Apparatus for rapidly drying a wet, porous gel monolith
    1.
    发明授权
    Apparatus for rapidly drying a wet, porous gel monolith 失效
    用于快速干燥湿多孔凝胶整料的装置

    公开(公告)号:US5343633A

    公开(公告)日:1994-09-06

    申请号:US28961

    申请日:1993-04-29

    摘要: A process and apparatus are described for rapidly drying a wet, porous gel monolith of glass or ceramic, at subcritical temperatures without inducing any cracking of the gel. The wet gel is immersed in a liquid solvent in a chamber, and the liquid solvent is then heated and expelled from the chamber. Further heating, with or without the presence of a flowing inert gas, fully dries the wet gel. When an inert gas is used, the gas is delivered to the chamber with a controlled solvent partial vapor pressure, to correspondingly control the driving force for drying the gel.

    摘要翻译: 描述了一种方法和装置,用于在亚临界温度下快速干燥玻璃或陶瓷的湿多孔凝胶整料,而不引起凝胶的任何裂化。 将湿凝胶浸入室内的液体溶剂中,然后将液体溶剂从室中加热并排出。 进一步加热,有或没有流动的惰性气体的存在,将湿凝胶完全干燥。 当使用惰性气体时,气体以受控的溶剂部分蒸汽压力输送到室,以相应地控制干燥凝胶的驱动力。

    Process for rapidly drying a wet, porous gel monolith
    2.
    发明授权
    Process for rapidly drying a wet, porous gel monolith 失效
    快速干燥湿多孔凝胶整料的方法

    公开(公告)号:US5243769A

    公开(公告)日:1993-09-14

    申请号:US904858

    申请日:1992-06-26

    摘要: A process and apparatus are described for rapidly drying a wet, porous gel monolith of glass or ceramic, at subcritical temperatures without inducing any cracking of the gel. The wet gel in immersed in a liquid solvent in a chamber, and the liquid solvent is then heated and expelled from the chamber. Further heating, with or without the presence of a flowing inert gas, fully dries the wet gel. When an inert gas is used, the gas is delivered to the chamber with a controlled solvent partial vapor pressure, to correspondingly control the driving force for drying the gel.

    摘要翻译: 描述了一种方法和装置,用于在亚临界温度下快速干燥玻璃或陶瓷的湿多孔凝胶整料,而不引起凝胶的任何裂化。 将湿凝胶浸入室内的液体溶剂中,然后将液体溶剂从室中加热并排出。 进一步加热,有或没有流动的惰性气体的存在,将湿凝胶完全干燥。 当使用惰性气体时,气体以受控的溶剂部分蒸汽压力输送到室,以相应地控制干燥凝胶的驱动力。

    Sol-gel process for providing a tailored gel microstructure
    3.
    发明授权
    Sol-gel process for providing a tailored gel microstructure 失效
    溶胶 - 凝胶法用于提供定制的凝胶微观结构

    公开(公告)号:US5264197A

    公开(公告)日:1993-11-23

    申请号:US811326

    申请日:1991-12-20

    摘要: An improved sol-gel process for fabricating large, crack-free gel monoliths (e.g., of silica) is described in which a specially-tailored gel microstructure is provided by adjusting the relative concentrations of an alcohol diluent (e.g., ethanol) and/or one or more catalysts (e.g., HCl and HF). Controlled variations in the gel's average pore radius, bulk density, rupture modulus, and elastic modulus over a wide range can be tailored in this fashion. This enables the process to be optimized for the particular application involved.

    摘要翻译: 描述了用于制造大的无裂纹凝胶整料(例如,二氧化硅)的改进的溶胶 - 凝胶方法,其中通过调节醇稀释剂(例如乙醇)和/或 一种或多种催化剂(例如HCl和HF)。 可以以这种方式调整凝胶的平均孔半径,体积密度,断裂模量和宽范围内的弹性模量的控制变化。 这使得针对所涉及的特定应用来优化该过程。

    Apparatus and method for making optical filament preform
    5.
    发明授权
    Apparatus and method for making optical filament preform 失效
    制造光纤预制棒的设备和方法

    公开(公告)号:US4233045A

    公开(公告)日:1980-11-11

    申请号:US963837

    申请日:1978-11-27

    申请人: Arnab Sarkar

    发明人: Arnab Sarkar

    IPC分类号: C03B37/018 C23C16/04 C03C7/02

    摘要: A glass optical waveguide filament preform is prepared by chemical reaction of vapor ingredients within a glass bait tube. A reactant feed tube extends into one end of the bait tube and terminates just short of the hot zone where reaction occurs. The end of the feed tube traverses the bait tube along with the burner which generates the hot zone. Reactants flow radially from slots in the end of the wall of the feed tube and combine with a flushing gas to form a mixture which flows in a spiral path through the hot zone.

    摘要翻译: 通过玻璃诱饵管内的蒸气成分的化学反应来制备玻璃光导纤维预制棒。 反应物进料管延伸到诱饵管的一端,并且刚好在发生反应的热区域的末端终止。 进料管的末端与产生热区的燃烧器一起穿过诱饵管。 反应物从进料管壁的端部的槽径向流动并与冲洗气体结合形成混合物,该混合物以螺旋路径流过热区。

    Apparatus for deposition by flame hydrolysis
    6.
    发明申请
    Apparatus for deposition by flame hydrolysis 有权
    用于通过火焰水解沉积的装置

    公开(公告)号:US20050166641A1

    公开(公告)日:2005-08-04

    申请号:US11050461

    申请日:2005-02-01

    IPC分类号: C03B37/014 C03B37/018

    摘要: An outside chemical vapor deposition apparatus is disclosed for depositing porous glass-forming material onto a target rod to form a cylindrical body, with substantially higher efficiency than could prior apparatus. The apparatus includes two separate burner arrays, one array optimized for depositing the material during an initial stage of the process, when the cylindrical body has a relatively small diameter, and the other array optimized for depositing the material during a later stage of the process, when the cylindrical body has a relatively large diameter. In addition, each burner array can include a plurality of burners, with each burner azimuthally angled relative to the apparatus' air-flow axis, and with adjacent burners angled in opposite directions relative to that axis, to minimize the density gradient within the deposited porous material.

    摘要翻译: 公开了用于将多孔玻璃形成材料沉积到目标棒上以形成圆柱形主体的外部化学气相沉积装置,其效率比现有装置高得多。 该装置包括两个单独的燃烧器阵列,当圆柱体具有相对较小的直径时,优选用于在该过程的初始阶段期间沉积材料的一个阵列,并且针对在该过程的稍后阶段期间沉积材料而优化的另一个阵列, 当圆柱体具有相对大的直径时。 此外,每个燃烧器阵列可以包括多个燃烧器,其中每个燃烧器相对于装置的气流轴线方位角成角度,并且具有相对于该轴线相反方向成角度的相邻燃烧器,以使沉积的多孔体内的密度梯度最小化 材料。

    Methods of making optical waveguides
    7.
    发明授权
    Methods of making optical waveguides 失效
    制造光波导的方法

    公开(公告)号:US5028246A

    公开(公告)日:1991-07-02

    申请号:US308986

    申请日:1989-02-08

    申请人: Arnab Sarkar

    发明人: Arnab Sarkar

    IPC分类号: C03B37/014

    摘要: Low attenuation, low dispersion of optical waveguides are provided by a process initiating with axial deposition of a high velocity core soot stream impinging on a target at a high angle of incidence relative to the axis of rotation of the target. A core cylinder is built up axially by relative movement between the soot stream and target during deposition, the movement being non-constant in order to maintain a substantially constant diameter with a constant deposition rate. A cladding layer is then built up by deposition of soot radially on the core. Subsequent drying and sintering provides a vitreous preform which may be drawn directly into optical waveguides. Alternatively, the sintered product may be drawn down to smaller rods, which then are covered with further deposited soot cladding to a desired final thickness, and after further drying and sintering may be drawn to optical waveguides.

    摘要翻译: 光波导的低衰减,低色散是通过以相对于目标的旋转轴线以高入射角冲击目标的高速核心烟灰流的轴向沉积开始的过程来提供的。 在沉积期间通过烟灰流和靶之间的相对运动轴向地建立芯筒,该运动是不恒定的,以便以恒定的沉积速率保持基本上恒定的直径。 然后通过将烟灰放射在芯上沉积来形成包覆层。 随后的干燥和烧结提供可以直接拉入光波导的玻璃状预制件。 或者,烧结产品可以被拉伸到较小的杆,然后用另外沉积的烟灰覆层覆盖到所需的最终厚度,并且在进一步干燥和烧结之后,可以将其吸引到光波导。

    High bandwidth optical waveguide having B.sub.2 O.sub.3 free core and
method of fabrication
    8.
    发明授权
    High bandwidth optical waveguide having B.sub.2 O.sub.3 free core and method of fabrication 失效
    具有B2O3自由磁芯的高带宽光波导和制造方法

    公开(公告)号:US4229070A

    公开(公告)日:1980-10-21

    申请号:US929415

    申请日:1978-07-31

    摘要: A method of forming a preform or blank for a high bandwidth gradient index optical filament, the preform itself and the resulting optical filament is disclosed. The preform which ultimately forms the optical filament includes a barrier layer between a tubular starting member which comprises the cladding and the core, the index of refraction of the barrier layer being equal to or less than the index of refraction of the tubular starting member; there being no step increase in the index of refraction of the barrier layer at the barrier layer-cladding interface nor of the core at the core-barrier layer interface of the optical filament. The tubular starting member is formed of a base glass and at least one dopant, the index of refraction of the tubular starting member being in excess of said base glass. The barrier layer is formed from a base glass and at least one dopant which is maintained substantially constant in the barrier layer. The core is formed of a base glass and at least one dopant which is gradually varied during the formation of the core, the core being free of B.sub.2 O.sub.3.

    摘要翻译: 公开了一种形成用于高带宽梯度折射率光纤的预成型件或坯料的方法,预成型件本身和所得到的光纤。 最终形成光纤的预成型件包括在包括包层和芯之间的管状起始构件之间的阻挡层,阻挡层的折射率等于或小于管状起始构件的折射率; 阻挡层 - 包层界面处的阻挡层的折射率和光纤的芯阻挡层界面处的芯的折射率没有增加。 管状起始构件由基底玻璃和至少一种掺杂物形成,管状起始构件的折射率超过所述基础玻璃。 阻挡层由基底玻璃和在阻挡层中保持基本恒定的至少一种掺杂剂形成。 芯由基底玻璃和至少一种在芯的形成期间逐渐变化的掺杂剂形成,芯不含B 2 O 3。

    Apparatus for deposition by flame hydrolysis
    10.
    发明授权
    Apparatus for deposition by flame hydrolysis 有权
    用于通过火焰水解沉积的装置

    公开(公告)号:US07383704B2

    公开(公告)日:2008-06-10

    申请号:US11050461

    申请日:2005-02-01

    IPC分类号: C03B37/018 C03B5/237 F27B1/26

    摘要: An outside chemical vapor deposition apparatus is disclosed for depositing porous glass-forming material onto a target rod to form a cylindrical body, with substantially higher efficiency than could prior apparatus. The apparatus includes two separate burner arrays, one array optimized for depositing the material during an initial stage of the process, when the cylindrical body has a relatively small diameter, and the other array optimized for depositing the material during a later stage of the process, when the cylindrical body has a relatively large diameter. In addition, each burner array can include a plurality of burners, with each burner azimuthally angled relative to the apparatus' air-flow axis, and with adjacent burners angled in opposite directions relative to that axis, to minimize the density gradient within the deposited porous material.

    摘要翻译: 公开了用于将多孔玻璃形成材料沉积到目标棒上以形成圆柱形主体的外部化学气相沉积装置,其效率比现有装置高得多。 该装置包括两个单独的燃烧器阵列,当圆柱体具有相对较小的直径时,优选用于在该过程的初始阶段期间沉积材料的一个阵列,并且针对在该过程的稍后阶段期间沉积材料而优化的另一个阵列, 当圆柱体具有相对大的直径时。 此外,每个燃烧器阵列可以包括多个燃烧器,其中每个燃烧器相对于装置的气流轴线方位角成角度,并且具有相对于该轴线相反方向成角度的相邻燃烧器,以使沉积的多孔体内的密度梯度最小化 材料。