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公开(公告)号：US20240142697A1
公开(公告)日：2024-05-02
申请号：US18410605
申请日：2024-01-11
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Kohei KAWASAKI , Ryuichi SUGIZAKI , Masayoshi TSUKAMOTO , Masanori TAKAHASHI , Shigehiro TAKASAKA , Koichi MAEDA
IPC: G02B6/04 , C03C25/106 , C03C25/26 , G02B6/40
CPC classification number: G02B6/04 , C03C25/106 , C03C25/26 , G02B6/403
Abstract: An optical fiber bundle structure includes: plural optical fiber core wires; a crossing preventing member; and a grasping member. Further, the crossing preventing member has slits and the widths of the slits positioned at the respective sides are each equal to or larger than a difference between: a length of one side of a polygon circumscribing the plural optical fiber core wires at a hindmost end portion of the slits at the trailing end; and a length of one side of a polygon circumscribing the plural optical fiber core wires at the leading end.
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公开(公告)号：US20230123319A1
公开(公告)日：2023-04-20
申请号：US18068039
申请日：2022-12-19
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Shigehiro TAKASAKA , Koichi MAEDA , Keiichi AISO , Shinichi ARAI , Kazunori MUKASA , Yukihiro TSUCHIDA , Masanori TAKAHASHI , Ryuichi SUGIZAKI
Abstract: An optical amplifying fiber includes: at least one core portion including a rare earth element added therein; an inner cladding portion surrounding the at least one core portion, the inner cladding portion having a refractive index lower than a maximum refractive index of the at least one core portion; and an outer cladding portion surrounding the inner cladding portion, the outer cladding portion having a refractive index lower than the refractive index of the inner cladding portion, the inner cladding portion including different refractive index regions each having a refractive index different from a refractive index of a region adjacent to that different refractive index region.
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3.发明申请CONNECTION STRUCTURE FOR MULTI-CORE FIBER AND OPTICAL-FIBER-BUNDLE STRUCTURE, CONNECTION STRUCTURE FOR MULTI-CORE FIBERS, METHOD FOR EXCITING RARE-EARTH-DOPED MULTI-CORE FIBERS, AND MULTI-CORE-OPTICAL-FIBER AMPLIFIER 审中-公开用于多芯光纤和光纤布结构的连接结构，多芯光纤的连接结构，稀土多芯多芯光纤的方法和多芯光纤放大器公开(公告)号：US20160020573A1
公开(公告)日：2016-01-21
申请号：US14834448
申请日：2015-08-25
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Kengo WATANABE , Tsunetoshi SAITO , Yukihiro TSUCHIDA , Koichi MAEDA , Katsunori IMAMURA
CPC classification number: H01S3/094042 , G02B6/02042 , G02B6/2552 , G02B6/2856 , G02B6/40 , H01S3/06737 , H01S3/06745 , H01S3/06783 , H01S3/094003 , H01S3/1608
Abstract: An optical-fiber-bundle structure is connected to one end of a multi-core fiber. The multi-core fiber has a tapered section formed therein. The outside diameter of the multi-core fiber and the core pitch thereof decrease in the tapered section. It is possible for the multi-core fiber to have an increasing core pitch on the connection-side thereof which connects to the optical-fiber-bundle structure; hence, it is possible to use an easy-to-use large-diameter optical fiber as the optical fiber to be provided in the optical-fiber-bundle structure. When connecting another multi-core fiber to the other end of the multi-core fiber, it is possible to match the outer diameters thereof; hence, when fusion splicing to one another, it is unlikely for a positional shift of the cores to occur.
Abstract translation: 光纤束结构连接到多芯光纤的一端。 多芯纤维在其中形成有锥形部。 多芯纤维的外径和芯间距在锥形部分中减小。 多芯光纤在与光纤束结构连接的连接侧上具有增加的芯间距， 因此，可以使用易于使用的大直径光纤作为光纤束结构中设置的光纤。 当将多芯纤维连接到多芯光纤的另一端时，可以匹配其多芯纤维的外径; 因此，当熔接彼此时，不可能使芯发生位置偏移。
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公开(公告)号：US20240151898A1
公开(公告)日：2024-05-09
申请号：US18410522
申请日：2024-01-11
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Kohei KAWASAKI , Ryuichi SUGIZAKI , Masayoshi TSUKAMOTO , Masanori TAKAHASHI , Shigehiro TAKASAKA , Koichi MAEDA
IPC: G02B6/04 , C03C25/106 , C03C25/26 , G02B6/40
CPC classification number: G02B6/04 , C03C25/106 , C03C25/26 , G02B6/403
Abstract: An optical fiber bundle structure includes: plural optical fiber core wires; a crossing preventing member; and a grasping member. Further, the crossing preventing member has slits and the widths of the slits positioned at the respective sides are each equal to or larger than a difference between: a length of one side of a polygon circumscribing the plural optical fiber core wires at a hindmost end portion of the slits at the trailing end; and a length of one side of a polygon circumscribing the plural optical fiber core wires at the leading end.
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公开(公告)号：US20230038133A1
公开(公告)日：2023-02-09
申请号：US17955982
申请日：2022-09-29
Applicant: FURUKAWA ELECTRIC CO., LTD. , KDDI CORPORATION
Inventor： Shigehiro TAKASAKA , Koichi MAEDA , Ryuichi SUGIZAKI , Takehiro TSURITANI , Hidenori TAKAHASHI , Itsuro MORITA
Abstract: An optical fiber amplification. system includes: a first optical fiber amplifier including a first optical amplifying fiber including a core portion doped with a first rare-earth. element, a first input unit configured to receive first signal light, an excitation-light source configured to output pump light, a pump light combiner configured to input the pump light to the first optical amplifying fiber, and a residual pump light recovery device configured to recover residual pump light; and a second optical fiber amplifier including a second optical amplifying fiber including a core portion doped with a second rare-earth. element, a second input unit configured to receive second signal light, and a residual pump light combiner configured to input, to the second optical amplifying fiber, the residual pump light recovered by the residual pump light recovery device.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20220003921A1
公开(公告)日：2022-01-06
申请号：US17448077
申请日：2021-09-20
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Masanori TAKAHASHI , Koichi MAEDA , Shinichi ARAI , Ryuichi SUGIZAKI , Masayoshi TSUKAMOTO
IPC: G02B6/02
Abstract: A multicore fiber includes: n pieces of first core regions in a circular shape with a radius r1 that are arranged about points P11 to P1n, and that has a first core portion and a first cladding portion; a second core region in a circular shape with a radius R1 that is arranged about the point a1, and that has a second core portion and a second cladding portion; and a cladding region that is formed on an outer circumferences of the first core region and the second core region. Further, abutting surfaces that are flat surfaces abutting on each other are formed in portions on the outer circumferences of the first core region and the second core region.
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公开(公告)号：US20230003934A1
公开(公告)日：2023-01-05
申请号：US17931732
申请日：2022-09-13
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Shigehiro TAKASAKA , Koichi MAEDA , Ryuichi SUGIZAKI
Abstract: A multi-core optical amplifying fiber includes: core portions doped with a rare-earth element; an inner cladding portion; and an outer cladding portion. A mode field diameter of each core portion at a wavelength at which the rare-earth element performs optical amplification is 5 μm to 11 μm, a relative refractive-index difference of the maximum refractive index of each core portion with respect to the inner cladding portion is 0.35% to 2%, a core-to-core distance is set such that total inter-core crosstalk is −40 dB/100 m or lower in an optical amplification wavelength band subjected to the optical amplification, a cladding thickness is smaller than a value obtained by adding the mode field diameter to a minimum value of the core-to-core distance, and a ratio of a total sectional area of the core portions to a sectional area of the inner cladding portion is 1.9% or more.
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公开(公告)号：US20220003924A1
公开(公告)日：2022-01-06
申请号：US17479343
申请日：2021-09-20
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Kohei KAWASAKI , Ryuichi SUGIZAKI , Masayoshi TSUKAMOTO , Masanori TAKAHASHI , Shigehiro TAKASAKA , Koichi MAEDA
IPC: G02B6/04 , G02B6/40 , C03C25/106 , C03C25/26
Abstract: An optical fiber bundle structure includes: plural optical fiber core wires; a crossing preventing member; and a grasping member. Further, the crossing preventing member has slits and the widths of the slits positioned at the respective sides are each equal to or larger than a difference between: a length of one side of a polygon circumscribing the plural optical fiber core wires at a hindmost end portion of the slits at the trailing end; and a length of one side of a polygon circumscribing the plural optical fiber core wires at the leading end.
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公开(公告)号：US20200301066A1
公开(公告)日：2020-09-24
申请号：US16893589
申请日：2020-06-05
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Shigehiro TAKASAKA , Koichi MAEDA
Abstract: An aim is to provide an optical coupler that contributes increasing pump-efficiency in an optical amplifier, and the optical amplifier. The optical amplifier includes: a main optical fiber that includes a core transmitting signal light, an inner cladding portion formed around an outer periphery of the core and having a refractive index lower than a refractive index of the core, and an outer cladding portion formed around an outer periphery of the inner cladding portion and having a refractive index lower than the refractive index of the inner cladding portion, a part of the outer cladding portion of which in a longitudinal direction being removed; and at least one pump-light input-output optical fiber that is fusion-spliced to the inner cladding portion of the main optical fiber at the portion where the outer cladding portion is removed, an average refractive index of which in a contact region where the pump-light input-output optical fiber is in contact with the inner cladding portion being larger than the refractive index of the inner cladding portion. Pump-light propagating in the pump-light input-output optical fiber is coupled to the inner cladding portion from the contact region and propagates in the inner cladding portion, or the pump-light propagating in the inner cladding portion is coupled to the pump-light input-output optical fiber from the contact region and propagates in the pump-light input-output optical fiber.
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10.发明申请MULTI-CORE OPTICAL AMPLIFYING FIBER DEVICE AND MULTI-CORE OPTICAL FIBER AMPLIFIER 有权多芯光学放大光纤装置和多芯光纤放大器公开(公告)号：US20160118762A1
公开(公告)日：2016-04-28
申请号：US14976922
申请日：2015-12-21
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Masateru TADAKUMA , Koichi MAEDA , Yukihiro TSUCHIDA , Shigehiro TAKASAKA , Ryuichi SUGIZAKI
CPC classification number: H01S3/06737 , G02B6/02042 , H01S3/06758 , H01S3/06766 , H01S3/06783 , H01S3/094003 , H01S3/094007 , H01S3/094019 , H01S3/094038 , H01S3/094061 , H01S3/10023 , H01S3/1608 , H01S2301/04
Abstract: A multi-core optical amplifying fiber device includes a plurality of multi-core optical amplifying fibers including a plurality of core portions doped with amplification medium and a cladding portion formed at outer peripheries of the plurality of core portions; and a connection portion connecting the core portions of the plurality of multi-core optical amplifying fibers to one another. The connection portion connects the core portions to restrain deviation, between every connected core portions, of amplification gain for a total length of the core portions connected one another.
Abstract translation: 多芯光放大光纤装置包括多个多芯光放大光纤，包括多个掺杂有放大介质的芯部和形成在多个芯部的外周的包层部分; 以及将多个多芯光放大光纤的芯部彼此连接的连接部。 连接部分连接核心部分以限制每个连接的芯部分之间的彼此连接的芯部分的总长度的放大增益之间的偏差。
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