公开(公告)号：US20230011146A1

公开(公告)日：2023-01-12

申请号：US17932573

申请日：2022-09-15

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kengo WATANABE ,  Mitsuhiro IWAYA ,  Masayoshi TSUKAMOTO ,  Katsuki SUEMATSU

IPC: G02B6/38

Abstract: The present disclosure relates to an optical connector includes at least one optical fiber; and a lens element including at least one lens that couples light to an end face of the optical fiber. The distance FLh between the end face of the optical fiber and a vertex of the lens is expressed by the sum of the distance FL from the vertex of the lens to the focal point F positioned in a back face direction of the lens and the length δ between the end face of the optical fiber and the focal point F, and the length δ is longer than 10 μm.

公开(公告)号：US20220003634A1

公开(公告)日：2022-01-06

申请号：US17478120

申请日：2021-09-17

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Yoshiki NOMURA ,  Kengo WATANABE ,  Shunichi MATSUSHITA

IPC: G01M11/00

Abstract: An optical fiber state detection system includes: a first light source that outputs a monitor-related light for monitoring a state of an optical fiber; a reflection mechanism that reflects the monitor-related light propagated through the optical fiber; a light receiving part that receives a reflected light reflected by the reflection mechanism; a tap coupler provided between the reflection mechanism and both the first light source and the light receiving part such that the first light source and the light receiving part are connected the tap coupler; and a control part. Further, when the control part detects that a received optical power of the reflected light is greater than 0 and lower than a predetermined threshold value, the control part outputs information on a decrease in the received optical power to outside.

公开(公告)号：US20220381992A1

公开(公告)日：2022-12-01

申请号：US17819027

申请日：2022-08-11

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Yoshiki NOMURA ,  Ryo KAWAHARA ,  Kyosuke YAMAUCHI ,  Shunichi MATSUSHITA ,  Kengo WATANABE

IPC: G02B6/38 ,  G01M11/00

Abstract: An optical fiber connection state determination system determines a state of connection between a first optical fiber configured to propagate a test light input from a light source and a second optical fiber in a connector configured to detachably connect an output side from which the test light is output in the first optical fiber and an input side of the second optical fiber to which the test light propagated by the first optical fiber and output from the first optical fiber is input, and includes: a measurement unit configured to measure an intensity of a reflected light reflected and propagating thorough the first optical fiber in the test light; and a determination unit configured to determine the state of connection between the first optical fiber and the second optical fiber in the connector based on the intensity measured by the measurement unit.

公开(公告)号：US20140010501A1

公开(公告)日：2014-01-09

申请号：US14021680

申请日：2013-09-09

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Tsunetoshi SAITO ,  Kengo WATANABE

IPC: G02B6/02

CPC classification number: G02B6/02042 ,  G02B6/2551 ,  G02B6/3885 ,  G02B6/403

Abstract: A multicore fiber has a plurality of cores formed at predetermined distances and surrounded by a cladding. A bundle structure includes optical fibers joined in a close-packed arrangement. Specifically, one optical fiber is arranged at a center, and six optical fibers are arranged around the optical fiber arranged at the center. Accordingly, cores of the optical fibers are arranged at equal distances. The optical fibers are bonded together with an adhesive. Accordingly, claddings of adjacent optical fibers are in contact with each other either directly or via the adhesive. The adhesive also fills spaces between the optical fibers.

Abstract translation: 多芯光纤具有以预定距离形成并被包层围绕的多个芯。 束结构包括以紧密堆积布置连接的光纤。 具体地说，一个光纤布置在中心，并且在布置在中心的光纤周围布置了六根光纤。 因此，光纤的芯部以相等的距离排列。 光纤用粘合剂粘合在一起。 因此，相邻光纤的包层直接或经由粘合剂彼此接触。 粘合剂还填充光纤之间的空间。

公开(公告)号：US20210135422A1

公开(公告)日：2021-05-06

申请号：US17148645

申请日：2021-01-14

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Noriyuki YOKOUCHI ,  Kengo WATANABE

IPC: H01S3/067 ,  H01S3/081

Abstract: An optical power transmission apparatus includes: a light emitting unit including a first optical gain generating means and a first light reflecting means; an optical fiber; a second light reflecting means; and a light receiving means. Further, the second light reflecting means is arranged nearer to the light receiving means than the optical fiber is, a first laser resonator is formed, between the first light reflecting means and the second light reflecting means, by optical connection between the first optical gain generating means and the optical fiber, and first laser light generated by the first laser resonator is configured to be incident on the light receiving means.

公开(公告)号：US20160231511A1

公开(公告)日：2016-08-11

申请号：US15134343

申请日：2016-04-20

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kengo WATANABE ,  Tsunetoshi SAITO

IPC: G02B6/38 ,  G02B6/02

CPC classification number: G02B6/3885 ,  G02B6/02042 ,  G02B6/04 ,  G02B6/3863 ,  G02B6/3882 ,  G02B6/403

Abstract: In the present invention, a connector structure comprises a multi-core fiber and a ferrule. The multi-core fiber comprises a plurality of cores and a cladding that surrounds the cores. The ferrule holds the multi-core fiber. A tip of the multi-core fiber protrudes from an end face of the ferrule. A relation Δ≦14.8/a is satisfied. In the formula, Δ(μm) is a difference between a maximum protrusion height and a minimum protrusion height from an end face of the ferrule in a reference circle at the tip of the multi-core fiber. The reference circle is a minimum circle that includes all mode field diameters of the plurality of the cores having a center of cross section of the multi-core fiber as its center. And a(μm) is a radius of the reference circle.

Abstract translation: 在本发明中，连接器结构包括多芯光纤和套圈。 多芯光纤包括多个芯和围绕芯的包层。 套圈保持多芯光纤。 多芯纤维的尖端从套圈的端面突出。 满足关系Δ≤14.8/ a。 在该公式中，Δ（μm）是在多芯光纤的尖端处的基准圆中的套圈的端面的最大突起高度和最小突出高度之间的差。 参考圆是包括以多芯纤维的横截面为中心的多个芯的所有模场直径的最小圆。 a（μm）是参考圆的半径。

公开(公告)号：US20150055923A1

公开(公告)日：2015-02-26

申请号：US14474177

申请日：2014-08-31

Applicant: FURUKAWA ELECTRIC CO.,LTD.

Inventor： Tsunetoshi SAITO ,  Katsunori IMAMURA ,  Kengo WATANABE

IPC: G02B6/255 ,  C03B37/012 ,  G02B6/02

CPC classification number: G02B6/2555 ,  C03B37/01222 ,  C03B2203/14 ,  C03B2203/34 ,  G02B6/02042 ,  G02B6/02338 ,  G02B6/2551

Abstract: A multicore fiber 1 includes a plurality of cores 3 disposed at predetermined intervals and surrounded by a cladding 5. The multicore fiber 1 also includes a marker 7 formed apart from the cores 3. The refractive index of the marker 7 is different from those of the cores 3 and the cladding 5. For example, the marker 7 may be made of a material having lower refractive index than that of the cladding 5. In this case, for example, the cores 3 may be made of germanium-doped quartz. The cladding 5 may be made of pure quartz. The marker 7 may be made of fluorine-doped quartz. Further, the marker 7 may be an empty hole.

Abstract translation: 多芯纤维1包括以预定间隔设置并被包层5包围的多个芯3.多芯纤维1还包括与芯3分开形成的标记7.标记7的折射率不同于 芯3和包层5.例如，标记7可以由折射率低于包层5的材料制成。在这种情况下，例如，芯3可以由锗掺杂的石英制成。 包层5可以由纯石英制成。 标记7可以由掺氟石英制成。 此外，标记物7可以是空洞。

公开(公告)号：US20170235061A1

公开(公告)日：2017-08-17

申请号：US15501395

申请日：2015-08-04

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kengo WATANABE ,  Tsunetoshi SAITO

IPC: G02B6/38 ,  G02B6/04 ,  G02B6/42 ,  G02B6/02

CPC classification number: G02B6/3885 ,  G02B6/02042 ,  G02B6/04 ,  G02B6/3672 ,  G02B6/40 ,  G02B6/4202

Abstract: This optical fiber connection structure connects a multicore fiber and a bundle structure bundling a plurality of optical fibers. The multicore fiber has a plurality of cores arranged in a lattice. The bundle structure includes closely packed optical fibers of the same diameter. The bundle structure is configured such that signal light optical fiber groups including signal light optical fibers and a dummy fiber group including dummy optical fibers are stacked in multiple layers. The signal light optical fiber groups are configured with the signal light optical fibers aligned in the mutually contacting direction. The signal light optical fiber groups and the dummy fiber group are stacked orthogonal to the alignment direction of the optical fibers constituting the respective fiber groups.

公开(公告)号：US20170168247A1

公开(公告)日：2017-06-15

申请号：US15443987

申请日：2017-02-27

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kengo WATANABE ,  Tsunetoshi SAITO ,  Katsuki SUEMATSU ,  Mitsuhiro IWAYA ,  Kohei KAWASAKI ,  Masahito MORIMOTO

IPC: G02B6/38

CPC classification number: G02B6/3885 ,  G02B6/3834 ,  G02B6/3839 ,  G02B6/3843 ,  G02B6/40

Abstract: A plurality of holes are formed in a ferrule. The holes are at sites penetrated by the tips of optical fibers. An opening is formed in the upper surface of the ferrule and an internal housing section is exposed from the opening. The housing section is at a site at which an optical fiber holding member is housed. The optical fibers are held by the optical fiber holding member. The optical fibers are multi-core fibers. In other words, the optical fibers have a specified axis of symmetry in a cross-section vertical to the longitudinal direction of the optical fibers and have orientation relative to a rotation direction having the longitudinal direction as the axis thereof.

公开(公告)号：US20160020573A1

公开(公告)日：2016-01-21

申请号：US14834448

申请日：2015-08-25

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kengo WATANABE ,  Tsunetoshi SAITO ,  Yukihiro TSUCHIDA ,  Koichi MAEDA ,  Katsunori IMAMURA

IPC: H01S3/067 ,  H01S3/094 ,  G02B6/40 ,  G02B6/255

CPC classification number: H01S3/094042 ,  G02B6/02042 ,  G02B6/2552 ,  G02B6/2856 ,  G02B6/40 ,  H01S3/06737 ,  H01S3/06745 ,  H01S3/06783 ,  H01S3/094003 ,  H01S3/1608

Abstract: An optical-fiber-bundle structure is connected to one end of a multi-core fiber. The multi-core fiber has a tapered section formed therein. The outside diameter of the multi-core fiber and the core pitch thereof decrease in the tapered section. It is possible for the multi-core fiber to have an increasing core pitch on the connection-side thereof which connects to the optical-fiber-bundle structure; hence, it is possible to use an easy-to-use large-diameter optical fiber as the optical fiber to be provided in the optical-fiber-bundle structure. When connecting another multi-core fiber to the other end of the multi-core fiber, it is possible to match the outer diameters thereof; hence, when fusion splicing to one another, it is unlikely for a positional shift of the cores to occur.

Abstract translation: 光纤束结构连接到多芯光纤的一端。 多芯纤维在其中形成有锥形部。 多芯纤维的外径和芯间距在锥形部分中减小。 多芯光纤在与光纤束结构连接的连接侧上具有增加的芯间距， 因此，可以使用易于使用的大直径光纤作为光纤束结构中设置的光纤。 当将多芯纤维连接到多芯光纤的另一端时，可以匹配其多芯纤维的外径; 因此，当熔接彼此时，不可能使芯发生位置偏移。