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41. 发明专利

JP2007298335A Characteristic evaluation method, device and program of single mode optical fiber 有权
标题翻译：特征评估方法，单模光纤的器件和程序
公开(公告)号：JP2007298335A
公开(公告)日：2007-11-15
申请号：JP2006125286
申请日：2006-04-28
申请人： Nippon Telegr & Teleph Corp , Osaka Prefecture Univ , 公立大学法人大阪府立大学 , 日本電信電話株式会社
发明人： NAKAJIMA KAZUHIDE , OHASHI MASAHARU
IPC分类号： G01M11/02
摘要： PROBLEM TO BE SOLVED: To provide a characteristic evaluation device of a single mode optical fiber capable of evaluating nondestructively and highly accurately a distribution characteristic in the longitudinal direction between connected optical fibers, in an optical fiber transmission path constituted of a plurality of single mode optical fibers.
SOLUTION: This device has a back-scattering light intensity measuring device 11 for measuring back-scattering light intensity S (λ, z) on a position z of the single mode optical fiber 13 on both ends, when pulse light having the wavelength λ is allowed to enter the single mode optical fiber 13 having an optional length L; and a back-scattering light intensity waveform analyzer 12 for operating a specific refractive index difference Δ(z) on an optional position z of the single mode optical fiber 13 by using a normalization structure inconsistency loss component In (λ, z) on the position z of the single mode optical fiber 13 operated from the back-scattering light intensity S (λ, z), and a mode field diameter 2W (λ, z
0 ) and the specific refractive index difference Δ(z
0 ) at its optional reference point z
0 .
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种能够以非破坏性和高精度评估连接的光纤之间的纵向分布特性的单模光纤的特性评估装置，在由多个单模光纤。解决方案：该装置具有背散射光强度测量装置11，用于测量两端单模光纤13位置z处的反散射光强度S（λ，z），当具有允许波长λ进入具有任选长度L的单模光纤13; 以及用于通过使用位置上的归一化结构不一致性损耗分量In（λ，z）来操作单模光纤13的可选位置z上的特定折射率差Δ（z）的后向散射光强度波形分析器12 （λ，z）和模场直径2W（λ，z 0 ）和比折射率差Δ（ z 0 ）在其可选参考点z 0 。版权所有（C）2008，JPO＆INPIT

42. 发明专利

JP2007010726A Dispersion compensating fiber and optical transmission line 有权
标题翻译：分散补偿光纤和光传输线
公开(公告)号：JP2007010726A
公开(公告)日：2007-01-18
申请号：JP2005187991
申请日：2005-06-28
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： NAKAJIMA KAZUHIDE , MATSUI TAKASHI , MIKAWA IZUMI
IPC分类号： G02B6/02 , G02B6/036
摘要： PROBLEM TO BE SOLVED: To provide a dispersion compensating fiber which is arranged both before and behind an optical transmission line including a dispersion shift fiber to improve high-speed optical transmission characteristics mainly in a wavelength range of 1,575 to 1,625 nm. SOLUTION: The dispersion compensating fiber which has a clad portion 33 having a uniform refractive index, a first core portion 31 having a specific refractive index difference Δ from the clad portion 33, and a second core portion 32 having a specific refractive index difference Δ1 from the clad portion 33 so that the ratio Ra of the radius a1 of the first core portion 31 to the radius (a) up to the second core portion 32, the ratio RΔ of the specific refractive index difference Δ1 of the second core section 32 to the specific refractive index difference Δ of the first core portion 31, the radius (a) up to the second core portion 32, and the specific refractive index difference Δ of the first core portion 31 are respectively 0.3 to 0.5, -0.8 to -0.4, 5.6 to 8.9 μm, and 0.4 to 0.9% is arranged both before and behind the optical transmission line including the dispersion shift fiber. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种色散补偿光纤，其布置在包括色散位移光纤的光传输线之前和之后，主要在1,575至1,625nm的波长范围内提高高速光传输特性。解决方案：具有折射率均匀的包层部分33，与包层部分33具有特定折射率差Δ的第一芯部分31和具有特定折射率的第二芯部分32的色散补偿光纤与包层部33的差Δ1，使得第一芯部31的半径a1与半径（a）直到第二芯部32的比Ra，第二芯的比折射率差Δ1的比RΔ 第一芯部31的比折射率差Δ，第二芯部32的半径（a）和第一芯部31的比折射率差Δ分别为0.3〜0.5，-0.8 至-0.4,5.6至8.9μm，并且在包括色散位移光纤的光传输线之前和之后布置0.4至0.9％。版权所有（C）2007，JPO＆INPIT

43. 发明专利

JP2005234192A Dispersion-compensating fiber and raman amplification transmission system 审中-公开
标题翻译：分散补偿光纤和拉曼放大传输系统
公开(公告)号：JP2005234192A
公开(公告)日：2005-09-02
申请号：JP2004042785
申请日：2004-02-19
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： FUKAI CHISATO , NAKAJIMA KAZUHIDE , MIKAWA IZUMI
IPC分类号： G02B6/02 , G02B6/036 , G02B6/10 , G02F1/35 , H01S3/10 , H01S3/30 , H04B10/2507 , H04B10/2525 , H04B10/29 , H04B10/291 , G02B6/22 , H04B10/02 , H04B10/16 , H04B10/17 , H04B10/18
摘要： PROBLEM TO BE SOLVED: To provide a dispersion-compensating fiber which utilizes 1.3 μm band zero dispersion single-mode optical fiber and which is suitable for a high-speed Raman amplification transmission system and the Raman amplification transmission system. SOLUTION: The dispersion-compensating fiber F 2 is connected to a termination of 1.3 μm band zero dispersion single-mode optical fiber F 1 so as to construct the high-speed Raman amplification transmission system. In this case, signal-to-noise ratio characteristics are improved by optimally designing the ratio of a length L 1 of 1.3 μm band zero dispersion single-mode optical fiber F 1 to a length L 2 of the dispersion-compensating fiber F 2 (L 2 /L 1 ) and Raman gain of the dispersion-compensating fiber F 2 . COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种利用1.3μm波段零色散单模光纤并且适用于高速拉曼放大传输系统和拉曼放大传输系统的色散补偿光纤。
解决方案：色散补偿光纤F 2 连接到1.3μm波段零色散单模光纤F 1 的终端，以便构成高高速拉曼放大传输系统。在这种情况下，通过最佳地设计1.3μm波段零色散单模光纤F 1 的长度L SB> 1 的比值，提高了信噪比特性，分散补偿纤维F 2 （L 2 / L 1 ）和长度L 2 色散补偿光纤F 2 的增益。版权所有（C）2005，JPO＆NCIPI

44. 发明专利

JP2014206517A 多コア光ファイバのクロストーク特性の評価方法及びそのシステム有权
标题翻译：多光纤光纤光栅特性的评估方法及其系统
公开(公告)号：JP2014206517A
公开(公告)日：2014-10-30
申请号：JP2013085646
申请日：2013-04-16
申请人：日本電信電話株式会社 , Nippon Telegr & Teleph Corp
发明人： NAKAJIMA KAZUHIDE , FUKAI CHISATO
IPC分类号： G01M11/02 , G01M11/00
摘要：【課題】簡便で再現性の良い多コア光ファイバのクロストーク特性の評価方法及びそのシステムを提供すること。【解決手段】光源1で発生した測定光を波長スクランブラ(PS)2及びSMF3を介して被測定多コア光ファイバ(FUT)10の一端の任意の1つのコアに単一モード動作状態で入射し、当該FUT10の他端からの出射光をSMF4を介してパワーメータ7で受光してその光強度を測定する際、FUT10の一端及び当該一端から所定の長さ離れた部位をそれぞれ固定した微動台5及び6の間隔を変化させることによりFUT10に張力を印加して測定光の位相状態を変化させ、測定光の位相変化に伴う時間領域における光強度分布を、PS2により測定光の偏光状態を変化させながら取得し、その光強度分布の標準偏差の3倍に相当する光強度偏差&Dgr;Pを用いてFUT10の平均電力結合係数hを導出する。【選択図】図1
摘要翻译：要解决的问题：提供一种容易且再现性好的多芯光纤的串扰特性的评价方法及其系统。解决方案：当由光源1产生的测量光以单模式入射时，在通过波长扰乱器（PS）2和SMF 3测量的多芯光纤（FUT）10的一端的一个任意的核心上的操作状态和来自FUT 10的另一端的出射光被功率计接收如图7所示，为了测量其光强度，测量光的相位状态通过向FUT10施加张力而改变，通过改变FUT10的一端的微动台5和6之间的间隔和区域距离一端预定距离是固定的，在测量光的相位变化的时间区域中获得光强度分布，同时测量光的偏振状态被改变通过使用对应于光强度分布的标准偏差的三倍的光强度偏差＆Dgr; P来导出PS 2和FUT 10的平均功率耦合系数“h”。

45. 发明专利

JP2013177269A Method for producing optical fiber preform 有权
标题翻译：生产光纤预制件的方法
公开(公告)号：JP2013177269A
公开(公告)日：2013-09-09
申请号：JP2012041811
申请日：2012-02-28
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： FUKAI CHISATO , NAKAJIMA KAZUHIDE
IPC分类号： C03B37/018
CPC分类号： C03B37/0142 , C03B2203/34
摘要： PROBLEM TO BE SOLVED: To provide a method for producing an optical fiber preform capable of obtaining easily an optical fiber preform capable of producing, with a small loss, a long multi-core optical fiber having a plurality of cores in an optical fiber cross section.SOLUTION: A plurality of cylindrical mandrels or quartz tubes or cylindrical porous preforms are arranged corresponding to each core part of an optical fiber preform, and glass particles are deposited on the mandrels/quartz tubes/porous preforms, based on a VAD method, OVD method, MCVD method, PCVD method, and combinations thereof.
摘要翻译：要解决的问题：提供一种能够容易地获得光纤预制棒的方法，该光纤预制棒能够以较小的损耗产生在光纤截面中具有多个芯的长的多芯光纤。解决方案：对应于光纤预制棒的每个芯部分布置多个圆柱形心轴或石英管或圆柱形多孔预成型件，并且基于VAD方法，OVD，将玻璃颗粒沉积在心轴/石英管/多孔预成型件上方法，MCVD方法，PCVD方法及其组合。

46. 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

47. 发明专利

JP2013050744A Alignment structure for optical fiber and optical connector using the same, and alignment method for optical fiber 有权
标题翻译：用于光纤和光纤连接器的对准结构以及光纤对准方法
公开(公告)号：JP2013050744A
公开(公告)日：2013-03-14
申请号：JP2012272479
申请日：2012-12-13
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： KOYAMA MAKOTO , NAKAJIMA KAZUHIDE , KURASHIMA TOSHIO
IPC分类号： G02B6/24 , G02B6/36
摘要： PROBLEM TO BE SOLVED: To provide an alignment structure for an optical fiber and an optical connector using the alignment structure that, without peeling off a coating in an optical fiber with the coating attached, enable execution of accurate alignment of the optical fiber, and to provide an alignment method for an optical fiber.SOLUTION: A coating 1b in optical fibers 1 inserted into an alignment part 17 is cut and torn off by each guide blade 17b, and a tip of each guide blade 17b is made to come into contact with a bare optical fiber 1a in the optical fibers 1. Thereby, since the bare optical fiber 1a is set to be positioned in the radial direction thereof, the optical fibers 1 with the coating attached can be accurately aligned with each other and, without peeling off the coating 1b in the optical fibers 1, can be inserted, as they are, into a connector body to be assembled. Then, each guide blade 17b provided movably in the radial direction of the optical fibers 1 is energized inward in the radial direction of the optical fibers 1.
摘要翻译：要解决的问题：为了提供一种用于光纤的对准结构和使用对准结构的光连接器，其在不剥离附着有涂层的光纤中的涂层的情况下，能够执行光纤的精确对准并且提供一种用于光纤的对准方法。解决方案：插入到对准部17中的光纤1中的涂层1b被每个引导刀片17b切割并撕开，并且使每个引导刀片17b的末端与裸光纤1a接触因此，由于裸光纤1a被设定为沿其径向定位，所以具有附着的涂层的光纤1可以彼此精确对准，并且不会在光学元件中剥离涂层1b 纤维1可以原样插入要组装的连接器主体中。然后，沿光纤1的径向可移动地设置的每个引导叶片17b在光纤1的径向方向被向内激励。版权所有：（C）2013，JPO＆INPIT

48. 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

49. 发明专利

JP2011154294A Connecting method of optical fiber and refractive index matching agent used for the same 有权
$Connecting method of optical fiber and refractive index matching agent used for the same$
标题翻译：光纤连接方法及其相应的折射率匹配剂
公开(公告)号：JP2011154294A
公开(公告)日：2011-08-11
申请号：JP2010016961
申请日：2010-01-28
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： SAITO KOTARO , NAKAJIMA KAZUHIDE
IPC分类号： G02B6/24 , G02B6/00 , G02B6/032
摘要： PROBLEM TO BE SOLVED: To achieve a mechanical splice connection having a favorable connection loss characteristics and a reflection attenuation characteristics for a hole structure fiber having an arbitrary cross-sectional structure. SOLUTION: In connecting a hole structure fiber having a plurality of holes 3 around a core 1 by means of mechanical splice by using a refractive index matching agent, the maximum penetration length Zmax of a refractive index matching agent 4 into holes 3 is controlled as a function of RΔ(=Δh/Δ), which is the ratio between a specific refractive index difference Δh of a refractive index of the refractive index matching agent 4 against the refractive index of pure quartz glass, and the ratio of a specific refractive index difference Δ of a refractive index of the core 1 against the refractive index of the pure quartz glass. Thereby, the increase of a mode coupling loss caused by penetration of the refractive index matching agent 4 into the holes 3 is suppressed. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了实现具有任意横截面结构的孔结构纤维具有良好的连接损耗特性和反射衰减特性的机械接头连接。解决方案：通过使用折射率匹配剂通过机械接合将具有多个孔3的孔结构纤维连接在芯1周围，折射率匹配剂4到孔3中的最大穿透长度Zmax为作为折射率匹配剂4的折射率的比折射率差Δh与纯石英玻璃的折射率之比的RΔ（=Δh/Δ）的函数，以及特定的芯1的折射率与纯石英玻璃的折射率的折射率差Δ。因此，抑制了由折射率匹配剂4穿入孔3而导致的模式耦合损耗的增加。版权所有（C）2011，JPO＆INPIT

50. 发明专利

JP2011039238A Alignment structure of optical fiber, optical connector using the same, and alignment method of optical fiber 有权
标题翻译：光纤的对准结构，使用该光纤的光连接器和光纤的对准方法
公开(公告)号：JP2011039238A
公开(公告)日：2011-02-24
申请号：JP2009185852
申请日：2009-08-10
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： KOYAMA MAKOTO , NAKAJIMA KAZUHIDE , KURASHIMA TOSHIO
IPC分类号： G02B6/38
摘要： PROBLEM TO BE SOLVED: To provide: an alignment structure of an optical fiber, which can accurately align the optical fiber without peeling off a clad optical fiber; an optical connector using the same; and an alignment method of an optical fiber.
SOLUTION: The clad 1b of the optical fiber 1, inserted into an alignment section 12, is cut by each guide blade 12b, and a bare fiber 1a is positioned in a diameter direction by contacting an edge section of each guide plate 12b to bare fiber 1a of the optical fiber 1. Thus, the optical fibers 1 are accurately aligned with each other with the clad as it is, and the optical fiber 1 can be inserted into a connector body 11 and assembled, as it is, without peeling off the clad 1b, and the optical fiber 1 is very easily treated on assembly.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供：光纤的对准结构，其可以在不剥离包层光纤的情况下精确地对准光纤; 使用该连接器的光连接器; 以及光纤的对准方法。解决方案：插入到对准部分12中的光纤1的包层1b被每个引导片12b切割，并且裸光纤1a通过接触每个引导板12b的边缘部分而沿直径方向定位光纤1的裸光纤1a。因此，光纤1以包层原样准确地对齐，并且光纤1可以插入连接器主体11中并且被组装成没有剥离包层1b，并且光纤1在组装时非常容易地处理。版权所有（C）2011，JPO＆INPIT

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