Method of measuring the twist imparted to an optical fibre and procedure for processing an optical fibre using this method
    21.
    发明授权
    Method of measuring the twist imparted to an optical fibre and procedure for processing an optical fibre using this method 有权
    使用该方法测量赋予光纤的捻度的方法和处理光纤的步骤

    公开(公告)号:US06837074B2

    公开(公告)日:2005-01-04

    申请号:US10133359

    申请日:2002-04-29

    摘要: A method of measuring the twist imparted to an optical fibre includes the steps of advancing the optical fibre in a predetermined direction and at a predetermined velocity, imparting to the optical fibre, during the step of advancing, a twist about its axis, measuring the diameter of the optical fibre during the step of advancing, to generate a time-based signal indicating the diameter, and processing this signal to find a value indicating the imparted twist. The step of processing includes the principal steps of transforming in the frequency domain the signal relating to the measurement of the diameter, calculating the power spectrum of the signal thus obtained, distinguishing in this power spectrum the signal peaks correlated with the imparted twist, determining the maximum frequency associated with these signal peaks, and dividing the value of this maximum frequency by the value of the velocity of advance of the fibre to find the value indicating the imparted twist.

    摘要翻译: 测量赋予光纤的扭曲的方法包括以下步骤:使光纤在预定的方向上以预定的速度前进,在前进步骤期间,使光纤在其轴线上扭转,测量直径 以产生指示直径的基于时间的信号,并且处理该信号以找到指示所施加的扭曲的值。 处理步骤包括在频域中变换与直径测量相关的信号的主要步骤,计算由此获得的信号的功率谱,在该功率谱中区分与被赋予的扭曲相关的信号峰值,确定 与这些信号峰值相关联的最大频率,并且将该最大频率的值除以光纤的前进速度的值,以找到指示所施加的扭曲的值。

    Telecommunication Cable Equipped with Microstructured Optical Fibres
    22.
    发明申请
    Telecommunication Cable Equipped with Microstructured Optical Fibres 有权
    配有微结构光纤的电信电缆

    公开(公告)号:US20110170836A1

    公开(公告)日:2011-07-14

    申请号:US12226901

    申请日:2008-09-19

    IPC分类号: G02B6/44 G02B6/02

    摘要: Telecommunication cable comprising at least one microstructured optical fibre comprising a core region and a cladding region surrounding the core region, the cladding region comprising an annular void-containing region comprised of randomly arranged voids, the core region including doped silica to provide a positive refractive index relative to pure silica; and at least one protecting layer provided around said optical fibre, the protecting layer being made of a polymeric material having a low ultimate elongation.

    摘要翻译: 电信电缆包括至少一个微结构化光纤,其包括芯区域和围绕芯区域的包层区域,所述包层区域包括由随机排列的空隙组成的环形空隙容纳区域,所述芯区域包括掺杂二氧化硅以提供正折射率 相对于纯二氧化硅; 以及设置在所述光纤周围的至少一个保护层,所述保护层由具有低极限伸长率的聚合材料制成。

    Method for producing an optical fiber having low polarization mode dispersion
    23.
    发明申请
    Method for producing an optical fiber having low polarization mode dispersion 有权
    具有低偏振模色散的光纤的制造方法

    公开(公告)号:US20060230791A1

    公开(公告)日:2006-10-19

    申请号:US10541031

    申请日:2002-12-30

    IPC分类号: C03B37/07 G01N21/00

    摘要: A method for producing an optical fiber having low polarization mode dispersion, by the steps of a) providing an optical fiber perform of glass material; b) heating the glass material of an end portion of the optical fiber perform; c) drawing the heated glass material at a drawing speed V to form an optical fiber, the drawn glass material having a viscous zone; and d) applying to the optical fiber a substantially sinusoidal spin, which is transmitted to the viscous zone, the spin function frequency ν , the viscous zone length L and the drawing speed V being such that both a torsion and at least a 50% detorsion are applied to the viscous zone.

    摘要翻译: 一种通过以下步骤制造具有低偏振模色散的光纤的方法:a)提供玻璃材料的光纤性能; b)加热光纤端部的玻璃材料; c)以拉伸速度V拉制加热的玻璃材料以形成光纤,拉制的玻璃材料具有粘性区域; 以及d)向光纤施加基本上正弦的旋转,其传递到粘性区,旋转函数频率nu,粘性区长度L和拉伸速度V使得扭转和至少50% 被施加到粘性区域。

    Method for producing a coated optical fiber with reduced polarization mode dispersion
    24.
    发明授权
    Method for producing a coated optical fiber with reduced polarization mode dispersion 有权
    降低偏振模色散的涂覆光纤的制造方法

    公开(公告)号:US06327876B1

    公开(公告)日:2001-12-11

    申请号:US09636051

    申请日:2000-08-10

    IPC分类号: C03C2502

    摘要: An apparatus and method for forming a optical fiber (102) which includes a furnace (104) for softening an optical fiber blank (106); a tractor (114) for drawing the optical fiber (102) from the softened optical fiber blank (106); and a first applicator (110) for applying a coating of a first coating material to the optical fiber (102), the first applicator having a rotatable die.

    摘要翻译: 一种用于形成光纤(102)的装置和方法,包括用于软化光纤坯料(106)的炉(104); 用于从软化的光纤坯料(106)拉出光纤(102)的拖拉机(114); 以及用于将第一涂层材料的涂层施加到所述光纤(102)的第一施加器(110),所述第一施加器具有可旋转的模具。