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    Dispersion compensating fiber and dispersion compensating fiber module
    4.
    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％。

    Joint loss minimizing connection structure for dispersion compensating optical fiber
    5.
    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。

    Connection structure for dispersion compensating optical fiber
    6.
    发明申请
    Connection structure for dispersion compensating optical fiber 失效
    色散补偿光纤的连接结构

    公开(公告)号：US20050041929A1

    公开(公告)日：2005-02-24

    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： G02B6/02 ,  G02B6/036 ,  G02B6/255 ,  G02B6/26

    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 optical fiber, and dispersion compensating optical fiber module
    7.
    发明授权
    Dispersion compensating optical fiber, and dispersion compensating optical fiber module 失效

    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.

    Optical fiber and optical transmission system
    8.
    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。

    Dispersion-compensating optical fiber and hybrid transmission line
    9.
    发明授权
    Dispersion-compensating optical fiber and hybrid transmission line 失效
    色散补偿光纤和混合传输线

    公开(公告)号：US06980723B2

    公开(公告)日：2005-12-27

    申请号：US10866421

    申请日：2004-06-11

    申请人： Kazuhiko Aikawa ,  Manabu Saitou ,  Takaaki Suzuki ,  Shoichiro Matsuo ,  Takashi Suzuki ,  Koichi Harada ,  Akira Wada

    发明人： Kazuhiko Aikawa ,  Manabu Saitou ,  Takaaki Suzuki ,  Shoichiro Matsuo ,  Takashi Suzuki ,  Koichi Harada ,  Akira Wada

    IPC分类号： G02B6/02 ,  G02B6/22 ,  G02B6/16

    CPC分类号： G02B6/02009 ,  G02B6/02228 ,  G02B6/02261 ,  G02B6/0228 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/03666

    摘要： In order to provide a dispersion-compensating optical fiber able to be applied over a broad wavelength band, having a large effective area, and as a result, suppressing the occurrence of non-linear effects, the present invention comprises a dispersion-compensating optical fiber that compensates chromatic dispersion of a 1.3 μm single-mode optical fiber over the entire wavelength range of 1.53-1.63 μm characterized in that, chromatic dispersion at a wavelength of 1.55 μm is −50 ps/nm/km or less, the dispersion slope is negative over the entire wavelength range of 1.53-1.63 μm, a cutoff wavelength is provided at which there is substantially single-mode propagation, bending loss is 30 dB/m or less, effective area is 20 μm2 or more, and the absolute value of chromatic dispersion during compensation of the chromatic dispersion of a 1.3 μm single-mode optical fiber serving as the target of compensation is 0.5 ps/nm/km or less.

    摘要翻译： 为了提供能够在宽波长带上施加的具有大的有效面积的色散补偿光纤，结果抑制非线性效应的发生，本发明包括色散补偿光纤 其在1.53-1.63μm的整个波长范围内补偿1.3μm单模光纤的色散，其特征在于，在1.55μm波长的色散为-50ps / nm / km或更小，色散斜率为 在1.53-1.63μm的整个波长范围内为负，提供截止波长，其中基本上单模传播，弯曲损耗为30dB / m以下，有效面积为20mum 2 以上，补偿作为补偿对象的1.3μm单模光纤的色散补偿期间的色散的绝对值为0.5ps / nm / km以下。