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1. 发明专利

JP2012037782A Hole-assisted optical fiber 有权
标题翻译：孔辅助光纤
公开(公告)号：JP2012037782A
公开(公告)日：2012-02-23
申请号：JP2010179058
申请日：2010-08-09
申请人： Furukawa Electric Co Ltd:The , Nippon Telegr & Teleph Corp , 古河電気工業株式会社 , 日本電信電話株式会社
发明人： KUMANO NAOMI , SHIMOTAKAHARA IWAO , SUGIZAKI RYUICHI , YAGI TAKESHI , SHIMIZU TOMOYA , MATSUI TAKASHI , GOTO YUKIHIRO , KURASHIMA TOSHIO , NAKAJIMA KAZUHIDE
IPC分类号： G02B6/00
CPC分类号： G02B6/032 , G02B6/02333 , G02B6/02366 , G02B6/03627
摘要： PROBLEM TO BE SOLVED: To provide a hole-assisted optical fiber which has good bending loss characteristics, is suitable for use as optical fibers for optical communication, and has a large design margin for achieving desired properties.SOLUTION: A hole-assisted optical fiber is provided with a core and a cladding having an inner cladding layer and an outer cladding layer and having a plurality of holes formed around the core, in which the diameter of the core is 3 μm to 9.8 μm, the relative refractive index difference of the core relative to the outer cladding layer is 0.11% to 0.45%, the outer diameter of the inner cladding layer is 53 μm or less, the relative refractive index difference of the inner cladding layer relative to the outer cladding layer is a negative value greater than or equal to -0.30%, the diameter of the holes is 2.4 μm to 4.0 μm, the hole occupancy rate is 17% to 48%, the bending loss at a wavelength of 1625 nm when bent at a 5 mm radius is 1 dB/turn or less, and the cutoff wavelength is 1550 nm or less.
摘要翻译：要解决的问题：为了提供具有良好弯曲损耗特性的孔辅助光纤，适合用作光通信用光纤，并且具有用于实现期望特性的大的设计余量。解决方案：空穴辅助光纤设置有具有内包层和外包层的芯和包层，并且具有形成在芯周围的多个孔，其中芯的直径为3μm 芯的相对折射率差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，内包层的相对折射率差为外包层的负值大于或等于-0.30％，孔的直径为2.4μm〜4.0μm，孔占有率为17〜48％，波长1625nm处的弯曲损耗当半径为5mm弯曲为1dB /匝以下时，截止波长为1550nm以下。版权所有（C）2012，JPO＆INPIT

2. 发明专利

JP2013097172A Passive optical transmission system and optical fiber for high-intensity transmission for use in the same 有权
标题翻译：被动光传输系统和用于高强度传输的光纤
公开(公告)号：JP2013097172A
公开(公告)日：2013-05-20
申请号：JP2011240023
申请日：2011-11-01
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： NAKAJIMA KAZUHIDE , MATSUI TAKASHI , FUKAI CHISATO , GOTO YUKIHIRO
IPC分类号： G02B6/036 , G02B6/02 , G02B6/032 , G02B6/04
摘要： PROBLEM TO BE SOLVED: To implement a passive optical transmission system capable of longer-distance transmission and an optical fiber for high-intensity transmission for use in the same.SOLUTION: A parallel transmission type optical fiber for high-intensity transmission which has a cross-sectional structure having four core parts arranged at intervals Λ like a square lattice in a clad part having a diameter D of 125±1 μm and a uniform refractive index, wherein each core part comprises a first core region, a second core region, and a third core region, or a core-expanded optical fiber for high-intensity transmission which has a cross-sectional structure having core parts arranged at intervals Λ like a hexagonal close pack in a clad part having a diameter D of 125±1 μm and a uniform refractive index, wherein core parts have a diameter 2a and a relative refractive index difference Δ to the clad part, is used as an optical fiber 2 for high-intensity transmission between a transmitter 1 and a passive optical multiplexer/demultiplexer 3.
摘要翻译：要解决的问题：实现能够进行长距离传输的无源光传输系统和用于高强度传输的光纤。解决方案：一种用于高强度传输的并行传输型光纤，其具有横截面结构，该截面结构具有在直径D为125±1μm的包层部分中以间隔Λ像正方形格子排列的四个芯部，以及均匀折射率，其中每个芯部分包括第一芯区域，第二芯区域和第三芯区域，或用于高强度透射的芯扩展光纤，其具有横截面结构，其具有间隔排列的芯部件 Λ像直径D为125±1μm，均匀折射率的包层部分的六边形封装，其中芯部具有直径2a和包层部分的相对折射率差Δ用作光纤 2用于发射机1和无源光复用器/解复用器3之间的高强度传输。版权所有：（C）2013，JPO＆INPIT

3. 发明专利

JP2013088457A Four-core single mode optical fiber and optical cable 有权
标题翻译：四芯单模光纤和光电缆
公开(公告)号：JP2013088457A
公开(公告)日：2013-05-13
申请号：JP2011225743
申请日：2011-10-13
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： NAKAJIMA KAZUHIDE , GOTO YUKIHIRO , MATSUI TAKASHI , FUKAI CHISATO
IPC分类号： G02B6/04 , G02B6/02
摘要： PROBLEM TO BE SOLVED: To provide a four-core single mode optical fiber and an optical cable capable of improving crosstalk characteristics between adjacent cores while suppressing increase of the number of holes in an optical fiber cross section and refractive index distribution of the cores to be formed in multilayer.SOLUTION: By arranging four core parts 2 in a square lattice shape or in a linear shape within a cross section of a clad part 1, and arranging a low refractive index area 3 having a cross section area for which reduction of the effective cross section of the respective core parts 2 is below 1% and a refractive index smaller than the refractive index of the clad part 1 at the center between the respective adjacent core parts 2 within the cross section of the clad part 1, the crosstalk characteristics between the adjacent cores are reduced to be 50%-10% or less without increase of the number of holes in an optical fiber cross section and refractive index distribution of the core parts to be formed in multilayer.
摘要翻译：要解决的问题：为了提供一种四芯单模光纤和光缆，其能够在抑制光纤截面中的孔数增加和折射率分布的同时改善相邻芯之间的串扰特性芯将形成多层。解决方案：通过在包层部分1的横截面内布置方形格子形状或线状形状的四个芯部件2，并且布置具有横截面积的低折射率区域3，各芯部2的横截面低于1％，折射率小于包层部1的截面内的各相邻芯部2之间的中心处的包层部1的折射率，折射率之间的串扰特性在不增加光纤截面中的孔数和要形成多层的芯部的折射率分布的情况下，相邻的芯减小到50％-10％以下。版权所有（C）2013，JPO＆INPIT

4. 发明专利

JP2012063340A Method of measuring hole diameter, hole position, hole surface roughness, or bending loss of an optical fiber with a hole, method of manufacturing optical fiber with hole, and method of testing optical fiber line with hole 有权
标题翻译：测量孔直径，孔位置，孔表面粗糙度或孔弯曲光纤损失的方法，用孔制造光纤的方法和测量具有孔的光纤线的方法
公开(公告)号：JP2012063340A
公开(公告)日：2012-03-29
申请号：JP2011021886
申请日：2011-02-03
申请人： Fujikura Ltd , Nippon Telegr & Teleph Corp , 日本電信電話株式会社 , 株式会社フジクラ
发明人： ISHIDA ITARU , TANIGAWA SHOJI , MATSUO SHOICHIRO , KURASHIMA TOSHIO , NAKAJIMA KAZUHIDE , SHIMIZU TOMOYA , MATSUI TAKASHI , GOTO YUKIHIRO
IPC分类号： G01B11/12 , C03B37/025 , G01B11/00 , G01B11/30 , G01M11/02 , G02B6/00 , G02B6/032
CPC分类号： G01B11/08 , G01B11/24 , G01B11/30 , G01B11/303 , G01B11/306 , G01N21/954 , G01N21/958
摘要： PROBLEM TO BE SOLVED: To easily know a hole diameter, a hole position, hole surface roughness, and bending loss, etc., of an optical fiber with a hole without cutting the optical fiber with the hole when measuring the hole diameter of the optical fiber with the hole.SOLUTION: Two-directional OTDR measurement is carried out in which reference optical fibers 2 are connected to both ends of an optical fiber 3 with the hole respectively and measurement light beams are made incident from both ends of the connected optical fiber 2 to measure back-scattered light beams. An arithmetic mean value lref at a part of the reference optical fibers 2 and an arithmetic mean value lhf(x) at a position (x) of the optical fiber 3 with the hole are calculated from two obtained back-scattered light waveforms, and a difference (Ihf-Iref) ΔI between the arithmetic mean value lhf and arithmetic mean value lref is found. Based upon the correlation between the found difference ΔI and the hole diameter of the optical fiber 3 with the hole, the hole diameter, the hole position, the surface roughness of the hole, and the bending loss at the position (x) are found.
摘要翻译：要解决的问题：为了容易地知道当测量孔直径时，具有孔的光纤的孔径，孔位置，孔表面粗糙度和弯曲损耗等，而不用孔切割光纤的光纤与孔。
解决方案：进行双向OTDR测量，其中参考光纤2分别连接到具有孔的光纤3的两端，并且测量光束从连接的光纤2的两端入射到测量背散射光束。根据两个获得的反向散射光波形，计算参考光纤2的一部分的算术平均值lref和具有孔的光纤3的位置（x）处的算术平均值lhf（x），并且求出算术平均值lhf与算术平均值lref之差（Ihf-Iref）ΔI。基于发现的差ΔI与具有孔的光纤3的孔径，孔直径，孔位置，孔的表面粗糙度以及位置（x）处的弯曲损耗之间的相关性。版权所有（C）2012，JPO＆INPIT

5. 发明专利

JP2014031303A Optical fiber base material manufacturing method and optical fiber 审中-公开
标题翻译：光纤基材料制造方法和光纤
公开(公告)号：JP2014031303A
公开(公告)日：2014-02-20
申请号：JP2012174281
申请日：2012-08-06
申请人： Sumitomo Electric Ind Ltd , 住友電気工業株式会社 , Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： NAGASHIMA TAKUSHI , TARU TOSHIKI , SHIMIZU TOMOYA , GOTO YUKIHIRO
IPC分类号： C03B37/012 , C03B37/018 , C03C13/04 , G02B6/032 , G02B6/036
CPC分类号： C03B37/01208 , C03B37/0122 , C03B2203/42
摘要： PROBLEM TO BE SOLVED: To provide a method capable of manufacturing an optical fiber base material having plural holes extending in a longitudinal direction at low costs and with high accuracy.SOLUTION: In an optical fiber base material manufacturing method according to the present invention, a jacket is formed around a core material to manufacture an optical fiber base material. The method includes: a starting material manufacturing step of manufacturing a starting material 10 by adding a third region 13 with larger viscosity than that of the core material outside of the core material comprising a first region 11 and a second region 12 surrounding the first region 11; an accumulation step of accumulating glass fine particles around the starting material 10; and a sintering step of forming the jacket by sintering the accumulating glass fine particles and making them transparent. Ge is added to the first region 11. Cl or F is added to the second region 12, and the second region 12 has plural holes 14 extending in a longitudinal direction. At temperatures of 1300-1700°C during the sintering step, a viscosity of the third region 13 is larger than that of the second region 12.
摘要翻译：要解决的问题：提供一种能够以低成本和高精度制造具有沿纵向延伸的多个孔的光纤基材的方法。解决方案：在根据本发明的光纤基材制造方法中，护套形成在芯材周围以制造光纤基材。该方法包括：起始材料制造步骤，通过添加具有比包含第一区域11的芯材料外的芯材的粘度大的第三区域13和包围第一区域11的第二区域12来制造原料10 ; 在原料10的周围积聚玻璃微粒的积累步骤; 以及烧结步骤，通过烧结积聚的玻璃微粒并使其透明地形成夹套。 Ge添加到第一区域11.将Cl或F加入到第二区域12中，并且第二区域12具有在纵向方向上延伸的多个孔14。在烧结步骤中，在1300-1700℃的温度下，第三区域13的粘度大于第二区域12的粘度。

6. 发明专利

JP2013088608A Optical fiber for short wavelength transmission and optical transmission system therefor 有权
标题翻译：用于短波长传输的光纤和光传输系统
公开(公告)号：JP2013088608A
公开(公告)日：2013-05-13
申请号：JP2011228878
申请日：2011-10-18
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： NAKAJIMA KAZUHIDE , MATSUI TAKASHI , FUKAI CHISATO , GOTO YUKIHIRO
IPC分类号： G02B6/036 , G02B6/00 , G02B6/032 , G02B6/04
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber for short wavelength transmission which is in the form of an SMF (single mode fiber) with an expanded effective cross-sectional area suitable for optical communication in the 800 nm wavelength band, and is capable of eliminating limits on transmission imposed by multimode noise in an optical transmission system that uses the wavelength band.SOLUTION: An optical fiber for short wavelength transmission includes a cladding 101 having a diameter of 125±1 μm and a uniform refractive index, and seven cores 102 each having a diameter 2a and a relative refractive index difference with respect to the cladding 101 of Δ. The seven cores 102 comprises one core 102 located in the center of the cladding 101 and six cores 102 located around the one core 102 in a hexagonal close-packed structure with an intercore spacing of Λ. The cores 102 are designed to each have a diameter 2a of 1.5 to 2.5 μm, a normalized frequency of 0.34 to 0.48, and a normalized intercore distance Λ/2a of 1.2 to 2.4.
摘要翻译：要解决的问题：提供一种SMF（单模光纤）形式的短波长传输光纤，其具有适用于800nm波长带中的光通信的有效横截面面积，以及能够消除使用波长带的光传输系统中由多模式噪声引起的传输的限制。解决方案：用于短波长传输的光纤包括直径为125±1μm和均匀折射率的包层101，以及七个芯102，每个芯102具有直径2a和相对于包层的相对折射率差 101的Δ。七个芯102包括位于包层101的中心的一个芯102和六个紧密堆叠结构围绕一个芯102定位的核心102，其间距为Λ。芯102被设计成各自具有1.5至2.5μm的直径2a，0.34至0.48的归一化频率和1.2至2.4的归一化的晶间距离Λ/ 2a。版权所有（C）2013，JPO＆INPIT

7. 发明专利

JP2012150002A Cutoff wavelength measuring method, operation mode determination method and apparatus for the methods 审中-公开
标题翻译：切割波长测量方法，操作模式确定方法和方法
公开(公告)号：JP2012150002A
公开(公告)日：2012-08-09
申请号：JP2011008853
申请日：2011-01-19
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： MATSUI TAKASHI , NAKAJIMA KAZUHIDE , GOTO YUKIHIRO , KURASHIMA TOSHIO
IPC分类号： G01M11/00 , G01M11/02
摘要： PROBLEM TO BE SOLVED: To specify a cutoff wavelength even in an optical fiber in which a wavelength characteristic of a loss difference between a basic mode and a first higher order mode is easy.SOLUTION: A light wave of a predetermined wavelength is extracted from a light wave generated from a wide band light source 1 by a spectrometer 2, the extracted light wave is made to incident on one end of an optical fiber A to be measured, and based on optical power outputted from a light receiving part 4 when an aperture angle on a variable aperture 3 is successively changed in a state excited in a multimode, a mode field diameter is calculated. The calculation of the mode field diameter is repeated by changing the wavelength extracted by the spectrometer 2 to measure the wavelength characteristics of mode field diameters in multimode excitation. A higher order mode remover 7 is inserted between the spectrometer 2 and one end of the optical fiber A to be measured, the wavelength characteristics of mode field diameters in single mode excitation is similarly measured, and a wavelength indicating that a compared value between both the wavelength characteristics becomes a predetermined value is set as a cutoff wavelength.
摘要翻译：要解决的问题：即使在基本模式和第一高阶模式之间的损耗差的波长特性容易的光纤中，也要指定截止波长。解决方案：通过光谱仪2从宽带光源1产生的光波提取预定波长的光波，使提取的光波入射到待测量的光纤A的一端并且当在多模中激励的状态下连续改变可变孔径3上的孔径角时，基于从光接收部分4输出的光功率，计算模场直径。通过改变由光谱仪2提取的波长来重复模场直径的计算，以测量多模激发中的模场直径的波长特性。在光谱仪2和待测光纤A的一端之间插入高阶模式移除器7，类似地测量单模激发中的模场直径的波长特性，并且指示两者之间的比较值波长特性变为预定值被设置为截止波长。版权所有（C）2012，JPO＆INPIT

8. 发明专利

JP2013125064A Cutoff wavelength-controlled optical fiber and optical fiber cable 有权
标题翻译：切割波长控制光纤和光纤电缆
公开(公告)号：JP2013125064A
公开(公告)日：2013-06-24
申请号：JP2011272269
申请日：2011-12-13
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： GOTO YUKIHIRO , NAKAJIMA KAZUHIDE
IPC分类号： G02B6/02
摘要： PROBLEM TO BE SOLVED: To achieve both reduction of a bend loss and increase of a mode field diameter (MFD) while suppressing an increase in cutoff wavelength.SOLUTION: A cutoff wavelength-controlled optical fiber comprises a clad 1 having a uniform refractive index, and a core 2 having a higher refractive index than that of the clad 1 and disposed at a center of the clad 1. When the refractive index of the core 2 is nand the refractive index of the clad 1 is n, relative refractive index difference Δ between the clad 1 and the core 2 is defined by the formula 10. Standardized frequency V of the core 2 at a wavelength of 1550 nm is set in a range of 2.00 to 3.35, and outer diameter D of the clad 1 is set in a range of 50 to 119 μm.
摘要翻译：要解决的问题：同时抑制截止波长的增加同时实现弯曲损耗的减小和模场直径（MFD）的增加。解决方案：截止波长控制光纤包括具有均匀折射率的包层1和具有比包层1的折射率更高的折射率的芯2并且设置在包层1的中心处。当折射率芯2的折射率为n 1 ，包层1的折射率为n 2 ，相对折射率差Δ 包层1和芯2由公式10定义。芯体2在1550nm波长处的标准化频率V设定在2.00至3.35的范围内，并且包层1的外径D被设定在一定范围内为50〜119μm。版权所有（C）2013，JPO＆INPIT

9. 发明专利

JP2013097173A Parallel optical transmission system and optical fiber used therefor 有权
标题翻译：并联光传输系统及其使用的光纤
公开(公告)号：JP2013097173A
公开(公告)日：2013-05-20
申请号：JP2011240024
申请日：2011-11-01
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： NAKAJIMA KAZUHIDE , MATSUI TAKASHI , FUKAI CHISATO , GOTO YUKIHIRO
IPC分类号： G02B6/04 , G02B6/036 , H04B10/25 , H04B10/556 , H04J14/00 , H04J14/04 , H04J14/06
摘要： PROBLEM TO BE SOLVED: To provide a parallel optical transmission system capable of suppressing accumulation of multimode noise and deterioration in transmission characteristics due to deviation in a transmission path length using an input element and an output element having an end face structure similar to conventional transmitters and receivers for multimode optical fibers.SOLUTION: The parallel optical transmission system employs: a four-core fiber having such a cross-section structure in which four core parts 12 for single mode transmission are disposed into a square lattice shape within an area of 50 μm in the cross section of a cladding 11; and the transmitter and the receiver that include an input element and an output element respectively and have an end face structure with the diameter or the one side length of 50 μm being similar to the core diameter of the general-purpose multimode optical fiber.
摘要翻译：要解决的问题：提供一种并行光传输系统，其能够使用输入元件和具有类似于端子结构的输出元件的输出元件和输出元件，能够抑制多模式噪声的累积和由于传输路径长度的偏差导致的传输特性的劣化用于多模光纤的传统发射机和接收机。解决方案：并行光传输系统采用：具有这种横截面结构的四芯光纤，其中用于单模传输的四个核心部分12在十字形中在50μm的区域内被设置成正方形格子状包层11的截面; 并且分别包括输入元件和输出元件并且具有直径或一侧长度为50μm的端面结构的发射器和接收器类似于通用多模光纤的芯径。版权所有（C）2013，JPO＆INPIT

10. 发明专利

JP2012042389A Method of measuring distribution of bent loss in longitudinal direction of optical fiber and optical fiber line, method of testing optical line, and method of manufacturing optical fiber 有权
标题翻译：测量光纤和光纤线的纵向方向上的弯曲损耗分布的方法，测量光线的方法和制造光纤的方法
公开(公告)号：JP2012042389A
公开(公告)日：2012-03-01
申请号：JP2010185320
申请日：2010-08-20
申请人： Fujikura Ltd , Nippon Telegr & Teleph Corp , 日本電信電話株式会社 , 株式会社フジクラ
发明人： TANIGAWA SHOJI , ISHIDA ITARU , MATSUO SHOICHIRO , KURASHIMA TOSHIO , NAKAJIMA KAZUHIDE , SHIMIZU TOMOYA , MATSUI TAKASHI , GOTO YUKIHIRO
IPC分类号： G01M11/00
CPC分类号： G01M11/39 , G01M11/3145
摘要： PROBLEM TO BE SOLVED: To measure the distribution of bent loss in the longitudinal direction of an optical fiber by a bidirectional OTDR measuring method.SOLUTION: In the method for measuring the distribution of bent loss in the longitudinal direction of the optical fiber, an arithmetic mean value I(x) is calculated from two back-scattered light intensity values, on a position x, of two back-scattered light beams obtained by bidirectional OTDR measurement of the optical fiber, and a bent loss value is obtained from a mode field diameter 2W(x) and a relative refractive index difference Δ(x) on the position x, which are calculated from the arithmetic mean value I(x). When obtaining the bent loss value, it is preferable that the target optical fiber is regarded as an optical fiber having step type refractive index distribution equivalent to the refractive index distribution of the target optical fiber and the bent loss value on the position x is calculated from a relational expression of a standardized frequency V of the optical fiber having the step type refractive index distribution, a core radius (a) and a node field diameter 2W.
摘要翻译：要解决的问题：通过双向OTDR测量方法测量光纤的纵向弯曲损耗的分布。解决方案：在用于测量光纤纵向弯曲损耗分布的方法中，算术平均值I（x）由两个反向散射光强度值计算，位置x为2 从位置x上的模场直径2W（x）和相对折射率差Δ（x）获得的通过光纤的双向OTDR测量获得的背散射光束和弯曲损耗值，其从算术平均值I（x）。当获得弯曲损耗值时，优选将目标光纤视为具有与目标光纤的折射率分布相当的阶梯型折射率分布的光纤，并且从位置x计算弯曲损耗值具有阶梯型折射率分布的光纤的标准化频率V，芯半径（a）和节点场直径2W的关系表达式。版权所有（C）2012，JPO＆INPIT

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