Abstract:
There is provided a method for producing a low-loss alkali metal-doped silica core optical fiber having excellent hydrogen resistance. The method for producing the optical fiber according to the present invention includes a drawing step of drawing an optical fiber preform in a drawing furnace to produce a silica glass-based optical fiber including a core region containing an alkali metal with an average concentration of 0.5 atomic ppm or more and a cladding region that surrounds the core region and a heating step of heating the optical fiber in a heating furnace through which the optical fiber drawn from the drawing furnace passes.
Abstract:
A method for manufacturing deuterium-treated silica glass includes exposing silica glass to a deuterium-containing atmosphere for a predetermined period of time to diffuse deuterium molecules within the silica glass, maintaining the silica glass at 40° C. or higher, and cooling the silica glass to room temperature. The silica glass is a silica glass-based optical fiber having a core made of silica glass, where the core is positioned at a center of the optical fiber and contains at least germanium, and a clad made of silica glass, where the clad surrounds the core and has a lower refractive index than the core. A surface of the silica glass is covered with a resin coating.
Abstract:
A process for producing a synthetic silica glass optical component which contains at least 1×1017 molecules/cm3 and has an OH concentration of at most 200 ppm and substantially no reduction type defects, by treating a synthetic silica glass having a hydrogen molecule content of less than 1×1017 molecules/cm3 at a temperature of from 300 to 600° C. in a hydrogen gas-containing atmosphere at a pressure of from 2 to 30 atms.
Abstract translation:一种合成石英玻璃光学部件的制造方法,其通过处理氢分子含量少的合成二氧化硅玻璃,其含有至少1×10 17分子/ cm 3,OH浓度为200ppm以下,基本上无还原型缺陷 在含有氢气的气氛中,在2-30atms的压力下,在300-600℃的温度下,比1×1017分子/ cm 3。
Abstract:
A titania-doped quartz glass suited as an EUV lithographic member is prepared by feeding a silicon-providing reactant gas and a titanium-providing reactant gas through a burner along with hydrogen and oxygen, subjecting the reactant gases to oxidation or flame hydrolysis to form synthetic silica-titania fine particles, depositing the particles on a rotating target, and concurrently melting and vitrifying the deposited particles to grow an ingot of titania-doped quartz glass. The target is retracted such that the growth front of the ingot may be spaced a distance of at least 250 mm from the burner tip.
Abstract:
To optimize an optical component of synthetic quartz glass, in the case of which a quartz glass blank is subjected to a multistage annealing treatment, with respect to compaction and central birefringence, the present invention suggests a method comprising the following steps: (a) a first treatment phase during which the quartz glass blank is treated in an upper temperature range between 1130° C. and 1240° C., (b) cooling the quartz glass blank at a first-higher-mean cooling rate to a quenching temperature below 1100° C., a fictive temperature with a high mean value of 1100° C. or more being reached in the quartz glass, (c) a second treatment phase which comprises cooling of the quartz glass blank at a second-lower-mean cooling rate, and in which the quartz glass blank is treated in a lower temperature range between 950° C. and 1100° C. such that a fictive temperature is reached in the quartz glass with a low mean value which is at least 50° C. lower than the high mean value of the fictive temperature according to method step (b).
Abstract:
A method of loading at least one fused silica article with hydrogen. At least one fused silica article is first loaded with an amount of hydrogen so that the hydrogen concentration at the center of the article exceeds a minimum concentration upon completion of loading. An amount of hydrogen is the removed from the fused silica article so that the fused silica article has an average hydrogen concentration that is less than the maximum average concentration limit. The surface region of the fused silica article is then reloaded to ensure that the hydrogen concentration throughout the article is within a predetermined pressure range. A fused silica article comprising hydrogen is also described.
Abstract:
Starting from an optical component of quartz glass for transmitting ultraviolet radiation of a wavelength between 190 nm and 250 nm, with a glass structure essentially without oxygen defects, a hydrogen content ranging from 0.1×1016 molecules/cm3 to 5.0×1016 molecules/cm3, and with a content of SiH groups of less than 5×1016 molecules/cm3, to provide such a component which is particularly well suited for use with linearly polarized UV laser radiation, the present invention suggests that the component should have a content of hydroxyl groups ranging from 10 to 250 wt ppm and a fictive temperature above 1000° C.
Abstract translation:从用于透射波长在190nm和250nm之间的紫外线辐射的石英玻璃的光学部件开始,具有基本上没有氧缺陷的玻璃结构,氢含量范围为0.1×10 16分/ cm 3至5.0×10 16分/ cm 3,以及与 SiH基团的含量小于5×10 16分子/ cm 3,以提供特别适合用于线性偏振UV激光辐射的这种组分,本发明提出该组分的羟基含量范围为10〜 250重量ppm,假想温度高于1000℃
Abstract:
Disclosed is a synthetic silica glass optical material having high resistance to optical damage by ultraviolet radiation in the ultraviolet wavelength range, particularly in the wavelength less than about 250 nm and particularly, exhibiting a low laser induced wavefront distortion; specifically a laser induced wavefront distortion, measured at 633 nm, of between about −1.0 and 1.0 nm/cm when subjected to 10 billion pulses of a laser operating at approximately 193 nm and at a fluence of approximately 70 μJ/cm2. The synthetic silica glass optical material of the present invention comprises OH concentration levels of less than about 600 ppm, preferably less than 200 ppm, and H2 concentration levels less than about 5.0×1017 molecules/cm3′ and preferably less than about 2.0×1017 molecules/cm3.
Abstract translation:公开了一种合成石英玻璃光学材料,其特征在于波长小于约250nm,特别是具有低激光诱导波前失真的紫外线波长范围内具有高抗紫外线辐射的光学损伤, 具体地,在经受约193nm处的激光器操作的100亿脉冲和大约70μJ/ cm 2的能量密度下,在633nm处测量的激光感应波前失真在约-1.0和1.0nm / cm之间。 本发明的合成石英玻璃光学材料包含小于约600ppm,优选小于200ppm的OH浓度水平和小于约5.0×10 17分子/ cm 3',优选小于约2.0×10 17分子/ cm 3的H 2浓度水平 。
Abstract:
Starting from an optical component of quartz glass for transmitting ultraviolet radiation of a wavelength between 190 nm and 250 nm, with a glass structure essentially without oxygen defects, a hydrogen content ranging from 0.1×1016 molecules/cm3 to 5.0×1016 molecules/cm3, and with a content of SiH groups of less than 5×1016 molecules/cm3, to provide such a component which is particularly well suited for use with linearly polarized UV laser radiation, the present invention suggests that the component should have a content of hydroxyl groups ranging from 10 to 250 wt ppm and a fictive temperature above 1000° C.
Abstract translation:从用于透射波长在190nm和250nm之间的紫外线辐射的石英玻璃的光学部件开始,具有基本上没有氧缺陷的玻璃结构,氢含量范围为0.1×10 16分/ cm 3至5.0×10 16分/ cm 3,以及与 SiH基团的含量小于5×10 16分子/ cm 3,以提供特别适合用于线性偏振UV激光辐射的这种组分,本发明提出该组分的羟基含量范围为10〜 250重量ppm,假想温度高于1000℃
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.