公开(公告)号：US20190072712A1

公开(公告)日：2019-03-07

申请号：US16174841

申请日：2018-10-30

Applicant: FUJIKURA LTD. ,  NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY

Inventor： Katsuhiro Takenaga ,  Shoichiro Matsuo ,  Yusuke Sasaki ,  Kunimasa Saitoh

IPC: G02B6/02 ,  G02B6/036

CPC classification number: G02B6/02042 ,  G02B6/02014 ,  G02B6/02019 ,  G02B6/02366 ,  G02B6/02395 ,  G02B6/0365

Abstract: A multicore fiber for communication 10 which allows propagation of an optical signal includes: a clad 12;a core 11a which is arranged in a center of the clad 12; and seven to ten cores 11b which are arranged at equal intervals surrounding the core 11a, and the cladding diameter is 230 μm, distances between centers of the mutually neighboring cores 11a and 11b are 30 μm or more, distances between the centers of the cores 11b and an outer peripheral surface of the clad 12 are 35 μm or more and a mode field diameter of light propagating in the cores 11a and 11b is 9 μm to 13 μm.

公开(公告)号：US20180224613A1

公开(公告)日：2018-08-09

申请号：US15889931

申请日：2018-02-06

Applicant: FUJIKURA LTD.

Inventor： Kazuhiro Goi ,  Katsuhiro Takenaga

IPC: G02B6/42

CPC classification number: G02B6/4216 ,  G02B6/02042 ,  G02B6/024 ,  G02B6/28 ,  G02B6/2804 ,  G02B6/34 ,  G02B6/4213 ,  G02B6/4214 ,  G02B6/4246 ,  H04B10/40

Abstract: An optical transmission device includes a plurality of transmitting/receiving units provided on a substrate, each transmitting/receiving unit includes: an optical transmitter; an optical receiver; a polarization combiner/splitter; and a connection portion. In the connection portions which are arranged at the positions symmetrical to each other, a direction opposite, with respect to a virtual symmetry axis, to a direction of a main electric field on a plane perpendicular to an emission direction of an optical wave of the connection portion which is emitted from one of the connection portions to an outside is substantially orthogonal to a direction of a main electric field on a plane perpendicular to an emission direction of an optical wave of the connection portion which is emitted from the other of the connection portions to an outside.

公开(公告)号：US09515450B2

公开(公告)日：2016-12-06

申请号：US14440984

申请日：2013-10-31

Applicant: FUJIKURA LTD. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  OSAKA PREFECTURE UNIVERSITY PUBLIC CORPORATION ,  NATIONAL UNIVERSITY CORPORATION SHIMANE UNIVERSITY

Inventor： Shoichiro Matsuo ,  Katsuhiro Takenaga ,  Kentaro Ichii ,  Hirotaka Ono ,  Kyouzou Tsujikawa ,  Makoto Yamada ,  Hiroji Masuda

IPC: H01S3/067 ,  G02B6/02 ,  G02B6/036 ,  H01S3/094 ,  G02B6/04 ,  H01S3/23

CPC classification number: H01S3/06737 ,  G02B6/02042 ,  G02B6/036 ,  G02B6/03633 ,  G02B6/04 ,  H01S3/06733 ,  H01S3/06754 ,  H01S3/094007 ,  H01S3/2383

Abstract: A plurality of cores 51 is disposed around the center axis of a first cladding 52 in a state in which an inter-core distance Λ of cores adjacent to each other is equal, a refractive index n1 of the core 51 is provided higher than a refractive index n2 of the first cladding 52, and the refractive index n2 of the first cladding 52 is provided higher than a refractive index n3 of a second cladding 53. Moreover, 5.8≦Λ/MFD(2λc/(λc+λop))≦8 is satisfied, where the inter-core distance is defined as Λ, a mode field diameter of the core is defined as MFD, a cutoff wavelength is defined as λc, and a wavelength of communication light incident on the core 51 is defined as λop.

Abstract translation: 在彼此相邻的芯的芯间距离Λ相等的状态下，多个芯51围绕第一包层52的中心轴设置，芯51的折射率n1被设置为高于折射率 第一包层52的折射率n2和第一包层52的折射率n2被设置为高于第二包层53的折射率n3。此外，5.8≤Λ/ MFD（2λc/（λc+λop））≤8 其中芯间距离被定义为Λ，芯的模场直径被定义为MFD，截止波长被定义为λc，并且入射在芯51上的通信光的波长被定义为λop。

公开(公告)号：US09477035B2

公开(公告)日：2016-10-25

申请号：US14618147

申请日：2015-02-10

Applicant: FUJIKURA LTD. ,  NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY

Inventor： Hitoshi Uemura ,  Katsuhiro Takenaga ,  Kunimasa Saitoh

IPC: G02B6/028 ,  G02B6/036 ,  G02B6/02

CPC classification number: G02B6/02042 ,  G02B6/028 ,  G02B6/0286 ,  G02B6/0288 ,  G02B6/03611

Abstract: An optical device includes: multiple cores each including an inner core and an outer core surrounding an outer circumferential surface of the inner core without any gap therebetween; and cladding surrounding an outer circumferential surface of the cores without any gap therebetween and having a refractive index lower than that of the outer core, wherein each of the cores has a tapered portion that is tapered from one side toward the other side thereof in a longitudinal direction, each of the inner cores includes a low-refractive-index portion, and a high-refractive-index portion surrounding an outer circumferential surface of the low-refractive-index portion without any gap therebetween and having a refractive index higher than that of the low-refractive-index portion, and the outer core has a refractive index lower than that of the high-refractive-index portion.

Abstract translation: 光学装置包括：多个芯，每个芯包括内芯和围绕内芯的外周表面的外芯，其间没有任何间隙; 并且围绕芯的外周表面的包层，在其之间没有任何间隙，并且折射率低于外芯的折射率，其中每个芯具有从纵向方向的一侧朝向另一侧渐缩的锥形部分 每个内芯包括低折射率部分和围绕低折射率部分的外周表面的高折射率部分，其间没有任何间隙，并且折射率高于 低折射率部分和外芯的折射率低于高折射率部分的折射率。

公开(公告)号：US20160245994A1

公开(公告)日：2016-08-25

申请号：US15142246

申请日：2016-04-29

Applicant: FUJIKURA LTD. ,  NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY

Inventor： Katsuhiro Takenaga ,  Shoichiro Matsuo ,  Yusuke Sasaki ,  Kunimasa Saitoh

IPC: G02B6/02

CPC classification number: G02B6/02042 ,  G02B6/02014 ,  G02B6/02019 ,  G02B6/02366 ,  G02B6/02395 ,  G02B6/0365

Abstract: A multicore fiber for communication 10 which allows propagation of an optical signal includes: a clad 12; a core 11a which is arranged in a center of the clad 12; and seven to ten cores 11b which are arranged at equal intervals surrounding the core 11a, and the cladding diameter is 230 μm, distances between centers of the mutually neighboring cores 11a and 11b are 30 μm or more, distances between the centers of the cores 11b and an outer peripheral surface of the clad 12 are 35 μm or more and a mode field diameter of light propagating in the cores 11a and 11b is 9 μm to 13 μm.

公开(公告)号：US20160245993A1

公开(公告)日：2016-08-25

申请号：US15141945

申请日：2016-04-29

Applicant: FUJIKURA LTD. ,  NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY

Inventor： Katsuhiro Takenaga ,  Shoichiro Matsuo ,  Yusuke Sasaki ,  Kunimasa Saitoh

IPC: G02B6/02

CPC classification number: G02B6/02042 ,  G02B6/02014 ,  G02B6/02019 ,  G02B6/02366 ,  G02B6/02395 ,  G02B6/0365

Abstract: A multicore fiber for communication 10 which allows propagation of an optical signal includes: a clad 12; a core 11a which is arranged in a center of the clad 12; and seven to ten cores 11b which are arranged at equal intervals surrounding the core 11a, and the cladding diameter is 230 μm, distances between centers of the mutually neighboring cores 11a and 11b are 30 μm or more, distances between the centers of the cores 11b and an outer peripheral surface of the clad 12 are 35 μm or more and a mode field diameter of light propagating in the cores 11a and 11b is 9 μm to 13 μm.

Abstract translation: 用于通信的多芯光纤10，其允许光信号的传播包括：包层12; 布置在包层12的中心的芯11a; 以及围绕芯11a等间隔配置的7〜10个芯11b，包层直径为230μm，相互相邻的芯11a，11b的中心间距离为30μm以上，芯11b的中心间的距离 并且包层12的外周面为35μm以上，在芯11a，11b中传播的光的模场直径为9μm〜13μm。

公开(公告)号：US09229157B2

公开(公告)日：2016-01-05

申请号：US13851660

申请日：2013-03-27

Applicant: Fujikura Ltd. ,  National University Corporation Hokkaido University

Inventor： Shoji Tanigawa ,  Katsuhiro Takenaga ,  Masahiro Kashiwagi ,  Kunimasa Saitoh

IPC: G02B6/036 ,  G02B6/02 ,  H01S3/067 ,  G02B6/028

CPC classification number: G02B6/02009 ,  G02B6/02347 ,  G02B6/0281 ,  H01S3/06741

Abstract: A solid photonic band gap fiber includes: a core area located at a central portion of a cross-section with respect to a longitudinal direction of the fiber, the core area being formed of a solid substance having a low refractive index; cladding areas having base portions formed of a solid substance having a low refractive index, the cladding areas surrounding the core area; and a plurality of fine high refractive index scatterers provided in the cladding areas, and disposed in a dispersed manner so as to surround the core area, the number of fine high refractive index scatterers being formed of a solid substance having a high refractive index, wherein in a state that the solid photonic band gap fiber is held at a predetermined bending radius, propagation in a high-order mode is suppressed by using a difference in a bending loss between a fundamental mode and the high-order mode, and only the fundamental mode is substantially propagated, the fundamental mode and the high-order mode being caused by bending.

Abstract translation: 固体光子带隙光纤包括：芯部区域，其位于相对于纤维的纵向方向的横截面的中心部分处，芯部区域由具有低折射率的固体物质形成; 包层区，具有由具有低折射率的固体物质形成的基部，围绕芯区的包层区; 以及多个精细的高折射率散射体，其设置在包层区域中，并且以包围芯区域的分散方式设置，由高折射率的固体物质形成的细高折射率散射体的数量，其中 在固体光子带隙光纤被保持在预定的弯曲半径的状态下，通过使用基模和高阶模之间的弯曲损耗的差异来抑制高阶模的传播，并且仅基带 模式基本上被传播，基本模式和高阶模式是由弯曲引起的。

公开(公告)号：US20150318661A1

公开(公告)日：2015-11-05

申请号：US14441029

申请日：2013-10-31

Applicant: FUJIKURA LTD. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  OSAKA PREFECTURE UNIVERSITY PUBLIC CORPORATION ,  NATIONAL UNIVERSITY CORPORATION SHIMANE UNIVERSITY

Inventor： Shoichiro Matsuo ,  Katsuhiro Takenaga ,  Kentaro Ichii ,  Hirotaka Ono ,  Kyouzou Tsujikawa ,  Makoto Yamada ,  Hiroji Masuda

IPC: H01S3/067 ,  G02B6/036 ,  H01S3/091 ,  G02B6/02

CPC classification number: H01S3/06754 ,  G02B6/02042 ,  G02B6/03605 ,  G02B6/03611 ,  H01S3/06729 ,  H01S3/06733 ,  H01S3/06737 ,  H01S3/091 ,  H01S3/094007 ,  H01S3/2383

Abstract: The first cladding 52 has a two-layer structure formed of a solid inner layer 62A passed through the center axis of the first cladding 52 and an outer layer 62B enclosing the inner layer 62A and the plurality of cores 51 with no gap. A refractive index n1 of the core 51 is provided higher than refractive indexes n2A and n2B of the inner layer 62A and the outer layer 62B, the refractive indexes n2A and n2B of the inner layer 62A and the outer layer 62B are provided higher than a refractive index n3 of the second cladding 53, and the refractive index n2A of the inner layer 62A is provided lower than the refractive index n2B of the outer layer 62B.

Abstract translation: 第一包层52具有由穿过第一包层52的中心轴线的实心内层62A和不间隙地包围内层62A和多个芯51的外层62B形成的两层结构。 芯体51的折射率n1比内层62A和外层62B的折射率n2A，n2B高，内层62A和外层62B的折射率n2A，n2B高于屈光度 第二包层53的折射率n3和内层62A的折射率n2A被设定为低于外层62B的折射率n2B。

公开(公告)号：US20140003779A1

公开(公告)日：2014-01-02

申请号：US14016706

申请日：2013-09-03

Applicant: FUJIKURA LTD.

Inventor： Yoko Arakawa ,  Katsuhiro Takenaga

IPC: G02B6/02 ,  G02B6/46

CPC classification number: G02B6/02042 ,  G02B6/02395 ,  G02B6/0365 ,  G02B6/255 ,  G02B6/46 ,  Y10T29/49826

Abstract: A multi-core fiber includes a plurality of cores, a marker which is disposed to be parallel to the cores, and a clad which surrounds outer peripheral surfaces of the cores and the marker. The marker may propagate light having a wavelength which is the same as a wavelength of light which propagates in the core as single mode light.

Abstract translation: 多芯光纤包括多个芯，设置成与芯平行的标记，以及围绕芯和标记的外周表面的包层。 标记可以传播具有与在芯中传播的光的波长相同的波长的光作为单模光。

公开(公告)号：US20130312899A1

公开(公告)日：2013-11-28

申请号：US13782133

申请日：2013-03-01

Applicant: Fujikura Ltd.

Inventor： Yoko Arakawa ,  Katsuhiro Takenaga ,  Shoichiro Matsuo

IPC: B29C65/02

CPC classification number: B29C65/02 ,  G02B6/02042 ,  G02B6/2551

Abstract: A butting step S1 of butting end surfaces of multi-core fibers against each other by aligning central axes CA of clads 20 of the multi-core fibers to cause each core 11 of one multi-core fiber 1a and each core 11 of the other multi-core fiber 1b to face each other, and a fusing step S2 of fusing the multi-core fibers to each other by carrying out discharge by a pair of discharge electrodes 50a and 50b that sandwich a butted position of the multi-core fibers and face each other are provided. The fusing step S2 causes tips 51a and 51b of the discharge electrodes to perform reciprocating motion such that a straight line SL that connects the tips 51a and 51b of the discharge electrodes moves while describing a surface perpendicular to the central axes CA.

Abstract translation: 通过使多芯纤维的包层20的中心轴CA对齐，使得多芯纤维的端面对接，使多芯纤维的端面与多芯纤维1a的每个芯11和另一多芯纤维 芯纤维1b彼此面对;以及熔融步骤S2，通过由夹着多芯纤维的对接位置的一对放电电极50a和50b进行放电来使多芯光纤彼此熔合， 互相提供。 定影步骤S2使放电电极的尖端51a和51b进行往复运动，使得连接放电电极的尖端51a和51b的直线SL在描述与中心轴CA垂直的表面的同时移动。