利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

256 条记录 (耗时 0.032 秒)

    Optical fiber and optical transmission line and optical communication system including such optical fiber
    63.
    发明申请
    Optical fiber and optical transmission line and optical communication system including such optical fiber 有权
    光纤和光传输线以及包括这种光纤的光通信系统

    公开(公告)号：US20050157994A1

    公开(公告)日：2005-07-21

    申请号：US11022817

    申请日：2004-12-28

    申请人： Naomi Kumano

    发明人： Naomi Kumano

    IPC分类号： G02B6/34 ,  G02B6/16 ,  H01S3/00

    CPC分类号： G02B6/03688 ,  G02B6/02009 ,  G02B6/02028 ,  G02B6/02233 ,  G02B6/02238 ,  G02B6/02242 ,  G02B6/02271 ,  G02B6/02285 ,  G02B6/0281 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/03661 ,  G02B6/03677 ,  G02B6/29376 ,  H04B10/25253

    摘要： Optical fibers to form an optical transmission line suitable for WDM transmission in a wide-spreading wavelength band, having the following characteristics and parameters: a dispersion in absolute value of 0.5 ps/nm/km to 9 ps/nm/km in a wavelength band of 1430 nm to 1625 nm, a dispersion slope in absolute value of 0.04 ps/nm2/km or less at a wavelength of 1550 nm, a mode field diameter of 7 μm or less at a wavelength of 1550 nm and a cable cutoff wavelength of less than 1430 nm; core 11 surrounded by cladding 7, core 11 being at least two-layered (first layer 1 at the center and second layer 2 surrounding the first layer; relative refractive index of glass layer Δ1 with reference to the cladding being adjusted to not less than 0.6 but not more than 1.6%, relative refractive index of second layer Δ2 with reference to the cladding being adjusted to a negative value.

    摘要翻译： 用于形成适用于宽扩频波段中的WDM传输的光传输线的光纤，具有以下特性和参数：波长带中绝对值的偏差为0.5ps / nm / km至9ps / nm / km 为1430nm至1625nm，波长1550nm处的绝对值为0.04ps / nm 2 / km或更小的色散斜率，波长为10μm以下的模场直径为7μm以下 1550nm，电缆截止波长小于1430nm; 芯11由包层7包围，芯11为至少两层（中心为第一层1，围绕第一层的第二层2;玻璃层Delta1相对于包层的相对折射率调整为不小于0.6 但不超过1.6％，相对于包层将第二层Delta2的相对折射率调整为负值。

    Method for manufacturing low PMD single-mode fiber and optical fiber manufactured by the same
    66.
    发明申请
    Method for manufacturing low PMD single-mode fiber and optical fiber manufactured by the same 审中-公开
    制造低PMD单模光纤和光纤的方法

    公开(公告)号：US20040232571A1

    公开(公告)日：2004-11-25

    申请号：US10802660

    申请日：2004-03-17

    发明人： Weijun Tong ,  Zhenbao He ,  Shuqiang Zhang ,  Jie Luo

    IPC分类号： B29D011/00

    CPC分类号： C03B37/02745 ,  B29D11/00663 ,  C03B37/032 ,  C03B2203/19 ,  C03B2203/36 ,  C03B2205/06 ,  G02B6/02285

    摘要： The invention relates to a method for manufacturing low PMD single-mode fiber and a fiber manufactured by said method. The twisting system is mounted at the downstream side of a normal fiber-drawing tower. The manner of twisting does not change the fiber-drawing path, the axis of twisting wheels periodically swing in a plane which is parallel to the fiber-drawing direction. The fiber moving at high speed makes the outer surfaces of the twisting wheels to rotate round the axis of the fiber, when an angle between the plane in which the twisting wheels are located and the fiber-drawing direction exists, the component of the angular velocity in the radial direction of the fiber reacts on the fiber and makes the fiber to twist, and the twist propagates to the soften region of the glass material at the fiber-drawing upstream in the form of mechanical wave, a plastic deformation is produced and set up in the newly drawn fiber. The non-sinusoidal twist distribution of confused frequencies and amplitudes is introduced in the length direction of the fiber, and the energy coupling between the two orthogonal polarization modes is increased, the birefringence of said modes initiates PMD of the fiber. The PMD coefficient of the fiber manufactured by the method is less than 0.03 ps/km1/2.

    摘要翻译： 本发明涉及用于制造低PMD单模光纤的方法和通过所述方法制造的光纤。 扭转系统安装在正常的拉丝塔的下游侧。 扭转的方式不改变拉丝路径，扭转轴的轴线在与纤维拉伸方向平行的平面中周期性地摆动。 当高速运动的纤维使得扭转轮的外表面在纤维的轴线周围旋转，当扭转轮所在的平面与存在纤维拉伸方向之间的角度时，角速度的分量 纤维的径向在纤维上反应，使纤维扭曲，在机械波形的上游的纤维拉伸下，扭转传播到玻璃材料的软化区域，产生塑性变形 在新拉纤维中。 在纤维的长度方向上引入了混沌频率和幅度的非正弦扭曲分布，并且两个正交偏振模式之间的能量耦合增加，所述模式的双折射启动光纤的PMD。 通过该方法制造的纤维的PMD系数小于0.03ps / km 1/2。

    High capacity optical waveguide fiber
    67.
    发明授权
    High capacity optical waveguide fiber 失效
    大容量光波导光纤

    公开(公告)号：US06801699B1

    公开(公告)日：2004-10-05

    申请号：US10280534

    申请日：2002-10-25

    申请人： Scott R. Bickham ,  Phong Diep ,  Pamela A. Hajcak

    发明人： Scott R. Bickham ,  Phong Diep ,  Pamela A. Hajcak

    IPC分类号： G02B602

    CPC分类号： G02B6/03627 ,  G02B6/02019 ,  G02B6/02238 ,  G02B6/02285 ,  G02B6/0286 ,  G02B6/03611

    摘要： An optical waveguide fiber that simultaneously exhibits large effective area and good resistance to bend induced attenuation, as measured by any of the tests known in the art. The cut off wavelength is controlled to allow single mode operation over a wavelength range that extends from about 1340 nm to 1650 nm. The optical waveguide fiber refractive index profile is simple in design allowing cost effective manufacture.

    摘要翻译： 如通过本领域已知的任何测试所测量的，同时具有大的有效面积和良好的抗弯曲诱发衰减的光波导光纤。 控制截止波长以允许在从约1340nm延伸到1650nm的波长范围内进行单模操作。 光波导纤维的折射率分布图设计简单，可实现成本有效的制造。

    Method of making a spun optical fiber with low polarization mode dispersion
    68.
    发明申请
    Method of making a spun optical fiber with low polarization mode dispersion 有权
    制造具有低偏振模色散的纺丝光纤的方法

    公开(公告)号：US20040184751A1

    公开(公告)日：2004-09-23

    申请号：US10392652

    申请日：2003-03-20

    发明人： Xin Chen ,  Ming-Jun Li ,  Jesse C. Meyer ,  Oscar Palmer

    IPC分类号： G02B006/16

    CPC分类号： G02B6/02285 ,  C03B37/02745 ,  C03B37/032 ,  C03B2203/19 ,  C03B2203/20 ,  C03B2203/36 ,  C03B2205/06

    摘要： An optical fiber, and a method of making such optical fiber, wherein the optical fiber exhibits a beatlength greater than about 5 meters, and the fiber is spun to provide a polarization mode dispersion in the spun state of said fiber which is less than 0.05 ps/km1/2. The fiber is spun by employing a spin having a spin repeat distance of at least 10 meters. The spin preferably alternates between clockwise and counterclockwise directions.

    摘要翻译： 一种光纤，以及制造这种光纤的方法，其中光纤表现出大于约5米的拍子长度，并且纺丝纤维以在所述光纤的纺丝状态下提供小于0.05ps的偏振模色散 / km <1/2>。 通过采用具有至少10米的自旋重复距离的纺丝来纺丝纤维。 旋转优选地在顺时针和逆时针方向之间交替。

    Method for producing twisted optical fiber with reduced polarization mode dispersion
    69.
    发明申请
    Method for producing twisted optical fiber with reduced polarization mode dispersion 有权
    具有降低的偏振模色散的扭转光纤的制造方法

    公开(公告)号：US20040163418A1

    公开(公告)日：2004-08-26

    申请号：US10754904

    申请日：2004-01-09

    申请人： STERLITE OPTICAL TECHNOLOGIES LIMITED

    发明人： Sangeeta Mohanty ,  Nacham Sridhar ,  Salaj Sinha ,  Nitesh Gulati ,  Sthitadhi Das

    IPC分类号： C03B037/022 ,  C03B037/075

    CPC分类号： C03B37/032 ,  C03B37/02745 ,  C03B2203/19 ,  C03B2203/20 ,  C03B2203/36 ,  C03B2205/06 ,  C03B2205/42 ,  G02B6/02285

    摘要： A method for drawing an optical fiber having reduced polarization mode dispersion (PMD) draws an optical fiber from an optical fiber preform whose core ovality is at max about 3%, coats the optical fiber with acrylic polymer and twists the coated optical fiber with a pair of spinning wheels. The twisting of the fiber is achieved by four discrete spin rates that repeat in a periodic fashion after the drawing of certain lengths of the optical fiber. At least one of the spin rates varies in a trapezoidal manner along the respective one of drawn lengths of the optical fiber.

    摘要翻译： 用于绘制具有降低的偏振模色散（PMD）的光纤的方法从其核心椭圆度为最大约3％的光纤预制棒拉制光纤，用丙烯酸聚合物涂覆光纤并用一对扭曲涂覆的光纤 的旋转轮。 纤维的扭曲是通过在拉伸一定长度的光纤之后以周期性方式重复的四种离散旋转速率实现的。 旋转速率中的至少一个沿着光纤的拉伸长度的相应的一个梯形方式变化。