Abstract:
PURPOSE: An optical fiber for an optical attenuator having a flat attenuation gain is provided, which has a flat attenuation characteristics at an optical signal band by doping a pair of metal ions having light absorption yields of a negative slope and a positive slope into a core of the optical fiber. CONSTITUTION: An optical fiber comprises a cladding layer(12) and a core layer(13). At least more than one component among the first metal ions of Fe, Cr and Mn, whose light absorption characteristics is decreased in a fixed wavelength band, and the second metal ion of a Cobalt(Co) component, whose light absorption characteristics is increased in the fixed wavelength band, are co-doped to the core layer. The second metal ion is formed by mixing a Ni component to the Co component. And an Al component also is co-doped to the core layer.
Abstract:
PURPOSE: An amplifying optical fiber and a method for manufacturing the same are provided to maximize the efficiency of a gain media which is doped with rare earth element. CONSTITUTION: An amplifying optical fiber includes a center core and an optical cladding which surrounds the center core. The center core is based on silica matrix including nano particles. Nano particles are composed of a matrix material which includes at least one doping ions of rare earth elements.
Abstract:
본 발명에 따른 광섬유 모재는 원형 튜브 형태의 석영관과, 상기 석영관의 내주면 상에 적층되며 상기 광섬유 모재의 내부로 침투하는 수산화기를 차단하기 위한 제1 차단층과, 상기 제1 차단층의 내주면 상에 적층되며 상기 제1 차단층보다 높은 침투 계수를 갖는 제2 차단층과, 상기 제2 차단층의 내주면에 적층되며 상기 제2 차단층 보다 낮은 침투 계수를 갖는 제3 차단층과, 상기 광섬유 모재의 중심에 위치하는 코아층과, 상기 제3 차단층과 상기 코아층의 사이에 위치된 클래드층을 포함한다.
Abstract:
A method of forming a doped silica-titania glass is provided. The method includes blending batch materials comprising silica, titania, and at least one dopant. The method also includes heating the batch materials to form a glass melt. The method further includes consolidating the glass melt to form a glass article, and annealing the glass article.
Abstract:
Ultralow expansion titania-silica glass. The glass has high hydroxyl content and optionally include one or more dopants. Representative optional dopants include boron, alkali elements, alkaline earth elements or metals such as Nb, Ta, Al, Mn, Sn Cu and Sn. The glass is prepared by a process that includes steam consolidation to increase the hydroxyl content. The high hydroxyl content or combination of dopant(s) and high hydroxyl content lowers the fictive temperature of the glass to provide a glass having a very low coefficient of thermal expansion (CTE), low fictive temperature (T f ), and low expansivity slope.
Abstract:
One exemplary embodiment of this disclosure relates to a transfer molding assembly. The assembly includes a die having a molding cavity interconnected with a reservoir. The assembly further includes a heater operable to heat the die, and a load plate configured to move under its own weight to transfer material from the reservoir into the molding cavity.
Abstract:
L'invention concerne une fibre optique (100) pour la détection et/ou la mesure quantitative d'hydrogène comportant un cœur (110) de fibre et au moins une gaine optique (120) entourant le cœur (110), au moins l'un parmi le cœur (110) et la gaine optique (120) étant réalisé majoritairement en verre de silice. La fibre optique (100) comporte du palladium sous forme métallique inclus dans au moins une partie de fibre réalisée majoritairement en verre de silice sélectionnée parmi le cœur (110) et la gaine optique (120). L'invention concerne également un procédé de fabrication d'une telle fibre optique (100), une utilisation de cette fibre optique (100), et un système de détection et/ou de mesure quantitative d'hydrogène comportant une telle fibre optique (100).