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    • 3. 发明授权
    • Method and apparatus for detecting airlines in optical fibers
    • 用于检测光纤中的航空公司的方法和装置
    • US06717659B2
    • 2004-04-06
    • US10172359
    • 2002-06-14
    • Haiying HuangJames HudsonSiu-Ping HongRonald Lamar Adams
    • Haiying HuangJames HudsonSiu-Ping HongRonald Lamar Adams
    • G01N2100
    • G01M11/33
    • Defects in optical fibers are detected during manufacturing by using three bandpass filters to separate signals from a scattered light signal produced by a light source in a fiber measurement system. The separated signals include a clad diameter signal, a regular airline signal and a core airline signal. The regular airline signal is compared with the clad diameter signal to produce a normalized regular airline signal, and the core airline signal is compared with the clad diameter signal to produce a normalized core airline signal. The normalized regular airline signal and normalized core airline signal are monitored to determine if they increase, which indicates the presence of a defect in the optical fiber.
    • 通过使用三个带通滤波器在光纤测量系统中分离来自光源产生的散射光信号的信号,在制造过程中检测光纤中的缺陷。 分离的信号包括包层直径信号,常规航空公司信号和核心航空公司信号。 将常规航空公司信号与包层直径信号进行比较以产生归一化的正常航空公司信号,并将核心航空公司信号与包层直径信号进行比较以产生归一化的核心航空公司信号。 监控归一化的正常航空公司信号和归一化的核心航空公司信号,以确定它们是否增加,这表明光纤中存在缺陷。
    • 4. 发明授权
    • Method and apparatus for making improved optical fiber preforms and optical fiber therefrom
    • 用于制造改进的光纤预制件和其光纤的方法和装置
    • US06701753B2
    • 2004-03-09
    • US09781515
    • 2001-02-11
    • Xiaoyuan DongSiu-Ping Hong
    • Xiaoyuan DongSiu-Ping Hong
    • C03B37025
    • C03B37/02754C03B37/01211C03B37/01245C03B37/01248C03B37/01254C03B2205/08C03B2205/14C03B2205/16Y02P40/57
    • Embodiments of the invention include a method and apparatus for making optical fiber preforms and optical fiber. The method includes the steps of positioning an overclad tube around a preform core rod, heating the overclad tube along the length thereof in the presence of a pressure gradient to collapse onto the preform core to form the overclad optical fiber preform, and adjusting the radial size of a heated portion of the preform core rod and/or the overclad tube to actively match the radial dimensions of the preform core rod along the length thereof with corresponding portions of the overclad tube. The active matching reduces variations in the physical dimensions of the preform core rod and/or the overclad tube, which improves transmission and other performance characteristics of fiber drawn from the created preform, e.g., by maintaining a relatively constant D/d ratio of the preform.
    • 本发明的实施例包括用于制造光纤预制棒和光纤的方法和装置。 该方法包括以下步骤:将包层管定位在预成型芯棒周围,在存在压力梯度的情况下沿着其长度加热外包层管,以塌缩到预成形芯上以形成外包层光纤预制件,并调节径向尺寸 预成型件芯棒和/或外包层管的加热部分,以将预型芯棒的径向尺寸与其外包层管的相应部分沿其长度主动匹配。 主动匹配减少了预制棒芯棒和/或外包层管的物理尺寸的变化,这改进了从所产生的预制件中拉出的纤维的透射和其它性能特征,例如通过保持预成型件的相对恒定的D / d比 。