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101. 发明授权

US06661954B2 Optical transmission line including a connected part of optical fibers and connecting method 有权
标题翻译：光传输线包括光纤的连接部分和连接方法
公开(公告)号：US06661954B2
公开(公告)日：2003-12-09
申请号：US10061210
申请日：2002-02-04
申请人： Eisuke Sasaoka , Takemi Hasegawa , Shinji Ishikawa , Masashi Onishi
发明人： Eisuke Sasaoka , Takemi Hasegawa , Shinji Ishikawa , Masashi Onishi
IPC分类号： G02B642
CPC分类号： G02B6/02328 , G02B6/02333 , G02B6/02357 , G02B6/02361 , G02B6/02366 , G02B6/02385 , G02B6/262 , G02B6/3801
摘要： Provided are an optical transmission line including a connected part of the optical fibers having different refractive index profiles, wherein at least one of the optical fibers has a hollow region, and a method for connecting such optical fibers, wherein connection loss in a connection of such optical fibers is reduced. In the case of connecting an optical fiber 1, which does not have a hollow region and which consists of a core region 3 and a cladding region 4, and an optical fiber 2, which consists of a hollow core region 5 and a cladding region 6 having a plurality of refractive index variation parts 7 which extend along optical fiber 2, matching oil M is first injected into the connecting end portion of the hollow core region 5 to be connected with the optical fiber 1. The matching oil M is a substance that has a matched refractive index greater than the refractive index of the material which forms the cladding region 6. Subsequently, one end portion of the optical fiber 1 and the connecting end portion of the optical fiber 2, wherein the matching oil M is injected, are inserted into the glass pipe 8, and the optical fiber 1 and the optical fiber 2 are connected.
摘要翻译：提供一种光传输线，其包括具有不同折射率分布的光纤的连接部分，其中至少一个光纤具有中空区域，以及连接这种光纤的方法，其中连接这种光纤的连接损耗光纤减少。在连接不具有由芯区域3和包层区域4构成的中空区域的光纤1和由中空芯区域5和包层区域6构成的光纤2的情况下具有沿着光纤2延伸的多个折射率变化部7，首先将匹配油M注入到与光纤1连接的中空芯区域5的连接端部。匹配油M是具有大于形成包层区域6的材料的折射率的匹配折射率。随后，光纤1的一个端部和光纤2的连接端部（其中注入匹配油M）是插入玻璃管8中，并且光纤1和光纤2连接。

102. 发明授权

US06618532B1 Optical transmission line 有权
标题翻译：光传输线
公开(公告)号：US06618532B1
公开(公告)日：2003-09-09
申请号：US09628510
申请日：2000-11-27
申请人： Eisuke Sasaoka , Shigeru Tanaka , Masayuki Nishimura , Shinji Ishikawa , Takatoshi Kato
发明人： Eisuke Sasaoka , Shigeru Tanaka , Masayuki Nishimura , Shinji Ishikawa , Takatoshi Kato
IPC分类号： G02B602
CPC分类号： G02B6/02009 , C03B37/01205 , C03B37/027 , C03B2203/18 , C03B2203/36 , C03B2205/40 , C03B2205/47 , G02B6/02242 , G02B6/03627 , G02B6/03644 , G02B6/29377 , H04B10/25253
摘要： An optical transmission line having reduced flunctions in transmission quality is formed with a structure in which first and second waveguides whose transmission characteristics at a predetermined wavelength in a wavelength band in use are set opposite to each other and are arranged alternately. The chromatic dispersion of the first and second waveguides are set so as to have signs opposite to each other, and the dispersion slope of the first and second waveguides are set so as to have signs opposite to each other. Embodiments include setting the absolute value of chromatic dispersion in each first waveguide to 1 ps/nm/km or more but 10 ps/nm/km or less, and the absolute value of chromatic dispersion in each second waveguide is set to 1 ps/nm/km or more but 10 ps/nm/km or less.
摘要翻译：具有传输质量降低的光传输线路的形成是这样的结构，其中在使用中的波长带中的预定波长的传输特性彼此相对设置并交替布置的第一和第二波导。将第一和第二波导的色散设定为具有彼此相反的符号，并且将第一和第二波导的色散斜率设定为具有彼此相反的符号。实施例包括将每个第一波导中的色散的绝对值设置为1ps / nm / km或更大但10ps / nm / km或更小，并且将每个第二波导中的色散的绝对值设置为1ps / nm / km以上，10ps / nm / km以下。

103. 发明授权

US06597849B2 Optical fiber and optical component including the same 失效
公开(公告)号：US06597849B2
公开(公告)日：2003-07-22
申请号：US09940620
申请日：2001-08-29
申请人： Shinji Ishikawa , Toshikazu Shibata , Ken Hashimoto
发明人： Shinji Ishikawa , Toshikazu Shibata , Ken Hashimoto
IPC分类号： G02B602
CPC分类号： G02B6/03633 , C03C13/04 , G02B6/02057 , G02B6/29334
摘要： The present invention relates to an optical fiber having a sufficient strength, in which not only a core region but also a cladding region contains GeO2, and an optical component including the same. The optical fiber has an outer diameter D; and comprises a core region, a first cladding region surrounding the core region, and a second cladding region surrounding the first cladding region. The core region is a glass region mainly composed of a silica glass material with a GeO2 content of 1 wt % or more. The first cladding region is a glass region, mainly composed of a silica glass material with a GeO2 content of 1 wt % or more, having an outer diameter of 0.80D or more but 0.98D or less. The second cladding region is a glass region mainly composed of a silica glass material with a GeO2 content of less than 0.2 wt %.

104. 发明授权

US06563984B1 Long-period grating device 有权
标题翻译：长周期光栅装置
公开(公告)号：US06563984B1
公开(公告)日：2003-05-13
申请号：US09504898
申请日：2000-02-16
申请人： Michiko Harumoto , Masakazu Shigehara , Shinji Ishikawa , Tadashi Enomoto
发明人： Michiko Harumoto , Masakazu Shigehara , Shinji Ishikawa , Tadashi Enomoto
IPC分类号： G02B626
CPC分类号： G02B6/02095
摘要： The present invention relates to a long-period grating device which eliminates only a desirable wavelength of core-mode light in a wavelength band in use from 1525 nm to 1610 nm. The long-period grating device according to the present invention comprises an optical fiber provided with a core region and a cladding region, whereas a long-period grating whose refractive index changes with a period &Lgr; in the advancing direction of light is provided in the core region, wherein the period &Lgr; is set such that the absolute value of a loss peak due to mode coupling concerning a refractive index modulation component with a period &Lgr;/(2n+1) (n=1, 2, 3, 4) is 0.2 dB or less in the wavelength band in use.
摘要翻译：本发明涉及一种长周期光栅器件，其仅消除了使用中的1525nm至1610nm的波长范围内的核心光的理想波长。根据本发明的长周期光栅装置包括设置有芯区域和包层区域的光纤，而在光的前进方向上折射率随周期LAMBD变化的长周期光栅设置在芯区域，其中周期LAMBD被设置为使得由于与周期LAMBD /（2n + 1）（n = 1,2,3,4）的折射率调制分量的模式耦合的损耗峰值的绝对值为0.2 dB或更小的波长带。

105. 发明授权

US06504962B2 Method for determining an aging condition for an optical waveguide grating and temperature sensor 失效
标题翻译：用于确定光波导光栅和温度传感器的老化条件的方法
公开(公告)号：US06504962B2
公开(公告)日：2003-01-07
申请号：US09909897
申请日：2001-07-23
申请人： Shinji Ishikawa , Toru Iwashima , Michiko Harumoto , Akira Inoue , Masakazu Shigehara
发明人： Shinji Ishikawa , Toru Iwashima , Michiko Harumoto , Akira Inoue , Masakazu Shigehara
IPC分类号： G02B634
CPC分类号： G02B6/02185
摘要： The present invention provides a method for determining a condition of aging for an optical waveguide grating. In this method, the aged deterioration,curve of the optical waveguide grating is set as a forms of C·t−&agr;, t represents time, and &agr; and C represent parameters. Then, the condition of the aging is determined based on the aged deterioration curve.
摘要翻译：本发明提供了一种用于确定光波导光栅的老化状况的方法。在这种方法中，光波导光栅的老化变形曲线被设置为C.t-α，t表示时间的形式，α和C表示参数。然后，根据老化退化曲线确定老化条件。

106. 发明授权

US06501892B1 Dispersion-compensating fiber 有权
标题翻译：色散补偿光纤
公开(公告)号：US06501892B1
公开(公告)日：2002-12-31
申请号：US09580971
申请日：2000-05-30
申请人： Toshiaki Okuno , Shinji Ishikawa , Tomonori Kashiwada
发明人： Toshiaki Okuno , Shinji Ishikawa , Tomonori Kashiwada
IPC分类号： G02B602
CPC分类号： G02B6/02242 , G02B6/02261 , G02B6/03627 , G02B6/03644 , G02B6/29377 , H04B10/2525
摘要： The dispersion-compensating fiber according to the present invention is an optical fiber having a structure which, when constituting an optical transmission line together with a dispersion-shifted fiber, whose zero-dispersion wavelength is in a 1.5-&mgr;m wavelength band, for guiding light signals in the 1.5-&mgr;m wavelength band or 1.6-&mgr;m wavelength band, is capable of improving transmission characteristics of the whole optical transmission line and allowing the dispersion to be compensated for efficiently and the size thereof to become smaller; and has a structure for improving the total dispersion slope of the optical transmission line while in a state fully compensating for the dispersion of the dispersion-shifted fiber. This dispersion-compensating fiber has a triple cladding structure having a first cladding, a second cladding, and a third cladding which are successively provided on the outer periphery of a core; and, in a state where the relative refractive index differences in the regions and outside diameters thereof are optimized so as to compensate for the dispersion-shifted fiber, realizes an optical transmission system having a favorable total dispersion slope.
摘要翻译：根据本发明的色散补偿光纤是具有这样的结构的光纤，该光纤在与零色散波长为1.5μm波段的色散位移光纤一起构成光传输线时，用于引导光在1.5μm波长带或1.6μm波长带的信号能够改善整个光传输线的传输特性，并且可以有效地补偿色散并使其尺寸变小; 并且具有在完全补偿色散位移光纤的色散的状态下改善光传输线的总色散斜率的结构。该色散补偿光纤具有三层包层结构，其具有连续设置在芯的外周上的第一包层，第二包层和第三包层; 并且在其区域和外径的相对折射率差被优化以补偿色散位移光纤的状态下，实现具有良好的总色散斜率的光传输系统。

107. 发明授权

US06400878B1 Optical fiber and method of making the same 有权
标题翻译：光纤及其制作方法
公开(公告)号：US06400878B1
公开(公告)日：2002-06-04
申请号：US09939742
申请日：2001-08-28
申请人： Katsuya Nagayama , Yuichi Ohga , Tatsuhiko Saitoh , Shinji Ishikawa , Ichiro Tsuchiya , Takenori Uchiyama
发明人： Katsuya Nagayama , Yuichi Ohga , Tatsuhiko Saitoh , Shinji Ishikawa , Ichiro Tsuchiya , Takenori Uchiyama
IPC分类号： G02B602
CPC分类号： G02B6/03627 , C03B37/02718 , C03B37/029 , C03B37/15 , C03B2201/12 , C03B2201/20 , C03B2201/31 , C03B2203/22 , C03B2205/56 , C03C13/04 , G02B6/02
摘要： An optical fiber preform 2 having a viscosity ratio R&eegr;=&eegr;0/&eegr;t of 2.5 or less between the core average viscosity &eegr;0 and the total average viscosity &eegr;t is prepared, and is drawn by a drawing furnace 11 so as to yield an optical fiber 3, which is then heated to a temperature within a predetermined range so as to be annealed by a heating furnace 21 disposed downstream the drawing furnace 11. Here, upon annealing in the heating furnace 21, the fictive temperature Tf within the optical fiber lowers, thereby reducing the Rayleigh scattering loss. At the same time, the viscosity ratio condition of R&eegr;≦2.5 restrains the stress from being concentrated into the core, thereby lowering the occurrence of structural asymmetry loss and the like. Hence, an optical fiber which can reduce the transmission loss caused by the Rayleigh scattering loss and the like as a whole, and a method of making the same can be obtained.
摘要翻译：准备在芯平均粘度eta0与总平均粘度etat之间具有2.5或更小的粘度比Reta = eta0 / etat的光纤预制棒2，并由拉丝炉11拉伸以产生光纤3，然后将其加热到预定范围内的温度，以便通过设置在拉丝炉11下游的加热炉21进行退火。这里，在加热炉21中退火后，光纤内的假想温度Tf降低，从而降低瑞利散射损失。同时，Reta <= 2.5的粘度比条件限制了应力集中到芯中，从而降低了结构不对称损失的发生等。因此，可以获得可以降低由瑞利散射损耗等引起的传输损耗等的整体的光纤及其制造方法。

108. 发明授权

US06137931A Method for determining a condition of aging for optical fiber grating 失效
标题翻译：确定光纤光栅老化状态的方法
公开(公告)号：US06137931A
公开(公告)日：2000-10-24
申请号：US70799
申请日：1998-05-01
申请人： Shinji Ishikawa , Toru Iwashima , Michiko Harumoto , Akira Inoue
发明人： Shinji Ishikawa , Toru Iwashima , Michiko Harumoto , Akira Inoue
IPC分类号： G02B6/34
CPC分类号： G02B6/02185
摘要： The present invention provides a method for determining a condition of aging for an optical fiber grating. This method comprises a step of setting the aged deterioration curve of the optical fiber grating as a form proportional to t.sup.-n, where t represents time, and n represents a parameter dependent on temperature; and a step of determining the condition of the aging according to the aged deterioration curve.
摘要翻译：本发明提供一种用于确定光纤光栅老化状况的方法。该方法包括将光纤光栅的老化劣化曲线设置为与t-n成比例的形式，其中t表示时间，n表示取决于温度的参数的步骤; 以及根据老化劣化曲线确定老化条件的步骤。

109. 发明授权

US5732178A Single-mode optical fiber 失效
标题翻译：单模光纤
公开(公告)号：US5732178A
公开(公告)日：1998-03-24
申请号：US756484
申请日：1996-11-26
申请人： Yoshiaki Terasawa , Shinji Ishikawa , Takatoshi Kato
发明人： Yoshiaki Terasawa , Shinji Ishikawa , Takatoshi Kato
IPC分类号： G02B6/02 , G02B6/036
CPC分类号： G02B6/02009 , G02B6/02042 , G02B6/03633 , G02B6/02276
摘要： This invention relates to a dispersion-shifted fiber containing silica glass as the major component and in which the zero-dispersion wavelength is set to fall within a range of 1,560 nm to 1,580 nm and the mode field diameter with respect to light having a predetermined wavelength is set to 8 .mu.or more. This dispersion-shifted fiber is a single-mode optical fiber capable of decreasing the influence of nonlinear optical effect and having a structure for suppressing an increase in bending loss of the optical fiber, and includes a core region constituted by the first core portion and the second core portion, and a cladding portion. In particular, an outer diameter a of the first core portion and an outer diameter b of the second core portion satisfy at least a relationship 0.10.ltoreq.a/b .ltoreq.0.29.
摘要翻译：本发明涉及一种含有二氧化硅玻璃作为主要成分的色散位移光纤，其中零色散波长设定在1560nm至1,580nm的范围内，相对于具有预定波长的光的模场直径设定为8亩以上。该色散位移光纤是能够降低非线性光学效果的影响并具有抑制光纤的弯曲损耗增加的结构的单模光纤，并且包括由第一芯部和第二芯部分和包层部分。特别地，第一芯部的外径a和第二芯部的外径b至少满足0.10≤a/b≤0.29的关系。

110. 发明授权

US5597398A Process for producing glass preform for optical fiber 失效
标题翻译：光纤用玻璃预制棒的制造方法
公开(公告)号：US5597398A
公开(公告)日：1997-01-28
申请号：US260747
申请日：1994-06-15
申请人： Shinji Ishikawa , Yoshiki Chigusa , Motonori Nakamura , Yoshinori Makio , Morio Watanabe
发明人： Shinji Ishikawa , Yoshiki Chigusa , Motonori Nakamura , Yoshinori Makio , Morio Watanabe
IPC分类号： C03B37/014 , C03B37/018
CPC分类号： C03B37/0148 , Y02P40/57
摘要： A process for producing a porous glass preform for optical fiber by depositing fine glass particles on an outer surface of a glass material while moving the glass material, including the steps of: preheating a portion of the glass material for not less than 5 minutes to clean the portion of the glass material in an apparatus for depositing fine glass particles; and depositing fine glass particles on the portion of the glass material cleaned by the preheating, in the apparatus for depositing fine glass particles.
摘要翻译：一种通过在移动玻璃材料的同时在玻璃材料的外表面上沉积微细玻璃颗粒而制造光纤用多孔玻璃预制件的方法，包括以下步骤：将玻璃材料的一部分预热至少5分钟以进行清洁用于沉积细微玻璃颗粒的装置中的玻璃材料部分; 以及在用于沉积微细玻璃颗粒的装置中，通过预热清洁的玻璃材料的部分上沉积微细玻璃颗粒。

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