公开(公告)号：US20230318703A1

公开(公告)日：2023-10-05

申请号：US17928256

申请日：2020-06-02

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Ryo KOYAMA ,  Masaaki TAKAYA ,  Yoshiteru ABE

IPC: H04B10/077

CPC classification number: H04B10/0775 ,  H04B2210/077

Abstract: For an optical monitor device that detects the intensity of light propagating through an optical fiber, a reduction in size and cost of the optical monitor device are to be achieved.
The present disclosure provides an optical monitor device including: an optical component that branches an incoming light at a specific branching ratio and outputs the majority thereof in a specific direction and the rest thereof in another specific direction; a plurality of incoming-side optical fibers through which light is to propagate and that are two-dimensionally arranged to cause the light to enter the optical component; a plurality of outgoing-side optical fibers through which light is to propagate and that are arranged to receive the most outgoing light from the optical component; a light-receiving element located to receive a partial outgoing light from the optical component; an incoming-side lens located between the optical component and the incoming-side optical fibers and that causes the incoming light into the optical component to be a parallel light; and an outgoing-side lens located between the optical component and the outgoing-side optical fibers and that efficiently couples the outgoing light from the optical component to the outgoing-side optical fibers.

公开(公告)号：US20210341684A1

公开(公告)日：2021-11-04

申请号：US17282981

申请日：2019-09-25

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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

IPC: G02B6/38 ,  B08B1/00

Abstract: An object is to provide an optical connector cleaning tool capable of cleaning both an end face and a side face of a ferrule of an optical connector plug simultaneously and simply and a method of cleaning an optical connector in such a manner. An optical connector cleaning tool according to the present invention includes superimposing a plurality of cleaning sheets on each other, the cleaning sheets each including a plurality of cleaning strings arranged so as to be parallel to each other in a sheet shape, such that orientations of the cleaning strings included in the respective cleaning sheets differ from each other, pressing an end face of a ferrule of an optical connector plug against the cleaning sheets to clean the end face of the ferrule, and subsequently, sticking the ferrule through the cleaning sheets to clean a side face of the ferrule.

公开(公告)号：US20250133315A1

公开(公告)日：2025-04-24

申请号：US18683677

申请日：2021-08-16

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Kazuhide NAKAE ,  Kazunori KATAYAMA ,  Ryo KOYAMA ,  Hiroshi WATANABE ,  Tomohiro KAWANO ,  Tatsuya FUJIMOTO

IPC: H04Q11/00

Abstract: The present disclosure is an optical line switching node device N which includes an optical switch part 2 which performs optical path switching between communication optical fibers F-0, F-1; a communication optical signal extraction part 5-0, 5-1 which extracts some of communication optical signals from one or both of the communication optical fibers F-0, F-1 and photoelectrically converts the extracted some of the communication optical signals; and a communication optical signal storage part 6 which stores some of communication optical signals photoelectrically converted in the communication optical signal extraction part 5-1, 5-1 and uses the stored energy to drive the optical switch part 2.

公开(公告)号：US20240027692A1

公开(公告)日：2024-01-25

申请号：US17424731

申请日：2020-01-10

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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

IPC: G02B6/38 ,  B08B1/00

CPC classification number: G02B6/3866 ,  B08B1/008 ,  B08B2240/02

Abstract: An object is to provide an optical connector cleaning tool capable of simultaneously and appropriately cleaning an end surface and a side surface of a ferrule of an optical connector plug. The optical connector cleaning tool according to the present invention includes an end surface cleaning section including a cleaning sheet for cleaning a ferrule end surface of an optical connector plug, a side surface cleaning section including a cleaning thread bundle (or cleaning sheet) for cleaning a ferrule side surface of the optical connector plug, and a mechanism that reveals a new cleaning sheet and a new cleaning thread bundle (or cleaning sheet) at a predetermined position after each cleaning operation.

公开(公告)号：US20220113484A1

公开(公告)日：2022-04-14

申请号：US17287308

申请日：2019-10-09

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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

IPC: G02B6/44

Abstract: To provide a connector plug that makes it possible to facilitate a plurality of persons' confirmation of a connector plug before its removal or after its insertion and to prevent erroneous work. The connector plug according to the present invention has a discoloration member mounted on a gripping portion for pinching during work. The color of the discoloration member changes due to heat of a worker's fingertips when the worker pinches the connector plug or pressure when the worker pinches the connector plug. The discoloration member is discolored by one worker pinching the connector plug. Another worker looks at the discolored discoloration member, and then is able to confirm whether the connector plug is a work target.

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.

公开(公告)号：US20230333329A1

公开(公告)日：2023-10-19

申请号：US18024549

申请日：2020-09-11

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yasunari TANAKA ,  Ryo KOYAMA

IPC: G02B6/38

CPC classification number: G02B6/3885 ,  G02B6/3883 ,  G02B6/3881 ,  G02B6/3879

Abstract: An object of the present disclosure is to reduce the size and pitch of a multi-core optical connector which connects a planar waveguide in which a multi-channel core is disposed or a plurality of optical fibers to the plurality of optical fibers.
According to the present disclosure, there is provided a multi-core optical connector which connects a plurality of cores disposed in a row and a plurality of optical fibers, in which the multi-core optical connector includes a holding unit which holds the plurality of cores and the plurality of optical fibers, the holding unit includes an elongated hole in which the plurality of optical fibers are disposed in a row, and the plurality of optical fibers and the plurality of cores are connected inside the elongated hole.

公开(公告)号：US20230280536A1

公开(公告)日：2023-09-07

申请号：US18016438

申请日：2020-07-21

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Tatsuya FUJIMOTO ,  Hidenobu HIROTA ,  Takui UEMATSU ,  Tomohiro KAWANO ,  Hiroyuki IIDA ,  Ryo KOYAMA ,  Tetsuya MANABE ,  Kazunori KATAYAMA

IPC: G02B6/28

CPC classification number: G02B6/2821

Abstract: An object of the present disclosure is to provide an optical coupling device capable of controlling a coupling index of optical coupling between two optical fibers for coupling. An optical coupling device of the present disclosure includes two optical fibers for coupling having a core and a clad, and a refractive index variable member to change the refractive index by irradiation with light between the two optical fibers for coupling.