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公开(公告)号：US06501892B1
公开(公告)日：2002-12-31
申请号：US09580971
申请日：2000-05-30
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。
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公开(公告)号：US5640269A
公开(公告)日：1997-06-17
申请号：US622149
申请日：1996-03-27
IPC分类号： G02B6/00 , G02B6/02 , H01S3/06 , H01S3/067 , H01S3/094 , H01S3/0941 , H01S3/10 , H01S3/16 , H01S3/17 , H04J14/02 , H01S3/00
CPC分类号： H04B10/2912 , H01S3/06754 , H04B10/291 , H04B10/2935 , H04B10/294 , H04J14/0221 , H01S2301/04 , H01S3/1608 , H04B2210/003
摘要： An optical fiber amplifier comprises a composite optical fiber for receiving signal light and excitation light, amplifying the signal light and emitting the amplified signal light, comprising at least two kinds of optical fibers serially coupled each having a glass composition selected from at least two kinds of rare-earth-doped glass compositions, and excitation means for generating excitation light and supplying it to the composite optical fiber. Then, an optical fiber amplifier which reduces the wavelength dependency of gain in various wavelength ranges in wavelength division multiplexing transmission or in optical analog transmission, and which maintains an energy efficiency for amplification, an optical fiber amplifier which makes a wavelength at a gain peak to a predetermined one in accordance with intensities of various input lights, and an optical amplifier repeater comprising this optical fiber amplifier are provided.
摘要翻译： 光纤放大器包括用于接收信号光和激发光的复合光纤，放大信号光并发射放大的信号光，包括至少两种串联耦合的光纤，每个光纤具有选自以下的至少两种 稀土掺杂的玻璃组合物，以及用于产生激发光并将其提供给复合光纤的激励装置。 然后，在波分多路复用传输或光模拟传输中降低各种波长范围的增益的波长依赖性并且保持放大的能量效率的光纤放大器使波长为增益峰值的光纤放大器 提供根据各种输入光的强度的预定值，以及包括该光纤放大器的光放大器中继器。
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3.发明授权
公开(公告)号：US5430822A
公开(公告)日：1995-07-04
申请号：US127338
申请日：1993-09-28
IPC分类号： G02B6/00 , G02B6/02 , G02B6/34 , H04B10/25 , H04B10/2507 , H04B10/2525 , G02B6/26
CPC分类号： G02B6/29377 , H04B10/2525 , G02B6/29376 , H04B2210/252
摘要： An optical communication system that compensate for the dispersion of an optical fiber serving as a transmission path is provided. In its simplest form a dispersion compensating fiber having a sufficient length to compensate for the chromatic dispersion of the optical fiber is divided into portions, each portion having a length selected so as to maintain a linear characteristic of a relative intensity noise of the dispersion compensating fiber, and the divided portions of the dispersion compensating fiber are inserted in the path of the optical fiber while they are optically separated.
摘要翻译： 提供补偿作为传输路径的光纤的色散的光通信系统。 在其最简单的形式中，具有足够长度以补偿光纤的色散的色散补偿光纤被分成部分，每个部分具有选择的长度，以便保持色散补偿光纤的相对强度噪声的线性特性 并且色散补偿光纤的分割部分在光学分离的同时插入光纤的路径中。
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4.再颁专利Dispersion compensating fiber and optical transmission system including the same 有权色散补偿光纤和光传输系统包括它们公开(公告)号：USRE38086E1
公开(公告)日：2003-04-22
申请号：US09714615
申请日：2000-11-17
IPC分类号： G02B616
CPC分类号： G02B6/02261 , C03B37/014 , C03B2203/22 , C03B2203/36 , G02B6/02004 , G02B6/0228 , G02B6/02285 , G02B6/0281 , G02B6/0283 , G02B6/0286 , G02B6/03611 , G02B6/03627 , G02B6/03644 , G02B6/29377 , H01S3/06729 , H01S3/302
摘要： The present invention relates to a dispersion compensating fiber for improving a transmission system with it in total chromatic dispersion and dispersion slope in the 1.55 &mgr;m wavelength band. The dispersion compensating fiber according to the present invention is characterized by having the following characteristics for light in the 1.55 &mgr;m wavelength band: chromatic dispersion not less than −40 ps/km/nm and not more than 0 ps/km/nm; dispersion slope not less than −0.5 ps/km/nm2 and not more than −0.1 ps/km/nm2; transmission loss not more than 0.5 dB/km; polarization mode dispersion not more than 0.7 ps.km−½; mode field diameter not less than 4.5 &mgr;m and not more than 6.5 &mgr;m; cut-off wavelength not less than 0.7 &mgr;m and not more than 1.7 &mgr;m in the length of 2 m; and bending loss at the diameter of 20 mm, not more than 100 dB/m. The dispersion compensating fiber is optically connected with a dispersion shifted fiber as a compensated object at a ratio of appropriate lengths, which can improve the system including the dispersion compensating fiber in the total chromatic dispersion and dispersion slope of the system in the 1.55 &mgr;m band.
摘要翻译： 本发明涉及一种用于改善传输系统的色散补偿光纤在1.55μm波长带中的总色散和色散斜率。 根据本发明的色散补偿光纤的特征在于对于1.55μm波长带中的光具有以下特性：色散不小于-40ps / km / nm且不大于0ps / km / nm; 色散斜率不小于-0.5 ps / km / nm2，不大于-0.1 ps / km / nm2; 传输损耗不超过0.5 dB / km; 偏振模色散不大于0.7 ps.km-½; 模场直径不小于4.5μm，不大于6.5μm; 截止波长不小于0.7μm和不大于1.7μm，长度为2μm; 弯曲损耗为20mm，不大于100dB / m。 色散补偿光纤以适当长度的比率与作为补偿对象的色散位移光纤光学连接，这可以改善包括色散补偿光纤在1.55mum带中的系统的总色散和色散斜率的系统。
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公开(公告)号：US06347174B1
公开(公告)日：2002-02-12
申请号：US09297173
申请日：1999-07-06
IPC分类号： H04N591
CPC分类号： G02B6/03644 , G02B6/02028 , G02B6/02242 , G02B6/02276 , G02B6/0228 , G02B6/03627 , G02B6/03655 , G02B6/105 , G02F1/383
摘要： The present invention relates to a nonlinear optical fiber which can generate a nonlinear optical phenomenon with high efficiency, an optical fiber coil wound with the nonlinear optical fiber, and a wavelength converter equipped with the nonlinear optical fiber. In particular, the nonlinear optical fiber according to the present invention has, as characteristics with respect to input light having a predetermined wavelength, a mode field diameter of 5 &mgr;m or less, a polarization mode dispersion of 1 ps/km½ or less or a fixed plane of polarization, a zero-dispersion wavelength of not less than 1.5 &mgr;m but not greater than 1.6 &mgr;m, a cutoff wavelength of not less than 1.4 &mgr;m but not greater than 1.7 &mgr;m at a length of 2 m, a transmission loss of 3 dB/km or less, and a nonlinear coefficient of 10/W/km or more. As a result of this configuration, the nonlinear optical fiber generates, with high efficiency, desirable converted light occurring upon the nonlinear phenomenon.
摘要翻译： 本发明涉及一种能够高效率地产生非线性光学现象的非线性光纤，与非线性光纤缠绕的光纤线圈以及配备非线性光纤的波长转换器。 特别地，根据本发明的非线性光纤作为具有预定波长的输入光的特性，模场直径为5um以下，偏振模色散为1ps / km 1/2以下或固定 偏振平面，零分散波长不小于1.5μm但不大于1.6μm，截止波长不小于1.4μm，但不大于1.7μm，长度为2μm，传输损耗为3dB / km以下，非线性系数为10 / W / km以上。 作为该结构的结果，非线性光纤以非线性现象产生期望的转换光，高效率地产生。
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公开(公告)号：US06729777B2
公开(公告)日：2004-05-04
申请号：US10026445
申请日：2001-12-27
IPC分类号： G02B6255
CPC分类号： G02B6/2551 , G02B6/02242 , G02B6/02261 , G02B6/03644
摘要： A method of splicing optical fibers is provided to reduce the splicing loss of the first and second optical fibers having different MFDs from each other. In a pre-fusion heating step, the MFD at the adjacent end face of the optical fiber having larger MFD is enlarged by heating a portion including the adjacent end face thereof so as to diffuse a dopant. After the pre-fusion heating step, fusion-splicing of the first and the second optical fibers is performed. Thereafter, during the post-fusion heating step, the dopant is diffused by heating a portion including the fusion-spliced part between the first and the second optical fibers.
摘要翻译： 提供了一种拼接光纤的方法，以减少具有不同MFD的第一和第二光纤的拼接损耗。 在预融合加热步骤中，通过加热包含其相邻端面的部分以扩散掺杂剂，使具有较大MFD的光纤的相邻端面处的MFD扩大。 在预融合加热步骤之后，进行第一和第二光纤的熔接。 此后，在熔融后加热步骤期间，通过加热包括第一和第二光纤之间的熔接部分的部分来扩散掺杂剂。
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7.发明授权Dispersion compensating fiber and optical transmission system including the same 失效色散补偿光纤和光传输系统包括它们
公开(公告)号：US5838867A
公开(公告)日：1998-11-17
申请号：US834305
申请日：1997-04-15
IPC分类号： C03B37/014 , G02B6/34 , H01S3/067 , H01S3/30 , G02B6/16
CPC分类号： G02B6/02261 , C03B37/014 , G02B6/02004 , G02B6/0228 , G02B6/02285 , G02B6/03611 , G02B6/03627 , G02B6/03644 , G02B6/29377 , C03B2203/22 , C03B2203/36 , G02B6/0281 , G02B6/0283 , G02B6/0286 , H01S3/06729 , H01S3/302
摘要： The present invention relates to a dispersion compensating fiber for improving a transmission system with it in total chromatic dispersion and dispersion slope in the 1.55 .mu.m wavelength band. The dispersion compensating fiber according to the present invention is characterized by having the following characteristics for light in the 1.55 .mu.m wavelength band: chromatic dispersion not less than -40 ps/km/nm and not more than 0 ps/km/nm; dispersion slope not less than -0.5 ps/km/nm.sup.2 and not more than -0.1 ps/km/nm.sup.2 ; transmission loss not more than 0.5 dB/km; polarization mode dispersion not more than 0.7 ps.multidot.km.sup.-1/2 ; mode field diameter not less than 4.5 .mu.m and not more than 6.5 .mu.m; cut-off wavelength not less than 0.7 .mu.m and not more than 1.7 .mu.m in the length of 2 m; and bending loss at the diameter of 20 mm, not more than 100 dB/m. The dispersion compensating fiber is optically connected with a dispersion shifted fiber as a compensated object at a ratio of appropriate lengths, which can improve the system including the dispersion compensating fiber in the total chromatic dispersion and dispersion slope of the system in the 1.55 .mu.m band.
摘要翻译： 本发明涉及一种用于改善传输系统的色散补偿光纤，其在1.55μm波长带中的总色散和色散斜率。 根据本发明的色散补偿光纤的特征在于对于1.55μm波长带中的光具有以下特性：色散不低于-40ps / km / nm且不大于0ps / km / nm; 色散斜率不小于-0.5 ps / km / nm2，不大于-0.1 ps / km / nm2; 传输损耗不超过0.5 dB / km; 偏振模色散不大于0.7 psxkm- + E，fra 1/2 + EE; 模场直径不小于4.5亩，不超过6.5亩; 截止波长不小于0.7μm，长度不超过1.7μm; 弯曲损耗为20mm，不大于100dB / m。 色散补偿光纤以适当长度的比例与作为补偿对象的色散位移光纤光学连接，这可以改善包括色散补偿光纤在1.55μm带中的系统的总色散和色散斜率的系统 。
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公开(公告)号：US5532870A
公开(公告)日：1996-07-02
申请号：US346256
申请日：1994-11-23
IPC分类号： G02B6/00 , G02B6/02 , H01S3/06 , H01S3/067 , H01S3/094 , H01S3/0941 , H01S3/10 , H01S3/16 , H01S3/17 , H04J14/02 , H01S3/00 , H01S3/30
CPC分类号： H04B10/2912 , H01S3/06754 , H04B10/291 , H04B10/2935 , H04B10/294 , H04J14/0221 , H01S2301/04 , H01S3/1608 , H04B2210/003
摘要： An optical fiber amplifier comprises a composite optical fiber for receiving signal light and excitation light, amplifying the signal light and emitting the amplified signal light, comprising at least two kinds of optical fibers serially coupled each having a glass composition selected from at least two kinds of rare-earth-doped glass compositions, and excitation means for generating excitation light and supplying it to the composite optical fiber. Then, an optical fiber amplifier which reduces the wavelength dependency of gain in various wavelength ranges in wavelength division multiplexing transmission or in optical analog transmission, and which maintains an energy efficiency for amplification, an optical fiber amplifier which makes a wavelength at a gain peak to a predetermined one in accordance with intensities of various input lights, and an optical amplifier repeater comprising this optical fiber amplifier are provided.
摘要翻译： 光纤放大器包括用于接收信号光和激发光的复合光纤，放大信号光并发射放大的信号光，包括至少两种串联耦合的光纤，每个光纤具有选自以下的至少两种 稀土掺杂的玻璃组合物，以及用于产生激发光并将其提供给复合光纤的激励装置。 然后，在波分多路复用传输或光模拟传输中降低各种波长范围的增益的波长依赖性并且保持放大的能量效率的光纤放大器使波长为增益峰值的光纤放大器 提供根据各种输入光的强度的预定值，以及包括该光纤放大器的光放大器中继器。
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9.发明授权公开(公告)号：US06937810B2
公开(公告)日：2005-08-30
申请号：US10451844
申请日：2001-09-07
申请人： Tomonori Kashiwada , Toshimi Suzuki
发明人： Tomonori Kashiwada , Toshimi Suzuki
CPC分类号： H01S3/06716 , H01S3/1608 , H01S3/1693
摘要： This invention relates to an optical fiber for amplification suitable for amplifying signals in the L-band, an optical fiber amplifier including the optical fiber, and an optical transmission system. The optical fiber amplifier according to the invention includes a silica-based optical fiber as an optical fiber for amplification, which has a core region doped with Er and Al. The optical fiber for amplification has an Er concentration of 1,500 wt.ppm or less, and has the characteristics at a wavelength of 1.53 μm of: an absorption loss of 10 dB/m or more but 25 dB/m or less; and an unsaturated absorption of 900 dB or less.
摘要翻译： 本发明涉及适用于放大L波段信号的放大用光纤，包括光纤的光纤放大器和光传输系统。 根据本发明的光纤放大器包括作为用于放大的光纤的二氧化硅基光纤，其具有掺杂有Er和Al的芯区域。 用于放大的光纤的Er浓度为1500重量ppm以下，其波长为1.53μm的特性为：10dB / m以上且25dB / m以下的吸收损失; 和900dB以下的不饱和吸收。
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公开(公告)号：US5721635A
公开(公告)日：1998-02-24
申请号：US562631
申请日：1995-11-24
CPC分类号： H04B10/2912 , H01S3/06754 , H04B10/291 , H04B10/2935 , H04B10/294 , H04J14/0221 , H01S2301/04 , H01S3/1608 , H04B2210/003
摘要： This method comprises the steps of: introducing light signals having different wavelengths into an optical amplifier, wherein the optical amplifier has a plurality of fibers with rare earth element doped therein and P is selectively doped in said fibers; and introducing excitation light into the fibers, the excitation light being able to excite the rare earth element. At least one of the fibers has Al therein and the relationship between the Al and P concentration satisfies following expression: C(P)/C(Al)>2, where, C(P) is P concentration in the fiber, and C(Al) is Al concentration in the fiber.
摘要翻译： 该方法包括以下步骤：将具有不同波长的光信号引入到光放大器中，其中光放大器具有掺杂有稀土元素的多个光纤，并且P选择性地掺杂在所述光纤中; 并将激发光引入到纤维中，激发光能够激发稀土元素。 至少其中一根纤维具有Al，Al和P的浓度之间的关系满足下列表达式：C（P）/ C（Al）> 2，其中C（P）是纤维中的P浓度，C（ Al）是纤维中的Al浓度。
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