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    Dispersion shifted optical fiber
    1.
    发明公开
    Dispersion shifted optical fiber 有权
    分散剂选择Faser

    公开(公告)号：EP0909964A1

    公开(公告)日：1999-04-21

    申请号：EP98308304.9

    申请日：1998-10-13

    申请人： FUJIKURA LTD.

    发明人： Matsuo, Shoichiro ,  Horikoshi, Masahiro

    IPC分类号： G02B6/16 ,  G02B6/22

    CPC分类号： G02B6/02009 ,  G02B6/02242 ,  G02B6/03666

    摘要： A dispersion-shifted optical fiber (DS-fiber) is structured so that it has nearly zero chromatic dispersion in the 1.55 µm wavelength band and, at the same time, achieves both reduced non linear effects and low dispersion slope. In particular, dispersion slope is reduced to a level sufficient for the fiber to be used for wavelength division multiplexing (WDM) applications. The properties of the fiber are developed such that chromatic dispersion in the 1.55 µm band is nearly zero but not zero, effective cross section area is 45∼70 µm 2 , bending loss is 0.1∼100 dB/m, dispersion slope is 0.05∼0.08 ps/km/nm 2 , and the cutoff wavelength is such that transmission is always single-mode transmission within the 1.55 µm band. Such a DS-fiber has sufficiently large effective cross section area Aeff, low bending loss and small dispersion slope to make the fiber suitable for use in WDM transmission systems.

    摘要翻译： 色散位移光纤（DS-fiber）被构造为使其在1.55μm波长带中几乎为零的色散，同时实现了减少的非线性效应和低色散斜率。 特别地，色散斜率降低到足以使光纤用于波分复用（WDM）应用的水平。 纤维的性质被开发成使得1.55μm带中的色散几乎为零但不为零，有效截面积为45〜70μm2，弯曲损耗为0.1〜100dB / m，色散斜率 为0.05-3.0μs/ km / nm 2，截止波长为1.55μm波段内传输总是单模传输。 这种DS纤维具有足够大的有效截面面积Aeff，低弯曲损耗和小的色散斜率，以使光纤适用于WDM传输系统。

    Optical fiber and optical transmission path
    5.
    发明公开
    Optical fiber and optical transmission path 审中-公开
    光纤和光传输路径

    公开(公告)号：EP1857844A3

    公开(公告)日：2010-09-01

    申请号：EP07115956.0

    申请日：2003-05-15

    申请人： FUJIKURA LTD.

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

    IPC分类号： G02B6/036

    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/km 0.5 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/km 0.5 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.

    OPTICAL FIBER AND METHOD OF MEASURING POLARIZATION MODE DIFFUSION FOR OPTICAL FIBER
    8.
    发明公开
    OPTICAL FIBER AND METHOD OF MEASURING POLARIZATION MODE DIFFUSION FOR OPTICAL FIBER 审中-公开
    OPTISCHE FASER UND VERFAHREN ZUR MESSUNG DER POLARISATIONSMODEN-DIFFUSIONFÜROPTISCHE FASER

    公开(公告)号：EP1698919A1

    公开(公告)日：2006-09-06

    申请号：EP04792774.4

    申请日：2004-10-21

    申请人： FUJIKURA LTD.

    发明人： Goto, Ryuichiro ,  Tanigawa, Shoji ,  Matsuo, Shoichiro ,  Himeno, Kuniharu

    IPC分类号： G02B6/02

    CPC分类号： G02B6/02285 ,  G01M11/3181

    摘要： A method of measuring polarization mode dispersion of an optical fiber, includes estimating polarization mode dispersion when an optical fiber is formed as an optical cable, from a beat length when the optical fiber is wound around a bobbin, and an average coupling length when the optical fiber is formed as the optical cable.

    摘要翻译： 一种测量光纤的偏振模色散的方法，包括当光纤缠绕在绕线管上时，从形成光纤作为光缆的偏振模色散，以及当光纤缠绕在线轴上时的平均耦合长度 光纤形成为光缆。

    Optical fiber and optical transmission path
    10.
    发明公开
    Optical fiber and optical transmission path 审中-公开
    Glasfaser undÜbertragungsstrecke

    公开(公告)号：EP1363146A2

    公开(公告)日：2003-11-19

    申请号：EP03291137.2

    申请日：2003-05-15

    申请人： FUJIKURA LTD.

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

    IPC分类号： G02B6/16

    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 α 1 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-α 2 ≤ 1.0×10 -7 /°C is satisfied so as to maintain a polarization mode dispersion to be 0.03 ps/km 0.5 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/km 0.5 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-α2≤1.0×10-7 /℃，以将偏振模色散维持在0.03ps / km <0.5>或更低 。 进一步控制系数差，使得满足公式-1.5×10 -7 /℃≤α1-α2≤0/℃，以将偏振模色散维持为0.015ps / km <0.5 >或更低。 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; 从而提供光纤和使用该光纤的光传输路径，其具有用于高速传输的优选PMD。