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公开(公告)号：US20240228359A1
公开(公告)日：2024-07-11
申请号：US18561500
申请日：2022-03-31
申请人： Fujikura Ltd.
发明人： Tomoyasu Honda
IPC分类号： C03B37/012
CPC分类号： C03B37/01242 , C03B37/01257 , C03B2205/45
摘要： An optical fiber manufacturing method includes supplying power to a drawing furnace to cause T/V to decrease to Ttarget/Vtarget along a quadratic function having a value of the Ttarget/Vtarget at an apex with lapse of time, where T is a tension applied to an optical fiber when an optical fiber preform is heated by the drawing furnace and the optical fiber is drawn, V is speed of withdrawing the optical fiber when the optical fiber is heated by the drawing furnace and the optical fiber is drawn, Ttarget is a target value of the tension, and Vtarget is a target value of the speed.
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2.发明申请公开(公告)号：US20030086670A1
公开(公告)日：2003-05-08
申请号：US10154968
申请日：2002-05-28
IPC分类号： G02B006/16 , C03B037/075 , G02B006/18
CPC分类号： G02B6/03666 , C03B37/01446 , C03B37/027 , C03B37/02718 , C03B37/02772 , C03B37/029 , C03B2201/12 , C03B2201/20 , C03B2201/31 , C03B2203/24 , C03B2205/42 , C03B2205/45 , C03B2205/47 , C03B2205/56 , C03B2205/83 , C03B2205/90 , C03C13/04 , G02B6/03611 , G02B6/03627 , G02B6/03633 , G02B6/03644 , Y02P40/57
摘要： In a single mode optical fiber formed of a silica-based glass and including a glass part having a central core and a cladding region, the density of non bridging oxygen hole center in the glass part is not higher than 1.0null1014 spins/g in terms of the spin density measured by an electron spin resonance method.
摘要翻译： 在由二氧化硅基玻璃形成并包括具有中心纤芯和包层区域的玻璃部分的单模光纤中，玻璃部分中的非桥接氧孔中心的密度不高于1.0×10 14自旋/ g 的通过电子自旋共振法测量的自旋密度。
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公开(公告)号：US20180244556A1
公开(公告)日：2018-08-30
申请号：US15864028
申请日：2018-01-08
IPC分类号： C03B37/012 , G02B6/02
CPC分类号： C03B37/01222 , C03B37/01231 , C03B37/0124 , C03B37/01251 , C03B37/0126 , C03B37/02736 , C03B37/02745 , C03B37/02772 , C03B2203/34 , C03B2205/07 , C03B2205/08 , C03B2205/45 , C03B2205/46 , C03B2205/47 , G02B6/02042
摘要： There is provided a method for producing a multicore optical fiber while reducing the mass of a glass block to be connected to a common cladding tube. A production method for a multicore optical fiber includes in order, a preform forming step of forming a common cladding tube having a plurality of holes extending between a first end and a second end, an insertion step of inserting core rods in the holes in a state in which end portions of the core rods are recessed from the first end, a heat shrinkage step of reducing a diameter of the first end by heating, a sealing step of sealing the holes by connecting a glass block to the first end, and a drawing step of depressurizing insides of the holes from the second end and performing spinning from the first end while combining the common cladding tube and the core rods.
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公开(公告)号：US20020078715A1
公开(公告)日：2002-06-27
申请号：US10035330
申请日：2002-01-04
发明人： Tomohiro Ishihara , Tatsuhiko Saitoh , Yuichi Ohga
IPC分类号： C03B037/029
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 1800null 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 1800null 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.
摘要翻译： 拉伸装置1具有用于加热和拉伸光纤预制棒2的拉丝炉11，并且在该拉拔炉11中设置碳加热器13.碳加热器13具有设置在拉伸方向上的长度的加热部分 至不小于280毫米。 碳加热器13加热预制件，使得拉丝炉11中的光纤预制棒2的表面上的最高温度变得低于1800℃。将光纤预制棒2拉制成马弗管的温度 拉丝炉11的12被保持在1800℃以下，使得光纤预制棒2中的原子排列在原子排列的随机性降低的状态下变得相对对准。 这允许光纤3被拉伸以反映原子排列的随机性降低的状态，从而可以获得具有降低的瑞利散射强度和降低的传输损耗的光纤3。
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5.发明授权Caustic ray use of the drawdown zone of an optical fiber preform to control the drawing of the fiber 失效苛性射线使用光纤预制棒的牵伸区来控制纤维的拉伸
公开(公告)号：US4102661A
公开(公告)日：1978-07-25
申请号：US774139
申请日：1977-03-03
IPC分类号： C03B37/027 , C03B37/025 , G01B11/24 , G01M11/00 , G01M11/02 , G02B6/00 , G02B6/26 , C03B37/02
CPC分类号： G01M11/37 , C03B37/0253 , G01B11/24 , G02B6/262 , C03B2205/45
摘要： A technique for monitoring the drawdown zone of an optical fiber preform is disclosed. The technique involves detecting the caustic rays emanating from the drawdown zone. Analysis of these rays allows one to determine the geometric properties of both the drawdown zone and the resultant optical fiber. In addition, detailed information concerning the index of refraction distribution in the fiber may be obtained. The process is amenable to realtime applications during the drawing of an optical fiber.
摘要翻译： 公开了一种用于监测光纤预制棒的牵伸区的技术。 该技术涉及检测从下降区发出的苛性射线。 这些光线的分析允许人们确定下拉区域和所得光纤两者的几何性质。 此外，可以获得关于纤维中的折射率分布的详细信息。 该过程适用于在光纤拉制期间的实时应用。
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公开(公告)号：US20170283301A1
公开(公告)日：2017-10-05
申请号：US15631442
申请日：2017-06-23
发明人： Mitsuhiro KAWASAKI
IPC分类号： C03B37/012 , G02B6/02
CPC分类号： C03B37/012 , C03B37/01251 , C03B37/0253 , C03B37/02772 , C03B2205/40 , C03B2205/44 , C03B2205/45 , C03B2205/47 , C03B2205/72 , C03C19/00 , 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.
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公开(公告)号：US20170233283A1
公开(公告)日：2017-08-17
申请号：US15430981
申请日：2017-02-13
发明人： Solyman ASHRAFI
IPC分类号： C03B37/027 , C03B37/16 , G02B6/02
CPC分类号： G02B6/02342 , C03B37/01231 , C03B37/0279 , C03B37/032 , C03B2203/42 , C03B2205/10 , C03B2205/42 , C03B2205/45 , G02B6/02323
摘要： A preform for making a vortex optical fiber comprises a glass cylinder formed substantially of silicone dioxide that defines a core portion along a longitudinal axis of the glass cylinder and a cladding portion surrounding the core portion. The glass cylinder further defines a plurality of holes running parallel to the longitudinal axis from a first end of the glass cylinder to a second end of the glass cylinder.
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公开(公告)号：US20090241604A1
公开(公告)日：2009-10-01
申请号：US12408854
申请日：2009-03-23
申请人： Nobuaki ORITA , Takashi Suzuki , Yoshiyuki Sakata
发明人： Nobuaki ORITA , Takashi Suzuki , Yoshiyuki Sakata
IPC分类号： C03B37/025 , C03B37/02
CPC分类号： C03B37/029 , C03B37/027 , C03B2205/40 , C03B2205/42 , C03B2205/45 , C03B2205/63 , C03B2205/69 , Y02P40/57
摘要： Drawing methods and drawing furnaces for drawing an optical fiber with small non-circularity by simple drawing system are provided. An optical fiber preform is received into a muffle tube and heated by a primary heater placed to surround the muffle tube. The optical fiber preform is heated such that a starting position of a meniscus portion is higher in its position than the top of the primary heater, wherein the meniscus portion is created at the bottom portion of the optical fiber preform.
摘要翻译： 提供了绘制方法和绘图炉，用于通过简单的绘图系统绘制具有小非圆形度的光纤。 光纤预制件被接纳到马弗管中，并通过放置在围绕马弗管的主加热器加热。 加热光纤预制件，使得弯月面部分的起始位置在其比初级加热器的顶部更高的位置，其中弯月面部分在光纤预制件的底部产生。
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公开(公告)号：US08141392B2
公开(公告)日：2012-03-27
申请号：US12408854
申请日：2009-03-23
申请人： Nobuaki Orita , Takashi Suzuki , Yoshiyuki Sakata
发明人： Nobuaki Orita , Takashi Suzuki , Yoshiyuki Sakata
IPC分类号： C03B37/02 , C03B37/025
CPC分类号： C03B37/029 , C03B37/027 , C03B2205/40 , C03B2205/42 , C03B2205/45 , C03B2205/63 , C03B2205/69 , Y02P40/57
摘要： Drawing methods and drawing furnaces for drawing an optical fiber with small non-circularity by simple drawing system are provided. An optical fiber preform is received into a muffle tube and heated by a primary heater placed to surround the muffle tube. The optical fiber preform is heated such that a starting position of a meniscus portion is higher in its position than the top of the primary heater, wherein the meniscus portion is created at the bottom portion of the optical fiber preform.
摘要翻译： 提供了绘制方法和绘图炉，用于通过简单的绘图系统绘制具有小非圆形度的光纤。 光纤预制件被接纳到马弗管中，并通过放置在围绕马弗管的主加热器加热。 加热光纤预制件，使得弯月面部分的起始位置在其比初级加热器的顶部更高的位置，其中弯月面部分在光纤预制件的底部产生。
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公开(公告)号：US20030024272A1
公开(公告)日：2003-02-06
申请号：US10108456
申请日：2002-03-29
发明人： Yasuhiro Naka , Kazuhiro Kawano
IPC分类号： C03B037/07
CPC分类号： C03B37/02745 , C03B37/027 , C03B37/02718 , C03B37/02736 , C03B37/02772 , C03B37/029 , C03B37/032 , C03B2203/19 , C03B2205/06 , C03B2205/40 , C03B2205/44 , C03B2205/45 , C03B2205/72 , C03B2205/91 , C03C25/18 , C03C25/70
摘要： After the start of the control operation of a drawing apparatus, the operation control of a line speed being the drawing-in speed of an optical fiber is performed by a line speed control unit (19), and an optical-fiber feed speed control is performed by a preform feed speed control unit (22), in order that an optical fiber outside diameter measured by an optical-fiber outside diameter measurement unit (8) may become a target outside diameter. By way of example, in a case where the distal end of an optical fiber preform is not in a shape steadily melted in a heating furnace, the preform speed control unit (22) controls the feed speed of the optical fiber preform in the three stages of an optical-fiber-preform initial feed speed control, an acceleration-associated preform feed speed control and a line speed-associated preform feed speed control. In a case where the distal end of the optical fiber preform is in the steadily melted shape, the unit (22) controls the preform feed speed in two stages in which the acceleration-associated preform feed speed control is omitted from the three stages. In optical fiber drawing, troubles such as the breaking of the optical fiber can be suppressed even during the acceleration of the line speed.
摘要翻译： 在绘图装置的控制操作开始之后，通过线速度控制单元（19）执行作为光纤的绘制速度的线速度的操作控制，并且光纤馈送速度控制是 由预成型件进给速度控制单元（22）执行，以便由光纤外径测量单元（8）测量的光纤外径可以成为目标外径。 作为示例，在光纤预制棒的前端不是在加热炉中不稳定地形成的形状的情况下，预成型体速度控制单元（22）将光纤预制件的进给速度控制在三个阶段 光纤预制件初始进给速度控制，加速相关的预成型件进给速度控制和与线速度相关的预成型件进给速度控制。 在光纤预制件的远端处于稳定熔融状态的情况下，单元（22）在三级中省略加速度相关的预成型件进给速度控制的两个阶段来控制预成型件进给速度。 在光纤拉丝中，即使在线速度加快的情况下，也能够抑制光纤的断裂等故障。
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