公开(公告)号：US20240045152A1

公开(公告)日：2024-02-08

申请号：US17641052

申请日：2020-09-10

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yasunari TANAKA ,  Ryo KOYAMA ,  Masaaki TAKAYA ,  Yoshiteru ABE ,  Chisato FUKAI

IPC: G02B6/38 ,  G02B6/40

CPC classification number: G02B6/3838 ,  G02B6/403

Abstract: The present disclosure has an object to provide a multicore optical connector that can achieve size reduction and pitch reduction without performing highly accurate machining of V-grooves or the like. The present disclosure is a multicore optical connector including a holding member 11 having a flat bottom surface 14B, and provided with a groove that enables a plurality of optical fibers 91 to be arranged along the bottom surface 14B, the plurality of optical fibers 91 stored in a row on the bottom surface of the groove, and a lid 15 that is in contact with all the plurality of optical fibers 91 and is fixed to the plurality of optical fibers 91 and the holding member 11 in a state in which the plurality of optical fibers 91 are pressed against the bottom surface 14B of the groove to form a long hole 12 at the groove 14.

公开(公告)号：US20210341687A1

公开(公告)日：2021-11-04

申请号：US17285810

申请日：2019-10-09

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Masaaki TAKAYA ,  Kazunori KATAYAMA ,  Yoshiteru ABE ,  Ryo KOYAMA ,  Chisato FUKAI ,  Yusuke YAMADA

IPC: G02B6/40 ,  G02B6/38

Abstract: An object is to provide a multifiber optical connector and an optical cable connection method capable of reducing a connection time and reducing an installation space of a connection portion. The multifiber optical connector according to the present invention includes three position adjustment units, and performs rough alignment to fine alignment of optical fiber end faces by using sequentially these position adjustment units when optical cables are connected. The multifiber optical connector simultaneously connects the end faces of the plurality of optical fibers included in the optical cables, and thus, an extra optical fiber tape is not present, and a closure needed in the related art is not necessary.

公开(公告)号：US20240411089A1

公开(公告)日：2024-12-12

申请号：US18701750

申请日：2021-10-19

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Chisato FUKAI ,  Yoshiteru ABE ,  Kazunori KATAYAMA

IPC: G02B6/38 ,  G02B6/35 ,  G02B6/40

Abstract: An object of the present disclosure is to enable an optical switch capable of driving stable optical characteristics with respect to external factors with low power consumption to be achieved at low cost.
The present disclosure is an optical connection device that connects a first ferrule and a second ferrule, the optical connection device including: a cylindrical sleeve into which the first ferrule and the second ferrule are inserted; a spring that abuts a distal end portion of the first ferrule and a distal end portion of the second ferrule on each other; and a holder that holds the first ferrule, the second ferrule, the cylindrical sleeve, and the spring, in which the first ferrule or the second ferrule is movable in any direction perpendicular to a central axis in the holder, and is held by the holder so as not to rotate about the central axis.

公开(公告)号：US20240272375A1

公开(公告)日：2024-08-15

申请号：US18570431

申请日：2021-06-21

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yoshiteru ABE ,  Yoko YAMASHITA ,  Taiji SAKAMOTO ,  Takashi MATSUI ,  Kazuhide NAKAJIMA ,  Kazunori KATAYAMA

IPC: G02B6/38

CPC classification number: G02B6/3882

Abstract: An object of the present disclosure is to connect an optical fiber and an optical waveguide with a low loss. The present disclosure is an optical connector plug, including: an optical waveguide having two guide pin V-grooves engraved on one surface thereof and having a cross section of one or more cores appearing between cross sections of the guide pin V-grooves on one end face thereof; two guide pins separately arranged in the two guide pin V-grooves; a flat substrate so fixed as to tuck the two guide pins in the two guide pin V-grooves on the one surface of the optical waveguide; and a fixing member equipped with the optical waveguide, the two guide pins, and the flat substrate.

公开(公告)号：US20240241324A1

公开(公告)日：2024-07-18

申请号：US18562732

申请日：2021-06-10

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Chisato FUKAI ,  Yoshiteru ABE

IPC: G02B6/38 ,  G02B6/40

CPC classification number: G02B6/3834 ,  G02B6/3863 ,  G02B6/3878 ,  G02B6/403

Abstract: An object of the present disclosure is to enable a plurality of single fibers to be easily and collectively connected.
The present disclosure is a cylindrical multi-fiber ferrule including through holes each having a cylindrical shape and configured to hold a plurality of optical fibers on the same circle centered on a central axis of the cylindrical shape, in which a region where the through holes are arranged at one end of the cylindrical shape in a longitudinal direction has a spherical shape, and a central region where the through holes are not arranged at one end of the cylindrical shape in the longitudinal direction is a flat surface shape perpendicular to the longitudinal direction of the cylindrical shape.

公开(公告)号：US20240230464A1

公开(公告)日：2024-07-11

申请号：US18288988

申请日：2021-05-28

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Ryo KOYAMA ,  Yoshiteru ABE ,  Kazunori KATAYAMA

IPC: G01M11/00 ,  G01M11/02

CPC classification number: G01M11/37 ,  G01M11/0207

Abstract: The present disclosure aims to reduce the size and cost of this optical monitoring device that detects the intensity of light propagating through an optical fiber.
The present disclosure relates to an optical monitoring device for detecting the intensity of light propagating through an optical fiber, the optical monitoring device comprising an optical component that branches part of incident light in a first direction and branches the rest in a second direction at a specific branching ratio and emits the light, wherein the optical component includes: a single-layer film having a uniform thickness; an incident-side member provided on the incident side of the single-layer film; and an outgoing-side member provided on the outgoing side of the single-layer film, a first refractive index interface between the single-layer film and the incident-side member and a second refractive index interface between the single-layer film and the outgoing-side member are provided at a specific angle with an optical axis of the incident light, the first direction is a direction in which the light transmits through the first refractive index interface and the second refractive index interface, and the second direction is a direction in which the light is reflected on the first refractive index interface and the second refractive index interface.

公开(公告)号：US20240230461A1

公开(公告)日：2024-07-11

申请号：US18288989

申请日：2021-05-28

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Ryo KOYAMA ,  Yoshiteru ABE ,  Kazunori KATAYAMA

IPC: G01M11/02

CPC classification number: G01M11/0207

Abstract: An object of the present disclosure is to realize a compact and low-cost optical monitoring device capable of accurately measuring the power of an optical signal regardless of the polarization state of an incident optical signal for a multi-core optical fiber.
An optical monitoring device according to the present disclosure includes: a first branching portion that branches incident light incident from a determined incident area into two in a first direction and a second direction; a first light receiving element that receives branched light branched in the second direction by the first branching portion and detects an intensity of the light branched by the first branching portion for each incident position in the incident area; a second branching portion that branches branched light branched in the first direction by the first branching portion into two in a third direction perpendicular to both the first direction and the second direction and the first direction; and a second light receiving element that receives branched light branched in the third direction by the second branching portion and detects an intensity of the light branched by the second branching portion for each incident position in the incident area.

公开(公告)号：US20240201448A1

公开(公告)日：2024-06-20

申请号：US18287144

申请日：2021-05-17

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yoshiteru ABE ,  Ryo KOYAMA ,  Chisato FUKAI ,  Kazunori KATAYAMA

IPC: G02B6/38

CPC classification number: G02B6/382 ,  G02B6/3885

Abstract: The present disclosure has been proposed in view of the above circumstances, and an object is to provide a multi-core optical connector that does not need to increase a spring pressing force even when the number of cores to be connected increases.
The present disclosure is an optical connector including: a ferrule that holds a plurality of optical fibers in a state where end faces of the plurality of optical fibers are arranged on the same plane; and a refractive index matching portion that is deformable, in close contact with the end faces of the plurality of optical fibers arranged on the ferrule, and performs matching of a refractive index with the plurality of optical fibers.