公开(公告)号：US07263267B2

公开(公告)日：2007-08-28

申请号：US10866828

申请日：2004-06-15

申请人： Ning Guan ,  Kazuhiko Aikawa ,  Masashi Ikeda ,  Kuniharu Himeno ,  Koichi Harada

发明人： Ning Guan ,  Kazuhiko Aikawa ,  Masashi Ikeda ,  Kuniharu Himeno ,  Koichi Harada

IPC分类号： G02B6/02 ,  G02B6/22 ,  G02B6/00

CPC分类号： G02B6/03644 ,  G02B6/02261 ,  G02B6/03627 ,  G02B6/14 ,  G02B6/268 ,  G02B6/2835

摘要： A higher order mode dispersion compensating fiber includes an optical fiber and a first loss layer which is provided within the fiber and which attenuates a lower order mode propagating through the optical fiber while not attenuating a higher order mode which is higher than the lower order mode. A dispersion compensating fiber mode converter for a higher order fiber includes a single mode fiber; a higher order mode dispersion compensating fiber; and a fused and extended portion which has been formed by fusing and extending the single mode fiber and the higher order mode fiber. The fused and extended portion converts between the LP01 mode of the single mode fiber and the LP02 mode of the higher order mode dispersion compensating fiber.

摘要翻译： 高阶模式色散补偿光纤包括光纤和第一损耗层，该第一损耗层设置在光纤内，并且衰减低通过光纤传播的低阶模，同时不衰减高于低阶模的高阶模。 用于高阶光纤的色散补偿光纤模式转换器包括单模光纤; 高阶模色散补偿光纤; 以及通过熔融和延伸单模光纤和高阶模光纤而形成的熔接和延伸部分。 融合和扩展部分在单模光纤的LP 01模式和高阶模色散补偿光纤的LP <02> / O模式之间转换。

公开(公告)号：US07242870B2

公开(公告)日：2007-07-10

申请号：US11036981

申请日：2005-01-19

申请人： Ning Guan ,  Katsuhiro Takenaga ,  Kuniharu Himeno

发明人： Ning Guan ,  Katsuhiro Takenaga ,  Kuniharu Himeno

IPC分类号： H04B10/00

CPC分类号： H04J14/02 ,  G02B6/0288

摘要： A wavelength division multiplexing system includes a wavelength division multiplexing transmission path including a multimode optical fiber that is codoped with germanium and fluorine. The wavelength division multiplexing system may further include a multiplexer and a demultiplexer, in which the multiplexer and the demultiplexer are coupled via the multimode optical fiber. The wavelength division multiplexing system may further include a first multiplexer/demultiplexer and a second multiplexer/demultiplexer, in which the first multiplexer/demultiplexer and the second multiplexer/demultiplexer are coupled via the multimode optical fiber so that a bidirectional wavelength division multiplexing is enabled.

摘要翻译： 波分复用系统包括波分复用传输路径，其包括与锗和氟共掺的多模光纤。 波分复用系统还可以包括多路复用器和解复用器，其中复用器和解复用器经由多模光纤耦合。 波分复用系统还可以包括第一多路复用器/解复用器和第二多路复用器/解复用器，其中第一多路复用器/解复用器和第二多路复用器/解复用器经由多模光纤耦合，使得能够进行双向波分复用。

公开(公告)号：US07139457B2

公开(公告)日：2006-11-21

申请号：US11194463

申请日：2005-08-02

申请人： Ning Guan ,  Shinji Habu ,  Katsuhiro Takenaga ,  Kuniharu Himeno ,  Koichi Harada

发明人： Ning Guan ,  Shinji Habu ,  Katsuhiro Takenaga ,  Kuniharu Himeno ,  Koichi Harada

IPC分类号： G02B6/26 ,  G02B6/10

CPC分类号： G02B6/268 ,  G02B6/0288 ,  H04B10/2581

摘要： In an optical transmission path including multimode optical fibers, modal dispersion is reduced so that signal light can be transmitted at high speed and across a broad band, at low-cost and over a long distance. To reduce modal dispersion, when the transmission path is constructed by coupling a plurality of multimode optical fibers, a length ratio for the multimode optical fibers that obtains the maximum band of the optical transmission path is determined, and the multimode optical fibers are coupled according to this length ratio. The multimode optical fibers that are used have specific refractive index profiles as mode dispersion-compensating fibers. The compensated fiber and the mode dispersion-compensating fiber are coupled with specific lengths.

摘要翻译： 在包括多模光纤的光传输路径中，模式色散减小，使得信号光可以低速和超长距离以高速和宽带传输。 为了减少模态色散，当通过耦合多个多模光纤构成传输路径时，确定获得光传输路径的最大频带的多模光纤的长度比，并且多模光纤根据 这个长度比。 使用的多模光纤具有作为模式色散补偿光纤的特定折射率分布。 补偿光纤和模式色散补偿光纤以特定长度耦合。

公开(公告)号：US20060034574A1

公开(公告)日：2006-02-16

申请号：US11178477

申请日：2005-07-12

申请人： Ning Guan ,  Katsuhiro Takenaga ,  Katsuaki Izoe ,  Kazuhiko Aikawa ,  Kuniharu Himeno

发明人： Ning Guan ,  Katsuhiro Takenaga ,  Katsuaki Izoe ,  Kazuhiko Aikawa ,  Kuniharu Himeno

IPC分类号： G02B6/032

CPC分类号： G02B6/02333 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/14

摘要： A hole-assisted holey fiber is provided. The holey fiber includes a core region; a cladding region around the core region, and a plurality of holes in the cladding region around the core region. The core region has a higher refractive index than that of the cladding region. The holes form an inner hole layer and an outer hole layer, and the inner hole layer has the same number of holes as the number of the holes in the outer hole layer. The outer layer holes are provided in locations in which inner holes are absent when viewed from the center of the core region, and holes defining the same layer have the same diameter. A distance Λ1 from a center of the core region to a center of an inner hole and a distance Λ2 from the center of the core region to a center of an outer hole satisfy the relationship Λ1

摘要翻译： 提供孔辅助多孔纤维。 多孔纤维包括芯区域; 围绕芯区域的包层区域，以及围绕芯区域的包层区域中的多个孔。 芯区域具有比包层区域更高的折射率。 孔形成内孔层和外孔层，内孔层的孔数与外孔层的孔数相同。 外层孔设置在从芯区域的中心观察时不存在内孔的位置，并且限定相同层的孔具有相同的直径。 从芯部区域的中心到内部孔的中心距离λ1到从芯部区域的中心到外部中心的距离λ2<2 < 孔的内径满足关系Lambda 1 N 2 N 2和内孔的直径d 1 N 2，直径d 2 < SUB>满足关系d <1> <= D 2 <2>。

公开(公告)号：US20050201700A1

公开(公告)日：2005-09-15

申请号：US11072533

申请日：2005-03-07

申请人： Kazuhiko Aikawa ,  Ryuji Suzuki ,  Kuniharu Himeno

发明人： Kazuhiko Aikawa ,  Ryuji Suzuki ,  Kuniharu Himeno

IPC分类号： G02B6/02 ,  G02B6/036

CPC分类号： G02B6/29377 ,  G02B6/02233 ,  G02B6/02242 ,  G02B6/02261 ,  G02B6/02271 ,  G02B6/0228 ,  G02B6/0281 ,  G02B6/03666 ,  H04B10/2525

摘要： A dispersion compensating fiber module which, when connected to an optical fiber which exhibits, at a wavelength of 1.55 μm, a chromatic dispersion of between +2 and +6 ps/nm/km, a dispersion slope of between +0.075 ps/nm2/km and +0.095 ps/nm2/pm, and a relative dispersion slope of between 0.016 nm−1 and 0.024 nm−1, performs compensation so that the residual dispersion of the connected optical fiber is reduced, the dispersion compensating fiber module includes a dispersion compensating fiber and at least one optical fiber fused to the dispersion compensating fiber, in which the dispersion compensating fiber module exhibits at a wavelength of 1.55 μm, a relative dispersion slope of between 0.016 nm−1 and 0.026 nm−1; and in a wavelength range between 1.525 μm and 1.565 μm, a maximum residual dispersion difference, when converted per km of the transmission optical fiber, of less than or equal to 0.4 ps/nm/km.

摘要翻译： 一种色散补偿光纤模块，当与在1.55μm波长下表现出+2和+6ps / nm / km之间的色散的光纤连接时，色散斜率在+ 0.075ps / nm < SUP> 2 / km和+0.095ps / nm 2 / pm，以及0.016nm -1至0.024nm之间的相对色散斜率， -1执行补偿，使得连接的光纤的残余色散减小，色散补偿光纤模块包括色散补偿光纤和融合到色散补偿光纤的至少一个光纤，其中色散补偿 光纤模块呈现波长为1.55μm，相对色散斜率为0.016nm -1至0.026nm -1; 并且在1.525μm和1.565μm之间的波长范围内，当传输光纤每km转换时，最大残余色散差小于或等于0.4ps / nm / km。

公开(公告)号：US20050157995A1

公开(公告)日：2005-07-21

申请号：US11036981

申请日：2005-01-19

申请人： Ning Guan ,  Katsuhiro Takenaga ,  Kuniharu Himeno

发明人： Ning Guan ,  Katsuhiro Takenaga ,  Kuniharu Himeno

IPC分类号： G02B6/00 ,  G02B6/028 ,  G02B6/293 ,  H04B10/2581 ,  H04J14/00 ,  H04J14/02 ,  G02B6/02 ,  G02B6/16

CPC分类号： H04J14/02 ,  G02B6/0288

摘要： A wavelength division multiplexing system includes a wavelength division multiplexing transmission path including a multimode optical fiber that is codoped with germanium and fluorine. The wavelength division multiplexing system may further include a multiplexer and a demultiplexer, in which the multiplexer and the demultiplexer are coupled via the multimode optical fiber. The wavelength division multiplexing system may further include a first multiplexer/demultiplexer and a second multiplexer/demultiplexer, in which the first multiplexer/demultiplexer and the second multiplexer/demultiplexer are coupled via the multimode optical fiber so that a bidirectional wavelength division multiplexing is enabled.

摘要翻译： 波分复用系统包括波分复用传输路径，其包括与锗和氟共掺的多模光纤。 波分复用系统还可以包括多路复用器和解复用器，其中复用器和解复用器经由多模光纤耦合。 波分复用系统还可以包括第一多路复用器/解复用器和第二多路复用器/解复用器，其中第一多路复用器/解复用器和第二多路复用器/解复用器经由多模光纤耦合，使得能够进行双向波分复用。

公开(公告)号：US20050053351A1

公开(公告)日：2005-03-10

申请号：US10934723

申请日：2004-09-07

申请人： Ning Guan ,  Katsuhiro Takenaga ,  Kuniharu Himeno

发明人： Ning Guan ,  Katsuhiro Takenaga ,  Kuniharu Himeno

IPC分类号： G02B6/028 ,  G02B6/00

CPC分类号： G02B6/0288 ,  G02B6/03622 ,  G02B6/03694

摘要： A graded-index multimode fiber includes a core made of silica glass, the core having a central region and an outer peripheral region, and a cladding which is provided at an outer periphery of the core. The central region contains one of germanium and phosphorus, and the outer peripheral region contains fluorine.

摘要翻译： 分级折射率多模光纤包括由石英玻璃制成的芯，芯具有中心区域和外周区域，以及设置在芯的外周的包层。 中心区含有锗和磷之一，外周区含有氟。

公开(公告)号：US5995695A

公开(公告)日：1999-11-30

申请号：US59242

申请日：1998-04-13

申请人： Kazuhiko Aikawa ,  Akira Wada ,  Kuniharu Himeno ,  Ryozo Yamauchi

发明人： Kazuhiko Aikawa ,  Akira Wada ,  Kuniharu Himeno ,  Ryozo Yamauchi

IPC分类号： G02B6/02 ,  G02B6/036

CPC分类号： G02B6/02261 ,  G02B6/0228 ,  G02B6/03627

摘要： The present invention is related to an dispersion compensating optical fiber technology, comprising a central core, a middle part with a refractive index lower than this central core, and a cladding with a refractive index higher than said middle part and lower than said central core, characterized in: an outer diameter of said middle part being 2.5.about.3.5 times an outer diameter of said central core; a relative refractive index difference of said cladding to said middle part being -0.08.about.-0.2% with the refractive index of the cladding being zero; and having substantially single-mode transmission in the wavelength 1.55 .mu.m band, the chromatic dispersion being -80 ps/nm/km or less, the dispersion slope being +0.08 ps/nm.sup.2 /km or less, and the bending loss being 1.0 dB/m or less.

摘要翻译： 本发明涉及一种色散补偿光纤技术，其包括中心纤芯，折射率低于该中心纤芯的中间部分和折射率高于所述中间部分且低于所述中心纤芯的包层， 其特征在于，所述中间部分的外径为所述中心芯的外径的2.5倍; 所述包层与所述中间部分的相对折射率差为包层折射率为零的-0.08差异-0.2％; 并且在1.55μm波长的波段中具有基本的单模传输，色散为-80ps / nm / km或更小，色散斜率为+0.08ps / nm2 / km或更小，弯曲损耗为1.0dB / m以下。

公开(公告)号：US5029961A

公开(公告)日：1991-07-09

申请号：US431676

申请日：1989-11-02

申请人： Fumio Suzuki ,  Tohru Arikawa ,  Noboru Kawakami ,  Yoshio Kikuchi ,  Kuniharu Himeno ,  Osamu Fukuda

发明人： Fumio Suzuki ,  Tohru Arikawa ,  Noboru Kawakami ,  Yoshio Kikuchi ,  Kuniharu Himeno ,  Osamu Fukuda

IPC分类号： G02B6/28

CPC分类号： G02B6/283 ,  G02B6/2826 ,  G02B6/2843

摘要： An optical fiber coupler is disclosed, which comprises two polished substrates each of which comprises a grooved substrate having a polished surface on the open side end thereof and adapted to hold therein an optical fiber and an optical fiber comprising a core, a cladding and two stress-applying parts arranged in the cladding so as to sandwich the core, a part of the optical fiber being polished off such that the polished surface of the fiber is close to the core so as to allow leakage of light power propagating in the core to the outside, the polished optical fiber being embedded in the grooved substrate and fixed thereto in such a manner that the polished surface of the grooved substrate is in flush with the polished surface of the polished optical fiber, with the two polished substrates being in close contact with each other at the polished surfaces thereof to allow coupling of light power, wherein said polished optical fiber is of a construction such that the polished surface thereof is perpendicular to the polarization principal axis X defined as the direction connecting the centers of said stress-applying parts. Also, a process for manufacturing the optical fiber coupler is disclosed.

摘要翻译： 公开了一种光纤耦合器，其包括两个抛光衬底，每个衬底包括在其开放侧端具有抛光表面的开槽衬底，并且适于保持光纤和包括芯，包层和两个应力的光纤 将布置在包层中的部件布置成夹住芯部，将光纤的一部分抛光，使得光纤的抛光表面靠近芯部，以便允许将在芯部中传播的光功率泄漏到 抛光后的光纤被嵌入到带槽的基板中并以固定的方式固定，使得凹槽基板的抛光表面与抛光光纤的抛光表面齐平，两个抛光的基板与 彼此在其抛光表面处以允许光功率的耦合，其中所述抛光光纤具有这样的结构， eof垂直于被定义为连接所述应力施加部分的中心的方向的偏振主轴线X. 另外，公开了一种光纤耦合器的制造方法。

公开(公告)号：US20120105947A1

公开(公告)日：2012-05-03

申请号：US12985491

申请日：2011-01-06

申请人： Masahiro Kashiwagi ,  Kuniharu Himeno

发明人： Masahiro Kashiwagi ,  Kuniharu Himeno

IPC分类号： H01S3/067 ,  G02B6/02

CPC分类号： H01S3/06733 ,  G02B6/03611 ,  H01S3/0672 ,  H01S3/0675 ,  H01S3/0804 ,  H01S3/094003 ,  H01S3/094069 ,  H01S3/09408 ,  H01S3/09415 ,  H01S3/1618

摘要： The invention provides an amplification optical fiber, which can output light with a good beam quality even when a higher-order mode is excited, and an optical fiber amplifier using the amplification optical fiber.An amplification optical fiber 50 has a core 51 and a clad 52 covering the core 51. The core 51 propagates light with a predetermined wavelength in at least an LP01 mode, and an LP02 mode, and an LP03 mode. When the LP01 mode, the LP02 mode, and the LP03 mode are standardized by power, in at least a part of a region where the intensity of the LP01 mode is larger than at least one of the intensities of the LP02 mode and the LP03 mode, the active element is added to the core 51 at a higher concentration than the central portion of the core.

摘要翻译： 本发明提供了一种放大光纤，其即使在激发高阶模式时也能输出具有良好光束质量的光，以及使用放大光纤的光纤放大器。 放大光纤50具有芯51和覆盖芯51的包层52.芯51以至少LP01模式和LP02模式和LP03模式传播具有预定波长的光。 当LP01模式，LP02模式和LP03模式通过功率标准化时，在LP01模式的强度大于LP02模式和LP03模式的强度中的至少一个的区域的至少一部分中 以比芯的中心部分更高的浓度将活性元素加入到芯51中。