公开(公告)号：US5689578A

公开(公告)日：1997-11-18

申请号：US318848

申请日：1994-10-25

申请人： Ryozo Yamauchi ,  Kuniharu Himeno ,  Minoru Sawada ,  Fumio Suzuki ,  Kazuhiko Aikawa ,  Tetsuo Nozawa ,  Shigefumi Yamasaki

发明人： Ryozo Yamauchi ,  Kuniharu Himeno ,  Minoru Sawada ,  Fumio Suzuki ,  Kazuhiko Aikawa ,  Tetsuo Nozawa ,  Shigefumi Yamasaki

IPC分类号： C03B37/012 ,  G02B6/10 ,  G02B6/255 ,  G02B6/28 ,  G02B6/34 ,  H01S3/067

CPC分类号： G02B6/024 ,  C03B37/01217 ,  C03B37/01222 ,  G02B6/02042 ,  G02B6/2843 ,  H01S3/06708 ,  C03B2201/31 ,  C03B2201/36 ,  C03B2203/02 ,  C03B2203/12 ,  C03B2203/22 ,  C03B2203/30 ,  C03B2203/31 ,  C03B2203/34 ,  G02B6/2551 ,  G02B6/2552

摘要： The polarization-maintaining optical fiber 10 of the present invention is designed so that a plurality of core portions 12a,12b which have a high refractive index is provided in parallel along a single diameter direction in the cross section of the optical fiber, these core portions 12a,12b cooperating to propagate a single fundamental mode. In the production method for the polarization-maintaining optical fiber of the present invention, a plurality of holes 22 are formed longitudinally in parallel along a single diameter direction of a glass rod 21 having a low refractive index which forms the cladding, glass rods 23 for core use having a high refractive index which form the core portions are inserted into these holes 22, heating to form a unitary body is carried out, creating a preform which is then drawn. Further, the rare-earth-doped polarization-maintaining optical fiber of the present invention uses a rare earth element to dope the optical waveguide portion of the polarization-maintaining optical fiber, and can be employed in a light amplifier or laser oscillator. Moreover, the polarization-maintaining optical fiber coupler of the present invention is formed by bringing two or more polarization maintaining optical fibers into contact, heating, fusing and elongating them, and heating the vicinity of the connection point before and after connection.

摘要翻译： PCT No.PCT / JP94 / 00300 Sec。 371日期：1994年10月25日 102（e）日期1994年10月25日PCT 1994年2月24日PCT PCT。 第WO94 / 17714号公报 日期1994年9月1日本发明的偏振波保持光纤10被设计成使得在光学部件的横截面中沿着单一直径方向平行设置多个具有高折射率的芯部12a，12b 光纤，这些芯部分12a，12b协作传播单个基本模式。 在本发明的偏振波保持光纤的制造方法中，多个孔22沿着形成包层的折射率低的玻璃棒21的单一直径方向纵向平行地形成，玻璃棒23用于 形成芯部的具有高折射率的芯用途被插入到这些孔22中，进行加热以形成整体，形成预先形成的预成型体。 此外，本发明的稀土掺杂偏振保持光纤使用稀土元素来掺杂保偏光纤的光波导部分，并且可以用在光放大器或激光振荡器中。 此外，本发明的偏振保持光纤耦合器是通过使两个或更多个保偏光纤接触，加热，熔化和拉伸，以及在连接之前和之后加热连接点附近而形成的。

公开(公告)号：US06519402B2

公开(公告)日：2003-02-11

申请号：US09901379

申请日：2001-07-09

申请人： Kazuhiko Aikawa ,  Takaaki Suzuki ,  Kuniharu Himeno

发明人： Kazuhiko Aikawa ,  Takaaki Suzuki ,  Kuniharu Himeno

IPC分类号： G02B602

CPC分类号： G02B6/02009 ,  G02B6/02261 ,  G02B6/02266 ,  G02B6/0228 ,  G02B6/03627 ,  G02B6/03644

摘要： By limiting the ranges of the numerical values of a plurality of structural parameters of a dispersion compensating optical fiber which is endowed with a segmented W-shaped refractive index profile, and by suitably combining these structural parameters, it is possible to obtain a dispersion compensating optical fiber which can compensate both for chromatic dispersion and also for dispersion slope of a single mode optical fiber for transmission over a wide wavelength band which is selected from the range from 1.53 &mgr;m to 1.63 &mgr;m, and for which the value of Aeff is large, and moreover the absolute value of chromatic dispersion is large. As a result desirable transmission characteristics are obtained by being able to suppress the occurrence of nonlinearity effects, and furthermore, since the length which is required is short, the cost is low, and it is possible to produce a module which is small in size.

公开(公告)号：US07076139B1

公开(公告)日：2006-07-11

申请号：US09635109

申请日：2000-08-09

申请人： Kazuhiko Aikawa ,  Takashi Suzuki ,  Akira Wada ,  Ryozo Yamauchi ,  Takaaki Suzuki ,  Shoichiro Matsuo ,  Manabu Saitou

发明人： Kazuhiko Aikawa ,  Takashi Suzuki ,  Akira Wada ,  Ryozo Yamauchi ,  Takaaki Suzuki ,  Shoichiro Matsuo ,  Manabu Saitou

IPC分类号： G02B6/02

CPC分类号： G02B6/03644 ,  G02B6/02019 ,  G02B6/02238 ,  G02B6/02261 ,  G02B6/02266 ,  G02B6/03627 ,  G02B6/29377 ,  G02B6/29394 ,  H04B10/2525

摘要： An optical fiber is fabricated with a refractive index profile having a central core; a middle part provided around the outer periphery of the central core and having a lower refractive index than that of the central core; and a cladding provided around the periphery of the middle part and having a higher refractive index than the middle part and a lower refractive index than the central core. This optical fiber has an effective core area of 120 μm2 or more in an employed wavelength band selected from the range of 1.53˜1.63 μm, and has a cut-off wavelength that is capable of substantially single mode propagation in the aforementioned employed wavelength band. As a result, it is possible to construct an optical transmission system having excellent transmission characteristics in which nonlinearity is decreased.

摘要翻译： 制造具有中心芯的折射率分布的光纤; 中间部分围绕中心芯的外周设置，折射率低于中心芯的折射率; 以及围绕中间部分的周边设置并且具有比中间部分更高的折射率和比中心芯部更低的折射率的包层。 该光纤在选自1.53〜1.63μm范围内的使用波长带中具有120m 2以上的有效核心面积，并且具有能够基本上单模的截止波长 在上述使用的波长带中的传播。 结果，可以构成具有优异的非线性降低的传输特性的光传输系统。

公开(公告)号：US07292762B2

公开(公告)日：2007-11-06

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：US07267495B2

公开(公告)日：2007-09-11

申请号：US11154731

申请日：2005-06-17

申请人： Ryuji Suzuki ,  Kazuhiko Aikawa ,  Kuniharu Himeno ,  Ning Guan

发明人： Ryuji Suzuki ,  Kazuhiko Aikawa ,  Kuniharu Himeno ,  Ning Guan

IPC分类号： G02B6/255

CPC分类号： G02B6/2551 ,  G02B6/02347 ,  G02B6/02361

摘要： A connection method for a photonic crystal fiber for connecting the photonic crystal fiber and a fiber to be connected, the photonic crystal fiber including a cladding region having a number of microholes and a core region having a same refractive index as that of the cladding region, includes the steps of: abutting respective end faces of the photonic crystal fiber and the fiber to be connected each other; after the abutting, performing a main discharge in which an abutted portion is heated by an electric discharge under a first condition; and after the main discharge, performing an additional discharge in which the connection portion is heated by an electric discharge at least once under a second condition to increase a splice strength.

摘要翻译： 一种用于连接光子晶体光纤和待连接光纤的光子晶体光纤的连接方法，包括具有多个微孔的包层区域和具有与包层区域相同折射率的纤芯区域的光子晶体光纤， 包括以下步骤：将要连接的光子晶体光纤和光纤的各个端面邻接; 在抵接之后，在第一状态下进行通过放电加热抵接部的主放电; 并且在主放电之后，在第二条件下进行至少一次的放电使连接部分被加热的附加放电以增加接合强度。

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：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：US07412128B2

公开(公告)日：2008-08-12

申请号：US11739589

申请日：2007-04-24

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： G02B6/26 ,  G02B6/42

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：US20070201791A1

公开(公告)日：2007-08-30

申请号：US11739589

申请日：2007-04-24

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： G02B6/26

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。