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    Glass-body-producing method and optical glass body and optical fiber
    124.
    发明授权
    Glass-body-producing method and optical glass body and optical fiber 有权
    玻璃体制造方法和光学玻璃体和光纤

    公开(公告)号：US07130513B2

    公开(公告)日：2006-10-31

    申请号：US11141203

    申请日：2005-06-01

    Applicant: Tetsuya Haruna ,  Shinji Ishikawa ,  Toshiki Taru ,  Tetsutarou Katayama ,  Nobuyuki Taira

    Inventor： Tetsuya Haruna ,  Shinji Ishikawa ,  Toshiki Taru ,  Tetsutarou Katayama ,  Nobuyuki Taira

    IPC: G02B6/02

    CPC classification number: C03B37/01807 ,  C03B37/01876 ,  C03B2201/04 ,  C03B2201/075 ,  C03B2201/10 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2203/22 ,  C03B2207/90

    Abstract: A method produces a glass body that contains a reduced amount of OH groups in the metallic-oxide-containing glass layer and that has a reduced amount of transmission loss due to OH groups when the glass body is transformed into an optical fiber. The production method produces an optical glass body. An optical fiber contains the optical glass body in at least one part of its region for guiding a lightwave. The production method includes the following steps: (a) introducing into a glass pipe a gas containing an organometallic compound and a glass-forming material; (b) decomposing the organometallic compound into an organic constituent and a metallic constituent; (c) heating and oxidizing the metallic constituent so that produced glass particles containing a metallic oxide are deposited on the inner surface of the glass pipe to form a glass-particle-deposited layer; and (d) consolidating the deposited layer to form a metallic-oxide-containing glass layer.

    Abstract translation: 一种方法产生玻璃体，其在含金属氧化物的玻璃层中含有少量的OH基团，并且当玻璃体转变成光纤时，其具有由OH基导致的传输损失量减少的玻璃体。 该制造方法产生光学玻璃体。 光纤在其区域的至少一部分中包含用于引导光波的光学玻璃体。 制造方法包括以下步骤：（a）向玻璃管内导入含有有机金属化合物和玻璃形成材料的气体; （b）将有机金属化合物分解成有机成分和金属成分; （c）加热和氧化金属成分，使得在玻璃管的内表面上沉积含有金属氧化物的玻璃颗粒，形成玻璃颗粒沉积层; 和（d）固化沉积层以形成含金属氧化物的玻璃层。

    PROCESS OF MAKING RARE EARTH DOPED OPTICAL FIBRE
    127.
    发明申请
    PROCESS OF MAKING RARE EARTH DOPED OPTICAL FIBRE 有权
    制造稀土光纤光纤的工艺

    公开(公告)号：US20040187524A1

    公开(公告)日：2004-09-30

    申请号：US09982946

    申请日：2001-10-22

    Applicant: COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH

    Inventor： Ranjan Sen ,  Minati Chatterjee ,  Milan Kanti Naskar ,  Mrinmay Pal ,  Mukul Chandra Paul ,  Shyamal Kumar Bhadra ,  Kamal Dasgupta ,  Dibyendu Ganguli ,  Tarun Bandyopadhyay ,  Aharon Gedanken

    IPC: C03B037/075 ,  G02B006/00

    CPC classification number: B82Y30/00 ,  B82Y20/00 ,  C03B37/016 ,  C03B37/018 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/34 ,  C03B2201/36 ,  G02B6/02

    Abstract: The present invention discloses a process for making rare earth (RE) doped optical fibre by using RE oxide coated silica nanoparticles as the precursor materia, more particularly the method of the present invention involves preparation of stable dispersions (sol) of RE oxide coated silica nanoparticles at ambient temperature and applying a thin coating on the inner surface of silica glass tube following dip coating technique or any other conventional methods, of the said silica sol containing suitable dopants selected from Ge, Al, P, etc., the coated tubes were further processed into optical preforms by following MCVD technique and fiberised in desired configuration, the novelty lies in eliminating the step of the formation of porous soot layer at high temperature by CVD process inside a fused silica glass tube for formation of the core and also in the elemination of the incorporation of the rare earth ions into the porous soot layer following the solution doping technique or other conventional methods, the direct addition of RE oxides in the sol eliminates the formation of microcrystalites and clusters of rare earth ions and prevents change in composition including variation of RE concentration in the core which results in increase in the reproducibility and reliability of the process to a great extent, further the addition of Ge(OET)4 at ambient temperature in the silica sol reduces the quantity of GeCl4 which is required at high temperature to achieve the desired Numerical Aperture.

    Abstract translation: 本发明公开了一种通过使用RE氧化物涂覆的二氧化硅纳米颗粒作为前体材料制备稀土（RE）掺杂光纤的方法，更具体地说，本发明的方法包括制备RE氧化物涂覆的二氧化硅纳米粒子的稳定分散体（sol） 在环境温度下，在浸渍涂布技术或任何其它常规方法之后，在石英玻璃管的内表面上施加薄涂层，所述硅溶胶含有选自Ge，Al，P等的合适的掺杂剂，所述涂覆的管进一步 通过按照MCVD技术处理成光学预型件并在所需结构中纤维化，新颖性在于消除了在用于形成芯的熔融石英玻璃管内的CVD工艺在高温下形成多孔烟灰层的步骤，以及在电镀 根据溶液掺杂技术或其他配合将稀土离子掺入多孔烟灰层中 通常的方法中，在溶胶中直接添加RE氧化物消除了微晶体和稀土离子簇的形成，并且防止了组分中的变化，包括核心中RE浓度的变化，这导致过程的再现性和可靠性增加到 在很大程度上，进一步在硅溶胶中环境温度下添加Ge（OET）4会降低在高温下所需的GeCl 4的量以达到所需的数值孔径。

    Method of providing a high level of rare earth concentrations in glass fiber preforms
    129.
    发明授权
    Method of providing a high level of rare earth concentrations in glass fiber preforms 有权

    公开(公告)号：US06532774B2

    公开(公告)日：2003-03-18

    申请号：US09764938

    申请日：2001-01-17

    Applicant: Ying-Hua Zhang ,  Brian M. Laliberte ,  Ray F. Robinson

    Inventor： Ying-Hua Zhang ,  Brian M. Laliberte ,  Ray F. Robinson

    IPC: C03B37075

    CPC classification number: C03C25/105 ,  C03B37/01807 ,  C03B37/01838 ,  C03B37/027 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2207/81 ,  C03B2207/90

    Abstract: A method and apparatus are disclosed for the manufacture of an optical fiber preform having incorporated therein a comparatively high concentration of rare earth dopant material, and which thus can be drawn and processed into an optical fiber having low numerical aperture, low core attenuation, and high pumping power absorption. The high concentrations of rare earth dopant material are accomplished through either the “hybrid vapor processing” (HVP) method or a “hybrid liquid processing” (HLP) method, each capable of being practiced in combination or independently of one another. The HVP method involves the vaporization of a rare earth halogen by the exposure thereof to a sufficiently elevated temperature, independently, or contemporaneously with the transport of the resultant rare earth halogen laden vapor, into a glass forming oxidation reaction zone on a flowing stream of essentially an unreactive inert gas, such as helium. According to the HLP method, a first amount of rare earth dopant is provided according to the HVP method and/or other vapor source of rare earth dopant which is mixed with glass forming vapors to form a deposited soot layer on the internal surface of a glass tube. The soot-deposited tube is then impregnated with a dopant solution which may be formulated with a second amount of rare earth dopant. The tube is then thermally collapsed resulting in an optical preform with a an enhanced amount of incorporated first and second amounts of rare earth dopant.

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