Method and apparatus for detecting airlines in optical fibers
    3.
    发明授权
    Method and apparatus for detecting airlines in optical fibers 失效
    用于检测光纤中的航空公司的方法和装置

    公开(公告)号:US06717659B2

    公开(公告)日:2004-04-06

    申请号:US10172359

    申请日:2002-06-14

    CPC classification number: G01M11/33

    Abstract: 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.

    Abstract translation: 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。

    Method and apparatus for making improved optical fiber preforms and optical fiber therefrom
    4.
    发明授权
    Method and apparatus for making improved optical fiber preforms and optical fiber therefrom 有权
    用于制造改进的光纤预制件和其光纤的方法和装置

    公开(公告)号:US06701753B2

    公开(公告)日:2004-03-09

    申请号:US09781515

    申请日:2001-02-11

    Abstract: 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.

    Abstract translation: 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 。

    Collapsing a multitube assembly and subsequent optical fiber drawing in the same furnace
    5.
    发明授权
    Collapsing a multitube assembly and subsequent optical fiber drawing in the same furnace 有权
    在同一炉中折叠多管组件和随后的光纤拉丝

    公开(公告)号:US06460378B1

    公开(公告)日:2002-10-08

    申请号:US09515227

    申请日:2000-02-29

    Abstract: Embodiments of the invention include a method and apparatus for making a multiple overclad optical fiber preform. The method includes positioning a first overclad tube around a preform core rod, positioning at least one second overclad tube around the first overclad tube, and collectively heating the preform core and the overclad tubes under pressure to collapse the overclad tubes onto the preform core rod thus producing a multiple overclad optical fiber preform. The apparatus includes a preform core rod, a first overclad tube surrounding the preform core rod, and at least one second overclad tube surrounding the first overclad tube. A quartz disc with or without one or more quartz spacers is used for supporting the preform core rod and the first overclad tube within the additional overclad tubes.

    Abstract translation: 本发明的实施例包括用于制造多重外包层光纤预制棒的方法和装置。 该方法包括将第一外包层管围绕预型芯棒定位,将至少一个第二外包层管定位在第一外包管周围,并且在压力下共同加热预成型件芯和外包层管以将外包层管折叠到预成型件芯棒上,从而 生产多重外包层光纤预制棒。 该设备包括预制棒芯棒,围绕预制棒芯棒的第一外包层管和围绕第一外包层管的至少一个第二外包层管。 使用具有或不具有一个或多个石英间隔物的石英盘用于在额外的外包层管内支撑预制棒芯棒和第一外包层管。

    Optical fiber preform cleaning method
    6.
    发明授权
    Optical fiber preform cleaning method 失效
    光纤预制棒清洗方法

    公开(公告)号:US06260386B1

    公开(公告)日:2001-07-17

    申请号:US08208557

    申请日:1994-03-10

    CPC classification number: C03B37/012 B08B7/0021

    Abstract: Glass preforms are cleaned by contacting each preform (11) with supercritical carbon dioxide which dissolves residual index-matching oil on the preform. The liquefied carbon dioxide is then converted to gaseous carbon dioxide which conveniently separates the index-matching oil so that it can be recovered and reused. The gaseous carbon dioxide is likewise recycled for use in cleaning other preforms, and so there is substantially no waste.

    Abstract translation: 通过使每个预制件(11)与超临界二氧化碳接触来清洁玻璃预成型件,所述超临界二氧化碳在预成型件上溶解剩余的折射率匹配油。 然后将液化的二氧化碳转化为气态二氧化碳,其方便地分离指数匹配油,使其可以回收和再利用。 气态二氧化碳同样被循环用于清洁其它预型件,因此基本上没有浪费。

    Methods and apparatuses for controlling optical fiber primary coating diameter
    7.
    发明授权
    Methods and apparatuses for controlling optical fiber primary coating diameter 有权
    控制光纤初级涂层直径的方法和装置

    公开(公告)号:US06923023B2

    公开(公告)日:2005-08-02

    申请号:US10261908

    申请日:2002-10-01

    CPC classification number: C03C25/12

    Abstract: Methods and apparatuses estimate and control optical fiber primary coating diameter for wet-on-wet optical fiber manufacturing. The primary coating diameter for a particular length of optical fiber is calculated based upon a measurement of the weight of primary and/or secondary coating material consumed during optical fiber manufacturing. Control of the primary coating diameter is effected by a coating controller which can increase or decrease the primary coating diameter through control of glass temperature, coating viscosity and/or other parameters during wet-on-wet fiber manufacture.

    Abstract translation: 方法和设备估算和控制湿式湿式光纤制造的光纤初级涂层直径。 基于在光纤制造期间消耗的初级和/或次级涂层材料的重量的测量来计算特定长度的光纤的初始涂层直径。 初级涂层直径的控制由涂层控制器实现,涂层控制器可以通过在湿湿式纤维制造期间控制玻璃温度,涂层粘度和/或其它参数来增加或减少初涂层直径。

Patent Agency Ranking