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    Process of making rare earth doped optical fiber
    213.
    发明授权
    Process of making rare earth doped optical fiber 有权
    制造稀土掺杂光纤的工艺

    公开(公告)号：US06889528B2

    公开(公告)日：2005-05-10

    申请号：US09982946

    申请日：2001-10-22

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

    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: C03B37/016 ,  C03B37/018 ,  G02B6/02 ,  G02B6/00

    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 fiber by using RE oxide coated silica nanoparticles as the precursor material, 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 fiberized 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 通过遵循MCVD技术将其加工成光学预型件并在所需结构中纤维化，其新颖之处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 在溶液掺杂技术或其它共混物之后将稀土离子掺入多孔烟灰层中 常规方法中，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，并且防止了组分中包括核心中的RE浓度的变化的变化，这导致过程的再现性和可靠性增加到 在很大程度上，进一步在硅溶胶中在环境温度下添加Ge（OET）4 降低了在高温下所需的GeCl 4的量，以达到所需的数值 光圈。

    Sol-gel-derived halogen-doped glass
    215.
    发明申请
    Sol-gel-derived halogen-doped glass 审中-公开
    溶胶凝胶衍生的卤素掺杂玻璃

    公开(公告)号：US20040194511A1

    公开(公告)日：2004-10-07

    申请号：US10771176

    申请日：2004-02-03

    Inventor： Chih-Hsing Cheng ,  Dengfeng Xu

    IPC: C03B037/016 ,  C03C003/06

    CPC classification number: C03B19/12 ,  C03B37/01211 ,  C03B37/0124 ,  C03B37/016 ,  C03B2201/10 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/32 ,  C03B2201/34 ,  C03C3/06

    Abstract: A method of fabricating a halogen-doped glass includes providing a gel monolith having a first halogen content. The method further includes reducing an impurity concentration of the gel monolith. The method further includes consolidating the gel monolith into a glass having a second halogen content. The second halogen content is less than or equal to the first halogen content. A halogen-doped glass has a fluorine content in a range between approximately 0.5 wt. % and approximately 4 wt. %, a chlorine content less than 100 parts per million, and an OH content less than one part per million.

    Abstract translation: 制造卤素掺杂玻璃的方法包括提供具有第一卤素含量的凝胶整料。 该方法还包括降低凝胶整料的杂质浓度。 该方法还包括将凝胶整料固结成具有第二卤素含量的玻璃。 第二卤素含量小于或等于第一卤素含量。 卤素掺杂的玻璃的氟含量在约0.5wt。 ％和约4wt。 ％，氯含量低于100ppm，OH含量低于百万分之一。

    Process for making rare earth doped optical fiber
    216.
    发明授权
    Process for making rare earth doped optical fiber 有权
    制造稀土掺杂光纤的工艺

    公开(公告)号：US06751990B2

    公开(公告)日：2004-06-22

    申请号：US09800291

    申请日：2001-03-06

    Applicant: Tarun Bandyopadhyay ,  Ranjan Sen ,  Shyamal Kumar Bhadra ,  Kamal Dasgupta ,  Mukul Chandra Paul

    Inventor： Tarun Bandyopadhyay ,  Ranjan Sen ,  Shyamal Kumar Bhadra ,  Kamal Dasgupta ,  Mukul Chandra Paul

    IPC: C03B37018

    CPC classification number: C03B37/01838 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/36 ,  Y02P40/57

    Abstract: The present invention provides an improved process for making rare earth doped preforms and fibers by a combination of MCVD technique and solution doping method, said method comprising developing matched or depressed clad structure inside a silica glass substrate tube followed by deposition of unsintered particulate layer containing GeO2 and P2O5 for formation of the core and solution doping by soaking the porous soot layer into an alcoholic/aqueous solution of RE-salts containing co-dopants like AlCl3/Al(NO3)3 in definite proportion, controlling the porosity of the soot, dipping period, strength of the solution and the proportion of the codopants to achieve the desired RE ion concentration in the core and minimize the core clad boundary defects and followed by drying, oxidation, dehydration and sintering of the RE containing porous deposit and collapsing at a high temperature to produce the preform and overcladding with silica tubes of suitable dimensions and fiber drawing to produce fibers.

    Abstract translation: 本发明提供了一种通过MCVD技术和溶液掺杂方法的组合制备稀土掺杂预成型件和纤维的改进方法，所述方法包括在石英玻璃基板管内形成匹配或凹陷的包层结构，随后沉积含有GeO 2的未烧结颗粒层 和P2O5，用于通过将多孔烟灰层以一定比例浸入含有Al-Al 3+（NO 3）3的共掺杂剂的RE盐的醇/水溶液中形成核心和溶液掺杂，控制烟灰的孔隙率，浸渍 时间，溶液的强度和共混物的比例以实现芯中期望的RE离子浓度，并使芯包覆边界缺陷最小化，随后使含RE的多孔沉积物进行干燥，氧化，脱水和烧结并在高处塌陷 温度以产生预制件并用适当尺寸的硅胶管和纤维拉伸制成外包层 纤维。

    Optical fiber preform having barrier layers for hydroxyl (OH) radicals
    218.
    发明申请
    Optical fiber preform having barrier layers for hydroxyl (OH) radicals 失效
    具有羟基（OH）自由基的屏障层的光纤预制棒

    公开(公告)号：US20040110007A1

    公开(公告)日：2004-06-10

    申请号：US10465242

    申请日：2003-06-19

    Inventor： Sung-Jin Kim ,  Sung-Koog OH

    IPC: B32B017/06

    CPC classification number: C03C13/045 ,  C03B37/01807 ,  C03B2201/10 ,  C03B2201/28 ,  C03B2203/22 ,  Y10T428/315

    Abstract: Disclosed is an optical-fiber preform having barrier layers to hydroxyl radicals, the optical-fiber preform comprising: a quartz tube in the form of a cylinder shape serving as a substrate for forming the optical-fiber preform; a first barrier layer for preventing hydroxyl radicals from permeating the optical-fiber preform and deposited onto the inner surface of the quartz tube; a second barrier layer having a permeation coefficient higher than the first barrier layer and deposited onto the first barrier layer; a third barrier layer having a permeation coefficient lower than the second barrier layer and deposited onto the second barrier layer; and, a core layer being located at the center of the optical-fiber preform.

    Abstract translation: 公开了一种具有羟基自由基阻挡层的光纤预制棒，该光纤预制棒包括：用作形成光纤预制棒的基底的圆筒形状的石英管; 用于防止羟基自由基渗透到光纤预制件并沉积到石英管的内表面上的第一阻挡层; 第二阻挡层，其透过系数高于第一阻挡层并沉积在第一阻挡层上; 第三阻挡层，其透过系数低于第二阻挡层并沉积到第二阻挡层上; 并且芯层位于光纤预制棒的中心。

    Optical fiber
    219.
    发明申请
    Optical fiber 有权
    光纤

    公开(公告)号：US20040086245A1

    公开(公告)日：2004-05-06

    申请号：US10619376

    申请日：2003-07-11

    Inventor： Julia A. Farroni ,  Adrian Carter ,  Kanishka Tankala

    IPC: G02B006/16 ,  G02B006/17

    CPC classification number: G02B6/02114 ,  C03B37/01217 ,  C03B37/01231 ,  C03B2201/10 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/34 ,  C03B2201/42 ,  C03B2203/23 ,  C03B2203/31 ,  G02B6/024

    Abstract: An optical fiber comprises a photosensitive core that includes a concentration of a first material that increases the refractive index of the core and a concentration of a second material that is other than boron and that reduces the refractive index of the core. A cladding is disposed about the core for tending to confine light to the core. The fiber also includes at least one longitudinally extending region having a thermal coefficient of expansion that is different from the thermal coefficient of expansion of the cladding. In another embodiment, the core includes a concentration of germanium and a concentration of boron. Also disclosed is a polarization-maintaining double-clad (PM DC) fiber comprising one or both of at least one circular axially extending stress inducing region(s) and an inner cladding comprising a circular outer perimeter. Fibers according to the invention can include a rare earth dopant for emitting light of a selected wavelength responsive to being pumped by pump light of a pump wavelength that is different than the selected wavelength.

    Abstract translation: 光纤包括感光芯，其包括提高芯的折射率的第一材料的浓度和不同于硼的第二材料的浓度，并降低芯的折射率。 围绕芯部布置包层以倾向于将光限制在芯部上。 纤维还包括具有不同于包层的热膨胀系数的热膨胀系数的至少一个纵向延伸区域。 在另一个实施方案中，芯包括锗的浓度和硼的浓度。 还公开了一种包括至少一个圆形轴向延伸的应力诱导区域和包含圆形外周边的内包层中的一个或两个的偏振保持双包层（PMDC）光纤。 根据本发明的纤维可以包括用于发射选定波长的光的稀土掺杂剂，其响应于通过不同于所选波长的泵浦波长的泵浦光泵浦。

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