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    MULTICORE FIBER AND METHOD FOR MANUFACTURING SAME
    3.
    发明公开
    MULTICORE FIBER AND METHOD FOR MANUFACTURING SAME 审中-实审

    公开(公告)号：EP4435481A1

    公开(公告)日：2024-09-25

    申请号：EP22895456.6

    申请日：2022-11-04

    申请人： Furukawa Electric Co., Ltd.

    发明人： MUKASA, Kazunori

    IPC分类号： G02B6/02 ,  C03B37/028 ,  G02B6/036 ,  G02B6/04

    CPC分类号： C03B37/028 ,  G02B6/04 ,  G02B6/036 ,  G02B6/02

    摘要： A multicore fiber includes multiple first linear portions that include a first core portion and a first cladding portion having a refractive index lower than a maximum refractive index of the first core portion and surrounding an outer periphery of the first core portion, and a first tubular portion. The first linear portions are respectively joined to an inner wall of the first tubular portion, and two of the first linear portions are not in contact with each other on a first virtual line connecting centers of the two of the first core portions included in two of the first linear portions on a cross-section perpendicular to the longitudinal direction, at least in a portion in a longitudinal direction.

    ARTICLE THAT DIFFUSELY REFLECTS ULTRAVIOLET LIGHT, VISIBLE LIGHT, AND/OR INFRARED LIGHT, AND PRODUCTION METHOD THEREFOR
    6.
    发明公开
    ARTICLE THAT DIFFUSELY REFLECTS ULTRAVIOLET LIGHT, VISIBLE LIGHT, AND/OR INFRARED LIGHT, AND PRODUCTION METHOD THEREFOR 审中-实审

    公开(公告)号：EP4410534A1

    公开(公告)日：2024-08-07

    申请号：EP22876455.1

    申请日：2022-09-29

    申请人： FURUKAWA ELECTRIC CO., LTD.

    发明人： MAROSFOI Botond ,  VAMOS Csenge ,  RACZ Ilona ,  NAKAI Yukako ,  MIMURA Yu

    IPC分类号： B32B5/18 ,  B32B7/023 ,  G02B5/02

    CPC分类号： B32B5/18 ,  B32B7/023 ,  G02B5/02

    摘要： Provided are an article for diffuse-reflecting ultraviolet rays, visible rays, and/or infrared rays and a method for manufacturing the article. In a manufacturing method comprising (a) a step of contacting a molded article comprising a thermoplastic polymer with a solvent and (b) a step of drying and cooling the molded article contacted with the solvent, an article wherein the article has a layer structure comprising at least one skin layer, at least one porous layer, and a bulk layer in the stated order, and the diffuse reflectance of at least any type of radiation among ultraviolet rays, visible rays, and infrared rays is more than 60% is obtained by satisfying requirements that the solvent is selected from solvents having a boiling point higher than Tc of the thermoplastic polymer, the difference between the Hildebrand solubility parameter of the solvent and the Hildebrand solubility parameter of the thermoplastic polymer is slight, and the temperature of the solvent when the solvent is contacted with the molded article is equal to or higher than Tc of the thermoplastic polymer - 50°C, preferably equal to or higher than Tc - 10°C, and equal to or lower than the boiling point of the solvent.

    OPTICAL FIBER
    10.
    发明公开
    OPTICAL FIBER 审中-实审

    公开(公告)号：EP4357310A1

    公开(公告)日：2024-04-24

    申请号：EP22824927.2

    申请日：2022-06-10

    申请人： FURUKAWA ELECTRIC CO., LTD.

    发明人： MUKASA, Kazunori ,  AISO, Keiichi

    IPC分类号： C03C13/04 ,  G02B6/02 ,  G02B6/036

    CPC分类号： G02B6/036 ,  C03C13/04 ,  G02B6/02

    摘要： An optical fiber includes a core portion made of silica-based glass; and a cladding portion made of silica-based glass having lower maximum refractive index than the core portion, the cladding portion surrounding an outer periphery of the core portion. The core portion is doped with an alkali metal element and chlorine. An average concentration of chlorine is higher than 800 atomic ppm on a cross-section perpendicular to a longitudinal direction of the core portion. A region doped with the alkali metal element is larger than a region doped with chlorine at 800 atomic ppm or higher.