Abstract:
The present invention relates to a glass article for use as an optical waveguide fiber (1), the core (4) of which is doped with a chalcogenide element to significantly increase the refractive index of the core (4). The subject of this invention is novel doped silica core composition 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 coefficient of expansion, high optical transparency and appropriate viscosity and softening points to make them ideal candidates for use as optical waveguide fibers.
Abstract:
L'invention se rapporte à un guide d'onde optique, en particulier une fibre optique comprenant un coeur, formé d'un matériau à base de silice dopé avec des ions de terres rares, recouvert d'une gaine optique. Des nanoparticules, dont au moins une partie est en métal, sont dispersées dans le matériau, du coeur. Des dispositifs optiques, tels que notamment des amplificateurs optiques, comportent une fibre optique comprenant unit coeur formé d'un matériau à base de silice dopé avec des ions de terres rares recouvert d'une gaine optique, des nanoparticules, dont au moins une partie est en métal, étant dispersée dans le matériau du coeur, et une source de pompage délivrant un rayonnement électromagnétique d'excitation se propageant dans le coeur.
Abstract:
The present invention is directed to a fluorinated rare earth doped glass composition and method for making a glass-ceramic optical article therefrom, e.g. optical fiber waveguides, fiber lasers and active fiber amplifiers, having application in the 1300 nm and 1550 nm telecommunications windows. The inventive compositions include Pr3+ and/or Dy3+ in a concentration range of between 300 - 2,000 ppmw and Ag+ in a concentration range of between 500 - 2,000 ppmw; or Er3+ in a concentration range of between 500 - 5,000 ppmw and Ag+ in a concentration range of between 0 - 2,000 ppmw. The monovalent silver ion provides an ionic charge balanced glass-ceramic crystal. These compositions exhibit reduced or absent rare earth ion clustering and fluorescence quenching effects in the presence of high concentrations of rare earth ion dopants.
Abstract:
Die Erfindung betrifft ein Verfahren zur Herstellung von optischen Gläsern und Farbgläsern mit Hilfe eines Flüssigphasensinterprozesses aus einem Ausgangsmaterial umfassend wenigstens SiO 2 -Pulver sowie Zusatzstoffe zur Reduzierung der Temperatur des Sinter- und/oder Schmelzprozesses umfassend die nachfolgenden Schritte:
die Ausgangsmaterialien werden in einem flüssigen Medium soweit hierin löslich gelöst und soweit hierin nicht löslich dispergiert ergebend eine Suspension aus dem gelösten und dispergierten Ausgangsmaterial wird einGrünkörper hergestellt der Grünkörper wird getrocknet der getrocknete Grünkörper wird bei Temperaturen geringer als 1200° C, insbesondere im Temperaturbereich von 600° C bis 1200° C flüssigphasengesintert.
Abstract:
A kink-resistant hose construction (10) adapted for conveying fluids under high pressure which is flexible intermediate a central longitudinal axis (12) to a minimum bend radius. The construction includes a thermoplastic core (14) having an inner surface (16) defining the inner diameter of the hose and an outer surface (18), and an innermost reinforcement layer (20) is formed as a composite of at least one metallic wire element and at least one non-metallic fibre element. The metallic wire element is wound helically in one direction over the outer surface of the core a predetermined pitch angle measured relative to the longitudinal axis to define a series first turns. Each of these first tuns is spaced-apart from an adjacent first turn to define successive pairs of first turns each having an interstitial area therebetween. The fiber element, in turn, is wound helically over the outer surface of the core in the same direction and at the same pitch angle as the metallic wire element to define a series of second turns each disposed intermediate a corresponding one of the pairs of the first turns or the wire element. The fiber element substantially occupies the interstitial area between each of the pairs of the first turns of the wire element to thereby prevent the wall of the core from being extruded therebetween as the hose is flexed to its minimum bend radius.
Abstract:
A laser processing method for removing glass by melting, evaporation or ablation from sheet-like glass substrate for forming microscopic concavities. Diffraction grating and planar microlens array obtained thereby.
Abstract:
A laser processing method for removing glass by melting, evaporation or oblation from sheet-like glass substrate for forming microscopic concavities and convexities. Diffraction grating and planar microlens array obtained thereby.
Abstract:
The invention relates to a method for producing a silica glass body, comprising the method steps: i.) providing silicon dioxide granules from a silicon dioxide powder produced pyrogenically, ii.) forming a glass melt from said silicon dioxide granules, and iii.) forming a silica glass body from at least one portion of the glass melt, wherein in at least one of the method steps a silicon component that is different from silicon dioxide is added. The invention also relates to a silica glass body that can be obtained by this method. In addition, the invention relates to a light guide, a lighting means and a shaped body, each of which can be obtained by subsequent processing of the silica glass body.
Abstract:
A near-net or net shape fused silica glass article, such as a radome. The article is formed by depositing silica soot onto a mandrel having a shape that corresponds to the shape of the fused silica glass article. In some embodiments, the mandrel is inductively heated to a temperature that is sufficient to consolidate or sinter the silica soot upon deposition onto the mandrel to form fused silica glass. The fused silica glass article may have an outer layer that is under compression and/or multiple layers comprising various dopants that can alter or affect physical, mechanical, electrical, and/or optical properties.