Method of making optical fiber having depressed index core region
    65.
    发明公开
    Method of making optical fiber having depressed index core region 失效
    一种用于生产具有在光纤的芯区的折射率减小的光纤的过程

    公开(公告)号:EP0718244A2

    公开(公告)日:1996-06-26

    申请号:EP95119160.0

    申请日:1995-12-06

    Abstract: Disclosed is a method of making an optical fiber preform having at least one annular region of depressed refractive index. A tube of silica doped with fluorine and/or boron is overclad with silica soot. A core rod is inserted into the overclad tube and the resultant assembly is heated while chlorine flows between the tube and the core rod to clean the adjacent surfaces. When the soot consolidates, the tube collapses onto and fuses to the rod. The resultant tubular structure is provided with cladding and drawn to form an optical fiber which exhibits low attenuation as a result of the low seed count at the interface between the inner core and the region that is doped with florine and/or boron.

    Abstract translation: 公开了制备光纤预制件具有凹陷折射率中的至少一个环形设计区域的方法。 掺杂有氟和/或硼二氧化硅的管外包覆二氧化硅烟灰。 芯棒被插入到包覆管和得到的组件加热,同时氯管和芯棒清洗相邻表面之间流动。 当烟灰合并,管折叠上并熔合到杆。 所得管状结构设置有包层和拉伸以形成上光纤表现出低衰减作为在所述内芯和所述区域之间的界面的低种子计数的结果并掺杂有提供氟和/或硼。

    Fabrication of high-silica glass article
    67.
    发明公开
    Fabrication of high-silica glass article 失效
    Herstellung eines glasigen Gegenstandes mit einem hohen Gehalt一个Kieselsäuren。

    公开(公告)号:EP0281282A1

    公开(公告)日:1988-09-07

    申请号:EP88301390.6

    申请日:1988-02-18

    Applicant: AT&T Corp.

    Abstract: Incorporation of fluorine into a porous silica body, such as an unsintered body produced by a sol-gel method, by VAD or OVPO, reduces or eliminates bubble or pore formation upon re-heating of the glass formed by sintering of the porous material. Effective fluorine concentrations are between 0.01 and 5% by weight. The invention can be used advantageously in producing preforms and optical fiber.

    Abstract translation: 通过VAD或OVPO将氟引入多孔二氧化硅体,例如通过溶胶 - 凝胶法制造的未烧结体,减少或消除了通过多孔材料的烧结形成的玻璃的再加热时的气泡或孔形成。 有效氟浓度为0.01〜5重量%。 本发明可有利地用于生产预成型件和光纤。

    A method for the preparation of synthetic quartz glass suitable as a material of optical fibers
    68.
    发明公开
    A method for the preparation of synthetic quartz glass suitable as a material of optical fibers 失效
    一种用于制造合成石英玻璃的过程,其在光纤的使用。

    公开(公告)号:EP0146659A1

    公开(公告)日:1985-07-03

    申请号:EP83402510.8

    申请日:1983-12-22

    Abstract: The invention provides a novel method for the preparation of a synthetic quartz glass body substantially free from hydroxy groups as a class of undesirable impurities when the quartz glass body is used as a precursor of optical fibers. The method comprises subjecting a gaseous mixture composed of a silicon compound and a fluorine-containing hydrocarbon compound such as carbon tetrafluoride and trifluoro chloromethane to combustion or thermal decomposition in an oxidizing condition to form silicon dioxide which is deposited on the substrate to form a porous sintered body to be subsequently melted into a transparent quartz glass body. When the silicon compound and the fluorine-containing hydrocarbon compound contain no chlorine atoms, the resultant quartz glass body is also free from chlorine impurity undesirable in optical fibers. The above principle is applied to the direct preparation of a precursor rod of optical fibers by conducting the combustion or oxidative decomposition of the silicon compound in the space surrounded by the inner wall of a quartz glass tube outwardly heated at such an intensity that the silicon dioxide is deposited in transparent quartz glass layers.

    Abstract translation: 本发明提供了一种合成石英玻璃体从羟基作为一类不希望​​的杂质的基本上不含的制备的新方法。当石英玻璃体被用作光纤的前体。 该方法包括使有机硅化合物和含氟烃化合物构成的气体混合物:如四氟化碳和三氟氯代甲烷燃烧或热分解的氧化条件以形成二氧化硅的所有其沉积在衬底上以形成多孔质烧结 体随后被熔化成透明石英玻璃体。 当有机硅化合物和含氟烃化合物含有不含氯原子,所得的石英玻璃体因此是从氯杂质在光纤不希望的自由。 上述原理通过进行在由石英玻璃管在谋求强度从表面加热的内壁所包围的空间中的硅化合物的燃烧或氧化分解所施加的直接制备的光纤的前体杆到没有二氧化硅 在透明石英玻璃层被沉积。

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