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公开(公告)号：US11714229B2
公开(公告)日：2023-08-01
申请号：US17393993
申请日：2021-08-04
发明人： Kazunori Mukasa
IPC分类号： C03B37/014 , C03B37/018 , C03B37/027 , G02B6/02 , G02B6/036
CPC分类号： G02B6/0365 , C03B37/014 , C03B37/018 , C03B37/027 , G02B6/02214 , C03B2201/12 , C03B2201/31 , C03B2203/22
摘要： An optical fiber includes: a central core portion; an intermediate layer; a trench layer; and a cladding portion. Further, Δ1>Δ2>Δ3 and 0>Δ3 are satisfied, where Δ1 is a relative refractive-index difference of the central core portion, Δ2 is a relative refractive-index difference of the intermediate layer, and Δ3 is a relative refractive-index difference of the trench layer with respect to the cladding portion, respectively, and (c−b) is smaller than 4.5 μm when Δ1 is equal to or larger than 0.36% and equal to or smaller than 0.40%, Δ2 is equal to or larger than −0.05% and equal to or smaller than 0.05%, |Δ3| is equal to or smaller than 0.25%, Δ1×|Δ3| is equal to or smaller than 0.08%2, an inner diameter of the trench layer is 2b, and an outer diameter of the trench layer is 2c.
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公开(公告)号：US11624871B2
公开(公告)日：2023-04-11
申请号：US17232221
申请日：2021-04-16
发明人： Kazunori Mukasa
摘要： An object is to obtain an optical fiber having a small diameter and suppressing the increase of a microbending loss of the optical fiber. The optical fiber includes: a core portion made of silica glass; a cladding portion made of silica glass, the cladding portion covering the outer periphery of the core portion and having a refractive index smaller than a maximum refractive index of the core portion; and a coating portion covering the outer periphery of the cladding portion. The outer diameter of the cladding portion is 100 μm or smaller, the relative refractive-index difference Δ1 of the core portion is 0.5% or smaller, and the thickness of the coating portion is 10 μm or larger.
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公开(公告)号：US11474292B2
公开(公告)日：2022-10-18
申请号：US16986743
申请日：2020-08-06
发明人： Kazunori Mukasa
IPC分类号： G02B6/02 , H04B10/25 , C03B37/012 , C03B37/027 , G02B6/42 , H04B10/50 , H04B10/60 , H04J14/02
摘要： A multi-core fiber includes: a plurality of cores; and a cladding portion formed around outer peripheries of the cores. Further, the cores each have a propagation characteristic conforming to any one of a plurality of standards for optical propagation characteristics, and of the cores, cores that are closest to each other conform to standards different from each other.
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公开(公告)号：US20210373228A1
公开(公告)日：2021-12-02
申请号：US17445115
申请日：2021-08-16
发明人： Kazunori Mukasa
摘要： An optical fiber includes: a central core portion; an intermediate layer; a trench layer; and a cladding portion. Further, relationships Δ1>Δ2>Δ3 and 0>Δ3 are satisfied, where Δ1, Δ2, and Δ3 are a relative refractive-index difference of the central core portion, the intermediate layer, and the trench layer, respectively, with respect to the cladding portion, Δ1 is equal to or larger than 0.34% and equal to or smaller than 0.37%, |Δ3| is equal to or larger than 0.1% and equal to or smaller than 0.25%, Δ1×|Δ3| is equal to or smaller than 0.08%2, a mode field diameter at a wavelength of 1310 nm is equal to or larger than 8.8 μm, and a transmission loss at a wavelength of 1550 nm is equal to or smaller than 0.195 dB/km.
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公开(公告)号：US11714228B2
公开(公告)日：2023-08-01
申请号：US17445115
申请日：2021-08-16
发明人： Kazunori Mukasa
IPC分类号： C03B37/014 , G02B6/02 , G02B6/028 , G02B6/036
CPC分类号： G02B6/028 , G02B6/02238 , G02B6/02395 , G02B6/036 , C03B37/014 , C03B2201/31 , C03B2203/22 , C03B2203/23 , G02B6/0365
摘要： An optical fiber includes: a central core portion; an intermediate layer; a trench layer; and a cladding portion. Further, relationships Δ1>Δ2>Δ3 and 0>Δ3 are satisfied, where Δ1, Δ2, and Δ3 are a relative refractive-index difference of the central core portion, the intermediate layer, and the trench layer, respectively, with respect to the cladding portion, Δ1 is equal to or larger than 0.34% and equal to or smaller than 0.37%, |Δ3| is equal to or larger than 0.1% and equal to or smaller than 0.25%, Δ1×|Δ3| is equal to or smaller than 0.08%2, a mode field diameter at a wavelength of 1310 nm is equal to or larger than 8.8 μm, and a transmission loss at a wavelength of 1550 nm is equal to or smaller than 0.195 dB/km.
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公开(公告)号：US11555957B2
公开(公告)日：2023-01-17
申请号：US16931527
申请日：2020-07-17
发明人： Kazunori Mukasa
IPC分类号： G02B6/02 , C03B37/012
摘要： A method of manufacturing a multicore fiber includes: an initial-preform forming process of forming an initial preform by arranging in an array a plurality of core rods each including a core portion and a cladding portion formed around outer periphery of the core portion; and an optical fiber manufacturing process of manufacturing an optical fiber from the initial preform. Further, the core rods include a plurality of holes, and the core rods are arranged in a manner that one hole is arranged between two core portion adjacent to each other in the initial-preform forming process.
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7.发明授权公开(公告)号：US08861915B2
公开(公告)日：2014-10-14
申请号：US13889936
申请日：2013-05-08
发明人： Kazunori Mukasa
CPC分类号： G02B6/02 , G02B6/02004 , G02B6/02009 , G02B6/02014 , G02B6/02019 , G02B6/02023 , G02B6/03627
摘要： An optical fiber includes a core portion and a cladding portion that is formed around an outer periphery of the core portion and has a refractive index lower than a maximum refractive index of the core portion. As characteristics at a wavelength of 1550 nm, an effective core area in a fundamental propagation mode is 120 μm2 or larger, an effective core area in a first higher-order propagation mode is 150 μm2 or larger, an effective core area in a second higher-order propagation mode is 180 μm2 or larger. An effective refractive index in the second higher-order propagation mode is larger than the refractive index of the cladding portion by 0.0002 or more, and an effective refractive index in a third higher-order propagation mode is less than the refractive index of the cladding portion.
摘要翻译： 光纤包括芯部和围绕芯部的外周形成并具有低于芯部的最大折射率的折射率的包层部。 作为波长1550nm的特性，基本传播模式的有效核心面积为120μm2以上，第一高阶传播模式中的有效核心面积为150μm2以上，第二高的有效核心面积 - 传播模式为180μm2以上。 第二高阶传播模式中的有效折射率大于包层部分的折射率为0.0002以上，第三高阶传播模式中的有效折射率小于包层部分的折射率 。
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公开(公告)号：US11860407B2
公开(公告)日：2024-01-02
申请号：US17456601
申请日：2021-11-26
CPC分类号： G02B6/02395 , G02B6/02004 , G02B6/0365 , G02B6/03627
摘要： An optical fiber includes: a core made of silica-based glass; a cladding configured to cover an outer circumference of the core and made of silica-based glass having a refractive index smaller than a maximum refractive index of the core; and a coating configured to cover an outer circumference of the cladding. The cladding has an outer diameter of 120 μm or smaller, a mode field diameter at a wavelength of 1310 nm is 8.6 μm to 9.2 μm, an effective cut-off wavelength is 1260 μm or smaller, and a bending loss at a wavelength of 1550 nm in a case of bending at a diameter of 20 mm is 0.75 dB/turn or smaller.
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公开(公告)号：US11709313B2
公开(公告)日：2023-07-25
申请号：US17655486
申请日：2022-03-18
发明人： Kazunori Mukasa
CPC分类号： G02B6/03633 , G02B6/02 , G02B6/02004 , G02B6/036 , G02B6/0365 , G02B6/02214
摘要： An optical fiber includes: a core portion made of glass; and a cladding portion made of glass, having a refractive index lower than the refractive index of the core portion, and positioned on an outer periphery of the core portion. Further, the cladding portion has an outer diameter smaller than 100 μm, and the core portion has a relative refractive-index difference of 0.32% to 0.40% with respect to the cladding portion.
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公开(公告)号：US09128237B2
公开(公告)日：2015-09-08
申请号：US13962642
申请日：2013-08-08
发明人： Kazunori Mukasa
CPC分类号： G02B6/03627 , G02B6/02 , G02B6/02019 , G02B6/02042 , G02B6/02047 , G02B6/0365
摘要： An optical fiber includes a core portion and a cladding portion that is formed on an outer periphery of the core portion and has a refractive index lower than a maximum refractive index of the core portion. Characteristics at a wavelength of 1550 nm are an effective core area of a fundamental propagation mode of equal to or larger than 120 μm2, an effective core area of a first higher-order propagation mode of equal to or larger than 170 μm2, and an effective refractive index of the first higher-order propagation mode of larger than the refractive index of the cladding portion by equal to or larger than 0.0005.
摘要翻译： 光纤包括芯部和包层部分，其形成在芯部分的外周上并具有低于芯部的最大折射率的折射率。 波长1550nm处的特性是等于或大于120μm2的基本传播模式的有效核心区域，等于或大于170μm2的第一高阶传播模式的有效核心区域，以及有效核心区域 第一高阶传播模式的折射率大于包层部分的折射率等于或大于0.0005。
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