Abstract:
A synthetic quartz glass for an optical member which is free from compaction and rarefaction is obtained. A synthetic quartz glass for an optical member to be used for an optical device employing a light having a wavelength of at most 400 nm and at least 170 nm as a light source, which contains substantially no oxygen excess defects, dissolved oxygen molecules nor reduction type defects, which has a chlorine concentration of at most 50 ppm and a OH group concentration of at most 100 ppm, and which contains oxygen deficient defects within a concentration range of at most 5×1014 defects/cm3 and at least 1×1013 defects/cm3. The fluorine concentration is preferably at most 100 ppm.
Abstract translation:得到不含压实和稀释的用于光学构件的合成石英玻璃。 用于光学元件的合成石英玻璃,其用于使用波长最多为400nm且至少170nm的光作为光源的光学元件,其基本上不含氧过剩缺陷,溶解氧分子或还原型 其浓度最多为50ppm,OH基浓度为100ppm以下,含有缺氧缺陷量为5×1014个/ cm 3以下且至少1×10 13个缺陷/ cm 3以下的缺陷缺陷。 氟浓度优选为100ppm以下。
Abstract:
Disclosed are high purity synthetic silica material having an internal transmission at 193 nm of at least 99.65%/cm and method of preparing such material. The material is also featured by a high compositional homogeneity in a plane transverse to the intended optical axis. The soot-to-glass process for making the material includes a step of consolidating the soot preform in the presence of H2O and/or O2.
Abstract:
A method of forming an alkali metal oxide-doped optical fiber by diffusing an alkali metal into a surface of a glass article is disclosed. The silica glass article may be in the form of a tube or a rod, or a collection of tubes or rods. The silica glass article containing the alkali metal, and impurities that may have been unintentionally diffused into the glass article, is etched to a depth sufficient to remove the impurities. The silica glass article may be further processed to form a complete optical fiber preform. The preform, when drawn into an optical fiber, exhibits a low attenuation.
Abstract:
A method for deposition glass soot for making an optical fiber preform. A fuel and a glass precursor are flowed to a burner flame forming glass soot which is deposited onto a glass target. By first depositing an insulating layer of glass soot with a low velocity burner flame, the amount of water which may be adsorbed into the surface of the glass target can be reduced. Thereafter, the flame velocity may be increased to increase the deposition rate of the glass soot without significantly increasing the concentration of water incorporated into the glass target.
Abstract:
The invention relates to a method for the manufacture of a lens of synthetic quartz glass with increased H2 content, in particular for a lens for an optical system with an operating wavelength of less than 250 nm, in particular less than 200 nm, with the steps:providing a precursor product of synthetic quartz glass, in particular with a first H2 content of less than 2·1015 molecules/cm3, with a circumferential border surface and two base surfaces lying on opposite sides, wherein at least one partial surface of at least one of said base surfaces has a curvature, andtreating the precursor product in an H2-containing atmosphere in order to produce a precursor product of synthetic quartz glass with a second H2 content that is increased in relation to the first H2 content, in particular with a second H2 content of more than 1016 molecules/cm3, and measuring at least one optical property of said precursor product with said second H2 content.
Abstract translation:本发明涉及一种用于制造具有增加的H 2 O 3含量的合成石英玻璃透镜的方法,特别是用于具有小于250nm的工作波长的光学系统的透镜,特别是 小于200nm,步骤:提供合成石英玻璃的前体产物,特别是具有小于2.10 15分子/ cm 2的第一H 2 O 3含量 其具有周向边界表面和位于相对侧上的两个基面,其中至少一个所述基底表面的至少一个部分表面具有曲率,并且将前体产物处理成H 2 O 3, 2含量的气氛,以便产生合成石英玻璃的前体产物,其具有相对于第一H 2 N 2含量增加的第二H 2 N 2含量 特别是具有超过10个/ 16个分子/ cm 3的第二H 2 N 2含量,并且测量至少一种光学式 所述前体产物具有所述第二H 2 N 2含量的操作性。
Abstract:
An improved optical fiber design has been found to exhibit a relatively low attenuation at the wavelength of 1385 nm (the “water peak”), allowing for Raman amplification to be efficient and effective at wavelengths in the S-band range of 1460 to 1530 nm. An ultra-dry process is used to mate an inner core rod (core plus surrounding trench) with a cladding tube (ring region plus cladding layers) and provide a water peak loss on the order of 0.325 dB/km. The low water peak is combined with appropriate dispersion values and zero dispersion wavelength to form a fiber that supports transmission and Raman amplification in the S-, C- and L-bands of interest for optical transmission systems.
Abstract translation:已经发现改进的光纤设计在1385nm波长(“水峰”)处呈现相当低的衰减,允许拉曼放大在1460至1530nm的S波段范围内的波长下有效和有效 。 使用超干法将内芯棒(芯加周围沟槽)与包层管(环区加覆层)配合,并提供大约0.325 dB / km的水峰值损耗。 将低水峰与适当的色散值和零色散波长组合以形成支持光传输系统感兴趣的S,C和L带中的透射和拉曼放大的光纤。
Abstract:
Methods of manufacturing an optical fiber preform and an optical fiber, and an optical fiber formed by this method of manufacturing an optical fiber are provided, the optical fiber preform having a desired refractive index profile and being capable of suppressing an increase in loss due to the absorption by OH groups. A pipe is formed by an inside vapor phase deposition method such that glass layer to be formed into a core and a glass layer to be formed into a part of a cladding pipe are deposited in a starting pipe, the glass layers each containing at least one of fluorine, germanium, phosphorous, and chlorine, the starting pipe being made of a silica glass having an outside diameter in the range of 20 to 150 mm and a wall thickness in the range of 2 to 8 mm. The pipe thus formed is collapsed to form a glass rod in which the concentration of hydroxyl groups is 10 weight ppm or less in a region from the surface of the glass rod to a depth of 1 mm therefrom.
Abstract:
A synthetic quartz glass for an optical member which is free from compaction and rarefaction is obtained. A synthetic quartz glass for an optical member to be used for an optical device employing a light having a wavelength of at most 400 nm and at least 170 nm as a light source, which contains substantially no oxygen excess defects, dissolved oxygen molecules nor reduction type defects, which has a chlorine concentration of at most 50 ppm and a OH group concentration of at most 100 ppm, and which contains oxygen deficient defects within a concentration range of at most 5×1014 defects/cm3 and at least 1×1013 defects/cm3. The fluorine concentration is preferably at most 100 ppm.
Abstract translation:得到不含压实和稀释的用于光学构件的合成石英玻璃。 用于光学元件的合成石英玻璃,其用于使用波长最多为400nm且至少170nm的光作为光源的光学元件,其基本上不含氧过剩缺陷,溶解氧分子或还原型 缺陷,其氯浓度最多为50ppm,OH基浓度为至多100ppm,并且其含有缺氧缺陷的浓度范围至多为5×10 14个/ cm 2以下 > 3%和至少1×10 3个缺陷/ cm 3。 氟浓度优选为100ppm以下。
Abstract:
Disclosed are high purity synthetic silica glass material having a high OH concentration homogeneity in a plane perpendicular to the optical axis, and process of making the same. The glass has high refractive index homogeneity. The glass can have high internal transmission of at least 99.65%/cm at 193 nm. The process does not require a post-sintering homogenization step. The controlling factors for high compositional homogeneity, thus high refractive index homogeneity, include high initial local soot density uniformity in the soot preform and slow sintering, notably isothermal treatment during consolidation.
Abstract:
First of all, there is provided a production process of a synthetic quartz glass which has less impurity, has a high-temperature viscosity characteristic equal to or more than that of a natural quartz glass, and hardly deforms even in a high-temperature environment, and especially a production process of a highly heat resistant synthetic quartz glass which is free from the generation of bubbles and is dense. Secondly, there is provided a highly heat resistant synthetic quartz glass body which is easily obtained by the production process of the present invention, and especially a transparent or black quartz glass body which is free from the generation of bubbles, is dense, has high infrared absorption rate and emission rate, and has an extremely high effect for preventing diffusion of alkali metal. The process is a process of producing a highly heat resistant quartz glass body having an absorption coefficient at 245 nm of 0.05 cm−1 or more, and the silica porous body was subjected to a reduction treatment, followed by baking, thereby forming a dense glass body.