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    Optical fiber and optical transmission path that uses the optical fiber
    2.
    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
    6.
    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。

    Optical fiber and transmission system, and wavelength division multiplexing system
    7.
    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 TRANSMISSION SYSTEM, AND WAVELENGTH DIVISION MULTIPLEXING SYSTEM
    9.
    发明申请
    OPTICAL FIBER AND TRANSMISSION SYSTEM, AND WAVELENGTH DIVISION MULTIPLEXING SYSTEM 有权
    光纤和传输系统，以及波长分割多路复用系统

    公开(公告)号：US20070189699A1

    公开(公告)日：2007-08-16

    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 a dope amount of the fluorine is smaller than a dope amount of the 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，其中掺杂量的氟小于共掺层中的氟的掺杂量。