公开(公告)号：US20230408759A1

公开(公告)日：2023-12-21

申请号：US18461054

申请日：2023-09-05

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Masanori TAKAHASHI ,  Koichi MAEDA ,  Ryuichi SUGIZAKI

IPC: G02B6/02

CPC classification number: G02B6/02042 ,  G02B6/02061

Abstract: A multicore fiber includes: a plurality of core portions made of glass; and a cladding portion made of glass and configured to surround outer periphery of the plurality of core portions. The cladding portion has tensile stress of 20 MPa or lower in a region on outer periphery side than a core portion that is closest to outer periphery of the cladding portion in the plurality of core portions.

公开(公告)号：US20230314700A1

公开(公告)日：2023-10-05

申请号：US18332177

申请日：2023-06-09

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kengo WATANABE ,  Masanori TAKAHASHI ,  Ryuichi SUGIZAKI ,  Koichi MAEDA ,  Shigehiro TAKASAKA

IPC: G02B6/04 ,  C03B37/028

CPC classification number: G02B6/04 ,  C03B37/028

Abstract: An optical fiber bundle structure includes: a plurality of optical fiber core wires; and a capillary, wherein each of the optical fiber core wires includes a glass fiber portion including a core and a clad, and a resin coated portion, the glass fiber portions are inserted in the capillary, and d2/d1 is equal to or larger than 0.57 and smaller than 1, where d1 is a diameter of the core of each of the glass fiber portions in a rear end portion of the capillary and d2 is a diameter of the core of each of the glass fiber portions in a distal end portion of the capillary.

公开(公告)号：US20230204853A1

公开(公告)日：2023-06-29

申请号：US18178620

申请日：2023-03-06

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Masanori TAKAHASHI ,  Koichi MAEDA ,  Ryuichi SUGIZAKI ,  Yoshihiro ARASHITANI

IPC: G02B6/02

CPC classification number: G02B6/02042

Abstract: A multicore fiber includes: a plurality of first glass regions each including: a core portion; and a first cladding portion having a lower refractive index than a maximum refractive index of the core portion; and a cladding region formed on outer peripheries of the plurality of first glass regions, wherein compressive stress is applied to the plurality of first glass regions.

公开(公告)号：US20230006410A1

公开(公告)日：2023-01-05

申请号：US17931264

申请日：2022-09-12

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Shigehiro TAKASAKA ,  Koichi MAEDA ,  Keiichi AISO ,  Shinichi ARAI ,  Ryuichi SUGIZAKI ,  Kazunori MUKASA ,  Yukihiro TSUCHIDA ,  Masanori TAKAHASHI

IPC: H01S3/067 ,  H01S3/16 ,  H01S3/091

Abstract: An optical amplifying fiber includes: at least one single core portion doped with a rare-earth element; an inner cladding portion configured to enclose the at least one core portion, the inner cladding portion having a lower refractive index than maximum refractive index of each core portion; and an outer cladding portion configured to enclose the inner cladding portion, the outer cladding portion having a lower refractive index than refractive index of the inner cladding portion, wherein the inner cladding portion includes a plurality of air bubbles.

公开(公告)号：US20160028206A1

公开(公告)日：2016-01-28

申请号：US14835641

申请日：2015-08-25

Applicant: FURUKAWA ELECTRIC CO., LTD.

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

IPC: H01S3/094 ,  G02B6/02 ,  H01S3/067 ,  G02B6/40

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

Abstract: A bundle structure is obtained by arranging optical fibers having equal diameters in a close-packed arrangement around the outer circumference of a center optical fiber. The optical fibers are signal light optical fibers that transmit signal lights. The optical fiber is a pump light optical fiber that transmits pump light. The number of optical fibers is equal to the number of cores in the multi-core fiber. The bundle structure and the multi-core fiber are connected to one another by adhering or fusing. The cores and the cores are optically connected, and the core and the cladding are optically connected. When connecting, the mode field diameter of the cores and the cores are substantially equivalent. In addition, the outer diameter (diameter of circumscribed circle including optical fibers) of the bundle structure is set so as not to be greater than the outer diameter of the multi-core fiber.

Abstract translation: 通过以紧密堆积的方式布置具有相等直径的光纤围绕中心光纤的外圆周来获得束结构。 光纤是传输信号灯的信号光纤。 光纤是透射泵浦光的泵浦光纤。 光纤的数量等于多芯光纤中的芯数。 束结构和多芯光纤通过粘接或熔合而相互连接。 芯和芯被光学连接，并且芯和包层被光学连接。 当连接时，芯和芯的模场直径基本相等。 此外，束结构的外径（包括光纤的外接圆的直径）设定为不大于多芯纤维的外径。