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71. 发明专利

JP2006133277A Quality assurance method for optical fiber, optical fiber, and optical cable 审中-公开
标题翻译：光纤，光纤和光缆的质量保证方法
公开(公告)号：JP2006133277A
公开(公告)日：2006-05-25
申请号：JP2004319065
申请日：2004-11-02
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： TANIGAWA SHOJI , GOTO RYUICHIRO , MATSUO SHOICHIRO , HIMENO KUNIHARU
IPC分类号： G02B6/02 , G01M11/02
摘要： PROBLEM TO BE SOLVED: To provide a new quality assurance method for preventing deterioration in the transmission quality in a single optical fiber caused by dispersion of a polarization mode, and to provide an optical fiber assured by the above assurance method.
SOLUTION: The quality assurance method for an optical fiber is characterized in that: the birefringence of an optical fiber before processed into a cable is measured; and only an optical fiber showing a measurement value lower than a preliminarily determined reference value is selected to suppress the probability of inducing deterioration in the transmission quality caused by dispersion of a polarization mode in a transmission line after the fiber is processed into a cable.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种新的质量保证方法，用于防止由偏振模式的分散引起的单个光纤中的传输质量的劣化，并提供通过上述保证方法保证的光纤。解决方案：光纤的质量保证方法的特征在于：测量在加工成电缆之前的光纤的双折射; 并且仅选择显示低于预先确定的参考值的测量值的光纤，以抑制在光纤被处理成电缆之后在传输线中偏振模式的偏离引起的传输质量恶化的概率。版权所有（C）2006，JPO＆NCIPI

72. 发明专利

JP2006119678A Dispersion-shifted optical fiber 有权
标题翻译：分散透镜光纤
公开(公告)号：JP2006119678A
公开(公告)日：2006-05-11
申请号：JP2006021135
申请日：2006-01-30
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： MATSUO SHOICHIRO , TANIGAWA SHOJI
IPC分类号： G02B6/02 , G02B6/036
摘要： PROBLEM TO BE SOLVED: To provide a high-performance dispersion-shifted optical fiber that is more suitable for a long distance system or a multi-wavelength transmission incidental to a large capacity of the latest optical communication system and to a demand for long distance transmission. SOLUTION: The dispersion-shifted optical fiber has a refractive index profile composed of a center core, a step core and a clad, with a small diameter solution employed as a core diameter. Assuming that r1 is the radius of the center core, r2 is the radius of the step core, Δ1 is the relative refractive index difference of the center core with the refractive index of the clad as a reference, Δ2 is the relative refractive index difference of the step core, x is r2/r1 and y is Δ2/Δ1; 5.0≤x≤7.5, 0.14≤y≤0.18 and 0.8%≤Δ1≤1.2%. In addition, Aeff is 65-95 μm 2 , dispersion slope is 0.08-0.14 ps/km/nm 2 , bending loss is ≤100 dB/m, and the absolute value of wavelength dispersion value is 0.5-8.0 ps/km/nm. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了提供更适合于最近光通信系统的大容量的长距离系统或多波长传输的高性能色散位移光纤，以及对长距离传输。解决方案：色散位移光纤具有由中心芯，台阶芯和包层组成的折射率分布，其中使用小直径溶液作为芯直径。假设r1是中心芯的半径，r2是台阶芯的半径，Δ1是中心芯与折射率作为参考的相对折射率差，Δ2是相对折射率差阶梯芯，x是r2 / r1，y是Δ2/Δ1; 5.0≤x≤7.5，0.14≤y≤0.18，0.8％≤Δ1≤1.2％。此外，Aeff为65-95μm 2 ，色散斜率为0.08-0.14ps / km / nm 2 ，弯曲损耗≤100dB/ m，绝对值波长色散值的值为0.5-8.0ps / km / nm。版权所有（C）2006，JPO＆NCIPI

73. 发明专利

JP2003232950A OPTICAL FIBER 审中-公开
公开(公告)号：JP2003232950A
公开(公告)日：2003-08-22
申请号：JP2002035657
申请日：2002-02-13
申请人： FUJIKURA LTD
发明人： MATSUO SHOICHIRO , HIMENO KUNIHARU , HARADA KOICHI
IPC分类号： G02B6/036 , G02B6/22
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber having an expanded effective cross sectional area, a suppressed dispersion slope and low loss multi-ring type refractive index profile. SOLUTION: This optical fiber having a ring type refractive index profile is manufactured to have a transmission loss not larger than 0.210 dB/km, the effective cross sectional area A eff not less than 90 μm 2 , and the dispersion slope not less than 0.05 ps/nm 2 /km and not larger than 0.08 ps/nm 2 /km, by setting a dispersion value at a wave length of 1,550 nm not less than +6 ps/nm/ km and not more than +15 ps/nm/km. COPYRIGHT: (C)2003,JPO

74. 发明专利

JP2003185869A OPTICAL FIBER 审中-公开
公开(公告)号：JP2003185869A
公开(公告)日：2003-07-03
申请号：JP2001383709
申请日：2001-12-17
申请人： FUJIKURA LTD
发明人： TANIGAWA SHOJI , MATSUO SHOICHIRO , AZEBIRU TOMIO , HIMENO KUNIHARU , HARADA KOICHI
IPC分类号： G02B6/02 , C03B37/018 , C03C13/04 , G02B6/00 , G02B6/036 , G02B6/16 , G02B6/22
摘要： PROBLEM TO BE SOLVED: To obtain an optical fiber excellent in both of hydrogen resistance characteristics and transmission characteristics. SOLUTION: When a clad 2 comprises a region as an inner clad 2a where light passes and the rest region as an outer clad 2b, at least both of the core 1 and the inner clad 2a are doped with fluorine to control the irreversible increase of the loss in a 1,550 nm band caused by intrusion of hydrogen to ≤0.01 dB/km. The optical fiber is obtained, for example, by doping the optical fiber with fluorine in such a manner that the average effective concentration of fluorine defined as the weighted average by the intensity of the transmitted light is controlled to 0.08 to 2.5%. Further, by doping the almost all region where light passes with fluorine by ≥0.03 wt.%, the obtained optical fiber has more improved hydrogen resistance characteristics. COPYRIGHT: (C)2003,JPO

75. 发明专利

JP2003167145A STRUCTURE AND METHOD OF SPLICING OPTICAL FIBER 审中-公开
公开(公告)号：JP2003167145A
公开(公告)日：2003-06-13
申请号：JP2001365174
申请日：2001-11-29
申请人： FUJIKURA LTD
发明人： TAKENAGA KATSUHIRO , MATSUO SHOICHIRO , HIMENO KUNIHARU , HARADA KOICHI
IPC分类号： G02B6/255 , G02B6/02 , G02B6/032 , G02B6/036 , G02B6/10 , G02B6/22 , G02B6/20
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber splicing structure and method that can enhance splicing accuracy between cores in the fusion splicing of optical fibers and that can greatly reduce connection loss in the connection part of the optical fibers. SOLUTION: The optical fiber 21 having cavities is equipped with a core 2 and a clad 3 surrounding the core 2. In the clad 3, there are formed cavities 23 at each of the six positions rotationally symmetric with respect to the axial center of the core 2. The end of the clad 3 is fused and solidified while the end of the circular openings 23 are crushed and sealed. COPYRIGHT: (C)2003,JPO

76. 发明专利

JP2003112940A MANUFACTURING METHOD FOR OPTICAL FIBER AND OPTICAL FIBER 审中-公开
公开(公告)号：JP2003112940A
公开(公告)日：2003-04-18
申请号：JP2001306689
申请日：2001-10-02
申请人： FUJIKURA LTD
发明人： HANIYU SHINJI , MATSUO SHOICHIRO , HIMENO KUNIHARU , HARADA KOICHI
IPC分类号： G02B6/00 , C03B37/014 , C03B37/018 , G02B6/036 , G02B6/22
摘要： PROBLEM TO BE SOLVED: To provide a manufacturing method for optical fiber which is capable of obtaining the optimum solution of refractive index distribution profile easily and reliably. SOLUTION: Optical fiber is manufactured by setting respective structure parameters in such a manner that a structure parameter in one arbitrary layer and a structure parameter in other layer have a specified relation among the plural layers which are different in refractive index to one another and a structure parameter in one arbitrary layer and other structure parameter in the same layer have a specified relation. Concretely, the product of a layer thickness and relative refractive index difference of a layer is made to be a value in the fixed range, for example, the product of the layer thickness (r3 -r2 )/r2 of the second region 3 between radial positions r2 and r3 and the relative refractive index difference Δ3 of the second region 3 is made to be within a fixed range, either one of the layer thickness and relative refractive index difference is made constant, another one is made variable in a wide range and, thereby, the optimum refractive index profile can be reliably found out.

77. 发明专利

JP2002341157A WAVELENGTH MULTIPLEX TRANSMISSION LINE AND DISPERSION COMPENSATING OPTICAL FIBER USED FOR THE SAME 审中-公开
公开(公告)号：JP2002341157A
公开(公告)日：2002-11-27
申请号：JP2002003890
申请日：2002-01-10
申请人： FUJIKURA LTD
发明人： SAITO MANABU , AIKAWA KAZUHIKO , MATSUO SHOICHIRO
IPC分类号： G02B6/02 , G02B6/036 , H04B10/2507 , H04B10/2513 , H04B10/2563 , H04J14/00 , H04J14/02 , G02B6/10 , G02B6/22 , H04B10/02 , H04B10/18
摘要： PROBLEM TO BE SOLVED: To construct a wavelength multiplex transmission line which can select an arbitrary use waveband from the waveband as wide as possible among S-Band, C-Band, and L-Band. SOLUTION: The wavelength multiplex transmission line has a dispersion shift optical fiber 1 having positive wavelength dispersion in all the ranges of wavelengths of 1,460-1,630 nm, and a dispersion compensation transmission channel 5 provided with one kind of dispersion compensation optical fibers 2b, 3b and 4b having negative wavelength dispersion or two or more kinds of the dispersion compensation optical fibers 2b, 3b and 4b having different wavelength dispersions, in the compensation waveband selected from the wavelength of 1,460-1,630 nm. In the use waveband of the wavelength multiplex transmission line selected from the wavelength of 1,460-1,630 nm, the wavelength dispersion of the whole wavelength multiplex transmission line is adjusted so that it becomes -1.0 to 1.0 ps/nm/km.

78. 发明专利

JP2001116947A OPTICAL FIBER AND OPTICAL TRANSMISSION SYSTEM 失效
公开(公告)号：JP2001116947A
公开(公告)日：2001-04-27
申请号：JP2000012259
申请日：2000-01-20
申请人： FUJIKURA LTD
发明人： AIKAWA KAZUHIKO , SUZUKI TAKASHI , WADA AKIRA , YAMAUCHI RYOZO , SUZUKI TAKAAKI , MATSUO SHOICHIRO , SAITO MANABU
IPC分类号： G02B6/036 , G02B6/34 , G02B6/22
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber that enables Aeff to be expanded, in the band of wavelength in use selectable from 1.53-1.61 μm, that has a comparatively simple shape of distribution of refractive index, and that can be manufactured at low cost. SOLUTION: The structural characteristics of the optical fiber are such that it is equipped with a center core 1, an intermediate part 2 which is provided on the outer circumference of the center core 1 and which has a refractive index lower than that of the center core 1, and a clad 4 which is provided on the circumference of the intermediate part 2 and which has a refractive index higher than that of the intermediate part 2 and lower than that of the center core 1; that the effective core cross-section is 120 μm2 or more in the band of wavelength in use selectable from 1.53-1.61 μm; and that, in such band of wavelength in use, a cut-off wavelength is provided capable essentially of single mode propagation.

79. 发明专利

JP2001100056A DISPERSION SHIFT OPTICAL FIBER 失效
公开(公告)号：JP2001100056A
公开(公告)日：2001-04-13
申请号：JP2000224491
申请日：2000-07-25
申请人： FUJIKURA LTD
发明人： MATSUO SHOICHIRO , TANIGAWA SHOJI
IPC分类号： G02B6/036 , G02B6/22
摘要： PROBLEM TO BE SOLVED: To provide a dispersion shift optical fiber which meets the conditions that the optical fiber has a substantially single mode and bending loss of

80. 发明专利

JP2001051147A DISPERSIVE SHIFT OPTICAL FIBER 失效
公开(公告)号：JP2001051147A
公开(公告)日：2001-02-23
申请号：JP23013799
申请日：1999-08-16
申请人： FUJIKURA LTD
发明人： MATSUO SHOICHIRO , TANIGAWA SHOJI
IPC分类号： G02B6/028 , G02B6/036 , G02B6/18 , G02B6/22
摘要： PROBLEM TO BE SOLVED: To provide a high performance dispersive shift optical fiber suitable for a long-distance system or wavelength multiple transmission according to the recent demand for the larger capacity or longer-distance transmission of optical communication system. SOLUTION: This optical fiber has a dual shape core type refractive index distribution shape and adapts a small diameter solution as core diameter. This optical fiber has an Aeff of 65-95 μm2, in a using wavelength band selected from 1490-1610 nm, a dispersion slope of 0.08-0.14 ps/km/nm2, a bending loss

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