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35 条记录 (耗时 0.022 秒)

    Dispersion compensating fiber
    1.
    发明授权
    Dispersion compensating fiber 失效
    色散补偿光纤

    公开(公告)号：US06597848B1

    公开(公告)日：2003-07-22

    申请号：US09558649

    申请日：2000-04-26

    申请人： George E. Berkey ,  Lei Jiang ,  Dale R. Powers ,  V. Srikant

    发明人： George E. Berkey ,  Lei Jiang ,  Dale R. Powers ,  V. Srikant

    IPC分类号： G02B618

    CPC分类号： G02B6/03688 ,  C03B37/01413 ,  C03B37/01446 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2203/23 ,  C03B2203/26 ,  C03B2203/36 ,  C03B2207/36 ,  G02B6/02261 ,  G02B6/03677

    摘要： Disclosed is a dispersion compensating optical fiber that includes a core surrounded by a cladding layer of refractive index nCL. The core includes at least three radially adjacent regions, a central core region, a moat region having a refractive index nM that is sufficiently lower than nCL such that &Dgr;M≦−0.4%, and a ring region. As the ring region exhibits sufficiently high refractive index at a sufficiently long distance from the outer edge of the moat region, the fiber can exhibit low values of negative dispersion slope at low values of negative dispersion and yet exhibit good bending loss. This ring region is also capable of imparting to the fiber a relatively high cutoff wavelength, so that the present invention is particularly well suited for use in L-band systems. A particularly suitable fiber has an index profile in which that part of the ring region at the transition between the moat and the ring region has a refractive index such that its delta value is close to zero. Also disclosed is a method of forming the fiber of the present invention.

    摘要翻译： 公开了一种色散补偿光纤，其包括由折射率nCL的包覆层包围的芯。 芯包括至少三个径向相邻的区域，中心芯区域，具有足够低于nCL的折射率nM的护城河区域，使得DELTAM <= -0.4％，以及环形区域。 由于环形区域在距离护城河区域的外边缘足够长的距离处呈现足够高的折射率，所以在低分散负值下，纤维可以表现出低的负色散斜率值，并表现出良好的弯曲损耗。 该环形区域还能够赋予纤维相当高的截止波长，使得本发明特别适用于L波段系统。 特别合适的纤维具有折射率分布，其中在护环和环区之间的转变处的环区的那部分具有折射率使得其δ值接近于零。 还公开了形成本发明的纤维的方法。

    Methods for the separation of compounds from acidic aqueous solutions
    6.
    发明授权
    Methods for the separation of compounds from acidic aqueous solutions 有权
    从酸性水溶液中分离化合物的方法

    公开(公告)号：US06238462B1

    公开(公告)日：2001-05-29

    申请号：US09353202

    申请日：1999-07-14

    申请人： Steven A. Dunwoody ,  Lei Jiang ,  Dale R. Powers ,  Freddie G. Prince

    发明人： Steven A. Dunwoody ,  Lei Jiang ,  Dale R. Powers ,  Freddie G. Prince

    IPC分类号： B01D5314

    CPC分类号： B01D53/64 ,  C03B19/1446 ,  C03B37/0144 ,  C03B37/01846 ,  C03B2201/31

    摘要： A method is disclosed for recovering germanium from a gaseous mixture which includes a germanium-containing compound in vapor or particulate form, acid in vapor form, and water vapor. The gaseous mixture is contacted with a liquid containing water under conditions effective to dissolve the germanium-containing compound in the liquid. The acidity of the resulting liquid mixture is increased under conditions effective to vaporize the germanium-containing compound. The vaporized germanium-containing compound is contacted with one or more aqueous solutions under conditions effective to dissolve and precipitate the germanium-containing compound in at least one of the one or more aqueous solutions, and the resulting precipitate is separated from the at least one of the one or more aqueous solutions. The methods described herein are particularly well suited for recovering germanium from the waste gases produced during optical waveguide manufacturing processes. Germanium recovered by this method can thereafter be used in the production of semiconductors, optical waveguide fibers and optical components.

    摘要翻译： 公开了一种用于从气体混合物中回收锗的方法，所述气体混合物包括蒸气或颗粒形式的含锗化合物，蒸汽形式的含酸化合物和水蒸气。 在有效溶解含锗化合物的液体中的条件下，气态混合物与含有液体的液体接触。 所得液体混合物的酸度在有效蒸发含锗化合物的条件下增加。 蒸发的含锗化合物在有效溶解和沉淀至少一种一种或多种水溶液中的含锗化合物的条件下与一种或多种水溶液接触，并将所得沉淀物从至少一种 一种或多种水溶液。 本文描述的方法特别适用于从光波导制造过程中产生的废气中回收锗。 然后通过该方法回收的锗可以用于半导体，光波导纤维和光学部件的制造。

    Optical fiber preform and method
    8.
    发明授权
    Optical fiber preform and method 失效
    光纤预制棒和方法

    公开(公告)号：US4639079A

    公开(公告)日：1987-01-27

    申请号：US776523

    申请日：1985-10-28

    申请人： Dale R. Powers

    发明人： Dale R. Powers

    IPC分类号： C03B37/014 ,  G02B6/22

    CPC分类号： C03B37/014

    摘要： A porous glass optical waveguide preform is formed by depositing a coating of glass particulate material on the lateral surface of a core which may be a porous glass body continuously produced by the axial deposition of glass particles. The core rotates and moves longitudinally in one direction with respect to two flame hydrolysis burners which emit streams of glass particles having different compositions. In addition, the two burners reciprocatingly move with respect to a portion of the length of the core. The speed of each burner varies as it traverses along its path of reciprocating motion. The thickness of the layer produced by a burner at a given point is inversely related to the speed of the burner as it passes that point. The layers formed by the completion of a single traverse by both burners combine to form a conically-shaped layer, the composition of which varies from the base toward the apex thereof. The conically-shaped layer, which are adjacently located longitudinally along the preform, combine to form a cylindrically-shaped portion of the preform.

    摘要翻译： 通过在芯的侧表面上沉积玻璃颗粒材料的涂层来形成多孔玻璃光波导预制件，所述芯的侧表面可以是通过玻璃颗粒的轴向沉积连续产生的多孔玻璃体。 核心相对于发射具有不同组成的玻璃颗粒的两个火焰水解燃烧器在一个方向上纵向移动和纵向移动。 此外，两个燃烧器相对于芯的长度的一部分往复运动。 每个燃烧器的速度随着其往复运动的路径而变化。 燃烧器在给定点产生的层的厚度与通过该点时燃烧器的速度成反比。 通过由两个燃烧器完成单个横动而形成的层组合形成锥形层，其组成从基部向其顶点变化。 沿着预成型件纵向相邻定位的锥形层结合形成预成型件的圆柱形部分。

    Method of making optical waveguides
    9.
    发明授权
    Method of making optical waveguides 失效
    制造光波导的方法

    公开(公告)号：US4125388A

    公开(公告)日：1978-11-14

    申请号：US877514

    申请日：1978-02-13

    申请人： Dale R. Powers

    发明人： Dale R. Powers

    IPC分类号： C03B32/00 ,  C03B37/014 ,  C03B37/02

    CPC分类号： C03B37/01446 ,  C03B32/00 ,  C03B2201/10 ,  C03B2201/28 ,  C03B2201/30 ,  C03B2201/31 ,  C03B2201/32 ,  C03B2201/34 ,  C03B2201/40 ,  C03B2201/42 ,  Y10S65/90

    摘要： A method of making low loss glass optical waveguides, wherein at least one coating of glass soot is deposited by the flame hydrolysis process on a starting member. The starting member is removed from the coating material or glass soot preform leaving an aperture therein, and a tube is secured to one end of the preform. While the preform is heated to its consolidation termperature, an atmosphere including a drying agent flows from the tube into the aperture and through the porous preform, thereby removing water from the preform while the soot is consolidated to form a dense glass article. The tube can be removed, and the resultant dense glass article can be drawn into an optical waveguide fiber.

    摘要翻译： 一种制造低损耗玻璃光波导的方法，其中玻璃烟灰的至少一个涂层通过火焰水解过程沉积在起始构件上。 起始构件从涂层材料或玻璃烟炱预制件中移除，在其中留下孔，并且管固定到预成型件的一端。 当将预成型件加热至其固化温度时，包括干燥剂的气氛从管流入孔并通过多孔预型件，从而从烟炱中除去水，同时烟炱被固结形成致密的玻璃制品。 可以除去管，并将所得的致密玻璃制品拉入光波导纤维中。