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    Optical fiber and transmission system, and wavelength division multiplexing system
    2.
    发明授权
    Optical fiber and transmission system, and wavelength division multiplexing system 有权
    光纤和传输系统以及波分复用系统

    公开(公告)号：US07606460B2

    公开(公告)日：2009-10-20

    申请号：US11738275

    申请日：2007-04-20

    申请人： Shoichiro Matsuo ,  Shoji Tanigawa ,  Kuniharu Himeno

    发明人： Shoichiro Matsuo ,  Shoji Tanigawa ,  Kuniharu Himeno

    IPC分类号： G02B6/00

    CPC分类号： G02B6/03611 ,  G02B6/03627 ,  G02B6/03633 ,  G02B6/03644 ,  G02B6/0365

    摘要： An optical fiber comprises a center core and a cladding located at an outer periphery of the core, wherein the core comprises at least one codoped layer made from silica glass doped with germanium and fluorine, and at least one lower-concentration codoped layer made from silica glass doped with germanium, or silica glass that is doped with germanium and fluorine wherein an amount of fluorine in the lower-concentration codoped layer is smaller than an amount of fluorine in the codoped layer.

    摘要翻译： 光纤包括位于芯的外周的中心芯和包层，其中芯包括由掺杂有锗和氟的二氧化硅玻璃制成的至少一个共掺层，以及由二氧化硅制成的至少一个低浓度共掺层 掺杂有锗的玻璃或掺杂有锗和氟的二氧化硅玻璃，其中低浓度掺杂层中的氟的量小于共掺层中的氟的量。

    Optical fiber and optical transmission path that uses the optical fiber
    6.
    发明授权
    Optical fiber and optical transmission path that uses the optical fiber 失效
    使用光纤的光纤和光传输路径

    公开(公告)号：US06928211B2

    公开(公告)日：2005-08-09

    申请号：US10636552

    申请日：2003-08-08

    申请人： Shoji Tanigawa ,  Shoichiro Matsuo ,  Kuniharu Himeno

    发明人： Shoji Tanigawa ,  Shoichiro Matsuo ,  Kuniharu Himeno

    IPC分类号： G02B6/036 ,  G02B6/02

    CPC分类号： G02B6/02271 ,  G02B6/02 ,  G02B6/02014 ,  G02B6/03611

    摘要： There is provided at low cost an optical fiber suitable for wavelength division multiplex transmissions that has strengthened the tolerance to bending loss at even smaller bending diameters. The present invention is an optical fiber whose base material is silica glass and that has a two layer structure formed by a core that has a substantially uniform refractive index and by a cladding that is located outside the core and that has a substantially uniform refractive index, wherein the optical fiber satisfies the following conditions (1) to (3): (1) an outer diameter of the core is in a range of 4 to 8 μm, and a relative refractive index difference of the core is in a range of 0.4 to 0.8%; (2) chromatic dispersion at a wavelength of 1550 nm is in a range of 2 to 15 ps/nm/km; and (3) effective area at a wavelength of 1550 nm is 40 μm2 or more.

    摘要翻译： 以低成本提供了适用于波分复用传输的光纤，其在更小的弯曲直径下增强了对弯曲损耗的公差。 本发明是一种基材为石英玻璃的光纤，其具有由具有基本上均匀的折射率的芯构成的两层结构，以及位于芯外部并具有基本上均匀的折射率的包层， 其中光纤满足以下条件（1）至（3）：（1）芯的外径在4至8μm的范围内，并且芯的相对折射率差在0.4的范围内 至0.8％; （2）波长1550nm的色散在2〜15ps / nm / km的范围内; 和（3）1550nm波长的有效面积为40μm以上。

    Optical fiber and optical transmission path
    9.
    发明授权
    Optical fiber and optical transmission path 有权
    光纤和光传输路径

    公开(公告)号：US07062136B2

    公开(公告)日：2006-06-13

    申请号：US10440263

    申请日：2003-05-19

    申请人： Shoji Tanigawa ,  Shoichiro Matsuo ,  Kuniharu Himeno ,  Koichi Harada

    发明人： Shoji Tanigawa ,  Shoichiro Matsuo ,  Kuniharu Himeno ,  Koichi Harada

    IPC分类号： G02B6/22

    CPC分类号： G02B6/03694 ,  G02B6/02247 ,  G02B6/02285 ,  G02B6/03611 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/03666 ,  G02B6/29377

    摘要： Under condition that a non-circularity ratio is 5% or lower and a thermal expansion coefficient of a glass which forms the core is α1 and a thermal expansion of a glass which forms the cladding is α2, the difference of coefficients is controlled such that a formula −2.5×10−7/° C.≦α1 −α2≦1.0×10−7/° C. is satisfied so as to maintain a polarization mode dispersion to be 0.03 ps/km0.5 or lower. The difference of coefficients is further controlled such that a formula −1.5×10−7/° C.≦α1−α2≦0/° C. is satisfied so as to maintain a polarization mode dispersion to be 0.015 ps/km0.5 or lower. By doing this, birefringence is reduced by adjusting the thermal expansion coefficient in a core and a cladding; thus providing an optical fiber, and an optical transmission path using the optical fiber, having preferable PMD for high speed transmission.

    摘要翻译： 在非圆度比为5％以下，形成芯的玻璃的热膨胀系数为α1，形成包层的玻璃的热膨胀为α2的条件下，将系数差控制为 满足公式-2.5×10 -7 /℃。<=α1 -al 2≤1.0×10 -7 -7℃/℃以保持极化 模式色散为0.03ps / km <0.5或更低。 进一步控制系数的差异，使得满足式-1.5×10 -7 /℃。=α1-α2 <= 0 /℃，以便保持偏振模色散 为0.015ps / km以下0.5以下。 通过这样做，通过调节芯和包层中的热膨胀系数来减少双折射; 从而提供一种光纤，以及使用该光纤的光传输路径，具有优选用于高速传输的PMD。

    Single-mode optical fiber, optical fiber cable, optical fiber cord, and method for ensuring service life of optical fiber
    10.
    发明申请
    Single-mode optical fiber, optical fiber cable, optical fiber cord, and method for ensuring service life of optical fiber 审中-公开
    单模光纤，光缆，光纤线，以及确保光纤使用寿命的方法

    公开(公告)号：US20060115224A1

    公开(公告)日：2006-06-01

    申请号：US11287284

    申请日：2005-11-28

    申请人： Hiroshi Kutami ,  Shoichiro Matsuo ,  Kuniharu Himeno

    发明人： Hiroshi Kutami ,  Shoichiro Matsuo ,  Kuniharu Himeno

    IPC分类号： G02B6/02

    CPC分类号： G02B6/0365 ,  G02B6/02

    摘要： A single-mode optical fiber, cable, cord, and a method for ensuring a service life of the fiber are provided. The fiber has a core and a cladding, the fiber having a cut-off wavelength that exhibits a single-mode transmission in a 1.31 μm wavelength band. A relative refractive index difference of the core with respect to the cladding is adjusted such that a bending loss, when a bend is applied in a radius smaller than a limit bending radius of the fiber, becomes greater than a detection limit value. The limit bending radius is calculated from a relationship between a bending radius applied to the optical fiber and a failure probability which occurs after a time period. The method includes measuring a loss and ensuring that a failure probability of the fiber during a service life falls within a failure probability used for setting the limit bending radius.

    摘要翻译： 提供单模光纤，电缆，电线以及确保光纤使用寿命的方法。 光纤具有芯和包层，光纤具有在1.31μm波长带中呈现单模传输的截止波长。 调整芯相对于包层的相对折射率差，使得当以小于光纤的极限弯曲半径的半径施加弯曲时的弯曲损耗变得大于检测极限值。 极限弯曲半径由施加到光纤的弯曲半径与时间之后发生的故障概率之间的关系计算。 该方法包括测量损耗并确保光纤在使用寿命期间的故障概率落在用于设置极限弯曲半径的故障概率内。