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。

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。

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。

公开(公告)号：US08750663B2

公开(公告)日：2014-06-10

申请号：US13587173

申请日：2012-08-16

申请人： Shoji Tanigawa ,  Katsuhiro Takenaga

发明人： Shoji Tanigawa ,  Katsuhiro Takenaga

IPC分类号： G02B6/36 ,  G02B6/02 ,  C03B37/012 ,  G02B6/14 ,  G02B6/28 ,  G02B6/036 ,  G02B6/028

CPC分类号： G02B6/02042 ,  C03B37/01222 ,  C03B2201/86 ,  C03B2203/22 ,  C03B2203/26 ,  C03B2203/34 ,  G02B6/0288 ,  G02B6/03633 ,  G02B6/14 ,  G02B6/2804

摘要： A coupled multi-core fiber 10 includes a plurality of cores 11 and a clad 12 surrounding the plurality of cores 11, wherein the plurality of cores 11 are arranged in such a way that periphery surfaces of the adjacent cores 11 contact with each other, each of the cores 11 is made to have a refractive index higher than the clad 12 and includes: an outer region 16 having a predetermined thickness from the periphery surface; and an inner region 15 made to have a higher refractive index than the outer region 16 and surrounded by the outer region 16.

摘要翻译： 耦合的多芯光纤10包括多个芯11和围绕多个芯11的包层12，其中多个芯11以相邻芯11的周边表面彼此接触的方式布置，每个 芯11的折射率高于包层12，并且包括：具有从外围表面预定厚度的外部区域16; 以及具有比外部区域16更高的折射率并被外部区域16包围的内部区域15。

公开(公告)号：US20130044989A1

公开(公告)日：2013-02-21

申请号：US13587189

申请日：2012-08-16

申请人： Shoji Tanigawa ,  Katsuhiro Takenaga

发明人： Shoji Tanigawa ,  Katsuhiro Takenaga

IPC分类号： G02B6/02 ,  C03B37/027 ,  C03B37/012

CPC分类号： G02B6/02042 ,  C03B37/01222 ,  C03B37/02754 ,  C03B2201/02 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2203/26 ,  C03B2203/34 ,  C03B2205/14

摘要： Provided is a method of producing a preform 10P for a coupled multi-core fiber including: an arranging process P1 for arranging a plurality of core glass bodies 11R and a clad glass body 12R in such a way that the plurality of core glass bodies 11R are surrounded by the clad glass body 12R; and a collapsing process P2 for collapsing a gap between the core glass bodies 11R and the clad glass body 12R, wherein the respective core glass bodies 11R have outer regions 16 having a predetermined thickness from the periphery surfaces and made of silica glass undoped with germanium, and the clad glass body 12R is made of silica glass having a refractive index lower than a refractive index of the outer regions of the core glass bodies 11R.

公开(公告)号：US08941912B2

公开(公告)日：2015-01-27

申请号：US13020604

申请日：2011-02-03

申请人： Shoji Tanigawa ,  Teruno Nakaguma ,  Tomofumi Arai ,  Kentaro Ichii

发明人： Shoji Tanigawa ,  Teruno Nakaguma ,  Tomofumi Arai ,  Kentaro Ichii

IPC分类号： H04B10/17 ,  G02B6/036 ,  G02B6/02 ,  C03C13/04 ,  G02B6/024 ,  G02B6/028 ,  H01S3/067 ,  H01S3/16

CPC分类号： G02B6/02 ,  C03C13/046 ,  G02B6/02395 ,  G02B6/024 ,  G02B6/0285 ,  G02B6/03611 ,  G02B6/03633 ,  G02B6/03638 ,  G02B6/03644 ,  G02B6/0365 ,  G02B6/03661 ,  H01S3/06708 ,  H01S3/06716 ,  H01S3/0672 ,  H01S3/06729 ,  H01S3/06737 ,  H01S3/1618 ,  H01S3/1691 ,  H01S3/1693

摘要： An ytterbium-doped optical fiber includes: a core which contains at least ytterbium, aluminum, and phosphorus; and a cladding which encircles the core, wherein an aluminum oxide equivalent concentration of the aluminum in the core is 0.2 mol % or more, a diphosphorus pentaoxide equivalent concentration of the phosphorus is higher than the aluminum oxide equivalent concentration, and the core either does not contain germanium or contains less than 1.1 mol % of germanium in a germanium dioxide equivalent concentration.

摘要翻译： 镱掺杂光纤包括：至少包含镱，铝和磷的芯; 以及围绕芯的包层，芯中的铝的氧化铝当量浓度为0.2摩尔％以上，磷的五氧化二磷当量浓度高于氧化铝当量浓度，芯不会 含有锗或含有少于1.1摩尔％的二氧化锗当量浓度的锗。

公开(公告)号：US08363313B2

公开(公告)日：2013-01-29

申请号：US12907622

申请日：2010-10-19

申请人： Teruno Nakaguma ,  Kentaro Ichii ,  Shoji Tanigawa

发明人： Teruno Nakaguma ,  Kentaro Ichii ,  Shoji Tanigawa

IPC分类号： H01S3/067 ,  C03C13/04 ,  C03C3/04 ,  G02B6/02 ,  C03C4/08

CPC分类号： H01S3/06716 ,  C03C3/06 ,  C03C13/045 ,  C03C2201/10 ,  C03C2201/12 ,  C03C2201/14 ,  C03C2201/28 ,  C03C2201/31 ,  C03C2201/3488 ,  C03C2201/36 ,  G02B6/024 ,  G02B6/036 ,  G02B6/03605 ,  G02B6/03633 ,  G02B6/03638 ,  G02B6/03644 ,  G02B6/03661 ,  H01S3/06712 ,  H01S3/06729 ,  H01S3/0675 ,  H01S3/094007 ,  H01S3/1608 ,  H01S3/1618 ,  H01S3/1691 ,  H01S3/1693

摘要： An ytterbium-doped optical fiber of the present invention includes: a core which contains ytterbium, aluminum, and phosphorus and does not contain germanium; and a cladding which surrounds this core. The ytterbium concentration in the core in terms of ytterbium oxide is 0.09 to 0.68 mole percent. The molar ratio between the phosphorus concentration in the core in terms of diphosphorus pentoxide and the above ytterbium concentration in terms of ytterbium oxide is 3 to 30. The molar ratio between the aluminum concentration in the core in terms of aluminum oxide and the above ytterbium concentration in terms of ytterbium oxide is 3 to 32. The molar ratio between the above aluminum concentration in terms of aluminum oxide and the above phosphorus concentration in terms of diphosphorus pentoxide is 1 to 2.5.

摘要翻译： 本发明的镱掺杂光纤包括：含有镱，铝和磷并且不含锗的芯; 以及围绕该芯的包层。 以镱氧化物计，核心中的镱浓度为0.09〜0.68摩尔％。 以氧化镱表示的核心中的磷浓度与上述镱的氧化镱浓度之间的摩尔比为3〜30。以氧化铝计的核心中的铝浓度与上述镱的浓度 氧化镱的数量为3〜32。以氧化铝计的上述铝浓度与上述磷浓度之间的摩尔比为1〜2.5。

公开(公告)号：US08971684B2

公开(公告)日：2015-03-03

申请号：US13587189

申请日：2012-08-16

申请人： Shoji Tanigawa ,  Katsuhiro Takenaga

发明人： Shoji Tanigawa ,  Katsuhiro Takenaga

IPC分类号： G02B6/036 ,  G02B6/255 ,  C03B37/012 ,  C03B37/027 ,  G02B6/02

CPC分类号： G02B6/02042 ,  C03B37/01222 ,  C03B37/02754 ,  C03B2201/02 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2203/26 ,  C03B2203/34 ,  C03B2205/14

摘要： Provided is a method of producing a preform 10P for a coupled multi-core fiber including: an arranging process P1 for arranging a plurality of core glass bodies 11R and a clad glass body 12R in such a way that the plurality of core glass bodies 11R are surrounded by the clad glass body 12R; and a collapsing process P2 for collapsing a gap between the core glass bodies 11R and the clad glass body 12R, wherein the respective core glass bodies 11R have outer regions 16 having a predetermined thickness from the periphery surfaces and made of silica glass undoped with germanium, and the clad glass body 12R is made of silica glass having a refractive index lower than a refractive index of the outer regions of the core glass bodies 11R.

摘要翻译： 提供一种制造用于耦合的多芯光纤的预成型件10P的方法，包括：布置过程P1，其布置多个芯玻璃体11R和包层玻璃体12R，使得多个芯玻璃体11R为 被包层玻璃体12R包围; 以及用于塌缩芯玻璃体11R与包层玻璃体12R之间的间隙的塌陷处理P2，其中各个芯玻璃体11R具有从外围表面预定厚度的外部区域16，并且由锗未掺杂的石英玻璃制成， 并且包层玻璃体12R由折射率低于芯玻璃体11R的外部区域的折射率的石英玻璃制成。

公开(公告)号：US20130044988A1

公开(公告)日：2013-02-21

申请号：US13587173

申请日：2012-08-16

申请人： Shoji Tanigawa ,  Katsuhiro Takenaga

发明人： Shoji Tanigawa ,  Katsuhiro Takenaga

IPC分类号： G02B6/036

CPC分类号： G02B6/02042 ,  C03B37/01222 ,  C03B2201/86 ,  C03B2203/22 ,  C03B2203/26 ,  C03B2203/34 ,  G02B6/0288 ,  G02B6/03633 ,  G02B6/14 ,  G02B6/2804

摘要： A coupled multi-core fiber 10 includes a plurality of cores 11 and a clad 12 surrounding the plurality of cores 11, wherein the plurality of cores 11 are arranged in such a way that periphery surfaces of the adjacent cores 11 contact with each other, each of the cores 11 is made to have a refractive index higher than the clad 12 and includes: an outer region 16 having a predetermined thickness from the periphery surface; and an inner region 15 made to have a higher refractive index than the outer region 16 and surrounded by the outer region 16.

摘要翻译： 耦合的多芯光纤10包括多个芯11和围绕多个芯11的包层12，其中多个芯11以相邻芯11的周边表面彼此接触的方式布置，每个 芯11的折射率高于包层12，并且包括：具有从外围表面预定厚度的外部区域16; 以及具有比外部区域16更高的折射率并被外部区域16包围的内部区域15。

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％。