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    OPTICAL FIBER DRAWING METHOD AND DRAWING DEVICE
    1.
    发明公开
    OPTICAL FIBER DRAWING METHOD AND DRAWING DEVICE 审中-公开
    程序为拖带拖带光纤及器件

    公开(公告)号：EP1211228A1

    公开(公告)日：2002-06-05

    申请号：EP00942422.7

    申请日：2000-06-30

    申请人： Sumitomo Electric Industries, Ltd.

    发明人： ISHIHARA, Tomohiro Yokohama Works ,  SAITO, Tatsuhiko Yokohama Works ,  OHGA, Yuichi Yokohama Works

    IPC分类号： C03B37/027 ,  C03B37/029

    CPC分类号： C03B37/027 ,  C03B37/02772 ,  C03B37/029 ,  C03B2205/45 ,  C03B2205/47 ,  C03B2205/63 ,  C03B2205/72

    摘要： A drawing apparatus 1 has a drawing furnace 11 for heating and drawing an optical fiber preform 2, and a carbon heater 13 is disposed in this drawing furnace 11. The carbon heater 13 has a heating portion the length of which in a drawing direction is set to not less than 280 mm. The carbon heater 13 heats the preform so that a maximum temperature on the surface of the optical fiber preform 2 in the drawing furnace 11 becomes below 1800°C. The optical fiber preform 2 is drawn in a state in which the temperature of the muffle tube 12 of the drawing furnace 11 is kept below 1800°C, so that atomic arrangement in the optical fiber preform 2 becomes relatively aligned in a state of reduced randomness of atomic arrangement. This permits the optical fiber 3 to be drawn as reflecting the reduced randomness state of atomic arrangement, whereby the optical fiber 3 can be obtained with reduced Rayleigh scattering intensity and lowered transmission loss.

    METHOD FOR DRAWING GRIN LENS FIBER
    5.
    发明公开
    METHOD FOR DRAWING GRIN LENS FIBER 有权
    VERFAHREN ZUR HERSTELLUNG VON GRIN-LINSEN-FASER

    公开(公告)号：EP2415720A1

    公开(公告)日：2012-02-08

    申请号：EP09842949.1

    申请日：2009-03-30

    申请人： Toyo Glass Co., Ltd.

    发明人： FUKUDA, Toshiaki

    IPC分类号： C03B37/02 ,  G02B3/00 ,  G02B6/028

    CPC分类号： C03B37/02772 ,  C03B2203/26 ,  C03B2205/47 ,  G02B3/0087 ,  G02B6/028

    摘要： When drawing of a GRIN lens from a preform is started, wastage of the preform is reduced and the amount of time taken from the start of elongation of the preform to the start of winding is reduced. A preform, to a lower end of which a weight formed of silica is fused, is set in a heating furnace, and drawing of the preform is started by heating a fused portion where the preform and the weight are fused to each other. This can reduce wastage of the preform. Since an elongation speed of the preform is increased by the weight of the weight, the amount of time taken from the start of the elongation of the preform to the start of winding can be decreased.

    摘要翻译： 当从预成型件拉出GRIN透镜时，预成型件的浪费减少，并且从预成型件伸长开始到开始卷绕所花费的时间减少。 将预成型体（其下端由二氧化硅形成的重物熔化）放置在加热炉中，并通过加热预成型件和重量彼此熔合的熔融部分来开始拉伸预成型件。 这可以减少预制件的浪费。 由于预制件的伸长速度通过重量的重量而增加，因此可以减少从预成型件的伸长开始到开始卷绕所花费的时间。

    OPTICAL FIBER DRAWING METHOD AND DRAWING DEVICE
    8.
    发明公开
    OPTICAL FIBER DRAWING METHOD AND DRAWING DEVICE 审中-公开
    程序为拖带拖带光纤及器件

    公开(公告)号：EP1211228A4

    公开(公告)日：2005-06-01

    申请号：EP00942422

    申请日：2000-06-30

    申请人： SUMITOMO ELECTRIC INDUSTRIES

    发明人： ISHIHARA TOMOHIRO ,  SAITO TATSUHIKO ,  OHGA YUICHI

    IPC分类号： C03B37/027 ,  C03B37/029 ,  G02B6/00

    CPC分类号： C03B37/027 ,  C03B37/02772 ,  C03B37/029 ,  C03B2205/45 ,  C03B2205/47 ,  C03B2205/63 ,  C03B2205/72

    摘要： A fiber drawing device (1) has a drawing furnace (11) provided with a carbon heater (13), for heat-drawing an optical fiber preform (2). The carbon heater (13) has a heating portion at least 280 mm in length in a drawing direction, and emits heat so that a maximum temperature on the surface of the optical fiber preform (2) in the furnace (11) is lower than 1800 DEG C. When the preform (2) is drawn with the temperature of a furnace tube (12) of the furnace (11) kept below 1800 DEG C, an atomic arrangement in the preform (2) is comparatively adjusted and is kept minimized in disorderedness. Whereby, it is possible to provide the optical fiber (3) lowered in Rayleigh scattering intensity and in transmission loss, reflecting a lowered atomic arrangement disorderedness in the drawn optical fiber (3).

    摘要翻译： 一个绘图装置1具有用于加热和光纤预型体2的图纸拉丝炉11，和一个碳加热器13在该拉丝炉11的碳加热器13具有在拉伸方向被设定的长度的加热部分被设置 为不低于280毫米。 碳加热器13个加热所述预成型件，以便做光纤预制件2的拉丝炉11变得低于1800℃的表面上的最大温度的光纤母材2被吸入的状态下马弗管的温度 在拉丝炉11的12保持在低于1800℃，如此做了原子排列在光纤预制件2在降低的原子排列的随机性的状态变得相对对准。 这允许光纤3被绘制为反射的原子排列，从而使光纤3能够以减少瑞利获得散射光的强度和降低的传输损耗的降低的随机性状态。

    METHOD AND APPARATUS FOR RESHAPING THE DRAW END OF AN OPTICAL FIBER PREFORM
    9.
    发明公开
    METHOD AND APPARATUS FOR RESHAPING THE DRAW END OF AN OPTICAL FIBER PREFORM 有权
    METHOD FOR FORMING光纤预制件的拉丝END

    公开(公告)号：EP1328481A1

    公开(公告)日：2003-07-23

    申请号：EP00970525.2

    申请日：2000-09-29

    申请人： CORNING INCORPORATED

    发明人： CRAFT, Tony, A. ,  KELMER, Kenneth, J. ,  WATKINS, Theresa, L.

    IPC分类号： C03B37/012

    CPC分类号： C03B37/02772 ,  C03B37/01251 ,  C03B2205/47

    摘要： A method and apparatus for the pregobbing of an optical fiber preform to provide pre-optimized tip taper and system for drawing optical fiber therefrom. The downtime of an optical fiber drawing apparatus can be considerably shortened, by providing preforms that have a pre-optimized tip shape. Pre-optimized tips are provided which are melted off at the tip by an induction heater of a heating furnace. Preferably, the pregobbing furnace has substantially the same temperature profile as the draw furnace. Therefore, because the tip of the preform is optimized and unusable glass has been removed, throughput of the draw apparatus is advantageously increased. Moreover, the shape of the tip of the preform is optimized in that it has been exposed to the same temperature profile as it would have seen had the draw tip been formed in the draw furnace.

    OPTICAL FIBER PARENT MATERIAL AND METHOD FOR MANUFACTURING OPTICAL FIBER
    10.
    发明公开
    OPTICAL FIBER PARENT MATERIAL AND METHOD FOR MANUFACTURING OPTICAL FIBER 审中-公开
    光纤母材和制造光纤的方法

    公开(公告)号：EP3243803A1

    公开(公告)日：2017-11-15

    申请号：EP16735094.1

    申请日：2016-01-08

    申请人： Furukawa Electric Co. Ltd.

    发明人： KAWASAKI, Mitsuhiro

    IPC分类号： C03B37/012 ,  C03C19/00 ,  G02B6/02

    CPC分类号： C03B37/012 ,  C03B37/01251 ,  C03B37/0253 ,  C03B37/02772 ,  C03B2205/40 ,  C03B2205/44 ,  C03B2205/45 ,  C03B2205/47 ,  C03B2205/72 ,  G02B6/02

    摘要： An optical fiber preform includes: a columnar portion having an approximately constant radius of r; and a taper portion located adjacent to the columnar portion in a lengthwise direction and having a radius decreasing along the lengthwise direction. The taper portion includes: a first taper portion including a portion having a radius varying between 0.9r and 0.6r; and a second taper portion including a portion having a radius varying between 0.4r and 0.15r. A diameter of the first taper portion in the portion having the radius varying between 0.9r and 0.6r decreases so as to form a maximum angle θ1 between 40 degrees and 60 degrees with respect to the columnar portion, a diameter of the second taper portion in the portion having the radius varying between 0.4r and 0.15r decreases so as to form an average angle θ2 between 5 degrees and 30 degrees with respect to a central axis in the lengthwise direction, and a volume of the taper portion is smaller than or equal to 45% of a volume of a column having a same outer diameter as a maximum outer diameter of the taper portion and having a same length as the taper portion.

    摘要翻译： 一种光纤预制棒包括：具有近似不变的半径r的柱状部分; 以及在长度方向上与所述柱状部分相邻并且具有沿所述长度方向减小的半径的锥形部分。 锥形部分包括：第一锥形部分，其包括半径在0.9r和0.6r之间变化的部分; 以及包括半径在0.4r和0.15r之间变化的部分的第二锥形部分。 半径在0.9r和0.6r之间变化的部分中的第一锥形部分的直径减小，从而相对于柱形部分形成40度和60度之间的最大角度θ1，第二锥形部分的直径 半径在0.4r和0.15r之间变化的部分减小，从而相对于中心轴在长度方向上形成5度和30度之间的平均角度θ2，并且锥形部分的体积小于或等于 相同外径的锥体部分的最大外径的圆柱体积的45％，并具有与锥体部分相同的长度。