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    Method and apparatus for the evaluation of polarization mode dispersion in optical fibers
    3.
    发明申请
    Method and apparatus for the evaluation of polarization mode dispersion in optical fibers 有权
    用于评估光纤中偏振模色散的方法和装置

    公开(公告)号：US20070189656A1

    公开(公告)日：2007-08-16

    申请号：US10572203

    申请日：2004-09-14

    申请人： Davide Sarchi ,  Martino Travagnin ,  Alexis Debut

    发明人： Davide Sarchi ,  Martino Travagnin ,  Alexis Debut

    IPC分类号： G02B6/00

    CPC分类号： G01M11/336 ,  G01M11/088 ,  G01M11/331 ,  G01M11/335 ,  H04B10/2569

    摘要： A method of evaluating the Polarization Mode Dispersion (PMD) of an optical fiber by arranging the optical fiber at substantially zero tension on a surface, propagating prescribed evaluation optical signals along the optical fiber, measuring fiber Differential Group Delay (DGD) values in response to the evaluation optical signals, repeating at least once the acts of propagating and measuring, each time preliminarily inducing a change in a mode coupling of the fiber, and determining the fiber PMD on the basis of a calculated DGD average value. Changes in the polarization mode coupling of the fiber are induced by, moving at least a section of the fiber substantially orthogonally to the surface. An improved PMD evaluation apparatus includes a fiber arrangement surface adapted to have a fiber under test arranged thereon at substantially zero tension, and, operatively associated with the fiber arrangement surface, a fiber moving device activatable for moving the at least a section of the fiber substantially orthogonally to the fiber arrangement surface.

    摘要翻译： 一种通过将光纤布置在表面上基本为零张力的光纤来评估光纤的偏振模色散（PMD）的方法，沿着光纤传播规定的评估光信号，响应于光纤的差分组延迟（DGD）值 评估光信号，每次重复至少一次传播和测量的动作，每次预先引起光纤的模式耦合的改变，并且基于所计算的DGD平均值来确定光纤PMD。 纤维的偏振模式耦合的变化是通过将纤维的至少一部分基本上垂直于表面移动而引起的。 一种改进的PMD评估装置包括纤维布置表面，该纤维布置表面适于具有基本上零张力的被测试纤维，并且与纤维布置表面可操作地相关联;纤维移动装置，其可激活以基本上移动纤维的至少一部分 与纤维布置表面正交。

    Optical fiber having a low polarization mode dispersion and process and apparatus for producing it
    4.
    发明授权
    Optical fiber having a low polarization mode dispersion and process and apparatus for producing it 失效
    具有低偏振模色散的光纤及其制造方法和装置

    公开(公告)号：US07409126B2

    公开(公告)日：2008-08-05

    申请号：US10528836

    申请日：2003-09-22

    申请人： Giacomo Stefano Roba ,  Davide Sarchi ,  Martino Travagnin ,  Alexis Debut

    发明人： Giacomo Stefano Roba ,  Davide Sarchi ,  Martino Travagnin ,  Alexis Debut

    IPC分类号： G02B6/44

    CPC分类号： B65H49/02 ,  C03B37/02745 ,  C03B37/032 ,  C03B37/12 ,  C03B2203/19 ,  C03B2203/20 ,  C03B2203/36 ,  C03B2205/06 ,  G02B6/02285

    摘要： An apparatus for producing a low-PMD optical fiber having a furnace for melting a lower portion of an optical preform; a traction device for pulling an optical fiber from the lower portion of an optical preform; a spinning device for imparting a substantially constant and unidirectional spin to the optical fiber as it is pulled, which causes the fiber to undergo an elastic torsion; a winding device for winding the optical fiber onto a reel; and a twisting device for imparting to the spun optical fiber a unidirectional twist in a direction opposite the elastic torsion, so as to control the residual twist in the optical fiber. A process for producing the fiber, an optical fiber and a cable are also provided.

    摘要翻译： 一种用于生产具有用于熔化光学预型件的下部的炉的低PMD光纤的设备; 用于从光学预型件的下部拉动光纤的牵引装置; 旋转装置，用于在被拉动时使光纤基本上恒定且单向旋转，这导致纤维经受弹性扭转; 用于将光纤缠绕到卷轴上的卷绕装置; 以及用于使纺丝光纤沿与弹性扭转相反的方向赋予单向捻度的扭转装置，以便控制光纤中的残余扭曲。 还提供了用于生产纤维，光纤和电缆的方法。

    Method and apparatus for the evaluation of polarization mode dispersion in optical fibers
    5.
    发明授权
    Method and apparatus for the evaluation of polarization mode dispersion in optical fibers 有权
    用于评估光纤中偏振模色散的方法和装置

    公开(公告)号：US07768630B2

    公开(公告)日：2010-08-03

    申请号：US10572203

    申请日：2004-09-14

    申请人： Davide Sarchi ,  Martino Travagnin ,  Alexis Debut

    发明人： Davide Sarchi ,  Martino Travagnin ,  Alexis Debut

    IPC分类号： G01N21/00

    CPC分类号： G01M11/336 ,  G01M11/088 ,  G01M11/331 ,  G01M11/335 ,  H04B10/2569

    摘要： A method of evaluating the Polarization Mode Dispersion (PMD) of an optical fiber by arranging the optical fiber at substantially zero tension on a surface, propagating prescribed evaluation optical signals along the optical fiber, measuring fiber Differential Group Delay (DGD) values in response to the evaluation optical signals, repeating at least once the acts of propagating and measuring, each time preliminarily inducing a change in a mode coupling of the fiber, and determining the fiber PMD on the basis of a calculated DGD average value. Changes in the polarization mode coupling of the fiber are induced by, moving at least a section of the fiber substantially orthogonally to the surface. An improved PMD evaluation apparatus includes a fiber arrangement surface adapted to have a fiber under test arranged thereon at substantially zero tension, and, operatively associated with the fiber arrangement surface, a fiber moving device activatable for moving the at least a section of the fiber substantially orthogonally to the fiber arrangement surface.

    摘要翻译： 一种通过将光纤布置在表面上基本为零张力的光纤来评估光纤的偏振模色散（PMD）的方法，沿着光纤传播规定的评估光信号，响应于光纤的差分组延迟（DGD）值 评估光信号，每次重复至少一次传播和测量的动作，每次预先引起光纤的模式耦合的改变，并且基于所计算的DGD平均值来确定光纤PMD。 纤维的偏振模式耦合的变化是通过将纤维的至少一部分基本上垂直于表面移动而引起的。 一种改进的PMD评估装置包括纤维布置表面，该纤维布置表面适于具有基本上零张力的被测试纤维，并且与纤维布置表面可操作地相关联;纤维移动装置，其可激活以基本上移动纤维的至少一部分 与纤维布置表面正交。

    Optical fiber having a low polarization mode dispersion and process and apparatus for producing it
    6.
    发明申请
    Optical fiber having a low polarization mode dispersion and process and apparatus for producing it 失效
    具有低偏振模色散的光纤及其制造方法和装置

    公开(公告)号：US20060147166A1

    公开(公告)日：2006-07-06

    申请号：US10528836

    申请日：2003-09-22

    申请人： Giacomo Roba ,  Davide Sarchi ,  Martino Travagnin ,  Alexis Debut

    发明人： Giacomo Roba ,  Davide Sarchi ,  Martino Travagnin ,  Alexis Debut

    IPC分类号： G02B6/02

    CPC分类号： B65H49/02 ,  C03B37/02745 ,  C03B37/032 ,  C03B37/12 ,  C03B2203/19 ,  C03B2203/20 ,  C03B2203/36 ,  C03B2205/06 ,  G02B6/02285

    摘要： An apparatus for producing a low-PMD optical fiber having a furnace for melting a lower portion of an optical preform; a traction device for pulling an optical fiber from the lower portion of an optical preform; a spinning device for imparting a substantially constant and unidirectional spin to the optical fiber as it is pulled, which causes the fiber to undergo an elastic torsion; a winding device for winding the optical fiber onto a reel; and a twisting device for imparting to the spun optical fiber a unidirectional twist in a direction opposite the elastic torsion, so as to control the residual twist in the optical fiber. A process for producing the fiber, an optical fiber and a cable are also provided.

    摘要翻译： 一种用于生产具有用于熔化光学预型件的下部的炉的低PMD光纤的设备; 用于从光学预型件的下部拉动光纤的牵引装置; 旋转装置，用于在被拉动时使光纤基本上恒定且单向旋转，这导致纤维经受弹性扭转; 用于将光纤缠绕到卷轴上的卷绕装置; 以及用于使纺丝光纤沿与弹性扭转相反的方向施加单向捻度的扭转装置，以控制光纤中的残余扭曲。 还提供了用于生产纤维，光纤和电缆的方法。

    Microstructured optical fibre
    10.
    发明申请
    Microstructured optical fibre 失效
    微结构光纤

    公开(公告)号：US20060239627A1

    公开(公告)日：2006-10-26

    申请号：US10550463

    申请日：2003-03-31

    申请人： Alfredo Gambirasio ,  Francesco Tassone ,  Martino Travagnin

    发明人： Alfredo Gambirasio ,  Francesco Tassone ,  Martino Travagnin

    IPC分类号： G02B6/02

    CPC分类号： G02B6/02333 ,  C03B37/01205 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2203/14 ,  C03B2203/42 ,  G02B6/02014 ,  G02B6/02242 ,  G02B6/02266 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/02366

    摘要： A microstructured optical fibre has a core region with a material having a refractive index nco and a microstructured region surrounding the core region with a background material having a refractive index nm which is lower than the refractive index nco. The microstructured region has a plurality of microstructures having a refractive index different from the refractive index nm, wherein the distance Δφ between the centers of any couple of adjacent microstructures is at least equal to about λp and not higher than about 1.5λp, wherein λp is the spatial variation length of the electric field intensity in the microstructured region.

    摘要翻译： 微结构光纤具有具有折射率为n＆gt; co＆gt;的材料的芯区域和围绕芯区域的微结构化区域，其背景材料具有折射率n m 低于折射率n Co 。 微结构化区域具有折射率不同于折射率n m m的多个微结构，其中任何几个相邻的微结构的中心之间的距离ΔΦi位于 最小等于大约λλ，并且不高于约1.5λλ，其中λ是电场强度的空间变化长度 微结构区域。