Abstract:
Die Erfindung betrifft ein Verfahren zur Herstellung eines dotierten SiO 2 - Schlickers indem eine SiO 2 -Suspension mit mindestens einer Dotierlösung in Wechselwirkung gebracht wird, wobei die SiO 2 -Suspension oder/und die Dotierlösung als Sprühnebel aufeinander einwirken, dessen mittlerer Tropfendurchmesser im Bereich zwischen 10 μm und 100 μm liegt. Die Erfindung betrifft weiterhin die Verwendung eines mittels des Sprühnebelverfahrens dotierten SiO 2 -Schlickers zur Herstellung von dotiertem Quarzglas, insbesondere zur Herstellung von laseraktivem Quarzglas.
Abstract:
La présente invention concerne un procédé de fabrication d'une fibre optique (18) comprenant les étapes suivantes : on réalise une préforme (10) contenant des nanoparticules munies d'un élément actif comprenant au moins un évidemment (14) au voisinage d'une partie au moins des nanoparticules ; on effectue le fibrage de la préforme (10) en introduisant un gaz (11) non-oxydant dans l'évidemment (14), limitant ainsi les risques d'oxydations des nanoparticules de la préforme (10). La préforme (10) destinée à la fabrication d'une fibre optique (18) par le procédé selon l'invention comprend des nanoparticules munies d'un élément actif dans une zone dopée (12) et au moins un évidement (14) au voisinage de la zone dopée (12).
Abstract:
The present invention relates to a moldable nanocomposite for producing a transparent article made of multicomponent fused silica glass, the moldable nanocomposite comprising: an organic binder; and a fused silica glass powder dispersed in the organic binder, the fused silica glass powder comprising fused silica glass particles having a diameter in the range from 5 nm to 500 nm, wherein the fused silica glass powder is pre-modified with a dopant and/or wherein at least one non-crystalline modifying agent is contained in the moldable nanocomposite and one or more dopant reagents selected from organoelement compounds, metal complexes and salts are contained in the moldable nanocomposite as the at least one non-crystalline modifying agent, and wherein the content of the fused silica glass powder in the moldable nanocomposite is at least 5 parts per volume based on 100 parts per volume of the organic binder. Further, the present invention relates to a method of producing a transparent article made of multicomponent fused silica glass.
Abstract:
A glass composite for use in Extreme Ultra-Violet Lithography (EUVL) is provided. The glass composite includes a first silica-titania glass section. The glass composite further includes a second doped silica-titania glass section mechanically bonded to a surface of the first silica-titania glass section, wherein the second doped silica-titania glass section has a thickness of greater than about 1.0 inch.
Abstract:
An optical fiber containing an alkali metal and capable of reducing Rayleigh scattering loss is provided. An optical fiber has a core and a cladding made of silica glass and enclosing the core. The cladding contains fluorine and has a refractive index lower than the refractive index of the core. The core contains first group dopants selected from the group of Na element, K element, or a compound thereof at an average concentration of 0.2 ppm or more and 10 ppm or less. The core also contains second group dopants for reducing the viscosity of silica glass and having a diffusion coefficient of 1×10−12 cm2/s or more and smaller than the diffusion coefficient of the first group dopants, by an average concentration of 0.2 ppm or more at a temperature of 2000° C. to 2300° C.
Abstract:
A blank made of titanium-doped silica glass for a mirror substrate for use in EUV lithography is provided. The blank includes a surface portion to be provided with a reflective film and having an optically used area (CA) over which a coefficient of thermal expansion (CTE) has a two-dimensional inhomogeneity (dCTE) distribution profile averaged over a thickness of the blank. A maximum inhomogeneity (dCTEmax) of less than 5 ppb/K is defined as a difference between a CTE maximum value and a CTE minimum value. The dCTEmax is at least 0.5 ppb/K. The CA forms a non-circular area having a centroid. The dCTE distribution profile is not rotation-symmetrical and is defined over the CA, such that straight profile sections normalized to a unit length and extending through the centroid of the area yield a dCTE family of curves forming a curve band with a bandwidth of less than 0.5×dCTEmax.
Abstract:
The invention concerns a method for making an optical fiber (18) including the following steps: producing a preform (10) containing nanoparticles provided with an active element including at least one recess (14) proximate at least part of the nanoparticles; fiber drawing of the preform (10) by introducing a non-oxidizing gas in the recess (14), thereby limiting the risks of oxidizing the nanoparticles of the preform (10). The preform (10) designed to the manufacture of an optical fiber (18) by the inventive method comprises nanoparticles provided with an active element in a doped zone (12) and at least one recess (14) proximate the doped zone (12).
Abstract:
An apparatus and process for making glass soot sheet and sintered glass sheet. Glass soot particles are deposited on a curved deposition surface of a rotating drum to form a soot sheet. The soot sheet is then released from the deposition surface. The soot sheet can be sintered into a consolidated glass. The soot sheet and the sintered glass can be sufficiently long and flexible to be reeled into a roll.
Abstract:
The invention is directed to the production of optical fibers from optical fiber preforms using flow physics. The present methods provide for the nulldrawingnull of an optical fiber preform using focusing of the preform by a surrounding fluid, e.g. a heated gas.