Abstract:
Process for producing a sintered granular material containing silicon dioxide and having a BET surface area of less than 1 m 2 g and a proportion of impurities of less than 50 ppm, in which a mixture which contains silicon dioxide powder and a metal compound is intensively mixed in an atmosphere having a relative atmospheric humidity of from 1.0 to 100% at temperatures of from 0 to 50°C by means of a dispersing apparatus, the crumbly mass is divided into pieces, subsequently dried, purified 'and sintered. The moisture content of the silicon dioxide powder and/or the atmospheric humidity are/is at least sufficient to hydrolyse the metal compound completely.
Abstract:
A method for manufacturing an optical fiber, the method including the steps of providing a substrate tube; depositing a boron-free cladding layer; depositing a core comprising a glass including silica, and oxides of Al, Ge, Er, and Tm; collapsing the substrate tube to form a preform; and drawing the preform to yield optical fiber. A co-doped silicate optical waveguide having a core including silica, aluminum, germanium, erbium and thulium. The composition concentrations are: Er from 15 ppm to 3000 ppm; Al from 0.5 mol% to 12 mol%; Tm from 15 ppm to 10000 ppm; and Ge from 1 mol% to 20 mol%. In a specific embodiment, the concentration of Er is from 150 ppm to 1500 ppm; Al is from 2 mol% to 8 mol%; and Tm is from 15 ppm to 3000 ppm.
Abstract:
An optical waveguide including a core having silica, Al, a non-fluorescent rare-earth ion, Ge, Er, and Tm. The non-fluorescent rare-earth ion may be La. Exemplary compositions concentrations are Er is from 15 ppm to 3000 ppm, Al is from 0.5 mol% to 12 mol%, La is less than or equal to 2 mol%, Tm is from 15 ppm to 10,000 ppm; and the Ge is less than or equal to 15 mol%. The core may further include F. An exemplary concentration of F is less than or equal to 6 anion mol%.
Abstract:
The present invention relates to an MMF with a structure for relaxing wavelength dependence of transmission bandwidth. In the MMF, a doping amount of a dopant for control of refractive index is adjusted, so as to make each of an OFL bandwidth at a wavelength of 850 nm and an OFL bandwidth at a wavelength of at least one of 980 nm, 1060 nm, and 1300 nm become not less than 1500 MHz·km, make the OFL bandwidth at the wavelength of at least one of 980 nm, 1060 nm, and 1300 nm become wider than the OFL bandwidth at the wavelength of 850 nm, and effectively suppress increase in transmission loss.
Abstract:
Biocompatible and resorbable melt derived glass compositions which include: SiO2 60-70 weight-%, Na2O 5-20 weight-%, CaO 5-25 weight-%, MgO 0-10 weight-%, P2O5 0.5-3.0 weight-%, B2O3 0-15 weight-%, Al2O3 0-5 weight-%, and which contain less than 0.05 weight-% potassium. Biocompatible and resorbable glass fibres manufactured from these glass compositions, medical devices containing fibres of the invention, the use of these compositions for the manufacture of glass fibre and the use of the fibres for the manufacture of medical devices are also disclosed.
Abstract translation:生物相容性和可再吸收的熔融衍生玻璃组合物,其包括: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 0.5-3.0重量% B2O3 0-15重量%,Al2O3 0-5重量%,并且其含有小于0.05重量%的钾。 还公开了由这些玻璃组合物制造的生物相容性和可再吸收的玻璃纤维,含有本发明的纤维的医疗装置,这些组合物用于制造玻璃纤维的用途以及纤维用于制造医疗装置的用途。
Abstract:
Provided is a manufacturing method for an optical fiber preform of which the core is doped with a rare earth element. The method includes: depositing glass particles within a silica tube by the modified chemical vapor deposition method, the glass particles mainly consisting of silicon dioxide; adding the rare earth element and aluminum to the glass particles within the silica tube by the solution doping method; heating the silica tube while flowing a phosphorous-containing gas into the silica tube to sinter the glass particles within the silica tube while adding the phosphorous; and heating and collapsing the silica tube to which the rare earth element, the aluminum, and the phosphorous are added.
Abstract:
Provided is a manufacturing method for an optical fiber preform of which the core is doped with a rare earth element. The method includes: depositing glass particles within a silica tube by the modified chemical vapor deposition method, the glass particles mainly consisting of silicon dioxide; adding the rare earth element and aluminum to the glass particles within the silica tube by the solution doping method; heating the silica tube while flowing a phosphorous-containing gas into the silica tube to sinter the glass particles within the silica tube while adding the phosphorous; and heating and collapsing the silica tube to which the rare earth element, the aluminum, and the phosphorous are added.
Abstract:
A co-doped silicate optical waveguide having a core including silica, and oxides of aluminum, germanium, erbium and thulium. The composition concentrations are: Er from 15 ppm to 3000 ppm; Al from 0.5 mol % to 12 mol %; Tm from 15 ppm to 10000 ppm; and Ge from 1 mol % to 20 mol %. In a specific embodiment, the concentration of Er is from 150 ppm to 1500 ppm; Al is from 2 mol % to 8 mol %; and Tm is from 15 ppm to 3000 ppm. A boron-less cladding surrounds the core.
Abstract:
An optically active phosporus-silicate glass when pumped to directly excite Er ions, provides gain in 1565 nm to 1620 nm range and comprises in weight percent: SiO2 50 to 92%; Er2O3 0.01 to 2%; P2O5 greater than 5%; and Al2O3 0.0 to 0.3%.
Abstract translation:当泵浦直接激发Er离子时,光学活性硅 - 硅酸盐玻璃在1565nm至1620nm范围内提供增益,其重量百分比包括:SiO 2 50至92%; Er 2 O 3 0.01至2%; P 2 O 5大于5% 和Al2O3 0.0〜0.3%。