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101. 发明授权

US06805497B1 Optical transmission line 失效
标题翻译：光传输线
公开(公告)号：US06805497B1
公开(公告)日：2004-10-19
申请号：US09869698
申请日：2001-07-03
申请人： Shinji Ishikawa , Motonori Nakamura , Masao Tsukitani , Eisuke Sasaoka
发明人： Shinji Ishikawa , Motonori Nakamura , Masao Tsukitani , Eisuke Sasaoka
IPC分类号： G02B6255
CPC分类号： G02B6/03694 , G02B6/03627 , G02B6/2551 , G02B6/29376 , G02B6/29377
摘要： An optical transmission line including a portion formed by fusion-splicing optical fibers having structures different from each other; wherein, in the optical fibers having structures different from each other, a first optical fiber 1 has a mode field diameter smaller than that of a second optical fiber 2 fusion-spliced thereto; and wherein the first optical fiber 1 has an average viscosity from a center to an outermost layer greater than that of the second optical fiber from a center to an outermost layer.
摘要翻译：一种光传输线，包括通过熔接具有彼此不同结构的光纤而形成的部分; 其中，在具有彼此不同的结构的光纤中，第一光纤1的模场直径小于与其熔接的第二光纤2的模场直径; 并且其中第一光纤1具有从中心到最外层的从中心到最外层的平均粘度大于第二光纤的平均粘度。

102. 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 %.

103. 发明授权

US06577440B2 Optical fiber for optical amplifier and fiber optic amplifier 失效
公开(公告)号：US06577440B2
公开(公告)日：2003-06-10
申请号：US09842008
申请日：2001-04-26
申请人： Shinji Endo , Shinji Ishikawa , Motoki Kakui
发明人： Shinji Endo , Shinji Ishikawa , Motoki Kakui
IPC分类号： H01S300
CPC分类号： H01S3/06754 , H01S3/06708 , H01S3/0672 , H01S3/1601 , H01S3/1608 , H01S3/1655
摘要： An optical fiber for optical amplification used for 1.58 &mgr;m band signal light amplification, at least a core region thereof being doped with Er has a core region at least a part thereof made of silica glass co-doped with Ge and Al together with Er, and Er average atomic concentration in the core region is from 1000 wt-ppm to 3000 wt-ppm inclusive, and cutoff wavelength is from 1.3 &mgr;m to 1.5 &mgr;m inclusive.

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

US06490078B2 Optical fiber for optical amplifier, optical fiber amplifier and optical fiber laser 有权
标题翻译：光放大器光纤，光纤放大器和光纤激光器
公开(公告)号：US06490078B2
公开(公告)日：2002-12-03
申请号：US09809301
申请日：2001-03-16
申请人： Tadashi Enomoto , Masahiro Takagi , Yuichi Ohga , Motoki Kakui , Shinji Ishikawa , Masakazu Shigehara , Shinji Endo
发明人： Tadashi Enomoto , Masahiro Takagi , Yuichi Ohga , Motoki Kakui , Shinji Ishikawa , Masakazu Shigehara , Shinji Endo
IPC分类号： G02B634
CPC分类号： H01S3/06708 , H01S3/06716 , H01S3/06729 , H01S3/06754
摘要： The present invention relates to an OFA having a high signal gain, easily manufactured, having a high mechanical strength, having a small splice loss with respect to other optical fibers, and rarely encountering the occurrence of noise at a signal wavelength. The OFA according to the present invention has a function of amplifying signals propagating therethroug by pumping light supplied thereto, and comprises, at least, a core region, an inner cladding region provided on the periphery of the core region, an outer cladding region provided on the periphery of the inner cladding region, and one or more node coupling gratings. An element for signal amplification is added to at least the core region. The core region has a structure ensuring a core mode with respect to the signals, while the inner cladding region has a structure ensuring a multi-mode with respect to the pumping light. Each of the mode coupling gratings passes core mode signals therethrough, and induces a mode coupling between the inner cladding mode and the core mode with respect to the pumping light.
摘要翻译：本发明涉及具有高机械强度，易于制造的具有高信号增益，相对于其它光纤具有小的接合损耗，并且很少遇到在信号波长处的噪声的发生的OFA。根据本发明的OFA具有通过泵送供给到其上的光来传播传播的信号的功能，并且至少包括芯区域，设置在芯区域周围的内包层区域，设置在芯区域内包层区域的周边，以及一个或多个节点耦合光栅。用于信号放大的元件至少加到核心区域。芯区域具有确保相对于信号的芯模式的结构，而内包层区域具有确保相对于泵浦光的多模式的结构。每个模式耦合光栅通过芯模信号，并且相对于泵浦光在内包层模式和芯模之间引起模耦合。

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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