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    • 2. 发明授权
    • Process for fabricating optical fiber involving tuning of core diameter profile
    • 制造光纤涉及芯直径轮廓调谐的工艺
    • US06553790B1
    • 2003-04-29
    • US09567536
    • 2000-05-09
    • James William Fleming, Jr.George John Zydzik
    • James William Fleming, Jr.George John Zydzik
    • C03B3707
    • C03B37/01254C03B37/01211C03B37/0124C03B2203/18
    • A silica-based core rod is traversed by a heat source along its longitudinal axis, to provide heated, softened regions. During the traverse, compressive or tensile movements are provided along the rod's longitudinal axis, these movements inducing, respectively, increases or decreases in the core diameter at the softened regions. By providing selective core diameter increases and/or decreases across the entire length of the core rod, a desired core diameter profile is attained. It is possible to attain a substantially uniform core diameter, or a varying core diameter profile that provides particular properties, such as systematically varying dispersion. In addition, due to the ability to increase core diameter and core rod diameter in a controlled manner, it is possible to make larger core rods, and in turn larger fiber preforms, than presently possible.
    • 二氧化硅基芯棒沿其纵向轴线被热源横穿,以提供加热的软化区域。 在横移过程中,沿着杆的纵向轴线提供压缩或拉伸运动,这些运动分别在软化区域处引起芯直径的增加或减小。 通过在芯棒的整个长度上提供选择的芯直径增加和/或减小,获得期望的芯直径分布。 可以获得基本均匀的芯直径或提供特定性能的变化的芯直径轮廓,例如系统变化的分散体。 另外,由于能够以受控的方式增加芯直径和芯棒直径,所以可以制造比目前可能的更大的芯棒,以及大的纤维预制件。
    • 5. 发明授权
    • Fabricating graded index plastic optical fibers
    • 制造渐变折射率塑料光纤
    • US06265018B1
    • 2001-07-24
    • US09387607
    • 1999-08-31
    • Lee L. Blyler, Jr.Gary J. GrimesCharles J. Sherman
    • Lee L. Blyler, Jr.Gary J. GrimesCharles J. Sherman
    • C03B3707
    • G02B6/02038B29C47/00B29C47/0014B29D11/00682B29D11/00721
    • Fabricating graded index plastic optical fiber by diffusing a high molecular weight dopant within a step index plastic optical fiber after the step index plastic optical fiber has been drawn from a preform using a conventional draw tower in a first embodiment. Also, the step index plastic optical fiber may be fabricated by extruding one material circumferentially around another material, e.g., by use of a concentric nozzle. The dopant is diffused after the drawing or extruding of the step index plastic optical fiber by heating the plastic optical fiber to a temperature that causes a high rate of diffusion state while measuring the transmission bandwidth of the plastic optical fiber. When the predetermined specified transmission bandwidth is measured, the plastic optical fiber is immediately returned to an ambient temperature. In addition, the plastic optical fiber may be gradually heated to an equilibrium temperature that is just below the temperature required to produce the high rate of diffusion state. Once the equilibrium temperature has been achieved, additional heating is carried out to raise the temperature to that required to produce the high rate of diffusion and the transmission bandwidth is tested.
    • 在第一实施例中,使用常规牵引塔从预成型件中取出阶梯折射率塑料光纤之后,通过在阶跃折射率塑料光纤中扩散高分子量掺杂剂来制造渐变折射率塑料光纤。 而且,阶跃折射率塑料光纤可以通过例如通过使用同心喷嘴将一种材料周向地围绕另一种材料周向地挤出来制造。 通过在塑料光纤的传输带宽测量的同时,通过将塑料光纤加热到导致高扩散速率的温度,在拉伸或挤出阶梯折射率塑料光纤之后,掺杂剂扩散。 当测量预定的指定传输带宽时,塑料光纤立即返回到环境温度。 此外,塑料光纤可以逐渐加热到刚好低于产生高扩散状态速率所需的温度的平衡温度。 一旦达到平衡温度,进行额外的加热,将温度提高到产生高扩散速率所需的温度,并测试传输带宽。
    • 6. 发明授权
    • Apparatus for controlling the sag of a preform in an installation
    • 用于在安装中控制预制件的下垂的装置
    • US06196028B1
    • 2001-03-06
    • US08555178
    • 1995-11-08
    • Patrick HumbertPierre RipocheJoël LandiJacques Goudeau
    • Patrick HumbertPierre RipocheJoël LandiJacques Goudeau
    • C03B3707
    • C03B37/01486C03B33/085Y02P40/57
    • The invention relates to apparatus for supporting a preform manufactured in an installation for manufacturing or building up preforms having supporting cores, said installation including at least rotation means having a horizontal axis of rotation and two mounting points between which the supporting core of the preform to be manufactured or built up is mounted, plasma-torch and material-supply means disposed radially relative to said supporting core and being mounted to move in axial translation relative to and parallel to the supporting core so as to make said preform around said supporting core, said apparatus being wherein it includes controlled support means constituting additional localized abutment points between said mounting points for said preform being manufactured or built up.
    • 本发明涉及一种用于支撑在用于制造或构建具有支撑芯的预成型件的装置中制造的预制件的装置,所述装置至少包括具有水平旋转轴线的旋转装置和两个安装点,预成型件的支撑芯在该两个安装点之间 制造或建造的等离子体炬和材料供应装置相对于所述支撑芯径向设置并且被安装成相对于支撑芯线并平行于轴向平移移动,以便使所述预制件围绕所述支撑芯,所述 装置,其中它包括受控的支撑装置,在所述用于制造或建造的预制件的安装点之间构成附加的局部邻接点。
    • 7. 发明授权
    • Temperature control by means of a CCD-camera in welding fiber ribbon cables
    • 通过CCD相机对焊接光纤带状电缆进行温度控制
    • US06499319B1
    • 2002-12-31
    • US09584472
    • 2000-06-01
    • Sasan Esmaeili
    • Sasan Esmaeili
    • C03B3707
    • G01J5/0003G01J2005/0077G01N21/67G02B6/2551
    • In welding optical fiber ribbons by means of an electric arc formed between electrodes the region heated by the electric arc is mapped on CCD-elements in a camera. In the obtained picture the light intensity of those portions of the picture is determined which correspond to the heated fiber portions. This light intensity is used for setting the electric current flowing between the electrodes, so that a desired welding temperature is obtained and so that also a desired, lower temperature is obtained in the fiber ends in a preparatory softening stage, which has a long durability and which is performed before the very welding stage. This determination of temperatures by means of measured light intensities gives reliable values also in the case where ambient conditions like the air pressure are changed, the state of the electrodes is changed owing to contamination, etc. During the preparatory stage the ends of the individual fibers are deformed, so that they can come in contact with each other, even if the end surfaces of the individual fibers in a fiber ribbon are not located in a plane, which extends in an angle that is exactly perpendicular to the longitudinal direction of the fiber ribbon, and so that mechanical stresses obtained when pressing the fiber ends against each other are relieved.
    • 在通过在电极之间形成的电弧焊接光纤带时,由电弧加热的区域映射在相机中的CCD元件上。 在获得的图像中,确定与加热的纤维部分相对应的那些部分的光强度。 该光强度用于设定在电极之间流动的电流,从而获得期望的焊接温度,并且在纤维端部在预备软化阶段中获得期望的较低温度,其具有长的耐久性和 这是在焊接阶段之前进行的。 通过测量的光强度的这种温度测定也可以在诸如空气压力的环境条件改变,电极的状态由于污染等而改变的情况下产生可靠的值。在预备阶段,各个纤维的端部 使得它们彼此接触,即使纤维带中的各纤维的端面不位于与纤维的纵向方向精确垂直的角度延伸的平面中 并且使得当将纤维按压在一起时获得的机械应力相互抵消。
    • 10. 发明授权
    • Method of elongating glass preform
    • 拉伸玻璃预制棒的方法
    • US06438997B1
    • 2002-08-27
    • US09535531
    • 2000-03-27
    • Tatsuhiko SaitoTomomi Moriya
    • Tatsuhiko SaitoTomomi Moriya
    • C03B3707
    • C03B37/0124C03B37/01205
    • In a method of elongating a glass preform comprising the steps of holding both ends of the glass preform 1a with a first holding section 2 and a second holding section 3, respectively; moving the first holding section 2 and the second holding section 3 in a longitudinal direction of the glass preform 1a with the moving speed of the first holding section 2 faster than that of the second holding section 3 and, at the same time, heating and softening the glass preform 1a by a heating section 4 successively; and elongating the glass preform 1a by a tensile force applied thereto, so as to form an elongated body 1c; an electric furnace is employed in the heating section 4; and said method further comprising the steps of setting a reference value R1 with respect to an outside diameter at a specific position 1d in a tapered region 1b in the glass preform 1a in the process of elongating; acquiring an actually measured value R2 at the specific position 1d; and controlling the moving speed of the first holding section 2 and/or second holding section 3 according to a value (R2/R1) obtained from the reference value R1 and actually measured value R2.
    • 一种拉伸玻璃预制件的方法,包括以下步骤:分别将玻璃预成型体1a的两端保持在第一保持部分2和第二保持部分3上; 在第一保持部分2的移动速度比第二保持部分3的移动速度更快的同时沿着玻璃预制件1a的纵向方向移动第一保持部分2和第二保持部分3,同时加热和软化 玻璃预制件1a依次通过加热部4; 并通过施加到其上的张力拉长玻璃预成型体1a,以形成细长体1c; 在加热部4中使用电炉; 并且所述方法还包括以下步骤:在拉伸过程中,在玻璃预成型体1a的锥形区域1b中,在特定位置1d处的外径设定基准值R1; 在特定位置1d获取实际测量值R2; 并根据从参考值R1和实际测量值R2获得的值(R2 / R1)来控制第一保持部分2和/或第二保持部分3的移动速度。