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    Multi-cladding optical fiber, optical fiber module, fiber laser, and fiber amplifier
    3.
    发明授权
    Multi-cladding optical fiber, optical fiber module, fiber laser, and fiber amplifier 有权
    多层包层光纤，光纤模块，光纤激光器和光纤放大器

    公开(公告)号：US08660396B2

    公开(公告)日：2014-02-25

    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： G02B6/02

    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。

    Manufacturing method for optical fiber preform and optical fiber
    4.
    发明授权
    Manufacturing method for optical fiber preform and optical fiber 有权
    光纤预制棒和光纤的制造方法

    公开(公告)号：US08693833B2

    公开(公告)日：2014-04-08

    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

    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。

    RARE-EARTH DOPED CORE MULTI-CLAD FIBER, FIBER AMPLIFIER, AND FIBER LASER
    5.
    发明申请
    RARE-EARTH DOPED CORE MULTI-CLAD FIBER, FIBER AMPLIFIER, AND FIBER LASER 审中-公开
    稀土多芯芯多层光纤，光纤放大器和光纤激光

    公开(公告)号：US20100079854A1

    公开(公告)日：2010-04-01

    申请号：US12631621

    申请日：2009-12-04

    申请人： Shoji Tanigawa ,  Kentaro Ichii

    发明人： Shoji Tanigawa ,  Kentaro Ichii

    IPC分类号： H01S3/094 ,  G02B6/036 ,  H01S3/067

    CPC分类号： G02B6/02033 ,  G02B6/03605 ,  G02B6/0365 ,  G02B6/03661 ,  H01S3/06716 ,  H01S3/06729 ,  H01S3/1608 ,  H01S3/1611

    摘要： A rare-earth doped core multi-clad fiber includes a core that includes a rare-earth element and a plurality of cladding layers that surround the core. An outermost cladding of the plurality of cladding layers is made of a polymer cladding, the plurality of cladding layers have a polygonal inner cladding, and a shape of a boundary between a second cladding from the outside and the outermost cladding does not have two-fold rotational symmetry. As a result, it is possible to provide a rare-earth doped core multi-clad fiber for an optical amplifier and a fiber laser that has low skew and is inexpensive.

    摘要翻译： 稀土掺杂的芯多包层光纤包括包含稀土元素的芯和围绕芯的多个包覆层。 多个包覆层中的最外层包层由聚合物包层制成，多个包覆层具有多边形内包层，并且来自外部的第二包层与最外包层之间的边界的形状不具有双折叠 旋转对称。 结果，可以提供一种用于光放大器的稀土掺杂核多包层光纤和具有低偏斜度并且便宜的光纤激光器。

    Ytterbium-doped optical fiber
    6.
    发明授权
    Ytterbium-doped optical fiber 有权
    镱掺杂光纤

    公开(公告)号：US08774590B2

    公开(公告)日：2014-07-08

    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 ,  H01S3/067 ,  H01S3/16

    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％。

    Optical fiber and optical transmission path that uses the optical fiber
    10.
    发明授权
    Optical fiber and optical transmission path that uses the optical fiber 失效
    使用光纤的光纤和光传输路径

    公开(公告)号：US06928211B2

    公开(公告)日：2005-08-09

    申请号：US10636552

    申请日：2003-08-08

    申请人： Shoji Tanigawa ,  Shoichiro Matsuo ,  Kuniharu Himeno

    发明人： Shoji Tanigawa ,  Shoichiro Matsuo ,  Kuniharu Himeno

    IPC分类号： G02B6/036 ,  G02B6/02

    CPC分类号： G02B6/02271 ,  G02B6/02 ,  G02B6/02014 ,  G02B6/03611

    摘要： There is provided at low cost an optical fiber suitable for wavelength division multiplex transmissions that has strengthened the tolerance to bending loss at even smaller bending diameters. The present invention is an optical fiber whose base material is silica glass and that has a two layer structure formed by a core that has a substantially uniform refractive index and by a cladding that is located outside the core and that has a substantially uniform refractive index, wherein the optical fiber satisfies the following conditions (1) to (3): (1) an outer diameter of the core is in a range of 4 to 8 μm, and a relative refractive index difference of the core is in a range of 0.4 to 0.8%; (2) chromatic dispersion at a wavelength of 1550 nm is in a range of 2 to 15 ps/nm/km; and (3) effective area at a wavelength of 1550 nm is 40 μm2 or more.

    摘要翻译： 以低成本提供了适用于波分复用传输的光纤，其在更小的弯曲直径下增强了对弯曲损耗的公差。 本发明是一种基材为石英玻璃的光纤，其具有由具有基本上均匀的折射率的芯构成的两层结构，以及位于芯外部并具有基本上均匀的折射率的包层， 其中光纤满足以下条件（1）至（3）：（1）芯的外径在4至8μm的范围内，并且芯的相对折射率差在0.4的范围内 至0.8％; （2）波长1550nm的色散在2〜15ps / nm / km的范围内; 和（3）1550nm波长的有效面积为40μm以上。