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    Dispersion compensating optical fiber
    1.
    发明授权
    Dispersion compensating optical fiber 失效
    色散补偿光纤

    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。

    Polarized wave holding optical fiber, production method therefor, connection method therefor, optical amplifier, laser oscillator and polarized wave holding optical fiber coupler
    5.
    发明授权
    Polarized wave holding optical fiber, production method therefor, connection method therefor, optical amplifier, laser oscillator and polarized wave holding optical fiber coupler 失效
    极化波保持光纤，其制造方法，其连接方法，光放大器，激光振荡器和偏振波保持光纤耦合器

    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。

    Optical fiber and optical transmission system
    6.
    发明授权
    Optical fiber and optical transmission system 有权
    光纤和光传输系统

    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。

    Hole-assisted holey fiber and low bending loss multimode holey fiber
    7.
    发明授权
    Hole-assisted holey fiber and low bending loss multimode holey fiber 有权
    孔辅助多孔纤维和低弯曲损耗多模多孔纤维

    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。

    Joint loss minimizing connection structure for dispersion compensating optical fiber
    8.
    发明授权
    Joint loss minimizing connection structure for dispersion compensating optical fiber 失效
    联合损耗最小化色散补偿光纤的连接结构

    公开(公告)号：US07036995B2

    公开(公告)日：2006-05-02

    申请号：US10950304

    申请日：2004-09-23

    申请人： Takaaki Suzuki ,  Shogo Shimizu ,  Kazuhiko Aikawa ,  Kuniharu Himeno

    发明人： Takaaki Suzuki ,  Shogo Shimizu ,  Kazuhiko Aikawa ,  Kuniharu Himeno

    IPC分类号： G02B6/38 ,  G02B6/255 ,  G02B6/02 ,  G02B6/22

    CPC分类号： G02B6/02261 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/0365 ,  G02B6/2552

    摘要： In fusion-splicing a dispersion compensating optical fiber having a negative dispersion slope, with a connection optical fiber having a different near field pattern from that of the dispersion compensating optical fiber, if for the connection optical fiber, one is selected such that a theoretical joint loss in a used wavelength, obtained from an overlap integral of a near field pattern of the dispersion compensating optical fiber after fusion splicing and a near field pattern of the connection optical fiber after fusion splicing is presumed to be 0.3 dB or less, in an unconnected state, a construction enabling connection at a low loss results.

    摘要翻译： 在使用具有与色散补偿光纤不同的近场图案的连接光纤熔接具有负色散斜率的色散补偿光纤时，如果对于连接光纤，选择一个理论接头 在熔接后的色散补偿光纤的近场图案与熔接后的连接光纤的近场图案的重叠积分中获得的使用波长的损失在未连接的情况下被推定为0.3dB以下 状态，一种能够以低损失结果实现连接的结构。

    Dispersion compensating fiber and dispersion compensating fiber module
    9.
    发明授权
    Dispersion compensating fiber and dispersion compensating fiber module 有权
    色散补偿光纤和色散补偿光纤模块

    公开(公告)号：US06937805B2

    公开(公告)日：2005-08-30

    申请号：US10270569

    申请日：2002-10-16

    申请人： Kazuhiko Aikawa ,  Shogo Shimizu ,  Takaaki Suzuki ,  Ryuji Suzuki ,  Masakazu Nakayama ,  Kuniharu Himeno

    发明人： Kazuhiko Aikawa ,  Shogo Shimizu ,  Takaaki Suzuki ,  Ryuji Suzuki ,  Masakazu Nakayama ,  Kuniharu Himeno

    IPC分类号： G02B6/036 ,  G02B6/16 ,  G02B6/18 ,  G02B6/20 ,  G02B6/22

    CPC分类号： G02B6/03666 ,  G02B6/02261 ,  G02B6/0228 ,  G02B6/03644

    摘要： A dispersion compensating fiber, which has a negative dispersion slope with a large absolute value while maintaining the absolute value of the chromatic dispersion, and which has sufficient dispersion slope compensation properties even for the non-zero dispersion shifted optical fiber requiring a large RDS for dispersion compensation. In this dispersion compensating fiber, the radius of a ring core region is set in a range from 6.7 μm to 10.7 μm, the radius ratio of a depressed core region relative to a central core region is set in a range from 2.0 to 3.0, and the radius ratio of the ring core region relative to the depressed core region is set in a range from 1.3 to 2.0, the relative refractive index difference of the central core region relative to the cladding is set in a range from +1.00% to +1.80%, the relative refractive index difference of the depressed core region relative to the cladding is set in a range from −1.20% to −1.50%, and the relative refractive index difference of the ring core region relative to the cladding is set in a range from +0.20% to +0.50%.

    摘要翻译： 一种色散补偿光纤，其具有大的绝对值的负色散斜率，同时保持色散的绝对值，并且即使对于需要大的RDS的分散的非零色散位移光纤也具有足够的色散斜率补偿特性 补偿。 在该色散补偿光纤中，环芯区域的半径设定在6.7μm〜10.7μm的范围内，凹陷芯区域相对于中心纤芯区域的半径比设定在2.0〜3.0的范围内， 环芯区域相对于凹陷芯区域的半径比设定在1.3至2.0的范围内，中心芯区域相对于包层的相对折射率差设定在+ 1.00％至+1.80的范围内 凹陷芯区域相对于包层的相对折射率差设定在-1.20％至-1.50％的范围内，并且环形芯区域相对于包层的相对折射率差被设定在一个范围内 从+ 0.20％到+ 0.50％。

    Connection method and connecting structure for photonic crystal fiber
    10.
    发明授权
    Connection method and connecting structure for photonic crystal fiber 有权
    光子晶体光纤的连接方法和连接结构

    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。