公开(公告)号：US11834364B2

公开(公告)日：2023-12-05

申请号：US16637368

申请日：2018-05-31

Applicant: FUJIKURA LTD.

Inventor： Itaru Ishida

IPC: C03B37/035 ,  C03B37/027

CPC classification number: C03B37/027 ,  C03B37/035

Abstract: A non-contact direction changer includes: a guide groove that guides an optical fiber and changes a direction of advancement of the optical fiber from a first direction to a second direction; a bottom ejection opening at a bottom of the guide groove; and one or more side ejection openings on at least one of opposite side surfaces of the guide groove. A fluid is ejected into the guide groove through the bottom ejection opening. A fluid is ejected into the guide groove through the one or more side ejection openings.

公开(公告)号：US20200180996A1

公开(公告)日：2020-06-11

申请号：US16637368

申请日：2018-05-31

Applicant: FUJIKURA LTD.

Inventor： Itaru Ishida

IPC: C03B37/027 ,  C03B37/035

Abstract: A non-contact direction changer includes: a guide groove that guides an optical fiber and changes a direction of advancement of the optical fiber from a first direction to a second direction; a bottom ejection opening at a bottom of the guide groove; and one or more side ejection openings on at least one of opposite side surfaces of the guide groove. A fluid is ejected into the guide groove through the bottom ejection opening. A fluid is ejected into the guide groove through the one or more side ejection openings.

公开(公告)号：US09252872B2

公开(公告)日：2016-02-02

申请号：US13923990

申请日：2013-06-21

Applicant: FUJIKURA LTD. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hiroki Hamaguchi ,  Shoichiro Matsuo ,  Itaru Ishida ,  Yukihiro Goto ,  Kazuhide Nakajima

IPC: H04B10/08 ,  H04B10/079 ,  G02B6/02 ,  H04B10/071

CPC classification number: H04B10/0795 ,  G02B6/02042 ,  H04B10/071

Abstract: For example, of a first intensity distribution waveform WF1 indicated by a distance distribution of an intensity of light which returns to one end of a core of a multicore fiber, and a second intensity distribution waveform WF2 indicated by a distance distribution of an intensity of light which returns to the other end of the core, the second intensity distribution waveform WF2 is inverted. Further, for example, an inverted intensity distribution waveform WF3 which is inverted and the first intensity distribution waveform WF1 which is not inverted are added.

Abstract translation: 例如，由返回到多芯光纤的芯的一端的光的强度的距离分布表示的第一强度分布波形WF1和由光强度的距离分布表示的第二强度分布波形WF2 其返回到核心的另一端，第二强度分布波形WF2被反转。 此外，例如，反相的反转强度分布波形WF3和未反转的第一强度分布波形WF1相加。

公开(公告)号：US20240418952A1

公开(公告)日：2024-12-19

申请号：US18697954

申请日：2022-09-30

Applicant: Fujikura Ltd.

Inventor： Noriaki Yamashita ,  Itaru Ishida ,  Ken Osato

IPC: G02B6/44

Abstract: An optical fiber ribbon includes optical fibers disposed in a disposition direction perpendicular to a longitudinal direction of the optical fiber ribbon and connection parts each disposed between and connecting two or more of the optical fibers adjacent in the disposition direction. The connection parts are disposed intermittently in the longitudinal direction and the disposition direction. The optical fiber ribbon has a first high-density region and a low-density region adjacent in the longitudinal direction. Two or more of the connection parts, having different positions from each other in the longitudinal direction and the disposition direction, are disposed in the first high-density region. A number density of the connection parts in the low-density region is lower than a number density of the connection parts in the first high-density region.

公开(公告)号：US11306025B2

公开(公告)日：2022-04-19

申请号：US16477696

申请日：2018-02-08

Applicant: FUJIKURA LTD.

Inventor： Itaru Ishida

IPC: C03B37/025 ,  C03C25/106 ,  C03C25/12 ,  C03C25/26

Abstract: An optical fiber manufacturing method includes: drawing an optical fiber preform to form a bare optical fiber; cooling the bare optical fiber; coating an uncured coating layer that includes a resin precursor on an outer periphery of the bare optical fiber; curing the uncured coating layer to form a semi-cured coating layer; further curing the semi-cured coating layer; and cooling the semi-cured coating layer by at least one non-contact direction changer between the curing of the uncured coating layer and the curing of the semi-cured coating layer.

公开(公告)号：US20200048138A1

公开(公告)日：2020-02-13

申请号：US16489465

申请日：2018-02-06

Applicant: FUJIKURA LTD.

Inventor： Itaru Ishida

IPC: C03B37/025 ,  C03C25/106 ,  C03C25/12

Abstract: An optical fiber manufacturing method includes: drawing an optical fiber preform to form a bare optical fiber; cooling the bare optical fiber by a non-contact direction changer; adjusting a temperature of the bare optical fiber in a temperature adjusting unit disposed downstream of the non-contact direction changer and upstream of a coating unit; disposing, in the coating unit, an uncured coating layer that comprises a resin precursor on an outer periphery of the bare optical fiber; and curing the uncured coating layer in a curing unit.

公开(公告)号：US20240319463A1

公开(公告)日：2024-09-26

申请号：US18578638

申请日：2022-04-25

Applicant: Fujikura Ltd.

Inventor： Noriaki Yamashita ,  Itaru Ishida ,  Ken Osato

IPC: G02B6/44

CPC classification number: G02B6/4403

Abstract: An optical fiber ribbon includes five or more optical fibers disposed in a disposition direction perpendicular to a longitudinal direction of the optical fiber ribbon and connection parts disposed intermittently in the longitudinal and disposition directions. Each of the connection parts is disposed between and connects adjacent ones of the optical fibers. The optical fiber ribbon has a first high-density region and a first low-density region disposed at different positions in the longitudinal direction and a second high-density region and a second low-density region disposed at different positions in the longitudinal direction. At least two of the connection parts having different positions from each other in the longitudinal and disposition directions are disposed in the first high-density region. At least another two of the connection parts having different positions from each other in the longitudinal and disposition directions are disposed in the second high-density region.

公开(公告)号：US09733424B2

公开(公告)日：2017-08-15

申请号：US14703003

申请日：2015-05-04

Applicant: FUJIKURA LTD.

Inventor： Itaru Ishida ,  Shoichiro Matsuo

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

CPC classification number: G02B6/02042 ,  C03B37/01222 ,  C03B37/01225 ,  C03B37/01231 ,  C03B37/027 ,  C03B2203/02 ,  C03B2203/10 ,  C03B2203/34

Abstract: A multicore fiber according to an embodiment of the present invention includes a plurality of cores and a cladding that encloses the plurality of the cores. The external form of the cladding in a cross section is formed of an arc portion that is formed in an arc shape relative to the center axis of the cladding and a non-arc portion that is pinched between two ends of the arc portion and not formed in an arc shape relative to the center axis of the cladding. The non-arc portion is formed with a pair of projections projecting from two ends of the arc portion on the opposite side of the center axis relative to a straight line connecting the both ends of the arc portion and one or more of recesses pinched between the pair of the projections.

公开(公告)号：US09405060B2

公开(公告)日：2016-08-02

申请号：US14833320

申请日：2015-08-24

Applicant: FUJIKURA LTD.

Inventor： Itaru Ishida

IPC: G02B6/44 ,  G02B6/02

CPC classification number: G02B6/02042 ,  G02B6/443 ,  G02B6/4432 ,  G02B6/4478

Abstract: An optical fiber cable includes a tubular sheath and a plurality of optical fibers disposed in the space of the sheath as the optical fibers are bent. In the plurality of optical fibers, at least one optical fiber is a multicore fiber. The multicore fiber satisfies an expression RPk

Abstract translation: 当光纤弯曲时，光纤电缆包括管状护套和布置在护套空间中的多根光纤。 在多根光纤中，至少一根光纤是多芯光纤。 多核纤维满足表达式RPk

公开(公告)号：US09291768B2

公开(公告)日：2016-03-22

申请号：US14549056

申请日：2014-11-20

Applicant: FUJIKURA LTD.

Inventor： Itaru Ishida ,  Shoichiro Matsuo

IPC: G02B6/02 ,  G02B6/036

CPC classification number: G02B6/02042 ,  G02B6/03633

Abstract: A multicore fiber according to an aspect of the present invention includes a plurality of cores and a cladding surrounding the plurality of the cores. In this multicore fiber, a pair of cores is arranged and disposed on a linear line passed through the center of the cladding, the pair of the cores being adjacent to each other and having refractive indexes varied differently from the cladding to the cores.

Abstract translation: 根据本发明的一个方面的多芯光纤包括多个芯和围绕多个芯的包层。 在这种多芯光纤中，一对芯被布置并布置在穿过包层中心的线性线上，该对芯彼此相邻并具有与包层不同的变化的折射率。