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    Optical fiber having a large positive dispersion
    1.
    发明授权
    Optical fiber having a large positive dispersion 有权
    具有大的正色散的光纤

    公开(公告)号：US06614976B2

    公开(公告)日：2003-09-02

    申请号：US10036372

    申请日：2002-01-07

    Applicant: Takatoshi Kato ,  Kazuhiro Okamoto ,  Mitsuomi Hada ,  Shinjiro Hagihara ,  Morio Watanabe ,  Kohei Kobayashi

    Inventor： Takatoshi Kato ,  Kazuhiro Okamoto ,  Mitsuomi Hada ,  Shinjiro Hagihara ,  Morio Watanabe ,  Kohei Kobayashi

    IPC: G02B618

    CPC classification number: G02B6/02014 ,  G02B6/02266 ,  G02B6/0283 ,  G02B6/03611 ,  G02B6/03627

    Abstract: The present invention relates to an optical fiber having a large positive dispersion in a wavelength band of 1.55 &mgr;m in order to compensate for a negative dispersion inherent in an NZ-DSF in the wavelength band of 1.55 &mgr;m. This optical fiber comprises a depressed cladding structure constituted by a core region; an inner cladding, disposed at the outer periphery of the core region, having a lower refractive index; and an outer cladding having a higher refractive index. In this optical fiber, the relative refractive index difference of the core region with respect to the outer cladding is at least 0.30% but not greater than 0.50%, and the relative refractive index difference of the inner cladding with respect to the outer cladding is at least −0.50% but not greater than −0.02%. Also, the optical fiber has a dispersion greater than 18 ps/nm/km at a wavelength of 1.55 &mgr;m, and an effective cross-sectional area Aeff of at least 70 &mgr;m2 at the wavelength of 1.55 &mgr;m.

    Abstract translation: 本发明涉及一种在1.55μm波长带中具有大的正色散的光纤，以便补偿N​​Z-DSF在1.55μm波长带内固有的负色散。 该光纤包括由芯区域构成的凹陷包层结构; 设置在芯区域的外周的具有较低折射率的内包层; 以及具有较高折射率的外包层。 在该光纤中，芯区域相对于外包层的相对折射率差为0.30％以上且0.50％以下，内包层相对于外包层的相对折射率差为 至少-0.50％但不大于-0.02％。 此外，光纤的波长为1.55μm时的色散大于18ps / nm / km，波长1.55μm的有效截面积Aeff为70mum2以上。

    Optical fiber
    2.
    发明授权
    Optical fiber 有权

    公开(公告)号：US06337942B1

    公开(公告)日：2002-01-08

    申请号：US09441550

    申请日：1999-11-17

    Applicant: Takatoshi Kato ,  Kazuhiro Okamoto ,  Mitsuomi Hada ,  Shinjiro Hagihara ,  Morio Watanabe ,  Kohei Kobayashi

    Inventor： Takatoshi Kato ,  Kazuhiro Okamoto ,  Mitsuomi Hada ,  Shinjiro Hagihara ,  Morio Watanabe ,  Kohei Kobayashi

    IPC: G02B622

    CPC classification number: G02B6/02014 ,  G02B6/02266 ,  G02B6/03611 ,  G02B6/03627

    Abstract: The present invention relates to an optical fiber having a large positive dispersion in a wavelength band of 1.55 &mgr;m in order to compensate for a negative dispersion inherent in an NZ-DSF in the wavelength band of 1.55 &mgr;m. This optical fiber comprises a depressed cladding structure constituted by a core region; an inner cladding, disposed at the outer periphery of the core region, having a lower refractive index; and an outer cladding having a higher refractive index. In this optical fiber, the relative refractive index difference of the core region with respect to the outer cladding is at least 0.30% but not greater than 0.50%, and the relative refractive index difference of the inner cladding with respect to the outer cladding is at least −0.50% but not greater than −0.02%. Also, the optical fiber has a dispersion greater than 18 ps/nm/km at a wavelength of 1.55 &mgr;m, and an effective cross-sectional area Aeff of at least 70 &mgr;m2 at the wavelength of 1.55 &mgr;m.

    Method for manufacturing titanium oxide
    3.
    发明授权
    Method for manufacturing titanium oxide 失效
    制造氧化钛的方法

    公开(公告)号：US5061460A

    公开(公告)日：1991-10-29

    申请号：US392128

    申请日：1989-08-10

    Applicant: Morio Watanabe ,  Renpei Sei

    Inventor： Morio Watanabe ,  Renpei Sei

    IPC: C01G23/00 ,  C01G23/053 ,  C22B3/28

    CPC classification number: C01G23/0532 ,  C01G23/001 ,  C22B3/0012 ,  Y02P10/234 ,  Y10S423/14

    Abstract: A method for manufacturing titanium oxide, comprising bringing a sulfuric acid solution containing predominantly titanium ion together with one or more kinds of metal ions into contact with an organic solvent containing one or more species selected from the group of oxygen-containing organic solvents, alkyl amines, and alkyl aryl amines to extract the titanium ions in a form of a sulfuric acid complex from the sulfuric acid solution, and bringing the organic solvent containing the extracted titanium into contact with water or an aqueous dilute sulfuric acid solution to inversely extract the titanium from the organic solvent to the water or the dilute sulfuric acid solution and to regenerate the organic solvent.

    Process for electrolytically producing metals of Ni, Co, Zn, Cu, Mn, and Cr from a solution thereof
    4.
    发明授权
    Process for electrolytically producing metals of Ni, Co, Zn, Cu, Mn, and Cr from a solution thereof 失效
    从其溶液中电解生产Ni，Co，Zn，Cu，Mn和Cr的金属的方法

    公开(公告)号：US4789444A

    公开(公告)日：1988-12-06

    申请号：US14260

    申请日：1987-02-12

    Applicant: Morio Watanabe ,  Sanji Nishimura ,  Nobuatsu Watanabe

    Inventor： Morio Watanabe ,  Sanji Nishimura ,  Nobuatsu Watanabe

    IPC: C25C1/08 ,  C25C1/00 ,  C25C1/10 ,  C25C1/12 ,  C25C1/16

    CPC classification number: C25C1/00

    Abstract: Process for electrolytically producing metals of Ni, Co, Zn, Cu, Mn, and Cr, comprising, electrolyzing an aqueous solution containing ions of a metal as main component selected from Ni, Co, Zn, Cu, Mn, and Cr in a cathode compartment to deposit the metal electrolytically on a cathode, the cathode compartment being separated by one or more diaphragms from the remainder of the solution where iron or a metal containing iron is used for material of corrosible anode, and maintaining the concentration of iron ion in the solution circulating in the anode compartment at a low level by bringing the whole or a part of the circulating solution into contact with an organic solvent which is prepared by adding petroleum hydrocarbon for dilution of one or more extracting agents selected from the group consisting of carboxylic acids, alkylaryl phosphoric acids, hydroxyoximes, alkyl phosphoric acids, alkylamines, ketones, alkylamides, and neutral phosphoric acid esters, to extract and remove the iron or the chloro-complex ions.

    Abstract translation: 电解生产Ni，Co，Zn，Cu，Mn和Cr的金属的方法，包括：在阴极中电解含有作为主要成分的金属的离子的水溶液，其中Ni，Co，Zn，Cu，Mn和Cr 隔室将金属电解沉积在阴极上，阴极室由溶液的其余部分分隔开一个或多个隔膜，其中铁或含铁的金属用于可腐蚀阳极的材料，并将铁离子的浓度保持在 通过使全部或一部分循环溶液与通过添加石油烃制备的有机溶剂接触而在阳极室中循环的溶液处于低水平，所述有机溶剂用于稀释选自羧酸的一种或多种萃取剂 ，烷基芳基磷酸，羟基肟，烷基磷酸，烷基胺，酮，烷基酰胺和中性磷酸酯，以提取和除去铁 氯离子。

    Recovery process of uranium
    5.
    发明授权
    Recovery process of uranium 失效
    铀的回收过程

    公开(公告)号：US4478804A

    公开(公告)日：1984-10-23

    申请号：US411353

    申请日：1982-08-25

    Applicant: Morio Watanabe ,  Sanji Nishimura

    Inventor： Morio Watanabe ,  Sanji Nishimura

    IPC: C01G43/00 ,  C22B60/02

    CPC classification number: C22B60/026

    Abstract: A recovery process of uranium comprising:(1) extracting uranium ions with an organic solvent containing one or more compounds selected from the group consisting of alkyl phosphoric acid, alkyl-aryl phosphoric acid, alkyl dithio phosphoric acid, aryl dithio phosphoric acid, neutral phosphoric acid ester and alkyl amine together with a petroleum hydrocarbon as a diluent; and(2) stripping the uranium ions in the resultant organic solvent from the step (1) to an aqueous phase with contact of an aqueous solution containing one or more compounds selected from the groups of NH.sub.4 F, NH.sub.4 HF.sub.2, KF or KHF.sub.2.

    Abstract translation: 铀的回收方法包括：（1）用含有一种或多种选自烷基磷酸，烷基 - 芳基磷酸，烷基二硫代磷酸，芳基二硫代磷酸，中性磷酸的一种或多种化合物的有机溶剂萃取铀离子 酸酯和烷基胺与石油烃一起作为稀释剂; 和（2）将所得有机溶剂中的铀离子从步骤（1）中除去含有一种或多种选自NH 4 F，NH 4 HF 2，KF或KHF 2的化合物的水溶液与水相接触。

    Optical fiber
    10.
    发明授权
    Optical fiber 有权
    光纤

    公开(公告)号：US06731847B1

    公开(公告)日：2004-05-04

    申请号：US09556776

    申请日：2000-04-25

    Applicant: Takatoshi Kato ,  Kazuhiro Okamoto ,  Mitsuomi Hada ,  Shinjiro Hagihara ,  Morio Watanabe ,  Kohei Kobayashi

    Inventor： Takatoshi Kato ,  Kazuhiro Okamoto ,  Mitsuomi Hada ,  Shinjiro Hagihara ,  Morio Watanabe ,  Kohei Kobayashi

    IPC: G02B602

    CPC classification number: G02B6/02014 ,  G02B6/02266 ,  G02B6/0283 ,  G02B6/03611 ,  G02B6/03627

    Abstract: The present invention relates to an optical fiber having a large positive dispersion in a wavelength band of 1.55 &mgr;m in order to compensate for a negative dispersion inherent in an NZ-DSF in the wavelength band of 1.55 &mgr;m. This optical fiber comprises a depressed cladding structure constituted by a core region; an inner cladding, provided on the outer periphery of the core region, having a lower refractive index; and an outer cladding having a higher refractive index. In this optical fiber, the relative refractive index difference of the core region with respect to the outer cladding is 0.30% or more but 0.50% or less, and the relative refractive index difference of the inner cladding with respect to the outer cladding is −0.50% or more but −0.02% or less. Also, the optical fiber has a dispersion greater than 18 ps/nm/km at a wavelength of 1.55 &mgr;m, and an effective area of 70 &mgr;m2 or more at the wavelength of 1.55 &mgr;m.

    Abstract translation: 本发明涉及一种在1.55μm波长带上具有大的正色散的光纤，以补偿NZ-DSF在1.55μm波长带内固有的负色散。 该光纤包括由芯区域构成的凹陷包层结构; 设置在芯区域的外周上的具有较低折射率的内包层; 以及具有较高折射率的外包层。 在该光纤中，芯区域相对于外包层的相对折射率差为0.30％以上且0.50％以下，内包层相对于外包层的相对折射率差为-0.50 ％以上但为-0.02％以下。 此外，光纤的波长为1.55μm时的色散大于18ps / nm / km，波长1.55μm的有效面积为70m 2以上。

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