Abstract:
The invention relates to a method for producing a silica glass article, involving method steps i.) providing a silica granulate, ii.) forming a glass melt from the silica granulate, and iii.) forming a silica glass article from at least some of the glass melt, step i.) consisting of steps I. producing a silica powder using at least two particles made from a silicon-chlorine compound, II. bringing the silica powder into contact with steam so as to obtain a treated silica powder, and III. granulating the treated silica powder so as to obtain a silica granulate, the chlorine content of the silica powder being higher than the chlorine content of the silica granulate. The invention further relates to a silica glass article that can be obtained by said method. The invention also relates to a method for producing a silica granulate. The invention finally relates to an optical waveguide, an illuminant and a molded article, each of which can be obtained by further processing the silica glass article.
Abstract:
The invention relates to a method for producing a silica glass article, involving method steps i.) providing a silica granulate, ii.) forming a glass melt from the silica granulate in a furnace, and iii.) forming a silica glass article from at least some of the glass melt, the furnace including a suspended sheet metal crucible. The invention further relates to a silica glass article that can be obtained by said method. The invention also relates to an optical waveguide, an illuminant and a molded article, each of which can be obtained by further processing the silica glass article.
Abstract:
The present invention relates to increasing the photosensitivity of optical fibers. One aspect of the present invention comprises a method for rapidly diffusing hydrogen or deuterium into an optical fiber from a gas mixture having a low total hydrogen content to generate changes in the refractive index of the optical fiber. The resulting photosensitive fiber may be used to create optical devices including Bragg gratings and Bragg grating-based devices.
Abstract:
The invention relates to a method for the production of opaque quartz glass wherein a blank is made from synthetic SiO2 crystals and heated to form a blank body made of opaque quartz glass at a given vitrification temperature. A method for the production of pure, opaque quartz glass is disclosed wherein said quartz glass has a homogeneous pore distribution and a high density, a high viscosity and a lower tendency to devitrify. According to the invention, the SiO2 crystals are formed from an at least partially porous agglomerate of SiO2 primary particles (21; 31) having a specific surface (according to BET) between 1.5 m2/g and 40 m2/g with a stamping density of at least 0.8 g/cm3. SiO2 granulate (21; 31) suitable for use in performing the procedure is characterized in that it is composed of an at least partially porous agglomerate of SiO2 primary particles and has a specific surface (according to BET) between 1.5 m2/g and 40 m2/g in addition to a stamping density of at least 0.6 g/cm3.
Abstract:
A silica optical fiber is provided, which contains a pure-silica core and a cladding layer formed on the pure-silica core, wherein the pure-silica core contains a C element and has a content of elements belonging to the third period - the seventh period of the periodic table, except Si element that constitutes the quartz structure, of not more than 100 ppm. The present invention can provide a silica optical fiber superior in the resistance to high energy electromagnetic waves such as UV light and γ-rays.
Abstract in simplified Chinese:本发明系关于一种用于制备石英玻璃体之方法,其包含方法步骤i.)提供二氧化硅颗粒,ii.)由该二氧化硅颗粒制造玻璃熔体及iii.)由该玻璃熔体之至少一部分制造石英玻璃体,其中该提供包含步骤I.制造由硅-氯化合物制备之具有至少两个粒子的二氧化硅粉末,II.使该二氧化硅粉末与氨接触以获得经处理之二氧化硅粉末,及III.对该经处理之二氧化硅粉末进行造粒以获得二氧化硅颗粒,并且其中该二氧化硅粉末之氯含量大于该二氧化硅颗粒之氯含量。本发明进一步系关于一种可借由此方法获得之石英玻璃体。本发明亦系关于一种用于制备二氧化硅颗粒之方法。本发明进一步系关于一种光导、一种施照体及一种成型体,其各自可借由在各情况中进一步加工该石英玻璃体获得。