公开(公告)号：US06856738B2

公开(公告)日：2005-02-15

申请号：US09732725

申请日：2000-12-11

申请人： Takatoshi Kato ,  Shigeru Tanaka ,  Masashi Onishi ,  Yuji Kubo

发明人： Takatoshi Kato ,  Shigeru Tanaka ,  Masashi Onishi ,  Yuji Kubo

IPC分类号： G02B6/036 ,  G02B6/22

CPC分类号： G02B6/02009 ,  G02B6/02257 ,  G02B6/03644 ,  G02B6/03666

摘要： An optical fiber and an optical transmission system are provided which enable a large-volume and long-haul transmission, using light signals having a plurality of wavelengths in a wide range of wavelength bands including 1.31 μm band, 1.45 μm band, 1.55 μm band and 1.58 μm band. The chromatic dispersion of the optical fiber according to the present invention is −20 ps•nm−1•km−3 or more but −3 ps•nm−1•km−1 or less in the whole wavelength range of 1300 nm to 1600 nm. The optical transmission system according to the present invention is also equipped with (1) a plurality of transmitters to transmit light signals having wavelengths in the range of 1300 nm to 1600 nm, (2) an optical fiber of the present invention, and (3) receivers which receive the light signals.

摘要翻译： 提供一种光纤和光传输系统，其使得能够进行大容量和长距离的传输，使用在宽范围的波段中具有多个波长的光信号，包括1.31个母带，1.45个母带，1.55个母带，以及 1.58个妈咪乐队。 根据本发明的光纤的色散在-20ps.nm -1 -3km以上，但-3ps.nm -1 -1km以下。 整个波长范围为1300 nm至1600 nm。 根据本发明的光传输系统还配备有（1）多个发射机，用于发射波长在1300nm至1600nm范围内的光信号，（2）本发明的光纤和（3 ）接收器接收光信号。

公开(公告)号：US06490397B2

公开(公告)日：2002-12-03

申请号：US09732933

申请日：2000-12-11

申请人： Takatoshi Kato ,  Masashi Onishi ,  Yuji Kubo

发明人： Takatoshi Kato ,  Masashi Onishi ,  Yuji Kubo

IPC分类号： G02B602

CPC分类号： G02B6/02009 ,  G02B6/02257 ,  G02B6/03666

摘要： An optical fiber whose chromatic dispersions have an opposite sign relative to those of the 1380 nm zero-dispersion fiber at all of the wavelengths in the range of 1450 nm to 1620 nm is provided. This optical fiber has negative chromatic dispersions at all of the wavelengths in this range and the values of which are −7 ps·nm−1·km−1 or more but −1 ps·nm−1·km−1 or less at a wavelength of 1450 nm, −12 ps·nm−1·km−1 or more but −5 ps·nm−1·km−1 or less at a wavelength of 1550 nm and −17 ps·nm−1·km−1 or more but −6 ps·nm−1·km−1 or less at a wavelength of 1620 nm. This optical fiber can compensate the dispersions of 1380 nm zero-dispersion fiber over the entire wavelength in this range.

摘要翻译： 提供了一种光纤，其色调与1480nm至1620nm范围内的所有波长的1380nm零色散光纤具有相反的符号。 该光纤在该范围内的所有波长处具有负色散，其值在-7ps.nm-1.km-1或更大但-1ps.nm-1.km-1或更低 波长1450nm，波长1550nm -12ps.nm-1.km-1或-5ps.nm-1.km-1以下，-17ps.nm-1.km-1 或更多，但波长为1620nm时为-6ps.nm-1.km-1或更小。 该光纤可以在此范围内补偿1380nm零色散光纤在整个波长上的分散。

公开(公告)号：US06748152B2

公开(公告)日：2004-06-08

申请号：US10098172

申请日：2002-03-15

申请人： Yuji Kubo ,  Masashi Onishi ,  Takatoshi Kato

发明人： Yuji Kubo ,  Masashi Onishi ,  Takatoshi Kato

IPC分类号： G02B602

CPC分类号： H04B10/2916 ,  G02B6/02242 ,  G02B6/02271

摘要： The optical transmission system in accordance with the present invention is an optical transmission system in which an optical fiber transmission line is laid between a transmitting station and a receiving station, first and second optical couplers are provided on the optical fiber transmission line, a first Raman amplification pumping light source is connected to the first optical coupler, a second Raman amplification pumping light source is connected to the second optical coupler, the optical fiber transmission line Raman-amplifies signal light in S band when Raman amplification pumping light is supplied thereto while transmitting the signal light, and the optical fiber transmission line has a zero-dispersion wavelength of 1350 nm to 1440 nm and a cable cutoff wavelength of less than 1368 nm.

摘要翻译： 根据本发明的光传输系统是一种光传输系统，其中在发射站和接收站之间铺设光纤传输线，第一和第二光耦合器设置在光纤传输线上，第一拉曼 放大泵浦光源连接到第一光耦合器，第二拉曼放大泵浦光源连接到第二光耦合器，当传输拉曼放大泵浦光时，光纤传输线拉曼放大S波段中的信号光 信号光和光纤传输线具有1350nm至1440nm的零色散波长和小于1368nm的电缆截止波长。

公开(公告)号：US06567596B2

公开(公告)日：2003-05-20

申请号：US09732884

申请日：2000-12-11

申请人： Takatoshi Kato ,  Masashi Onishi ,  Yuji Kubo

发明人： Takatoshi Kato ,  Masashi Onishi ,  Yuji Kubo

IPC分类号： G02B602

CPC分类号： G02B6/02009 ,  G02B6/02242 ,  G02B6/03644 ,  G02B6/03666

摘要： An optical fiber that can sufficiently suppress the generation of four-wave mixing and that can widen the bandwidth of wavelength of signal light. The optical fiber of the present invention has (a) a chromatic dispersion whose absolute value is not less than 8 ps·nm−1·km−1 and not more than 15 ps·nm−1·km−1 at a wavelength of 1.55 &mgr;m and (b) a dispersion slope whose absolute value is not more than 0.05 ps·nm−2·km−1 at a wavelength of 1.55 &mgr;m. It is more desirable that the optical fiber have (a) a chromatic dispersion whose absolute value is not less than 8 ps·nm−1·km−1 and not more than 12 ps·nm−1·km−1 at a wavelength of 1.55 &mgr;m, (b) a dispersion slope whose absolute value is not more than 0.03 ps·nm−2·km−1 at a wavelength of 1.55 &mgr;m, (c) a chromatic dispersion whose absolute value is not less than 5 ps·nm−1·km−1 at wavelengths between 1.45 and 1.65 &mgr;m, (d) an effective area not less than 45 &mgr;m2 at a wavelength of 1.55 &mgr;m, and (e) a two-meter cutoff wavelength not less than 1.40 &mgr;m.

摘要翻译： 可以充分抑制四波混频的产生并且可以加宽信号光的波长带宽的光纤。 本发明的光纤具有（a）在1.55的波长下绝对值不小于8ps.nm-1.km-1且不大于15ps.nm-1.km-1的色散 妈妈和（b）在1.55μm波长下绝对值不大于0.05ps.nm-2.km-1的色散斜率。 更希望的是，光纤具有（a）绝对值不小于8ps.nm-1.km-1且不大于12ps.nm-1.km-1的波长的色散 1.55μm，（b）在1.55μm波长下绝对值不大于0.03ps.nm-2.km-1的色散斜率，（c）绝对值不小于5ps.nm的色散 -1.km-1，波长在1.45和1.65之间，（d）有效面积不小于45mum2，波长为1.55μm，（e）两米截止波长不小于1.40mum。

公开(公告)号：US06532331B1

公开(公告)日：2003-03-11

申请号：US09698105

申请日：2000-10-30

申请人： Takatoshi Kato ,  Masashi Onishi ,  Eisuke Sasaoka

发明人： Takatoshi Kato ,  Masashi Onishi ,  Eisuke Sasaoka

IPC分类号： G02B602

CPC分类号： G02B6/03644 ,  G02B6/02014 ,  G02B6/02271 ,  G02B6/0283 ,  G02B6/03611 ,  G02B6/03627

摘要： The present invention relates to an optical fiber comprising a structure which effectively suppresses the occurrence of nonlinear phenomena without increasing transmission loss such as macrobending loss. The optical fiber according to the present invention comprises, radially in succession from the center axis thereof, a center region having a predetermined refractive index, a first annular region having a higher refractive index than the center region, and a second annular region doped with fluorine and having a lower refractive index than the first annular region. In particular, this optical fiber has an effective area of 70 &mgr;m2 or more with respect to light having a wavelength of 1550 nm, whereas the fluorine contents in the second annular region is adjusted such that the refractive index thereof decreases with distance from the center of the optical fiber.

摘要翻译： 本发明涉及一种光纤，其包括有效抑制非线性现象的发生而不增加诸如宏弯损耗的传输损耗的结构。 根据本发明的光纤从其中心轴径向连续地包括具有预定折射率的中心区域，具有比中心区域更高的折射率的第一环形区域和掺杂有氟的第二环形区域 并且具有比第一环形区域更低的折射率。 特别地，该光纤相对于波长为1550nm的光具有70mum2以上的有效面积，而第二环状区域中的氟含量被调整为使得其折射率随着距离 光纤。

公开(公告)号：US06374027B1

公开(公告)日：2002-04-16

申请号：US09636635

申请日：2000-08-11

申请人： Masashi Onishi ,  Masaaki Hirano ,  Takatoshi Kato

发明人： Masashi Onishi ,  Masaaki Hirano ,  Takatoshi Kato

IPC分类号： G02B602

CPC分类号： G02B6/02247 ,  G02B6/29377 ,  H04B10/25253

摘要： There is provided an optical fiber transmission-line with which the four-wave mixing generation can be suppressed effectively and also transmission loss is small. An optical fiber transmission-line 10 is dispersion-managed by a single silica optical fiber thereof being provided alternately in its longitudinal direction with parts 10a where the chromatic dispersion at the wavelength 1550 nm is positive and parts 10b where it is negative. In any one repeater span of the transmission-line there are at least four sign change positions P at which the sign of the chromatic dispersion changes in the longitudinal direction; the absolute value of the average changing rate of chromatic dispersion in each sign change locality A, each sign change locality A being a range including a sign change position P over which the absolute value of the chromatic dispersion is less than 2 ps/nm/km, is not less than 0.008 ps/nm/km/m and not greater than 4 ps/nm/km/m; the absolute value of the average value of the chromatic dispersion over the whole conduit is not greater than 2 ps/nm/km; the average value of the effective core area over the whole transmission-line is not less than 50 &mgr;m2; the average value of the transmission loss over the whole transmission-line is not greater than 0.25 dB/km; and the average value of the polarization mode dispersion over the whole transmission-line is not greater than 0.2 ps/km/½.

摘要翻译： 提供了能够有效抑制四波混频发生的光纤传输线，并且传输损耗小。 光纤传输线10由其单个二氧化硅光纤沿其纵向交替地与波长1550nm的色散为正的部分10a和其中为负的部分10b分散管理。 在传输线的任何一个中继器跨度中，至少有四个符号改变位置P，其中色散的符号在纵向方向上变化; 每个符号改变位置A中的色散的平均变化率的绝对值，每个符号改变位置A是包括色散的绝对值小于2ps / nm / km的符号改变位置P的范围 不小于0.008ps / nm / km / m且不大于4ps / nm / km / m; 整个导管上色散平均值的绝对值不大于2 ps / nm / km; 整个传输线有效核心区域的平均值不小于50 mum2; 整个传输线的传输损耗平均值不大于0.25 dB / km; 并且整个传输线上的偏振模色散的平均值不大于0.2ps / km /½。

公开(公告)号：US06546180B1

公开(公告)日：2003-04-08

申请号：US09240690

申请日：1999-02-02

申请人： Yasushi Koyano ,  Eisuke Sasaoka ,  Shigeru Tanaka ,  Kohei Kobayashi ,  Masashi Onishi

发明人： Yasushi Koyano ,  Eisuke Sasaoka ,  Shigeru Tanaka ,  Kohei Kobayashi ,  Masashi Onishi

IPC分类号： G02B600

CPC分类号： G02B6/4457 ,  G02B6/02261 ,  G02B6/02395 ,  G02B6/03627 ,  H01S3/06704

摘要： After a wide-band DCF is wound around a bobbin to form an optical fiber coil 32, the latter is removed from the bobbin and placed into a bundle state (the state where the increase in transmission loss in the wavelength band of 1.55 &mgr;m caused by distortions in winding is reduced by 0.1 dB/km or more) released from distortions in winding. A resin 42 is used as a coil-tidying member so as to secure the optical fiber coil 32 to a storage case 40 at four positions. Both ends of the optical fiber coil 32 are connected to pigtail fibers at fusion-splicing parts 44; respectively. Even when the storage case 40 is closed with a lid after the optical fiber coil 32 is secured to the storage case 40 with the resin 42, there remain interstices within the bundle of the optical fiber coil 32 and a space between the optical fiber coil 32 and the storage case 40. As a result, even when the optical fiber coil 32 in a bundle state is accommodated in the storage case 40, transmission loss and the like would not increase.

摘要翻译： 在宽带DCF缠绕在线轴上以形成光纤线圈32之后，将其从线轴上取下并放置成捆状态（由1.55μm的波长带的传输损耗的增加引起的状态 绕组失真减少了0.1 dB / km以上）。 树脂42用作线圈整理构件，以将光纤线圈32固定在四个位置处的存储盒40上。 光纤线圈32的两端在熔接部44连接到尾纤; 分别。 即使当光纤线圈32用树脂42固定在存储盒40上之后，当用盖子封闭存储盒40时，在光纤线圈32的束内仍然有空隙，并且光纤线圈32之间的空间 结果，即使束状态的光纤线圈32被容纳在收容箱40中，传输损耗等也不会增加。

公开(公告)号：US07043131B2

公开(公告)日：2006-05-09

申请号：US10217433

申请日：2002-08-14

申请人： Yasushi Koyano ,  Eisuke Sasaoka ,  Shigeru Tanaka ,  Kohei Kobayashi ,  Masashi Onishi ,  Kenji Tamano ,  Takashi Fujii

发明人： Yasushi Koyano ,  Eisuke Sasaoka ,  Shigeru Tanaka ,  Kohei Kobayashi ,  Masashi Onishi ,  Kenji Tamano ,  Takashi Fujii

IPC分类号： G02B6/00

CPC分类号： G02B6/4457 ,  G02B6/02214 ,  G02B6/02261 ,  G02B6/02395 ,  G02B6/03627 ,  Y10T428/2933

摘要： After a wide-band DCF is wound around a bobbin to form an optical fiber coil 32, the latter is removed from the bobbin and placed into a bundle state (the state where the increase in transmission loss in the wavelength band of 1.55 μm caused by distortions in winding is reduced by 0.1 dB/km or more) released from distortions in winding. A resin 42 is used as a coil-tidying member so as to secure the optical fiber coil 32 to a storage case 40 at four positions. Both ends of the optical fiber coil 32 are connected to pigtail fibers at fusion-splicing parts 44, respectively. Even when the storage case 40 is closed with a lid after the optical fiber coil 32 is secured to the storage case 40 with the resin 42, there remain interstices within the bundle of the optical fiber coil 32 and a space between the optical fiber coil 32 and the storage case 40. As a result, even when the optical fiber coil 32 in a bundle state is accommodated in the storage case 40, transmission loss and the like would not increase.

公开(公告)号：US06650821B1

公开(公告)日：2003-11-18

申请号：US09477561

申请日：2000-01-04

申请人： Yasushi Koyano ,  Eisuke Sasaoka ,  Shigeru Tanaka ,  Kohei Kobayashi ,  Masashi Onishi ,  Kenji Tamano ,  Takashi Fujii

发明人： Yasushi Koyano ,  Eisuke Sasaoka ,  Shigeru Tanaka ,  Kohei Kobayashi ,  Masashi Onishi ,  Kenji Tamano ,  Takashi Fujii

IPC分类号： G02B600

CPC分类号： G02B6/4457 ,  G02B6/02214 ,  G02B6/02261 ,  G02B6/02395 ,  G02B6/03627 ,  Y10T428/2933

摘要： After a wide-band DCF is wound around a bobbin to form an optical fiber coil 32, the latter is removed from the bobbin and placed into a bundle state (the state where the increase in transmission loss in the wavelength band of 1.55 &mgr;m caused by distortions in winding is reduced by 0.1 dB/km or more) released from distortions in winding. A resin 42 is used as a coil-tidying member so as to secure the optical fiber coil 32 to a storage case 40 at four positions. Both ends of the optical fiber coil 32 are connected to pigtail fibers at fusion-splicing parts 44, respectively. Even when the storage case 40 is closed with a lid after the optical fiber coil 32 is secured to the storage case 40 with the resin 42, there remain interstices within the bundle of the optical fiber coil 32 and a space between the optical fiber coil 32 and the storage case 40. As a result, even when the optical fiber coil 32 in a bundle state is accommodated in the storage case 40, transmission loss and the like would not increase.

摘要翻译： 在宽带DCF缠绕在线轴上以形成光纤线圈32之后，将其从线轴上取下并放置成捆状态（由1.55μm的波长带的传输损耗的增加引起的状态 绕组失真减少了0.1 dB / km以上）。 树脂42用作线圈整理构件，以将光纤线圈32固定在四个位置处的存储盒40上。 光纤线圈32的两端分别在熔接部分44处连接到尾纤。 即使当光纤线圈32用树脂42固定在存储盒40上之后，当用盖子封闭存储盒40时，在光纤线圈32的束内仍然有空隙，并且光纤线圈32之间的空间 结果，即使束状态的光纤线圈32被容纳在收容箱40中，传输损耗等也不会增加。

公开(公告)号：US20090133445A1

公开(公告)日：2009-05-28

申请号：US11991266

申请日：2006-08-29

申请人： Tetsuya Haruna ,  Toshiki Taru ,  Motoki Kakui ,  Masashi Onishi

发明人： Tetsuya Haruna ,  Toshiki Taru ,  Motoki Kakui ,  Masashi Onishi

IPC分类号： C03B37/02

CPC分类号： C03B37/018 ,  C03B37/01853 ,  C03B37/01869 ,  C03B2201/30 ,  C03B2201/32 ,  C03B2207/32

摘要： A method for manufacturing a glass body containing bismuth, which can be used for manufacturing an optical fiber having a low background-loss is provided. The method includes depositing a glass micro-particle layer on an inner wall of a glass pipe, consolidating the glass micro-particle layer to form a glass layer, reducing of a diameter of the glass pipe having the glass layer on the inner wall of the glass pipe, and collapsing the glass pipe having been reduced in diameter at the diameter-reducing step so as to form the glass body. At the depositing step, the glass micro-particle layer is formed while an organobismuth compound is being supplied into the glass pipe. At the consolidating step, the glass layer is consolidated while an organobismuth compound is being supplied into the glass pipe. The optical fiber is made by drawing the glass body.

摘要翻译： 提供了可用于制造背景损耗低的光纤的含有铋的玻璃体的制造方法。 该方法包括在玻璃管的内壁上沉积玻璃微粒子层，固化玻璃微粒层以形成玻璃层，减少在玻璃管的内壁上具有玻璃层的玻璃管的直径 玻璃管，并且在直径减小步骤中使直径减小的玻璃管塌缩，以形成玻璃体。 在沉积步骤中，形成玻璃微粒层，同时向玻璃管中供应有机铋化合物。 在固结步骤中，玻璃层被固结，而有机铋化合物被供应到玻璃管中。 光纤通过拉制玻璃体制成。