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    Optical fiber preform and the method of producing the same
    3.
    发明申请
    Optical fiber preform and the method of producing the same 有权
    光纤预制棒及其制造方法

    公开(公告)号：US20050214543A1

    公开(公告)日：2005-09-29

    申请号：US10970379

    申请日：2004-10-22

    申请人： Yukio Koumura ,  Yasuhiro Naka ,  Nobuaki Orita

    发明人： Yukio Koumura ,  Yasuhiro Naka ,  Nobuaki Orita

    IPC分类号： G02B6/00 ,  C03B37/012 ,  C03B37/014 ,  C03B37/027 ,  B32B17/06

    CPC分类号： C03B37/027 ,  C03B37/01446 ,  C03B37/01466 ,  C03B2205/90 ,  Y02P40/57 ,  Y10T428/24926 ,  Y10T428/2495

    摘要： An optical fiber preform (1) serving as a material of an optical fiber has a shoulder portion (12) thrusting beyond a middle portion (M) in a base end region (K) which is on the upper side when the optical fiber preform is suspended for a drawing process. The optical fiber preform (1) of this configuration can be easily produced by appropriately setting the heating condition, etc. for the sintering step in the production process. Thus, it is possible to omit the elongating step after the sintering step, thereby simplifying the production process. Further, in the prior-art technique, turbulence is generated in the gas flow in the furnace of the drawing apparatus toward the end of the drawing step, making it impossible to draw in a stable manner. In contrast, in this embodiment, due to the shoulder portion (12), there is a small gap between the inner wall surface of the furnace and the optical fiber preform; due to this small gap, the gas flow is regulated, and the drawing can be conducted in a stable manner even toward the end of the drawing step.

    摘要翻译： 用作光纤材料的光纤预制件（1）具有在光纤预制棒是在上侧的基端部区域（K）中超过中间部分（M）的肩部（12） 暂停绘制过程。 通过在生产过程中适当地设定烧结步骤的加热条件等，可以容易地制造这种结构的光纤预制件（1）。 因此，可以省略烧结步骤后的延伸工序，从而简化了制造工序。 此外，在现有技术中，在拉拔装置的炉内的气流中产生湍流，使得不可能稳定地绘制。 相反，在本实施方式中，由于肩部（12），炉内壁面和光纤预制体之间存在小间隙， 由于这种小的间隙，气流被调节，并且即使在拉拔步骤结束时也可以以稳定的方式进行拉伸。

    Furnace and method for optical fiber wire driwing
    4.
    发明申请
    Furnace and method for optical fiber wire driwing 有权
    用于光纤丝线浇注的炉子和方法

    公开(公告)号：US20030205068A1

    公开(公告)日：2003-11-06

    申请号：US10445814

    申请日：2003-05-28

    申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.

    发明人： Toshiki Taru ,  Katsuya Nagayama ,  Kazuya Kuwahara ,  Ichiro Tsuchiya

    IPC分类号： C03B037/029

    CPC分类号： C03B37/029 ,  C03B2205/63 ,  C03B2205/74 ,  C03B2205/80 ,  C03B2205/90 ,  C03B2205/92 ,  C03B2205/98

    摘要： A furnace for drawing an optical fiber provided with a muffle tube (10) and inner tubes (5, 5null) connected to the upper end of the core tube, wherein a preform (1) supported by a dummy rod (2) at the upper part thereof is disposed inside the muffle tube (10) and inner tubes (5, 5null) so as to be movable downward together with dummy rod (2), the preform (1) is heated and melted by a heater (11) from the outside of the muffle tube (10) and an optical fiber (1a) is pulled out from the lower end of the preform (1); the furnace is further provided with one or a plurality of sets of separating plates (4, 17) adapted to partition a space in the inner tubes (5, 5null) above the preform (1) into a plurality of portions in the advance direction of the preform and disposed in the space, and with gas blowing inlets (8) disposed in the parts of wall surfaces of the inner tubes (5, 5null) which are below the separating plates (4, 17) and adapted to blow an inert gas into the inner tubes (5, 5null) and the muffle tube (10), thereby preventing variations in diameter of the optical fiber (1a).

    摘要翻译： 一种用于拉制设置有马弗管（10）的光纤和连接到核心管的上端的内管（5,5'）的炉，其中，在所述芯管的上端由所述虚拟棒（2）支撑的预成型件（1） 其上部设置在马弗管（10）内部和内管（5,5'）内，以便与虚拟棒（2）一起向下移动，预成型件（1）由加热器（11）加热和熔化， 从马弗管（10）的外部和光纤（1a）从预成型件（1）的下端拉出; 该炉还设置有一组或多组分离板（4,17），其适于将预成型件（1）上方的内管（5,5'）中的空间分隔成前进方向的多个部分 并且设置在所述空间中，并且具有设置在所述分隔板（4,17）下方的内管（5,5'）的壁表面的部分中的气体吹入口（8），并适于吹塑 惰性气体进入内管（5,5'）和马弗管（10），从而防止光纤（1a）的直径变化。

    Apparatus for controlling lightguide fiber tension during drawing
    5.
    发明授权
    Apparatus for controlling lightguide fiber tension during drawing 失效
    拉丝过程中控制光纤纤维张力的装置

    公开(公告)号：US4578098A

    公开(公告)日：1986-03-25

    申请号：US621291

    申请日：1984-06-15

    申请人： Un C. Paek ,  Charles M. Schroeder

    发明人： Un C. Paek ,  Charles M. Schroeder

    IPC分类号： C03B37/027 ,  C03B37/029 ,  C03B23/04

    CPC分类号： C03B37/029 ,  C03B37/02718 ,  C03B2205/40 ,  C03B2205/64 ,  C03B2205/90 ,  C03B2205/91

    摘要： A lightguide furnace (10) includes a tube (32) at its base. The tube (32) has at least one opening (34) therethrough, in communication with, but substantially misaligned relative to, a corresponding opening (40) through a sleeve (36) coaxially aligned with, and rotatable about the tube (32). The substantial misalignment between each sleeve opening (40) and each tube opening (34) causes the cooling gas entering the furnace to be directed at least partially around the lightguide fiber (14). The cooling gas passes upwardly along the walls of the furnace away from the lightguide fiber (14) to reduce the likelihood of contamination thereof by particulates in the cooling gas. By rotating the sleeve (36) relative to the tube (32), the degree of misalignment of the sleeve openings (40) relative to the tube openings (34) can be adjusted to control the lightguide fiber cooling to regulate the tension.

    摘要翻译： 光导炉（10）在其底部包括管（32）。 管（32）具有穿过其中的至少一个开口（34），其通过与管（32）同轴对准并且可绕其旋转的套筒（36）与相应的开口（40）连通但基本上不对准。 每个套管开口（40）和每个管开口（34）之间的实质的未对准导致进入炉的冷却气体至少部分地指向光导纤维（14）周围。 冷却气体沿着炉壁远离光导纤维（14）向上流动，以减少由冷却气体中的颗粒物污染的可能性。 通过相对于管（32）旋转套筒（36），可以调节套筒开口（40）相对于管开口（34）的未对准程度，以控制光导纤维冷却以调节张力。

    Method of drawing an optical fiber
    8.
    发明授权
    Method of drawing an optical fiber 失效
    拉丝光纤的方法

    公开(公告)号：US5897681A

    公开(公告)日：1999-04-27

    申请号：US972638

    申请日：1997-11-18

    申请人： Hans-Jurgen Lysson ,  Anne Dieumegard ,  Arnaud Mairesse

    发明人： Hans-Jurgen Lysson ,  Anne Dieumegard ,  Arnaud Mairesse

    IPC分类号： C03B37/027 ,  C03B37/029 ,  C03B37/02 ,  C03B37/025

    CPC分类号： C03B37/027 ,  C03B37/029 ,  C03B2205/64 ,  C03B2205/81 ,  C03B2205/90 ,  C03B2205/98

    摘要： To draw an optical fiber (10) from one end of a glass preform (9) which is heated to above the glass softening temperature at least in that area, a gas (21) flows around the preform (9) into a furnace space (16) during the drawing process and subsequent feeding of the preform. During the feeding, the areas that are adjacent to the drawing end of the preform (9) pass through gas zones in which the helium content of the furnace gas increases in the drawing direction.

    摘要翻译： 为了从至少在该区域被加热到玻璃软化温度的玻璃预制件（9）的一端上拉制光纤（10），气体（21）围绕预成型件（9）流入炉空间 16），并且随后进料预成型件。 在进料期间，与预成型体（9）的拉伸端相邻的区域通过其中炉内气体的氦含量在拉拔方向上增加的气体区域。

    Method and apparatus for contaminant removal in manufacturing optical fibre
    9.
    发明授权
    Method and apparatus for contaminant removal in manufacturing optical fibre 失效
    制造光纤中污染物去除的方法和装置

    公开(公告)号：US4988374A

    公开(公告)日：1991-01-29

    申请号：US270234

    申请日：1988-11-14

    申请人： Ian D. Harding ,  Peter R. Ince ,  Roger S. Preston

    发明人： Ian D. Harding ,  Peter R. Ince ,  Roger S. Preston

    IPC分类号： C03B37/029

    CPC分类号： C03B37/029 ,  C03B2205/63 ,  C03B2205/64 ,  C03B2205/70 ,  C03B2205/90 ,  C03B2205/98

    摘要： An extrnal fibre drawing furnace is maintained at or close to its normal working temperature while contaminants are removed between fibre pulls. Either a removable insert, replaceable gas port assembly, or cleanable gas transfer duct, enable this to be achieved while the furnace is maintained at or near its operating temperature, so that the down time is of the order of minutes rather than hours.

    摘要翻译： 外部纤维拉丝炉保持在其正常工作温度或接近其正常工作温度，同时在纤维拉力之间除去污染物。 可移除的插入件，可更换的气体端口组件或可清洁的气体输送管道使得能够在炉子保持在其工作温度或接近其工作温度的情况下实现这一点，使得停机时间为数分钟而不是数小时。