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    Forming optical fiber having abrupt index change
    243.
    发明授权
    Forming optical fiber having abrupt index change 失效
    形成具有突变指数变化的光纤

    公开(公告)号：US4810276A

    公开(公告)日：1989-03-07

    申请号：US81755

    申请日：1987-08-05

    Applicant: John W. Gilliland

    Inventor： John W. Gilliland

    IPC: G02B6/00 ,  C03B37/014 ,  C03B37/018 ,  C03C25/00

    CPC classification number: C03B37/01466 ,  C03B37/01446 ,  C03B37/01473 ,  C03B2201/08 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/32 ,  C03B2201/42 ,  C03B2203/22

    Abstract: A method is disclosed for making a step-index optical fiber having a steep refractive index gradient between core and cladding. Core glass particles comprising a base glass and a refractive index-increasing dopant are deposited on a mandrel. The mandrel is removed and the resultant soot preform is consolidated to form a core preform having a dopant-poor surface region. The core glass preform is stretched and the hole therein is closed to form a core bait rod. Cladding glass soot is deposited on the core bait rod at a density which is at least 0.5 g/cc. This is accomplished by directing the flame from an auxiliary burner onto the core bait rod immediately prior to the deposition of cladding soot thereon. The resultant preform is consolidated and drawn into an optical fiber. In another embodiment, the etched core preform is overclad with a layer of cladding glass, and the composite preform is stretched prior to applying a second overclad layer.

    Methods for producing optical fiber preform and optical fiber
    244.
    发明授权
    Methods for producing optical fiber preform and optical fiber 失效
    生产光纤预制棒和光纤的方法

    公开(公告)号：US4804393A

    公开(公告)日：1989-02-14

    申请号：US97320

    申请日：1987-09-11

    Applicant: Koji Yano ,  Minoru Watanabe ,  Michihisa Kyoto ,  Masao Hoshikawa

    Inventor： Koji Yano ,  Minoru Watanabe ,  Michihisa Kyoto ,  Masao Hoshikawa

    IPC: C03B37/018 ,  C03B37/014 ,  C03B37/12 ,  G02B6/00

    CPC classification number: C03B37/01446 ,  C03B37/01413 ,  C03B2201/28 ,  C03B2201/31

    Abstract: A method for producing an optical fiber preform comprising jetting a glass raw material mixture containing at least one phosphorous compound and a fuel gas through a burner, hydrolyzing the raw materials in the flame to form fine glass particles, depositing the fine glass particles to form a porous glass preform, and then sintering the porous glass preform in a stream of an inert gas with removing phosphorus liberated from the preform to produce a transparent optical fiber preform, from which transparent optical fiber preform, an optical fiber having low attenuation at a wavelength of about 1.52 micrometer is produced.

    Abstract translation: 一种光纤预制棒的制造方法，其特征在于，包括通过燃烧器喷射含有至少一种磷化合物和燃料气体的玻璃原料混合物，水解火焰中的原料，形成微细的玻璃粒子，沉积微细玻璃粒子，形成 多孔玻璃预制件，然后在惰性气体流中烧结多孔玻璃预制件，除去从预成型体释放出的磷，以制造透明光纤预制件，透明光纤预制件，其波长为低衰减的光纤 产生约1.52微米。

    Radiation resistant optical fiber waveguide
    245.
    发明授权
    Radiation resistant optical fiber waveguide 失效
    防辐射光纤波导

    公开(公告)号：US4669821A

    公开(公告)日：1987-06-02

    申请号：US652236

    申请日：1984-09-19

    Applicant: G. Richard Blair ,  Joseph L. Pikulski

    Inventor： G. Richard Blair ,  Joseph L. Pikulski

    IPC: C03B37/018 ,  C03C13/04 ,  G02B6/02 ,  G02B6/44 ,  G02B6/00

    CPC classification number: C03C13/045 ,  C03B37/01807 ,  G02B6/02 ,  G02B6/443 ,  C03B2201/28 ,  C03B2201/30

    Abstract: An optical fiber waveguide resistant to ionizing radiation having a glass core of predetermined refractive index surrounded by glass cladding having a lower predetermined refractive index. The glass core and glass cladding are each composed of high purity silica incorporating gallium as a constituent. The gallium is present in the form of Ga.sub.2 O.sub.3 in a concentration of about 0.01 to 0.15 mole percent ratio to the silica. The glass of the optical waveguide can further include phosphorus in the form of P.sub.2 O.sub.5 as an additional constituent in the amount of from about 5 to 16 mole percent ratio to the total amount of all constituents.The waveguide of the invention is preferably manufactured by using GaCl.sub.3 in combination with an internal vapor phase process to produce a silica soot (16) containing Ga.sub.2 O.sub.3 on the interior surface of a high purity silica tube (10). The soot is then consolidated and the tube collapsed to form a substantially voidless solid rod preform of high purity SiO.sub.2 containing GeO.sub.2.The process of manufacture is controlled so as to dispose Ga.sub.2 O.sub.3 within the preform in a concentration of about 0.01 to 0.15 mole percent ratio to the total constituents of the silica preform. The process can further include the deposition of P.sub.2 O.sub.5 within the preform.

    Abstract translation: 一种抗电离辐射的光纤波导，其具有由具有较低预定折射率的玻璃包层围绕的具有预定折射率的玻璃芯。 玻璃芯和玻璃包层均由以镓为主要成分的高纯度二氧化硅组成。 镓以Ga 2 O 3的形式存在，其浓度与二氧化硅的比例为约0.01至0.15摩尔％。 光波导的玻璃可以进一步包括P2O5形式的磷作为额外成分，其含量与所有组分总量的比例为约5至16摩尔％。 本发明的波导优选通过使用GaCl 3与内部气相法组合来制造在高纯度二氧化硅管（10）的内表面上产生含有Ga 2 O 3的二氧化硅烟炱（16）。 然后将烟灰固结，并且管塌陷以形成含有GeO 2的高纯度SiO 2的基本上无空隙的固体棒预制件。 控制制造过程，以便将预制件中的Ga 2 O 3以与二氧化硅预制件的总成分比例为约0.01至0.15摩尔％的浓度设置。 该方法还可以包括在预成型件内沉积P2O5。

    Method for manufacturing preforms of glass for optical fibers
    246.
    发明授权
    Method for manufacturing preforms of glass for optical fibers 失效
    光纤玻璃预成型件的制造方法

    公开(公告)号：US4642129A

    公开(公告)日：1987-02-10

    申请号：US759233

    申请日：1985-07-26

    Applicant: Nikolaos Douklias ,  Josef Grabmaier

    Inventor： Nikolaos Douklias ,  Josef Grabmaier

    IPC: C03B37/014 ,  C03B37/012 ,  G02B6/00 ,  C03B37/025

    CPC classification number: C03B37/01294 ,  C03B37/0128 ,  C03B37/01291 ,  C03B2201/10 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/42

    Abstract: An improved method of forming porous glass preforms by generating glass particles from a vapor phase and applying the particles onto a substrate characterized by generating the glass particles from a vapor phase in a separate operation, collecting the particles and then subsequently applying the previously collected particles onto a deposition surface of the substrate by creating a hot zone adjacent the deposition surface and projecting the particles as a stream through the hot zone and onto the deposition surface.

    Abstract translation: 通过从气相产生玻璃颗粒并将颗粒施加到基材上，其特征在于在单独的操作中从气相产生玻璃颗粒，收集颗粒，然后将先前收集的颗粒应用到 通过产生邻近沉积表面的热区并将颗粒作为流穿过热区投射到沉积表面上，从而沉积基底的沉积表面。

    Low viscosity core glass optical fiber
    250.
    发明授权
    Low viscosity core glass optical fiber 失效
    低粘度核心玻璃光纤

    公开(公告)号：US4413882A

    公开(公告)日：1983-11-08

    申请号：US266745

    申请日：1981-05-26

    Applicant: Alan C. Bailey ,  Alan J. Morrow

    Inventor： Alan C. Bailey ,  Alan J. Morrow

    IPC: C03B37/014 ,  G02B6/028 ,  G02B5/172

    CPC classification number: G02B6/03611 ,  C03B37/01413 ,  C03B37/01446 ,  G02B6/0281 ,  C03B2201/02 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2207/87

    Abstract: Solid glass articles are made by the flame hydrolysis technique. A thin stratum of low viscosity glass soot is applied to the surface of a mandrel. First and second coatings of glass soot are deposited on the surface of the thin stratum to form a porous preform. The refractive index of the soot particles of the first coating is greater than that of the soot of the second coating, and the soot of the first coating has a viscosity lower than that of the second coating. The mandrel is removed, and the soot preform is subjected to a high temperature whereby it is consolidated to form a dense glass blank. The glass surface tension and the relative viscosities of the inner and outer portions of the preform cause the aperture to close during the consolidation process. The thin stratum, which preferably includes P.sub.2 O.sub.5, smoothes over the damage caused by removing the mandrel and reduces or even eliminates seed formation at the axis of the resultant glass blank. The blank is heated and drawn into an optical fiber.

    Abstract translation: 固体玻璃制品是通过火焰水解技术制成的。 将低粘度玻璃烟灰的薄层施加到心轴的表面。 玻璃烟灰的第一和第二涂层沉积在薄层的表面上以形成多孔预型体。 第一涂层的烟灰颗粒的折射率大于第二涂层的烟灰的折射率，第一涂层的烟灰的粘度低于第二涂层的烟灰。 去除心轴，并且将烟灰预制件经受高温，由此将其固结以形成致密的玻璃坯料。 预成型件的内部和外部的玻璃表面张力和相对粘度在固结过程中导致孔隙闭合。 优选地包括P2O5的薄层平滑了由去除心轴引起的损伤，并减少或甚至消除了在所得玻璃坯料的轴线处的种子形成。 将坯料加热并拉入光纤。

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