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    Method of making optical fiber with low melting glass core
    101.
    发明公开
    Method of making optical fiber with low melting glass core 失效
    用低熔点玻璃芯制造光纤的方法

    公开(公告)号：EP0761616A3

    公开(公告)日：1997-03-26

    申请号：EP96306086.8

    申请日：1996-08-21

    Applicant: AT&T Corp.

    Inventor： Bruce, Allan James ,  DiGiovanni, David John

    IPC: C03B37/012

    CPC classification number: C03B37/0124 ,  C03B37/01245 ,  C03B37/01274 ,  C03B2201/02 ,  C03B2201/31 ,  C03B2201/32 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2201/50 ,  C03B2201/86

    Abstract: The disclosed method of making a mixed glass optical fiber exemplarily comprises providing a high-silica tube, and causing molten non-high silica glass to flow into the bore (12) of the tube by application of a pressure differential. In order to prevent cracking, the tube desirably has an outer diameter/inner diameter ratio of at least 5, preferably about 10 or even more, and an inner diameter of at most 1 mm. In a preferred embodiment, a conventional SiO 2 tube is partially collapsed to an inner diameter less than 1 mm, a quantity of a non-high-silica glass is placed in a neck of the partially collapsed tube and heated such that molten glass communicates with the reduced-diameter portion of the bore and can be drawn into the reduced-diameter portion by means of a vacuum. The resulting mixed glass body is then further stretched to result in a core rod of core diameter at most 0.3 mm. After overcladding the core rod with SiO 2 , fiber is drawn from the thus produced preform. A thus produced fiber with SiO 2 cladding and SiO 2 -Al 2 O 3 -La 2 O 3 -Er 2 O 3 core was used as an optical fiber amplifier and provided high gain.

    Abstract translation: 所公开的制造混合玻璃光纤的方法示例性地包括提供高硅石管，并且通过施加压差使得熔融的非高硅石玻璃流入管的孔（12）。 为了防止破裂，管理想地具有至少5，优选地约10或甚至更多的外径/内径比，以及至多1mm的内径。 在一个优选的实施方案中，常规的SiO2管部分塌陷至小于1mm的内径，将一定量的非高硅石玻璃置于部分塌陷的管的颈部并加热，使得熔融玻璃与 直径减小的部分并且可以通过真空吸入缩径部分。 然后将得到的混合玻璃体进一步拉伸以得到芯直径至多0.3mm的芯棒。 在用SiO 2包覆芯棒之后，从如此制造的预制棒中拉出纤维。 使用这样制造的具有SiO 2包层和SiO 2 -Al 2 O 3 -La 2 O 3 -Er 2 O 3芯的光纤作为光纤放大器并提供高增益。

    Method of forming glass articles
    103.
    发明公开
    Method of forming glass articles 失效
    Verfahren zum Herstellen vonGlasgegenständen。

    公开(公告)号：EP0471152A1

    公开(公告)日：1992-02-19

    申请号：EP91107460.7

    申请日：1991-05-08

    Applicant: CORNING INCORPORATED

    Inventor： Cornelius, Lauren Kay, Corning Incorporated ,  Tick, Paul Arthur, Corning Incorporated

    IPC: C03B18/00 ,  C03B37/012 ,  C03B37/023 ,  C03B37/027 ,  C03B37/029 ,  C03B23/037 ,  C03B23/047 ,  C03B18/02 ,  C03B15/02 ,  C03B15/14

    CPC classification number: C03B18/02 ,  C03B15/02 ,  C03B15/14 ,  C03B18/00 ,  C03B23/037 ,  C03B23/047 ,  C03B37/023 ,  C03B37/027 ,  C03B37/029 ,  C03B2201/82 ,  C03B2201/84 ,  C03B2201/86 ,  C03B2205/02 ,  C03B2205/64 ,  C03B2205/69

    Abstract: 5n7 Disclosed is a method and apparatus for drawing an elongated glass article (32) such as a fiber optic device. The article (32) is drawn upwardly from a source (28) through the surface of a quantity of molten metal (21) having a vertical temperature gradient. The source can be an elongated solid glass preform (28) that is vertically positioned within the molten metal (21) such that the temperature of that portion of the molten metal adjacent the upper end region is sufficiently high to heat that region to drawing temperature. The upper end region (29) is pulled to form a tapered root, continued pulling resulting in the formation of an elongated article (32) from the small diameter root end. The relative position of the root is maintained with respect to the surface of the molten metal during the drawing operation. Alternatively, the glass can be drawn from an orifice located within the molten metal.
    The apparatus includes container means (11,12) for supporting the molten metal (21), and external or internal means (22,23) for heating and/or cooling portions of the molten metal (21). The container (11,12) can also be provided with baffle means for dividing the container into a plurality of chambers.

    Abstract translation: 公开了一种拉伸玻璃制品（32）的方法和装置，例如光纤装置。 物品（32）从源（28）向上抽取通过具有垂直温度梯度的一定数量的熔融金属（21）的表面。 源可以是垂直设置在熔融金属（21）内的细长的固体玻璃预制件（28），使得靠近上端区域的熔融金属部分的温度足够高以将该区域加热到拉伸温度。 上端区域（29）被拉动以形成锥形根部，继续拉动导致从小直径根端部形成细长制品（32）。 在拉拔操作期间，相对于熔融金属的表面保持根部的相对位置。 或者，玻璃可以从位于熔融金属内的孔口拉出。 该设备包括用于支撑熔融金属（21）的容器装置（11,12）和用于加热和/或冷却熔融金属（21）的部分的外部或内部装置（22,23）。 容器（11,12）还可以设置有用于将容器分成多个室的挡板装置。

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