Method of purifying natural or synthetic silica, and application thereof to depositing purified natural or synthetic silica on an optical fiber preform
    41.
    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。

    Method for automatic centering of an optical fiber within a primary
protective cladding and a device employed for carrying out said method
    43.
    发明授权
    Method for automatic centering of an optical fiber within a primary protective cladding and a device employed for carrying out said method 失效
    用于在主保护包层内的光纤自动居中的方法和用于执行所述方法的装置

    公开(公告)号:US4321072A

    公开(公告)日:1982-03-23

    申请号:US206830

    申请日:1980-11-14

    CPC分类号: C03C25/12 C03C25/18

    摘要: Highly accurate centering of an optical fiber within a primary cladding deposited by a coating device is carried out by automatic regulation during the fiber-drawing process in order to optimize the mechanical properties of the fiber. The position of the coating device is controlled in dependence on the position of the fiber with respect to an origin of coordinates (O) determined by optoelectronic means. The frusto-conical lower end of the coating die is maintained at each instant by electronic and electromechanical means at the point (O') located at this level on the straight-line segment (OR) which joins the origin to the first point of contact of the fiber with the pulley used for guiding the fiber towards a storage drum.

    摘要翻译: 通过在纤维拉伸工艺期间的自动调节,通过涂覆装置沉积的初级包层内的光纤的高精度对中来进行,以优化纤维的机械性能。 涂层装置的位置根据光纤相对于由光电装置确定的坐标原点(O)的位置来控制。 涂层模具的截头圆锥形下端通过电子和机电装置在位于在原点连接到第一接触点的直线段(OR)处的该位置处的点(O')处被保持在每一时刻 的纤维与用于将纤维引向储存鼓的滑轮。

    Process and apparatus for controlling the drawing of an optical fibre
from a glass preform
    44.
    发明授权
    Process and apparatus for controlling the drawing of an optical fibre from a glass preform 失效
    用于控制来自玻璃预制件的光纤拉丝的工艺和设备

    公开(公告)号:US4317666A

    公开(公告)日:1982-03-02

    申请号:US183649

    申请日:1980-09-03

    摘要: In the drawing of an optical fibre from a glass preform or gathering mould maintained at an appropriate temperature, a process and a system is described for controlling and regulating the characteristics of the optical fibre. To this purpose the fibre formation temperature within the drawing furnace is controlled by a measurement of the tensile stress. The heating of the furnace is regulated, while maintaining constant the tensile stress on the glass fibre at the fibre formation point. A gauge with an electronic measuring bridge is used to carry out a measurement at the preform suspension point, while correcting the effect of the weight reduction of the preform during drawing.

    摘要翻译: 在从保持在适当温度的玻璃预制件或聚集模具的光纤的图中描述了用于控制和调节光纤特性的工艺和系统。 为此,拉伸炉内的纤维形成温度通过拉伸应力的测量来控制。 调节炉的加热,同时在纤维形成点保持玻璃纤维上的拉伸应力恒定。 使用具有电子测量桥的量规在预制件悬挂点进行测量,同时校正在拉伸期间预制件的重量减轻的效果。