-
公开(公告)号：US20140153883A1
公开(公告)日：2014-06-05
申请号：US14173467
申请日：2014-02-05
Applicant: FURUKAWA ELECTRIC CO., LTD
Inventor： Kazunori MUKASA
IPC: G02B6/02
CPC classification number: G02B6/02042 , H04B10/2581 , H04J14/02 , H04J14/04
Abstract: A multi-core optical fiber includes a plurality of core portions, and a cladding portion positioned at outer peripheries of the plurality of core portions, the cladding portion having a refractive index lower than a maximum refractive index of each of the core portions, in which each of the core portions propagates light only with predetermined number, which is equal to or greater than 2, of propagation modes, and an effective core area at wavelength of 1550 nm of each of the propagation modes is equal to or greater than 120 μm2.
Abstract translation: 多芯光纤包括多个芯部和位于多个芯部的外周的包层部，该包层部的折射率低于各芯部的最大折射率，其中， 每个核心部分仅以传播模式的等于或大于2的预定数量传播光，并且每个传播模式的1550nm的波长的有效核心面积等于或大于120μm2。
-
公开(公告)号：US20130298380A1
公开(公告)日：2013-11-14
申请号：US13942105
申请日：2013-07-15
Applicant: Furukawa Electric Co., Ltd
Inventor： Kazunori MUKASA
IPC: H04B10/00
CPC classification number: H04B10/12 , C03B37/01225 , C03B2203/14 , C03B2203/222 , C03B2203/42 , G02B6/02323 , G02B6/02347 , Y10T29/49826
Abstract: A method of manufacturing a photonic bandgap fiber, which includes: a core portion; and a cladding portion that is formed around the core portion and has holes arranged to form a photonic crystal in which the core portion is a crystal defect, includes: forming a preform by inserting, into a jacket tube, hexagonal capillary tubes having tube-holes shapes and outer shapes that are both approximately hexagonal; and drawing the preform.
Abstract translation: 一种制造光子带隙光纤的方法，包括：芯部; 以及包围部，其形成在所述芯部的周围并且具有配置成形成所述芯部为晶体缺陷的光子晶体的孔，包括：通过将具有管孔的六边形毛细管管插入到套管中而形成预成型体 形状和外形大致六边形; 并绘制预成型件。
-
23.发明申请公开(公告)号：US20130251323A1
公开(公告)日：2013-09-26
申请号：US13889936
申请日：2013-05-08
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Kazunori MUKASA
IPC: G02B6/02
CPC classification number: G02B6/02 , G02B6/02004 , G02B6/02009 , G02B6/02014 , G02B6/02019 , G02B6/02023 , G02B6/03627
Abstract: 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.
Abstract translation: 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，基本传播方式的有效核心面积为120mum2以上，第一高阶传播方式的有效核心面积为150m2以上，有效核心面积为第二高 - 传播模式为180 mum2或更大。 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 。
-
公开(公告)号：US20240027679A1
公开(公告)日：2024-01-25
申请号：US18481336
申请日：2023-10-05
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Kazunori MUKASA
CPC classification number: G02B6/03622 , G02B6/02009 , G02B6/0281 , G02B6/02042
Abstract: An optical fiber includes: a core portion; a side core layer circumferentially surrounding the core portion; a cladding portion circumferentially surrounding the side core layer; and a coating layer circumferentially surrounding the cladding portion. When an average maximum relative refractive-index difference of the core portion to an average refractive index of the cladding portion is Δ1, a relative refractive-index difference of an average refractive index of the side core layer to the average refractive index of the cladding portion is Δ2, a relative refractive-index difference of the average refractive index of the cladding portion to pure silica glass is ΔClad, Δ1 >ΔClad>Δ2 and 0>Δ2 hold, the Δ1 is 0.18% or more and 0.24% or less, the Δ2 is −0.27% or more and −0.12% or less, and (Δ1−Δ2) is 0.36% or more and 0.45% or less.
-
公开(公告)号：US20230324606A1
公开(公告)日：2023-10-12
申请号：US18327503
申请日：2023-06-01
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Kazunori MUKASA
CPC classification number: G02B6/03633 , G02B6/0365 , G02B6/036 , G02B6/02 , G02B6/02004 , G02B6/02214
Abstract: 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.
-
Patent Agency Ranking
公开(公告)号：US20230244027A1
公开(公告)日：2023-08-03
申请号：US18295541
申请日：2023-04-04
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Kazunori MUKASA
CPC classification number: G02B6/028 , G02B6/036 , G02B6/02395
Abstract: An optical fiber includes: a core portion; a side core layer surrounding a circumference of the core portion; and a cladding portion surrounding a circumference of the side core layer. Relations, Δ1 > ΔClad > Δ2 and 0 > Δ2, hold, where Δ1 denotes an average maximum relative refractive-index difference of the core portion with respect to an average refractive index of the cladding portion, Δ2 denotes a relative refractive-index difference of an average refractive index of the side core layer with respect to the average relative refractive index of the cladding portion, and ΔClad denotes a relative refractive-index difference of the average refractive index of the cladding portion with respect to pure quartz glass, Δ1 is 0.24% or more and 0.30% or less, Δ2 is -0.27% or more and -0.08% or less, (Δ1 - Δ2) is 0.36% or more and 0.57% or less.
-
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.
-
公开(公告)号：US20220413208A1
公开(公告)日：2022-12-29
申请号：US17894292
申请日：2022-08-24
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Kazunori MUKASA
Abstract: A multi-core fiber includes: a plurality of core portions each including a central core portion, an intermediate layer formed on an outer periphery of the central core portion, and a trench layer formed on an outer periphery of the intermediate layer; and a cladding portion formed on an outer periphery of the plurality of core portions, wherein in each of the plurality of core portions, Δ1>Δ2>Δ3 and 0%>Δ3>−0.3% are satisfied, where Δ1 is an average maximum relative refractive-index difference of the central core portion, Δ2 is an average relative refractive-index difference of the intermediate layer, and Δ3 is an average relative refractive-index difference of the trench layer, with respect to the cladding portion.
-
公开(公告)号：US20210364692A1
公开(公告)日：2021-11-25
申请号：US17393993
申请日：2021-08-04
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Kazunori MUKASA
IPC: G02B6/036 , G02B6/02 , C03B37/018 , C03B37/027
Abstract: 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.
-
公开(公告)号：US20210356657A1
公开(公告)日：2021-11-18
申请号：US17388187
申请日：2021-07-29
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Kazunori MUKASA
Abstract: An optical fiber includes: a core portion made of glass; a cladding portion that is located on an outer periphery of the core portion and that is made of glass having a lower refractive index than a refractive index of the core portion; and a coating portion that covers an outer periphery of the cladding portion. Further, an average value of a relative refractive-index difference of a center core of the core portion is 0.1 to 0.5%, a fiber diameter including the coating portion is equal to or smaller than 220 μm, an effective cutoff wavelength is longer than 1260 nm and smaller than 1530 nm, and a mode field diameter of light at 1550 nm is equal to or larger than 9 μm.
-
-
-
-
-
-
-
-
-
Search Results
33
records
(took 0.022 seconds)
