POLARIZED LIGHTWAVE REFLECTOMETRY METHOD (POTDR)
    42.
    发明申请
    POLARIZED LIGHTWAVE REFLECTOMETRY METHOD (POTDR) 有权
    极化反射光谱法(POTDR)

    公开(公告)号:US20060285105A1

    公开(公告)日:2006-12-21

    申请号:US11467992

    申请日:2006-08-29

    IPC分类号: G01N21/00

    CPC分类号: G01M11/3181

    摘要: A polarized lightwave reflectometry method including the steps of sending at least two polarized light signals into the optical fiber to be tested, the signals presenting a determined angular offset relative to each other so that the polarization mode dispersion coefficient remains independent of any rotation of polarization in the optical fiber under test; extracting a scalar parameter of the relative noise type for each trace obtained by back-scattering of the light signal; and estimating the polarization mode dispersion coefficient by a function having a single scalar input, which function is of the type based on exponentials and has the form exp (a+bP+cP−1).

    摘要翻译: 一种偏振光波反射测量方法,包括以下步骤:将至少两个偏振光信号发送到要测试的光纤中,所述信号相对于彼此呈现确定的角度偏移,使得偏振模色散系数保持独立于任何偏振旋转 被测光纤; 提取通过光信号的反向散射获得的每个迹线的相对噪声类型的标量参数; 并且通过具有单个标量输入的函数来估计偏振模色散系数,该函数是基于指数的类型,并且具有形式exp(a + bP + cP -1)。

    Method of purifying natural or synthetic silica, and application thereof to depositing purified natural or synthetic silica on an optical fiber preform
    43.
    发明授权
    Method of purifying natural or synthetic silica, and application thereof to depositing purified natural or synthetic silica on an optical fiber preform 失效
    纯化天然或合成二氧化硅的方法及其在光纤预型体上沉积纯化天然或合成二氧化硅的应用

    公开(公告)号:US06631628B2

    公开(公告)日:2003-10-14

    申请号:US10247616

    申请日:2002-09-20

    IPC分类号: C03B3718

    摘要: Natural or synthetic silica is deposited on a preform set into rotation in front of a plasma torch which moves back and forth substantially parallel to a longitudinal direction of the preform, a first feed duct feeds the plasma with grains of natural or synthetic silica while a second feed duct feeds the plasma with a fluorine or chlorine compound, preferably a fluorine compound, mixed with a carrier gas. Any sodium or lithium contained in the grains of natural or synthetic silica react with the fluorine or chlorine of the fluorine or chlorine compound, thereby making it possible to improve the optical quality of fibers drawn from a preform built up with natural or synthetic silica, and to do so at reduced cost.

    摘要翻译: 将天然或合成二氧化硅沉积在等离子体焰炬的前面的预制件上,所述等离子体焰炬基本上平行于预成型件的纵向方向前后移动,第一进料管将天然或合成二氧化硅颗粒供给等离子体,而第二 进料管用与载气混合的氟或氯化合物,优选氟化合物来供给等离子体。 天然或合成二氧化硅颗粒中所含的任何钠或锂与氟或氯化合物的氟或氯反应,从而可以提高由天然或合成二氧化硅构成的预成型体所拉伸的纤维的光学品质, 以降低成本进行。