Abstract:
This invention relates to biocompatible and resorbable melt derived glass composition comprising: SiO 2 60-70 weight-%, Na 2 O 5-20 weight-%, CaO 5-25 weight-%, MgO 0-10 weight-%, P 2 O 5 0.5-5 weight-%, B 2 O 3 0-15 weight-%, Al 2 O 3 0-5 weight-%, Li 2 O 0-1 weight-%, and comprising less than 0.5 weight-% potassium. This invention also relates to biocompatible and resorbable glass fibres manufactured from the glass compositions of the invention. This invention further relates to medical devices comprising fibres of the invention. This invention still further relates to use of the compositions of the invention for the manufacture of glass fibre and use of the fibres of the invention for the manufacture of medical devices.
Abstract translation:本发明涉及生物相容性和可再吸收的熔体衍生玻璃组合物,其包含:SiO 2 60-70重量%,Na 2 O 5-20重量%,CaO 5-25重量%,MgO 0-10重量%,P 2 O 5 0.5-5重量%,B 2 O 3 0-15重量%,Al 2 O 3 0-5重量%,Li 2 O 0-1重量%,并且包含小于0.5重量%的钾 。 本发明还涉及由本发明的玻璃组合物制成的生物相容性和可再吸收的玻璃纤维。 本发明还涉及包含本发明的纤维的医疗装置。 本发明还涉及本发明的组合物用于制造玻璃纤维的用途,以及本发明的纤维用于制造医疗装置的用途。
Abstract:
A first step, in which P 2 O 5 -containing glass is deposited inside a silica glass pipe, and a second step, in which a Cl 2 -containing gas is introduced into the pipe and the P 2 O 5 -containing glass is dehydrated by heating the pipe, are repeated alternately A third step, in which glass that does not contain P 2 O 5 is deposited on the inside of the silica glass pipe, may further be provided such that the first step, the second step, and the third step are repeatedly performed in this order. A rare-earth-doped optical fiber, which has a attenuation of 15 dB/km or less at a wavelength of 1200 nm, comprises a core region and a cladding region enclosing the core region, wherein the core region includes phosphorus of 3 wt% or more, aluminum of 0.3 wt% or more, a rare-earth element of 500 wtppm or more, and chlorine of 0.03 wt% or more, and the cladding region has a refractive index that is lower than the refractive index of the core region.
Abstract translation:第一步骤,其中P 2个O 5含玻璃沉积在石英玻璃管内,以及第二步骤,其中为C1 2的气体被引入到管和P 2 O 5含玻璃是脱水 通过加热管,交替重复第三步骤,在该玻璃也不含P 2 O 5被沉积在石英玻璃管的内部,还可以设置检查做的第一步骤,第二步骤,和 第三步骤的顺序重复地执行。 的稀土类添加光纤,其具有在1200纳米的波长为15分贝/千米或更小的衰减,包括芯区和包围该纤芯区的覆层区,worin芯区域包括3重量%的磷 以上,0.3重量%以上的铝,500重量ppm以上,和12时03重量%或更多的氯,和包层区域的稀土类元素的折射率确实比芯区域的折射率低 ,
Abstract:
A method for manufacturing an optical fiber and the resulting article. The method including the steps of: providing a substrate tube; depositing high purity silica-based cladding layers on the inside of the tube; depositing a germanium-free core comprising a glass including silica, and oxides of Al, La, Er, and Tm; collapsing the substrate tube to form a preform; and drawing the preform to yield an optical fiber. A germanium-free co-doped silicate optical waveguide in accordance with the present invention includes a core material comprising silica, aluminum, lanthanum, erbium and thulium, wherein the concentration of Er is from 15 ppm to 3000 ppm; Al is from 0.5 mol% to 15 mol%; La is less than 2 mol%; and Tm is from 150 ppm to 10000 ppm. In an exemplary specific embodiment the concentration of Al is from 4 mol% to 10 mol%; and the concentration of Tm is from 150 ppm to 3000 ppm. The core may further include F. In an exemplary embodiment, the concentration of F is less than or equal to 6 mol%. The waveguide may be an optical fiber, a shaped fiber or other light-guiding waveguides. An amplifier according to the present invention includes the optical fiber described above.
Abstract:
A synthetic quartz powder obtained by calcining a powder of silica gel, characterized in that white devitrification spots having sizes of larger than 20 µm in diameter formed in an ingot obtained by vacuum melting the synthetic quartz powder at a temperature of from 1780 to 1800°C to form an ingot, followed by maintaining the ingot at a temperature of 1630°C for 5 hours, are at most 10 spots/50 g.
Abstract:
This invention relates to the production of high purity fused silica glass through oxidation and/or flame hydrolysis of a halide-free, organosilicon-R compound in vapor form having the following properties: (a) producing a gas stream of a halide-free silicon-containing compound in vapor form capable of being converted through thermal decomposition with oxidation or flame hydrolysis to SiO₂; (b) passing said gas stream into the flame of a combustion burner to form amorphous particles of fused SiO₂; (c) depositing said amorphous particles onto a support; and (d) either essentially simultaneously with said deposition or subsequently thereto consolidating said deposit of amorphous particles into a virtually nonporous body; the improvement comprising utilizing a halide-free, organosilicon-R compound in vapor form having the following properties: (1) a Si-R bond dissociation energy that is no higher than the dissociation energy of the Si-O bond; (2) a boiling point no higher than 350°C; and (3) which, upon pyrolysis and/or hydrolysis, will produce decomposition products beside SiO₂ which are deemed to be environmentally safe or the emissions are below acceptable governmental standards.
Abstract:
The present invention relates to a large-core optical fiber and a large-core optical fiber system, wherein the optical fiber comprises of a core having a core raidius ρ and a core index of refraction n core ; a first cladding disposed about said core, said first cladding having an outer radius ρ 1 and an index of refraction n cl , said core and said first cladding having a difference in index of refraction Δn = n core - n cl , and a numerical aperture (NA) less than about 0.05, said NA determined by n core and n cl ; and a second cladding disposed about said first cladding, said first cladding and said second cladding having a difference in index of refraction Δn 1 , wherein the first cladding radius ρ 1 is greater than about 1.1 ρ and less than about 2 ρ and the refractive index difference between said first cladding and said second cladding, Δn 1 , is greater than about 1.5 Δn and less than about 50 Δn. The optical fiber system for providing optical amplification consists of the large-core optical fiber, wherein said core of said large-core fiber is doped with one or more types of rare earth ions, said large-core optical fiber comprising of a combined waveguide formed by said core and said first cladding layer; an optical pump optically coupled to said large-core optical fiber; and an optical source optically coupled to an input of said large-core optical fiber.