Abstract:
Optical fiber composed of a glass doped with at least laser-active ions of an element from the rare earths. An optical fiber of glass, preferably a HMF glass, doped with Tm.sup.3+ is operated at 1.48 .mu.m as a fiber laser or amplifier on the laser transition .sup.3 F.sub.4 -.sup.3 H.sub.4. Since this thereby involves a self-saturating transition, the terminal level is emptied in accelerated fashion for a continuous wave mode by co-doping with de-activators, preferably Ho.sup.3+, Tb.sup.3+, Eu.sup.3+ and/or Pr.sup.3+ ions. The pump light wavelength can be selected from the wavelength range from 700 through 890 nm of GaAlAs emission. The optical fiber can be used in optical amplifiers or fiber amplifiers.
Abstract:
A novel method is proposed for the preparation of a transparent fused silica glass body co-doped with a rare earth element and aluminum each in a high uniformity of the dopant distribution. The method comprises the steps of: (a) flame-hydrolyzing a silicon compound and an aluminum compound in an oxyhydrogen flame to form a porous silicon oxide body containing aluminum; (b) soaking the porous body having a specified bulk density with a solution of a rare earth compound; (c) drying the solution-soaked porous body; and (d) sintering and vitrifying the dried porous body into a transparent glass body.
Abstract:
Fused quartz containing europium oxide, titanium dioxide and cerium oxide has been found to be effective for absorbing UV radiation while transmitting visible light radiation. Uses for this material include lamp envelopes and shrouds for halogen-incandescent lamps and metal halide arc discharge lamps which emit both UV and visible light radiation.
Abstract:
Provided is a wavelength conversion member that is less decreased in luminescence intensity with time by irradiation with light of an LED or LD and a light emitting device using the wavelength conversion member. A wavelength conversion member is formed of an inorganic phosphor dispersed in a glass matrix, wherein the glass matrix contains, in % by mole, 30 to 85% SiO2, 0 to 20% B2O3, 0 to 25% Al2O3, 0 to 3% Li2O, 0 to 3% Na2O, 0 to 3% K2O, 0 to 3% Li2O+Na2O+K2O, 0 to 35% MgO, 0 to 35% CaO, 0 to 35% SrO, 0 to 35% BaO, 0.1 to 45% MgO+CaO+SrO+BaO, and 0 to 4% ZnO, and the inorganic phosphor is at least one selected from the group consisting of an oxide phosphor, a nitride phosphor, an oxynitride phosphor, a chloride phosphor, an oxychloride phosphor, a halide phosphor, an aluminate phosphor, and a halophosphate phosphor.
Abstract:
A new class of nanostructured RE-doped SiO2-base materials that display superior fluorescence properties is provided. In particular, high gain combined with a broad and flat spectral band width is observed in material composed of a high fraction of a nano-dispersed metastable silicate phase in a glassy SiO2 matrix, produced by partial devitrification (crystallization) of several glassy Al2O3/Er2O3- and Y2O3/Er2O3-doped SiO2 compositions. Also, a highly deconvoluted spectral emission, with several prominent peaks, is observed in completely devitrified material, consisting of a uniform nano-dispersion of an equilibrium silicate phase in a crystobalite SiO2 matrix. Such enhanced fluorescence properties were observed in heat treated nanopowders prepared by vapor-phase, solgel, rapid solidification, and spray-pyrolysis methods.
Abstract translation:提供了一类新型的具有优异荧光性能的纳米结构的RE掺杂SiO 2基体材料。 特别地,在通过部分失透反应产生的玻璃状SiO 2基体中的高分数纳米分散的亚稳态硅酸盐相组成的材料中观察到具有宽的和平坦的光谱带宽的高增益( 几个玻璃状的Al 2 O 3 / O 2 O 3 - 和Y 2的结晶, O 3组成的二氧化硅组合物。 此外,在完全失透的材料中观察到具有几个突出的峰的高度去卷积的光谱发射,由平底硅酸盐相在均匀的SiO 2基体中的均匀的纳米分散体组成。 在通过气相,溶胶凝胶,快速凝固和喷雾热解方法制备的热处理纳米粉末中观察到这种增强的荧光性质。
Abstract:
Fused quartz containing europium oxide, titanium dioxide and cerium oxide has been found to be effective for absorbing UV radiation while transmitting visible light radiation. Uses for this material include lamp envelopes and shrouds for halogen-incandescent lamps and metal halide arc discharge lamps which emit both UV and visible light radiation.
Abstract:
Die Erfindung betrifft ein Verfahren zur Herstellung von dotiertem Quarzglas, das aus Quarzsand oder Bergkristall zusammen mit Zusatzstoffen erschmolzen wird, wobei als Zusatzstoff zumindest Neodymaluminat (NdAlO 3 ) zugesetzt wird.
Abstract:
An electric lamp provided with a light-transmitting lamp vessel (2) and a ligh source(l) in said light-transmitting lamp vessel(2) which is closed in a vacuum tight manner, wherein the light source has an envelope(3) of light-transmitting UV-absorbing quartz glass which contains aluminium in oxidic form and at least one metal in oxidic form selected from the group comprising cerium and europium wherein the quartz glass of the envelope(3) comprises silicon, cerium, europium and aluminium in oxidic form, while the atomic ratio aluminium/europium is in he range of 2:1 to 16:1 and whereby the titanium content of said quartz glass is at most >= 0 to An electric lamp provided with a light-transmitting lamp vessel and a light source in said light-transmitting lamp vessel which is closed in a vacuum-tight manner, wherein the light source has an envelope of light-transmiting, UV-absorbing quartz glass which contains aluminium in oxidic form and at least one metal in oxidic form selected from the group comprising cerium and europium, wherein the quartz glass of the envelope comprises silicon, cerium, europium and aluminium in oxidic form, while the atomic ratio aluminium/europium is in the range of 2:1 to 16:1 and whereby the titanium content of said quartz glass is at most >= 0 to = 0 to
Abstract:
Die Erfindung betrifft einen Glasartikel, beispielsweise ein Lampengefäß (116, 1), mit einer Glaszusammensetzung, die als Hauptkomponente Siliziumdioxid (SiO 2 ) und als Zusatzstoffe Neodym, Aluminium, Cer, Barium und Bor in Oxidform enthält, wobei der Anteil von Siliziumdioxid in der Glaszusammensetzung mindestens 90 Gewichtsprozent beträgt, der Anteil von Neodym in der Glaszusammensetzung im Bereich von 0,06 bis 1,40 Gewichtsprozent liegt, der Anteil von Aluminium in der Glaszusammensetzung im Bereich von 0,09 bis 1,20 Gewichtsprozent liegt, der Anteil von Cer in der Glaszusammensetzung im Bereich von 0,06 bis 1,30 Gewichtsprozent liegt, der Anteil von Barium in der Glaszusammensetzung im Bereich von 0,006 bis 1,30 Gewichtsprozent liegt, und der Anteil von Bor in der Glaszusammensetzung im Bereich von 0,0009 bis 0,20 Gewichtsprozent liegt.