the material of the substrate.

Abstract: A high silica content substrate, such as for a thin-film battery, is provided. The substrate has a high silica content, such as over 90% by weight silica, and is thin, for example less than 500 ?m. The substrate may include a surface with a topography or profile that facilitates bonding with a coating layer, such as a coating of an electrochemical battery material. The high silica content substrate may be flexible, have high temperature resistance, high strength and/or be non-reactive. The substrate may be suitable for use in the high temperature environments used in many chemical deposition or formation processes, such as electrochemical battery material formation processes.

Abstract: A multicore fiber is provided. The multicore fiber includes a plurality of cores spaced apart from one another, and a cladding surrounding the plurality of cores and defining a substantially rectangular or cross-sectional shape having four corners. Each corner has a radius of curvature of less than 1000 microns. The multicore fiber may be drawn from a preform in a circular draw furnace in which a ratio of a maximum cross-sectional dimension of the preform to an inside diameter of the preform to an inside diameter of the draw furnace is greater than 0.60. The multicore fiber may have maxima reference surface.

Abstract: Methods for manufacturing cables and cables assemblies include providing powder particles within a tube extruded about optical fiber. The particles may be accelerated so that as they strike the tube and mechanically attach to the tube.

Abstract: A high silica content substrate, such as for a thin-film battery, is provided. The substrate has a high silica content, such as over 90% by weight silica, and is thin, for example less than 500 ?m. The substrate may include a surface with a topography or profile that facilitates bonding with a coating layer, such as a coating of an electrochemical battery material. The high silica content substrate may be flexible, have high temperature resistance, high strength and/or be non-reactive. The substrate may be suitable for use in the high temperature environments used in many chemical deposition or formation processes, such as electrochemical battery material formation processes.

Abstract: A porous soot sheet is formed using a roll-to-roll glass soot deposition and sintering process. The soot sheet formation involves depositing glass soot particles on a deposition surface to form a supported soot layer, removing the soot layer from the deposition surface to form a soot sheet, and heating a portion of the soot sheet to locally-sinter the glass soot particles and form a porous soot part having a sintered peripheral edge.

Abstract: A system and method for making a thin sintered silica sheet is provided. The method includes providing a soot deposition surface and forming a glass soot sheet by delivering a stream of glass soot particles from a soot generating device to the soot deposition surface. The method includes providing a sintering laser positioned to direct a laser beam onto the soot sheet and forming a sintered glass sheet from the glass soot sheet by delivering a laser beam from the sintering laser onto the glass soot sheet. The sintered glass sheet formed by the laser sintering system or method is thin, has low surfaces roughness and/or low contaminant levels.

Abstract: A system and process for making a thin, soot particle or glass sheet is provided. The system includes a soot deposition plate having a deposition surface and a glass soot generating device spaced from the deposition surface along a first axis. The glass soot generating device is configured to generate glass soot particles and to deliver the glass soot particles through an outlet and on to the deposition surface in a layer having a thickness of less than 5 mm. At least one of the soot deposition plate and the glass soot generating device is movable to cause relative movement between the deposition surface of the soot deposition plate and the glass soot generating device. A thin soot or sintered soot sheet is also provided. The soot sheet has a variable surface topography that varies along at least two axes.

Abstract: An optical cable is provided. The optical cable includes a cable body having an outer surface and an inner surface defining a lumen and one or more optical transmission elements located within the lumen. The optical cable includes a groove array comprising a plurality of grooves located on the outer surface of the cable body. Each groove defines a trough having a lower surface located between peaks on either side of the trough, and the groove array includes an average groove spacing. The optical cable includes an ink layer applied to the cable body at the location of the groove array. The groove array and the ink layer are formed to limit abrasion experienced by the ink layer.

Abstract: A spool apparatus includes a first flange with a first layer of conformable material defining an inner face of the first flange and a second flange with a second layer of conformable material defining an inner face of the second flange. Methods are also provided where a first end winding of a first layer of windings is pressed into the inner face of the first flange such that the first layer of conformable material of the first flange conforms the inner face of the first flange into a shape of a circumferential surface portion of the first end winding.

Abstract: A glass sheet is formed using a roll-to-roll glass soot deposition and sintering process. The glass sheet formation involves forming a first glass soot layer on a deposition surface of a soot-receiving device, removing the first glass soot layer from the deposition surface, and forming a second glass soot layer on the unsupported first glass soot layer. The resulting composite glass soot sheet is heated to form a sintered glass sheet. The glass sheet can be a substantially homogeneous glass sheet or a composite glass sheet having layer-specific attributes.

Abstract: An optical cable is provided. The optical cable includes a cable body having an outer surface and an inner surface defining a lumen and one or more optical transmission elements located within the lumen. The optical cable includes a groove array comprising a plurality of grooves located on the outer surface of the cable body. Each groove defines a trough having a lower surface located between peaks on either side of the trough, and the groove array includes an average groove spacing. The optical cable includes an ink layer applied to the cable body at the location of the groove array. The groove array and the ink layer are formed to limit abrasion experienced by the ink layer.

Abstract: A method includes impregnating a region of a glass sheet with a filler material in a liquid state. The glass sheet includes a plurality of glass soot particles. The filler material is solidified subsequent to the impregnating step to form a glass/filler composite region of the glass sheet.