公开(公告)号：US08750663B2

公开(公告)日：2014-06-10

申请号：US13587173

申请日：2012-08-16

Applicant: Shoji Tanigawa ,  Katsuhiro Takenaga

Inventor： Shoji Tanigawa ,  Katsuhiro Takenaga

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

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

Abstract: 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.

Abstract translation: 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：US07831121B2

公开(公告)日：2010-11-09

申请号：US12430986

申请日：2009-04-28

Applicant: Ning Guan ,  Katsuhiro Takenaga ,  Kuniharu Himeno

Inventor： Ning Guan ,  Katsuhiro Takenaga ,  Kuniharu Himeno

IPC: G02B6/036

CPC classification number: G02B6/02347 ,  G02B6/02328 ,  G02B6/02333 ,  G02B6/02338

Abstract: An extended triangular lattice type photonic bandgap fiber, includes a cladding and a capillary core, the cladding having a plurality of holes disposed within a silica glass portion in a longitudinal direction of the fiber and arranged in an extended triangular lattice shape, the capillary core having a plurality of holes arranged in a triangular lattice shape, wherein the cross-sectional area of the respective holes in the capillary core is smaller than that of the respective holes in the cladding.

Abstract translation: 一种扩展的三角格子型光子带隙光纤，包括包层和毛细芯，所述包层具有多个孔，所述多个孔沿着所述纤维的长度方向设置在石英玻璃部内，并且布置成延伸的三角形格子状，所述毛细芯具有 布置成三角形格子形状的多个孔，其中毛细管芯中各个孔的横截面面积小于包层中相应孔的横截面面积。

公开(公告)号：US07551824B2

公开(公告)日：2009-06-23

申请号：US11693509

申请日：2007-03-29

Applicant: Ning Guan ,  Katsuhiro Takenaga ,  Kuniharu Himeno

Inventor： Ning Guan ,  Katsuhiro Takenaga ,  Kuniharu Himeno

IPC: G02B6/036

CPC classification number: G02B6/02347 ,  G02B6/02328 ,  G02B6/02333 ,  G02B6/02338

Abstract: An extended triangular lattice type photonic bandgap fiber, includes a cladding and a capillary core, the cladding having a plurality of holes disposed within a silica glass portion in a longitudinal direction of the fiber and arranged in an extended triangular lattice shape, the capillary core having a plurality of holes arranged in a triangular lattice shape, wherein the cross-sectional area of the respective holes in the capillary core is smaller than that of the respective holes in the cladding.

Abstract translation: 一种扩展的三角格子型光子带隙光纤，包括包层和毛细芯，所述包层具有多个孔，所述多个孔沿着所述纤维的长度方向设置在石英玻璃部内，并且布置成延伸的三角形格子状，所述毛细芯具有 布置成三角形格子形状的多个孔，其中毛细管芯中各个孔的横截面面积小于包层中相应孔的横截面面积。

公开(公告)号：US20080170830A1

公开(公告)日：2008-07-17

申请号：US11623644

申请日：2007-01-16

Applicant: Ning Guan ,  Katsuhiro Takenaga ,  Kuniharu Himeno

Inventor： Ning Guan ,  Katsuhiro Takenaga ,  Kuniharu Himeno

IPC: G02B6/032 ,  C03B37/022

CPC classification number: C03B37/01208 ,  C03B37/01248 ,  C03B2203/14 ,  C03B2203/16 ,  C03B2203/42 ,  G02B6/02328 ,  G02B6/02333 ,  G02B6/02338 ,  G02B6/02347

Abstract: A photonic band gap fiber is provided having multiple air holes in a silica portion extending in the longitudinal direction of the fiber. The fiber includes a cladding containing an air hole periodic structure in an extended triangular lattice configuration, wherein first rows each having a number of air holes at a first pitch are arranged alternately in the cross section of the fiber with multiple second rows of air holes each with multiple air holes at a second pitch which is twice the first pitch. The fiber further includes an air hole core.

Abstract translation: 光纤带隙光纤被提供为具有沿着光纤的纵向方向延伸的二氧化硅部分中的多个气孔。 纤维包括包含延伸的三角形格子构造的气孔周期性结构的包层，其中在纤维的横截面中交替地布置了具有第一节距的多个气孔的第一排，每排具有多个第二排气孔 具有第二间距的多个气孔，其是第一节距的两倍。 纤维还包括气孔芯。

公开(公告)号：US20070159620A1

公开(公告)日：2007-07-12

申请号：US10587303

申请日：2005-01-26

Applicant: Katsuhiro Takenaga

Inventor： Katsuhiro Takenaga

IPC: G01N21/00

CPC classification number: G01M11/30

Abstract: A method for measuring a multimode optical fiber comprises: monitoring a temperature change within a measurement time in a DMD measurement of the multimode optical fiber, wherein the DMD measurement is carried out in an environment in which a magnitude of temperature change is controlled.

Abstract translation: 一种用于测量多模光纤的方法，包括：在多模光纤的DMD测量中监测测量时间内的温度变化，其中DMD测量在控制温度变化幅度的环境中进行。

公开(公告)号：US08718468B2

公开(公告)日：2014-05-06

申请号：US13344942

申请日：2012-01-06

Applicant: Katsuhiro Takenaga ,  Ning Guan

Inventor： Katsuhiro Takenaga ,  Ning Guan

IPC: H04B17/00

CPC classification number: G02B6/02042 ,  G02B6/4246 ,  H04B10/2581

Abstract: There is provided an optical fiber communication system restricting enlargement of the diameter of an optical fiber as well as enabling achievement of a large-capacity optical communication with a small number of optical fibers.An optical fiber communication system 100 includes an optical transmitter 10 transmitting a plurality of optical signals in parallel, a multicore fiber 20 in which outer circumferences of a plurality of cores are covered with a common clad, and the respective optical signals transmitted in parallel from the optical transmitter 10 are input into the cores, and an optical receiver 30 receiving the optical signals output in parallel from the respective cores of the multicore fiber, wherein the optical transmitter 10 and the optical receiver 30 perform a MIMO communication.

Abstract translation: 提供了限制光纤直径扩大的光纤通信系统，并且能够实现与少量光纤的大容量光通信。 光纤通信系统100包括并行发送多个光信号的光发送器10，多芯光纤20，其中多个芯的外周被公共包层覆盖，并且从多个光纤中并行传输的各个光信号 光发射器10被输入到核心，以及光接收器30，其接收从多芯光纤的各个核并行输出的光信号，其中光发射机10和光接收机30执行MIMO通信。

公开(公告)号：US08285094B2

公开(公告)日：2012-10-09

申请号：US13403539

申请日：2012-02-23

Applicant: Katsuhiro Takenaga ,  Ning Guan ,  Syouji Tanigawa

Inventor： Katsuhiro Takenaga ,  Ning Guan ,  Syouji Tanigawa

IPC: G02B6/44

CPC classification number: G02B6/02042

Abstract: The multicore fiber comprises 7 or more cores, wherein diameters of the adjacent cores differ from one another, wherein each of the cores performs single-mode propagation, wherein a relative refractive index difference of each of the cores is less than 1.4%, wherein a distance between the adjacent cores is less than 50 μm, wherein, in a case where a transmission wavelength of each of the cores is λ, the distance between the adjacent cores is , a mode field diameter of each of the cores is MFD, and a theoretical cutoff wavelength of each of the cores is λc, (/MFD)·(2λc/(λc+λ))≧3.95 is satisfied, and wherein a distance between the outer circumference of the coreand an outer circumference of the clad is 2.5 or higher times as long as the mode field diameter of each of the cores.

Abstract translation: 多芯纤维包括7个或更多个芯，其中相邻芯的直径彼此不同，其中每个芯执行单模传播，其中每个芯的相对折射率差小于1.4％，其中 相邻芯之间的距离小于50μm，其中，在每个芯的透射波长为λ的情况下，相邻芯之间的距离为每个芯的模场直径为MFD，并且 每个芯的理论截止波长为λc，（/MFD）·（2λc/（λc+λ））≥3.95满足，并且其中芯的外周与包层的外周之间的距离为2.5或 只要每个芯的模场直径就更长。

公开(公告)号：US20110286474A1

公开(公告)日：2011-11-24

申请号：US13168660

申请日：2011-06-24

Applicant: Katsuhiro Takenaga

Inventor： Katsuhiro Takenaga

IPC: H01S3/30

CPC classification number: H01S3/302 ,  A61B18/22 ,  G02B6/02361 ,  G02B6/0238 ,  H01S3/0064 ,  H01S3/0092 ,  H01S3/06741 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/06791

Abstract: Provided is a fiber laser device capable of preventing laser light from damaging a laser oscillator even if the laser light is reflected by an object to be irradiated or at an output end.The fiber laser device includes: a laser oscillator 10 configured to emit laser light having a first wavelength; a first optical filter 20 configured to transmit the laser light having the first wavelength; a wavelength converter 30 configured to generate laser light having a second wavelength using stimulated Raman scattering caused by the laser light having the first wavelength and transmit the laser light having the first wavelength and the laser light having the second wavelength; a second optical filter 40 configured to transmit the laser light having the second wavelength and prevent transmission of laser light having the first wavelength; an optical fiber amplifier 50 configured to amplify the laser light having the second wavelength; and an output end 60 through which the laser light having the second wavelength is output. The first optical filter 20 is configured to prevent transmission of the laser light having the second wavelength, and the first optical filter 20, the wavelength converter 30 and the second optical filter 40 are each constituted by a photonic band gap fiber.

Abstract translation: 提供一种光纤激光装置，即使激光被被照射物体或输出端反射也能够防止激光振荡。 光纤激光器件包括：激光振荡器10，被配置为发射具有第一波长的激光; 配置为透射具有第一波长的激光的第一滤光器20; 波长转换器30，被配置为使用由具有第一波长的激光引起的受激拉曼散射产生具有第二波长的激光，并传输具有第一波长的激光和具有第二波长的激光; 第二滤光器40，被配置为透射具有第二波长的激光，并防止具有第一波长的激光的透射; 被配置为放大具有第二波长的激光的光纤放大器50; 以及输出具有第二波长的激光的输出端60。 第一滤光器20被配置为防止具有第二波长的激光的透射，并且第一滤光器20，波长转换器30和第二滤光器40均由光子带隙光纤构成。

公开(公告)号：US07292762B2

公开(公告)日：2007-11-06

申请号：US11178477

申请日：2005-07-12

Applicant: Ning Guan ,  Katsuhiro Takenaga ,  Katsuaki Izoe ,  Kazuhiko Aikawa ,  Kuniharu Himeno

Inventor： Ning Guan ,  Katsuhiro Takenaga ,  Katsuaki Izoe ,  Kazuhiko Aikawa ,  Kuniharu Himeno

IPC: G02B6/032

CPC classification number: G02B6/02333 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/14

Abstract: A hole-assisted holey fiber is provided. The holey fiber includes a core region; a cladding region around the core region, and a plurality of holes in the cladding region around the core region. The core region has a higher refractive index than that of the cladding region. The holes form an inner hole layer and an outer hole layer, and the inner hole layer has the same number of holes as the number of the holes in the outer hole layer. The outer layer holes are provided in locations in which inner holes are absent when viewed from the center of the core region, and holes defining the same layer have the same diameter. A distance Λ1 from a center of the core region to a center of an inner hole and a distance Λ2 from the center of the core region to a center of an outer hole satisfy the relationship Λ1

Abstract translation: 提供孔辅助多孔纤维。 多孔纤维包括芯区域; 围绕芯区域的包层区域，以及围绕芯区域的包层区域中的多个孔。 芯区域具有比包层区域更高的折射率。 孔形成内孔层和外孔层，内孔层的孔数与外孔层的孔数相同。 外层孔设置在从芯区域的中心观察时不存在内孔的位置，并且限定相同层的孔具有相同的直径。 从芯部区域的中心到内部孔的中心距离λ1到从芯部区域的中心到外部中心的距离λ2<2 < 孔的内径满足关系Lambda 1 N 2 N 2和内孔的直径d 1 N 2，直径d 2 < SUB>满足关系d 1 > = d 2 2。

公开(公告)号：US20050013570A1

公开(公告)日：2005-01-20

申请号：US10891177

申请日：2004-07-15

Applicant: Ning Guan ,  Katsuhiro Takenaga ,  Kuniharu Himeno

Inventor： Ning Guan ,  Katsuhiro Takenaga ,  Kuniharu Himeno

IPC: G02B6/028 ,  G02B6/02 ,  G02B6/18

CPC classification number: G02B6/0288

Abstract: A graded-index multimode fiber includes a core containing fluorine and a cladding which is provided at an outer periphery of the core, and the fiber has a refractive index profile which satisfies the following Formula (1): n ⁡ ( r ) = { n 1 ⁡ [ 1 - 2 ⁢   ⁢ Δ ⁢   ⁢ ( r a ) α ] 1 / 2 ( O ≤ r ≤ a ) n 1 ⁡ ( 1 - 2 ⁢   ⁢ Δ ) 1 / 2 ( r > a ) ( 1 ) where n(r) is a refractive index of the optical fiber at a distance “r” from the center of the core, n1 is a refractive index at the center of the core, Δ is a relative refractive index difference of the center of the core with respect to the cladding, “a” is a core radius, and α is a refractive index profile exponential parameter.