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    YTTERBIUM-DOPED OPTICAL FIBER
    3.
    发明申请
    YTTERBIUM-DOPED OPTICAL FIBER 有权
    YTTERBIUM-DOPED光纤

    公开(公告)号：US20110206341A1

    公开(公告)日：2011-08-25

    申请号：US13097563

    申请日：2011-04-29

    申请人： Kentaro ICHII ,  Shoji TANIGAWA ,  Tomofumi ARAI

    发明人： Kentaro ICHII ,  Shoji TANIGAWA ,  Tomofumi ARAI

    IPC分类号： G02B6/02

    CPC分类号： H01S3/06716 ,  C03C2201/28 ,  H01S3/06733 ,  H01S3/06754 ,  H01S3/1618 ,  H01S3/1693 ,  H01S3/175 ,  H01S3/302

    摘要： Provided is an ytterbium-doped optical fiber including a core containing at least ytterbium, aluminum and phosphorous and a clad surrounding the core, wherein a molar concentration of diphosphorus pentoxide with respect to phosphorus in the core is equal to a molar concentration of aluminum oxide with respect to aluminum in the core, wherein a ratio of a molar concentration of diphosphorus pentoxide with respect to phosphorus in the core to the molar concentration of ytterbium oxide with respect to ytterbium in the core is higher than or equal to 10 and lower than or equal to 30, and wherein a relative refractive index difference between the core and the clad is higher than or equal to 0.05% and lower than or equal to 0.30%.

    摘要翻译： 提供了一种掺镱光纤，其包括至少含有镱，铝和磷的芯和围绕芯的包层，其中五氧化二磷相对于芯中的磷的摩尔浓度等于氧化铝与 相对于芯中的铝，其中五氧化二磷的摩尔浓度相对于芯中的磷的比例相对于芯中的镱的氧化镱的摩尔浓度的比例高于或等于10并且小于或等于 至30，并且其中所述芯和所述包层之间的相对折射率差高于或等于0.05％且低于或等于0.30％。

    MANUFACTURING METHOD FOR OPTICAL FIBER PREFORM AND OPTICAL FIBER
    4.
    发明申请
    MANUFACTURING METHOD FOR OPTICAL FIBER PREFORM AND OPTICAL FIBER 有权
    光纤预制和光纤的制造方法

    公开(公告)号：US20120014653A1

    公开(公告)日：2012-01-19

    申请号：US13243092

    申请日：2011-09-23

    申请人： Kentaro ICHII ,  Shoji TANIGAWA

    发明人： Kentaro ICHII ,  Shoji TANIGAWA

    IPC分类号： G02B6/02 ,  G02B6/00

    CPC分类号： C03B37/01838 ,  C03B37/01853 ,  C03B2201/28 ,  C03B2201/36 ,  C03C13/046 ,  C03C23/0095 ,  C03C2201/28 ,  C03C2201/32 ,  C03C2201/3488 ,  C03C2201/36 ,  C03C2203/54 ,  H01S3/06716 ,  H01S3/06729

    摘要： Provided is a manufacturing method for an optical fiber preform of which the core is doped with a rare earth element. The method includes: depositing glass particles within a silica tube by the modified chemical vapor deposition method, the glass particles mainly consisting of silicon dioxide; adding the rare earth element and aluminum to the glass particles within the silica tube by the solution doping method; heating the silica tube while flowing a phosphorous-containing gas into the silica tube to sinter the glass particles within the silica tube while adding the phosphorous; and heating and collapsing the silica tube to which the rare earth element, the aluminum, and the phosphorous are added.

    摘要翻译： 本发明提供一种其中掺杂有稀土元素的光纤预制棒的制造方法。 该方法包括：通过改性化学气相沉积法将玻璃颗粒沉积在二氧化硅管内，玻璃颗粒主要由二氧化硅组成; 通过溶液掺杂法将稀土元素和铝添加到二氧化硅管内的玻璃颗粒中; 在将含磷气体流入二氧化硅管的同时加热二氧化硅管，以在加入磷的同时烧结二氧化硅管内的玻璃颗粒; 并且加热和塌陷添加有稀土元素，铝和磷的二氧化硅管。

    MULTI-CLADDING OPTICAL FIBER, OPTICAL FIBER MODULE, FIBER LASER, AND FIBER AMPLIFIER
    5.
    发明申请
    MULTI-CLADDING OPTICAL FIBER, OPTICAL FIBER MODULE, FIBER LASER, AND FIBER AMPLIFIER 有权
    多层光纤，光纤模块，光纤激光和光纤放大器

    公开(公告)号：US20110305251A1

    公开(公告)日：2011-12-15

    申请号：US13216885

    申请日：2011-08-24

    申请人： Shoji TANIGAWA ,  Kentaro ICHII ,  Katsuhiro TAKENAGA ,  Kunimasa SAITOH

    发明人： Shoji TANIGAWA ,  Kentaro ICHII ,  Katsuhiro TAKENAGA ,  Kunimasa SAITOH

    IPC分类号： H01S3/067 ,  G02B6/028

    CPC分类号： G02B6/03638 ,  G02B6/02033 ,  G02B6/14 ,  H01S3/06704 ,  H01S3/06733

    摘要： Provided is a multi-cladding optical fiber which includes: a core with an average refractive index n1; and a cladding including an inner cladding with an average refractive index n2 formed on the periphery of the core, an intermediate cladding with an average refractive index n3 formed on the periphery of the inner cladding, and an outer cladding with an average refractive index n4 formed on the periphery of the intermediate cladding where n1>n2>n3>n4. Two or more axisymmetric modes exist in the core at a wavelength of the signal light; the two or more axisymmetric modes including a fundamental mode and at least a high-order mode. When the fiber is bent at a predetermined bending diameter, the high-order mode in the core disperses within the inner cladding due to coupling with an inner cladding mode, so that only the fundamental mode substantially propagates through the core.

    摘要翻译： 提供一种多包层光纤，其包括：具有平均折射率n1的芯; 以及形成在芯的周边上的具有平均折射率n2的内包层的包层，形成在内包层的周边上的平均折射率n3的中间包层和形成有平均折射率n4的外包层 在中间包层的周边，其中n1> n2> n3> n4。 核心在信号光的波长处存在两个或多个轴对称模式; 所述两个或多个轴对称模式包括基本模式和至少高阶模式。 当纤维以预定弯曲直径弯曲时，由于与内包层模式的耦合，芯中的高阶模分散在内包层内，使得只有基本模式基本上传播通过芯。

    HOLEY SINGLE-MODE OPTICAL FIBER AND OPTICAL TRANSMISSION SYSTEM USING SAME
    9.
    发明申请
    HOLEY SINGLE-MODE OPTICAL FIBER AND OPTICAL TRANSMISSION SYSTEM USING SAME 审中-公开
    HOLEY单模光纤和光传输系统

    公开(公告)号：US20120033923A1

    公开(公告)日：2012-02-09

    申请号：US13273813

    申请日：2011-10-14

    申请人： Katsuhiro TAKENAGA ,  Shoji TANIGAWA ,  Kazuhide NAKAJIMA ,  Tomoya SHIMIZU ,  Chisato FUKAI

    发明人： Katsuhiro TAKENAGA ,  Shoji TANIGAWA ,  Kazuhide NAKAJIMA ,  Tomoya SHIMIZU ,  Chisato FUKAI

    IPC分类号： G02B6/032

    CPC分类号： G02B6/02333 ,  G02B6/02014 ,  G02B6/02266 ,  G02B6/02271 ,  G02B6/02366

    摘要： Provided is a holey single-mode optical fiber including a core not having holes, and a clad having holes extending in a longitudinal direction, in which a refraction index of the core is larger than that of a portion of the clad other than the holes, a radius r1 of the core is within a range of 2.2 to 3.2 μm, a relative refraction index difference Δ of the core to the clad is within a range of 0.3 to 0.56%, a distance Rin between a center of the core and an inner edge of the holes is 2.0 to 3.5 times the radius r1 of the core, an air-filling fraction F is within a range of 30 to 50%, a cable cut-off wavelength is 1.0 μm or less, a zero-dispersion wavelength is within a range of 1260 to 1460 nm, and a bending loss characteristic at a bending radius of 10 mm is 10 dB/m or less.

    摘要翻译： 本发明提供一种具有不具有孔的芯的多孔单模光纤和具有沿纵向延伸的孔的包层，其中芯的折射率大于除了孔以外的包层部分的折射率， 芯的半径r1在2.2〜3.2μm的范围内，相对折射率差Dgr; 芯的内径在0.3〜0.56％的范围内，芯的中心与孔的内缘的距离Rin为芯的半径r1的2.0〜3.5倍，充气率F 在30〜50％的范围内，电缆截止波长为1.0μm以下，零色散波长在1260〜1460nm的范围内，弯曲半径为10mm的弯曲损耗特性为 10 dB / m以下。