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公开(公告)号：US09891378B2
公开(公告)日：2018-02-13
申请号：US15440228
申请日：2017-02-23
发明人： Katsunori Imamura , Tomohiro Gonda , Ryuichi Sugizaki , Taiji Sakamoto , Takayoshi Mori , Masaki Wada , Takashi Yamamoto , Fumihiko Yamamoto
IPC分类号： G02B6/02 , G02B6/028 , C03B37/16 , C03B37/012
CPC分类号： G02B6/02042 , C03B37/01205 , C03B37/01222 , C03B37/027 , C03B37/16 , C03B2203/10 , C03B2203/18 , C03B2203/22 , C03B2203/23 , C03B2203/26 , C03B2203/34 , C03B2205/30 , G02B6/0288 , G02B6/0365
摘要： A multicore fiber includes a plurality of unit multicore fibers each including: a plurality of core portions; and a clad portion which is formed in an outer circumference of the core portions and has a refractive index lower than a maximum refractive index of the core portions. The plurality of the core portions have substantially same refractive index profile and different group delays at same wavelength in same propagation mode. The core portions of the multicore fiber are configured so that the core portions of the plurality of the unit multicore fibers are connected in cascade, a maximum value of differential group delays between the core portions of the multicore fiber is smaller than a reduced value of a maximum value of differential group delays between the core portions of each unit multicore fiber as a value in terms of a length of the multicore fiber.
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公开(公告)号：US09075185B2
公开(公告)日：2015-07-07
申请号：US13754963
申请日：2013-01-31
发明人： Naomi Kumano , Iwao Shimotakahara , Ryuichi Sugizaki , Takeshi Yagi , Tomoya Shimizu , Takashi Matsui , Yukihiro Goto , Toshio Kurashima , Kazuhide Nakajima
CPC分类号： G02B6/032 , G02B6/02333 , G02B6/02366 , G02B6/03627
摘要： A hole-assisted optical fiber includes a core portion and a cladding portion that includes an inner cladding layer, an outer cladding layer, and holes formed around the core portion. A diameter of the core portion is 3 μm to 9.8 μm, a relative refractive index difference of the core portion relative to the outer cladding layer is 0.11% to 0.45%, an outside diameter of the inner cladding layer is 53 μm or less, a relative refractive index difference of the inner cladding layer relative to the outer cladding layer is a negative value, −0.30% or more, a diameter of each hole is 2.4 μm to 4.0 μm, a hole occupancy rate is 17% to 48%, a bending loss at a wavelength of 1625 nm when bent at a radius of 5 mm is 1 dB/turn or less, and a cut-off wavelength is 1550 nm or less.
摘要翻译： 空穴辅助光纤包括芯部和包括内包层，外包层和形成在芯部周围的孔的包层部分。 芯部的直径为3μm〜9.8μm，芯部相对于外包层的相对折射率差为0.11〜0.45％，内包层的外径为53μm以下， 内包层相对于外包层的相对折射率差为负值-0.30％以上，各孔的直径为2.4μm〜4.0μm，孔占有率为17〜48％，a 以5mm的半径弯曲时，波长1625nm处的弯曲损耗为1dB /匝以下，截止波长为1550nm以下。
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公开(公告)号：US20130136409A1
公开(公告)日：2013-05-30
申请号：US13754963
申请日：2013-01-31
发明人： Naomi Kumano , Iwao Shimotakahara , Ryuichi Sugizaki , Takeshi Yagi , Tomoya Shimizu , Takashi Matsui , Yukihiro Goto , Toshio Kurashima , Kazuhide Nakajima
IPC分类号： G02B6/032
CPC分类号： G02B6/032 , G02B6/02333 , G02B6/02366 , G02B6/03627
摘要： A hole-assisted optical fiber includes a core portion and a cladding portion that includes an inner cladding layer, an outer cladding layer, and holes formed around the core portion. A diameter of the core portion is 3 μm to 9.8 μm, a relative refractive index difference of the core portion relative to the outer cladding layer is 0.11% to 0.45%, an outside diameter of the inner cladding layer is 53 μm or less, a relative refractive index difference of the inner cladding layer relative to the outer cladding layer is a negative value, −0.30% or more, a diameter of each hole is 2.4 μm to 4.0 μm, a hole occupancy rate is 17% to 48%, a bending loss at a wavelength of 1625 nm when bent at a radius of 5 mm is 1 dB/turn or less, and a cut-off wavelength is 1550 nm or less.
摘要翻译： 空穴辅助光纤包括芯部和包括内包层，外包层和形成在芯部周围的孔的包层部分。 芯部的直径为3μm〜9.8μm，芯部相对于外包层的相对折射率差为0.11〜0.45％，内包层的外径为53μm以下，a 内包层相对于外包层的相对折射率差为-0.30％以上的负值，每个孔的直径为2.4μm〜4.0μm，孔占有率为17〜48％，a 以5mm的半径弯曲时，波长1625nm处的弯曲损耗为1dB /匝以下，截止波长为1550nm以下。
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公开(公告)号：US09722388B2
公开(公告)日：2017-08-01
申请号：US14976922
申请日：2015-12-21
CPC分类号： 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
摘要： 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.
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5.发明申请公开(公告)号：US20140240819A1
公开(公告)日：2014-08-28
申请号：US14245672
申请日：2014-04-04
发明人： Yukihiro TSUCHIDA , Koichi Maeda , Yu Mimura , Hiroshi Matsuura , Kengo Watanabe , Tsunetoshi Saito , Ryo Miyabe , Shigeto Matsumoto , Keiichi Aiso , Ryuichi Sugizaki
CPC分类号： H01S3/06708 , G02B6/02042 , H01S3/0064 , H01S3/06737 , H01S3/06754 , H01S3/094061 , H01S3/09415 , H01S3/1608 , H01S3/2383 , H01S2301/02 , H01S2301/04 , H04J14/02 , H04J14/04
摘要： A multi-core amplification optical fiber includes a plurality of rare-earth-doped core portions and a cladding portion positioned at an outer periphery of the core portions and having refractive index lower than those of the core portions. When a doping concentration of the rare-earth of each of the core portions is 250 ppm to 2000 ppm, a relative refractive index difference of each of the core portions relative to the cladding portion is 0.5% to 2% at a wavelength of 1550 nm, and a core diameter of each of the core portions is 1 μm to 5 μm, a separation distance between each of the core portions and adjacent one of the core portions is set at equal to or larger than 30 μm and at equal to or smaller than 60 μm so that a light-crosstalk between the adjacent core portions is equal to or lower than −30 dB.
摘要翻译： 多芯放大光纤包括多个稀土掺杂芯部和位于芯部的外周的折射率低于芯部的折射率的包层部。 每个芯部的稀土的掺杂浓度为250ppm〜2000ppm时，芯部相对于包层部的相对折射率差在1550nm的波长为0.5〜2％ ，芯部的芯部直径为1μm〜5μm，芯部与相邻的一个芯部之间的间隔距离设定为30μm以上，等于或小于 使得相邻芯部之间的光串扰等于或低于-30dB。
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6.发明授权公开(公告)号：US12001050B2
公开(公告)日：2024-06-04
申请号：US17448077
申请日：2021-09-20
IPC分类号： G02B6/02
CPC分类号： G02B6/02042
摘要： 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：US11940649B2
公开(公告)日：2024-03-26
申请号：US17479343
申请日：2021-09-20
发明人： Kohei Kawasaki , Ryuichi Sugizaki , Masayoshi Tsukamoto , Masanori Takahashi , Shigehiro Takasaka , Koichi Maeda
IPC分类号： G02B6/40 , C03C25/106 , C03C25/26 , G02B6/04
CPC分类号： G02B6/04 , C03C25/106 , C03C25/26 , G02B6/403
摘要： 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：US11519759B2
公开(公告)日：2022-12-06
申请号：US17136446
申请日：2020-12-29
摘要： A cable comprising: a plurality of optical fiber cores; and one or more optical fiber core wires including one or more of the optical fiber cores. Further, at least one of the optical fiber core wire is fixed at a plurality of positions in a longitudinal direction of the cable so as to achieve substantially no displacement in a cable radial direction, at least a pair of the optical fiber core wires are fixed in a plane perpendicular to the longitudinal direction of the cable so as to achieve substantially no displacement relative to each other, and sensing of a strain profile in the longitudinal direction of at least the pair of the optical fiber core wires leads to achievement of sensing of a shape of the cable in the longitudinal direction.
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公开(公告)号：US11378735B1
公开(公告)日：2022-07-05
申请号：US17192994
申请日：2021-03-05
摘要： A multi-core fiber includes: plural cores made of silica-based glass; and a cladding enclosing the plural cores and made of silica-based glass, the cladding having a refractive index lower than a maximum refractive index of the plural cores. Further, the multi-core fiber has a mode field diameter of 5.0 μm or larger at a wavelength of 1100 nm, the multi-core fiber provides single-mode propagation at the wavelength of 1100 nm, the multi-core fiber has a bending loss of 1 dB/turn or less at the wavelength of 1100 nm when the multi-core fiber is bent at a radius of 2 mm, and the multi-core fiber has a crosstalk between cores of −30 dB/km or less.
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公开(公告)号：US09695079B2
公开(公告)日：2017-07-04
申请号：US14920534
申请日：2015-10-22
IPC分类号： C03B37/012 , C03B37/018 , G02B6/02 , C03B37/014 , C03B37/027
CPC分类号： C03B37/01222 , C03B37/01205 , C03B37/01234 , C03B37/01486 , C03B37/01493 , C03B37/018 , C03B37/027 , C03B2203/23 , C03B2203/34 , C03B2207/50 , G02B6/02042
摘要： A production method of an optical fiber preform includes first preparing a first preform having a plurality of glass preforms and a first cladding portion disposed between the plurality of glass preforms, and first arranging a second cladding portion to surround the first preform. At the first arranging, a material gas and a combustion gas are ejected from a burner to produce glass particles. The first preform and the burner are moved relative to each other in a longitudinal direction of the first preform. The glass particles are deposited on the first preform.
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