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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％。

    Dispersion compensating optical fiber
    5.
    发明授权
    Dispersion compensating optical fiber 有权
    色散补偿光纤

    公开(公告)号：US07233728B2

    公开(公告)日：2007-06-19

    申请号：US10507078

    申请日：2003-03-13

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

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

    IPC分类号： G02B6/02

    CPC分类号： G02B6/03644 ,  G02B6/02261 ,  G02B6/02395 ,  G02B6/0281 ,  G02B6/03627

    摘要： A dispersion-compensated optical fiber which does not cause an increase in a loss if it is wound in a small reel and has a stable temperature characteristics is provided, wherein, in a wavelength range from. A dispersion-compensated optical fiber is formed such that, in at least a wavelength between 1.53 to 1.63 μm, a bending loss of with a 20 mm bending diameter is 5 dB/m or lower, a wavelength dispersion is −120 ps/nm/km or lower, a cut-off wavelength under a usage condition is 1.53 μm or lower, an outer diameter of the cladding is 80 to 100 μm, an outer diameter of a coating is 160 to 200 μm, and a viscosity of a surface of a coating resin is 10 gf/mm or lower. It is set such that b/a is 1.5 to 3.5, c/b is 1.2 to 2.0, a radius of a core is 4 to 8 μm, Δ1 is +1.6% to +2.6%, Δ2 is −0.30% to −1.4%, and Δ3 is −0.30% to +1.0%. Young's modulus of a first coating layer is 0.15 kgf/mm2 or lower and its thickness is 20 to 30 μm. Young's modulus of a second coating layer is 50 kgf/mm2 or lower and its thickness is 15 to 30 μm.

    摘要翻译： 提供一种色散补偿光纤，如果在小卷轴上卷绕并具有稳定的温度特性，则不会导致损耗增加，其中，在波长范围内。 形成色散补偿光纤，使得在至少1.53〜1.63μm之间的波长下，弯曲直径为20mm的弯曲损耗为5dB / m以下，波长色散为-120ps / nm / km以下，使用条件下的截止波长为1.53μm以下，包层的外径为80〜100μm，涂层的外径为160〜200μm，表面的粘度 涂布树脂为10gf / mm以下。 b / a设定为1.5〜3.5，c / b为1.2〜2.0，芯的半径为4〜8μm，Delta1为+ 1.6％〜+ 2.6％，Δ2为-0.30％〜-1.4 ％，Delta3为-0.30％〜+ 1.0％。 第一涂层的杨氏模量为0.15kgf / mm 2以下，厚度为20〜30μm。 第二涂层的杨氏模量为50kgf / mm 2以下，其厚度为15〜30μm。

    Dispersion compensating optical fiber
    6.
    发明申请
    Dispersion compensating optical fiber 有权
    色散补偿光纤

    公开(公告)号：US20050249471A1

    公开(公告)日：2005-11-10

    申请号：US10507078

    申请日：2003-03-13

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

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

    IPC分类号： G02B6/036 ,  G02B1/00 ,  G02B6/02 ,  G02B6/44 ,  G02B6/22

    CPC分类号： G02B6/03644 ,  G02B6/02261 ,  G02B6/02395 ,  G02B6/0281 ,  G02B6/03627

    摘要： A dispersion-compensated optical fiber which does not cause an increase in a loss if it is wound in a small reel and has a stable temperature characteristics is provided. A dispersion-compensated optical fiber is formed such that, in at least a wavelength between 1.53 to 1.63 μm, a bending loss of 20 mm bending diameter is 5 dB/m or lower, a wavelength dispersion is −120 ps/nm/km or lower, a cut-off wavelength under a usage condition is 1.53 μm or lower, an outer diameter of the cladding is 80 to 100 μm, an outer diameter of a coating is 160 to 200 μm, a viscosity of a surface of a coating resin is 10 gf/mm or lower. It is set such that b/a is 1.5 to 3.5, c/b is 1.2 to 2.0, a radius of a core is 4 to 8 μm, Δ1 is +1.6% to +2.6%, Δ2 is −0.30% to −1.4%, and Δ3 is −0.3 0% to +1.0%. Young's modulus of a first coating layer is 0.15 kgf/nun 2 or lower and its thickness is 20 to 30 μm. Young's modulus of a second coating layer is 50 kgf/mm2 or lower and its thickness is 15 to 30 μm.

    摘要翻译： 提供了一种弥散补偿光纤，如果卷绕在小卷轴中并且具有稳定的温度特性，则不会导致损耗增加。 形成色散补偿光纤，使得在至少1.53〜1.63μm之间的波长下，弯曲直径为20mm的弯曲损耗为5dB / m以下，波长色散为-120ps / nm / km， 较低的使用条件下的截止波长为1.53μm或更小，包层的外径为80至100μm，涂层的外径为160至200μm，涂层树脂的表面的粘度 为10gf / mm以下。 b / a设定为1.5〜3.5，c / b为1.2〜2.0，芯的半径为4〜8μm，Delta 1为+ 1.6％〜+ 2.6％，Δ2为-0.30％〜 -1.4％，Delta 3为-0.3±0％〜+ 1.0％。 第一涂层的杨氏模量为0.15kgf /次/秒以下，其厚度为20〜30μm。 第二涂层的杨氏模量为50kgf / mm 2以下，其厚度为15〜30μm。

    Optical transmission system
    7.
    发明授权
    Optical transmission system 失效
    光传输系统

    公开(公告)号：US06876803B2

    公开(公告)日：2005-04-05

    申请号：US10245661

    申请日：2002-09-17

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

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

    IPC分类号： G02B6/036 ,  G02B6/34 ,  H04B10/2525 ,  G02B6/16

    CPC分类号： G02B6/03644 ,  G02B6/02004 ,  G02B6/02261 ,  G02B6/0228 ,  G02B6/29377 ,  H04B10/25253

    摘要： The present invention provides an optical transmission system that enables high-speed transmission of 40 Gb/s with low residual dispersion while maintaining the yield of a dispersion compensating fiber. In the present invention, the dispersion compensating fiber is connected to each span of an optical fiber for transmission. One set of an optical transmission path is formed by this optical fiber for transmission and the dispersion compensating fiber, and this one set of optical transmission path is connected in multiple stages and connected to a transmitter and a receiver. By setting the conditions of dispersion compensation in each span comparatively leniently, managing the residual dispersion of each transmission span, and suitably arranging each transmission span, an optical transmission system is composed in which adequate dispersion compensation is performed over the entire optical transmission path.

    摘要翻译： 本发明提供了一种光传输系统，其能够在保持色散补偿光纤的产量的同时以低残余色散实现40Gb / s的高速传输。 在本发明中，色散补偿光纤连接到用于传输的光纤的每个跨度。 这种光传输路径由这种用于传输的光纤和色散补偿光纤形成，并且这一组光传输路径被多级连接并连接到发射机和接收机。 通过相对宽松地设置每个范围内的色散补偿条件，管理每个传输跨度的残余色散，并适当地布置每个传输跨度，组成了在整个光传输路径上执行适当的色散补偿的光传输系统。