OPTICAL FIBER CONTAINING ALKALI METAL OXIDE
    11.
    发明申请
    OPTICAL FIBER CONTAINING ALKALI METAL OXIDE 审中-公开
    包含碱金属氧化物的光纤

    公开(公告)号:WO2007149344A1

    公开(公告)日:2007-12-27

    申请号:PCT/US2007/014114

    申请日:2007-06-15

    Abstract: Disclosed is an optical fiber having a silica-based core comprising an alkali metal oxide selected from the group consisting of K2O, Na2O, LiO2, Rb2O, Cs2O and mixtures thereof in an average concentration in said core between about 50 and 500 ppm by weight, said core further comprising chlorine and fluorine, wherein the average concentration of fluorine in said core is greater than the average concentration of alkali metal oxide in said core and the average concentration of chlorine in said core is greater than the average concentration of alkali metal oxide in said core; and a silica-based cladding surrounding and directly adjacent the core. By appropriately selecting the concentration of alkali metal oxide dopant in the core and the cladding, a low loss optical fiber may be obtained.

    Abstract translation: 公开了一种光纤,其具有二氧化硅基核,其包含选自K2O,Na2O,LiO2,Rb2O,Cs2O及其混合物的碱金属氧化物,其中所述芯中的平均浓度为约50至500重量ppm, 所述芯还包含氯和氟,其中所述芯中的氟的平均浓度大于所述芯中的碱金属氧化物的平均浓度,并且所述芯中的平均氯浓度大于碱金属氧化物的平均浓度 说核心; 以及围绕并直接邻近芯的二氧化硅基包层。 通过适当地选择芯和包层中的碱金属氧化物掺杂剂的浓度,可以获得低损耗光纤。

    METHOD AND APPARATUS FOR MANUFACTURING WATER-FREE OPTICAL FIBER PREFORMS
    12.
    发明申请
    METHOD AND APPARATUS FOR MANUFACTURING WATER-FREE OPTICAL FIBER PREFORMS 审中-公开
    用于制造无水光纤预制件的方法和装置

    公开(公告)号:WO2007059336A1

    公开(公告)日:2007-05-24

    申请号:PCT/US2006/044852

    申请日:2006-11-16

    CPC classification number: C03B37/01446 C03B37/0146

    Abstract: A method and apparatus are described for manufacturing substantially water-free optical fiber preforms by an outside vapor deposition (OVD) process, using a multi-functional apparatus that combines a vertical glass lathe with an OVD sintering system in one machine frame. The method includes steps of flame-sealing a quartz sintering tube to the handle of a porous soot preform made by an OVD process, after its deposition mandrel has been removed. The sintering tube is held in a rotatable chuck and used to feed the preform into a sintering muffle and oven. The open end of this sintering tube is connected through a rotary union above the chuck to a valve assembly that can be used to feed dehydration and sintering gases into the sintering muffle and also to draw a vacuum after sintering has been completed. The apparatus thereafter is used to seal the sintered preform's central aperture by collapsing a section of the sintering tube outside the sintering environment, while the aperture still is under vacuum, without allowing the central aperture to be exposed to ambient atmosphere. The resulting tubular preform thereafter can be processed further by a conventional steps of elongation to form a solid core preform, adding clad glass, and drawing into optical fiber.

    Abstract translation: 描述了一种用于通过外部气相沉积(OVD)工艺制造基本上无水的光纤预制件的方法和装置,其使用在一个机架中组合立式玻璃车床与OVD烧结系统的多功能设备。 该方法包括将石英烧结管火焰密封到通过OVD工艺制造的多孔烟炱预制件的手柄上,其中其沉积心轴已经被去除之后。 烧结管被保持在可旋转卡盘中,用于将预成型件进料到烧结马弗炉和烘箱中。 该烧结管的开口端通过卡盘上方的旋转联接器连接到阀组件,该组件可用于将烧结气体进入脱烧和烧结烧结马弗炉,并且在烧结完成之后还抽出真空。 此后的装置用于通过在烧结环境外部将烧结管的一部分塌缩,同时孔仍处于真空状态,而不允许中心孔暴露于环境气氛中,来密封烧结预成型件的中心孔。 之后的所得到的管状预成型件可以通过常规的伸长步骤进一步加工,以形成固体芯预制件,加入包覆玻璃和拉伸成光纤。

    METHOD AND APPARATUS FOR MANUFACTURING AN OPTICAL FIBER CORE ROD
    14.
    发明申请
    METHOD AND APPARATUS FOR MANUFACTURING AN OPTICAL FIBER CORE ROD 审中-公开
    制造光纤芯线的方法和装置

    公开(公告)号:WO2006071865A2

    公开(公告)日:2006-07-06

    申请号:PCT/US2005047075

    申请日:2005-12-22

    Abstract: A multi-functional apparatus is disclosed for producing a low hydroxyl ion-containing core rod suitable for the production of low-water optical fibers. The apparatus combines the process steps of (1) hermetically sealing a tubular quartz handle of a tubular porous core preform to a tube used to feed the porous preform into a sintering furnace, (2) dehydration and sintering, and (3) elongation of the sintered preform under vacuum, all without exposing the preform's central aperture surface to ambient atmosphere.

    Abstract translation: 公开了用于生产适用于生产低水光纤的含低羟基离子芯棒的多功能设备。 该装置结合了(1)将管状多孔芯预制件的管状石英手柄气密地密封到用于将多孔预成型件进料到烧结炉中的管的工艺步骤,(2)脱水和烧结,以及(3) 在预制件的真空下,所有这些都不会使预成型坯的中心孔表面暴露于环境气氛。

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