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公开(公告)号：US06810692B2
公开(公告)日：2004-11-02
申请号：US10445814
申请日：2003-05-28
IPC分类号： C03B37027
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 (5,5′) 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 (5,5′) 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 (5,5′) 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 (5,5′) which are below the separating plates (4, 17) and adapted to blow an inert gas into the inner tubes (5,5′) 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）的光纤和连接到芯管的上端的内管（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）和内管（5,5'）的内部，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; 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），并且适于吹塑 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。
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公开(公告)号：US06668592B1
公开(公告)日：2003-12-30
申请号：US09622827
申请日：2000-08-24
IPC分类号： C03B37029
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 (5,5′) 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 (5,5′) 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, 5′) 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, 5′) which are below the separating plates (4,17) and adapted to blow an inert gas into the inner tubes (5,5′) 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）的光纤和连接到芯管的上端的内管（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）和内管（5,5'）的内部，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离板（4,17）下方的内管（5,5'）的壁表面的部分中的气体吹入口（8），并且适于吹塑 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。
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公开(公告)号：US06735983B1
公开(公告)日：2004-05-18
申请号：US09830939
申请日：2001-05-03
IPC分类号： C03B3702
CPC分类号： C03B37/0253 , C03B37/02736 , C03B37/029 , C03B2205/63 , C03B2205/70 , C03B2205/72 , C03B2205/80
摘要： A fiber drawing method according to the present invention is a drawing method of optical fiber for drawing an optical fiber 14 from one end of a fiber preform 13 by softening with heat, wherein the fiber preform 13 is set in a semi-closed space 10, 20 opening in part at a lower end in a fiber drawing furnace, the fiber preform 13 is heated by a heater 15 disposed on the lower end side of this semi-closed space 10, 20, and fiber drawing is carried out with adjusting a quantity of heat dissipation from the upper portion 20 of this semi-closed space.
摘要翻译： 根据本发明的纤维拉伸方法是通过用热软化从纤维预成型体13的一端拉伸光纤14的光纤的拉丝方法，其中纤维预制棒13设置在半封闭空间10中， 20在纤维拉伸炉的下端部分地开口，纤维预成型体13被设置在该半封闭空间10,20的下端侧的加热器15加热，并且通过调节量进行纤维拉伸 从该半封闭空间的上部20散热。
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公开(公告)号：US06907757B2
公开(公告)日：2005-06-21
申请号：US10078269
申请日：2002-02-20
IPC分类号： G02B6/00 , C03B37/027 , C03B37/029 , C03B37/07 , C03B37/02
CPC分类号： C03B37/029 , C03B2205/63 , Y02P40/57
摘要： The drawing method of the present invention uses a drawing furnace comprising a furnace muffle tube, a furnace body and a heater. According to the method, an optical fiber preform is inserted from the inlet of the furnace muffle tube, the optical fiber preform is melted by means of a heater, under a specified gas atmosphere, and is drawn toward the outlet of the furnace muffle tube by means of a specified drawing tension. The optical fiber preform and the drawing furnace used in this method both satisfy the condition of below-indicated formula (1): L/D≧8 (1) wherein L indicates the length of the furnace body in the drawing direction and D indicates the diameter of the optical fiber preform. Through this method, even for the case of drawing optical fibers having a large relative index difference between the central core and the cladding, optical fibers wherein residual amounts of lattice defects are sufficiently reduced and degradation of characteristics under a hydrogen atmosphere is sufficiently suppressed can be obtained efficiently and at low cost.
摘要翻译： 本发明的拉拔方法使用包括炉马弗管，炉体和加热器的拉丝炉。 根据该方法，从炉马弗管的入口插入光纤预制棒，在特定的气体气氛下，通过加热器将光纤预制棒熔化，并通过炉管马弗管的出口向炉马弗管的出口拉出 指定图纸张力的手段。 本方法中使用的光纤预制棒和拉丝炉均满足下述式（1）的条件：<？in-line-formula description =“In-line formula”end =“lead”？> L / D > = 8（1）<？in-line-formula description =“In-line Formulas”end =“tail”？>其中L表示炉体在拉伸方向上的长度，D表示光纤的直径 预制件。 通过这种方法，即使在中心纤芯和包层之间绘制相对折射率差大的光纤的情况下，也可充分地抑制晶格缺陷残留量的充分降低，氢气氛下的特性劣化得到充分抑制的光纤， 有效地以低成本获得。
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公开(公告)号：US06399158B1
公开(公告)日：2002-06-04
申请号：US09485883
申请日：2000-02-18
IPC分类号： C08F248
CPC分类号： B05D3/067 , B05C3/12 , B05C9/14 , B05D2256/00 , C03C25/12
摘要： The amount of dimming components originating in an ultraviolet-curing resin and adhering to a quartz tube is reduced, and a decline in the ultraviolet transmittance is prevented, during ultraviolet-curing of a resin coated on a liner body through an ultraviolet-transmitting tubular member placed inside a curing apparatus and of curing ultraviolet-curing resin by irradiating ultraviolet rays from outside the ultraviolet-transmitting tubular member. Embodiments include coating the inner surface of the ultraviolet-transmitting tubular member with titanium and employing an atmosphere of lover 0.1% oxygen.
摘要翻译： 源于紫外线固化树脂并附着在石英管上的调光组分的量减少，并且在通过紫外线透射管状部件涂覆在衬垫体上的树脂的紫外线固化期间，可以防止紫外线透过率的下降 放置在固化装置的内部，并且通过从紫外线透过管状部件的外部照射紫外线来固化紫外线固化树脂。 实施例包括用钛涂覆紫外线透射管状部件的内表面并使用情况为0.1％氧气的气氛。
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公开(公告)号：US06928840B1
公开(公告)日：2005-08-16
申请号：US10089719
申请日：2000-10-11
IPC分类号： C03B37/027 , C03B37/029 , G02B6/00 , C03B37/025 , C03B37/03
CPC分类号： C03B37/02718 , C03B37/029 , C03B2205/56 , C03B2205/82 , C03B2205/83 , C03B2205/90
摘要： A drawing apparatus 1 comprises a drawing furnace 11, a protecting tube 21, and a resin curing unit 31. A buffer chamber 41 is disposed between the drawing furnace 11 and the protecting tube 21, and has a length L1 in the drawing direction of the optical fiber 3. The buffer chamber 41 is constituted by a first buffer cell 42 and a second buffer cell 45. In the space within the buffer chamber 41, an He gas, which is an atmosphere gas within the drawing furnace 11, and the air, which is an atmosphere gas within the protecting tube 21, exist in a mixed state. The optical fiber 3 drawn upon heating in the drawing furnace 11 is fed to the protecting tube 21, and a predetermined part of the optical fiber 3 is annealed at a predetermined cooling rate. Thereafter, a coating die 62 coats the optical fiber 3 with a UV resin solution 63, and the resin curing unit 31 cures the UV resin 63, whereby a coated optical fiber 4 is obtained.
摘要翻译： 拉制装置1包括拉丝炉11，保护管21和树脂固化单元31。 缓冲室41设置在拉丝炉11和保护管21之间，并且在光纤3的拉伸方向上具有长度L 1。 缓冲室41由第一缓冲单元42和第二缓冲单元45构成。 在缓冲室41内的空间内，作为吸入炉11内的气氛气体的He气体和作为保护管21内的气氛气体的空气以混合状态存在。 在拉丝炉11中加热拉制的光纤3被送入保护管21，光纤3的规定部分以规定的冷却速度进行退火。 此后，涂布模具62用UV树脂溶液63涂覆光纤3，树脂固化单元31固化UV树脂63，从而获得涂覆的光纤4。
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公开(公告)号：US06543256B1
公开(公告)日：2003-04-08
申请号：US09590166
申请日：2000-06-09
申请人： Toshiki Taru , Ichiro Tsuchiya
发明人： Toshiki Taru , Ichiro Tsuchiya
IPC分类号： C03B37029
CPC分类号： C03B37/15 , G02B6/2835 , G02B6/2856 , Y02P40/57
摘要： In an optical fiber coupler making apparatus which makes an optical fiber coupler by thermally fusing a plurality of optical fibers together by use of a heater and then elongating thus thermally fused part, the heater comprises a heating element which is made of zirconia and which has a slit for containing the optical fibers. The inner face of the heating element is preferentially heated due to a characteristic of its material. Consequently, if optical fibers are contained in the fiber receiving slit, then they can be thermally fused at a sufficiently high temperature in a short period of time, whereby reducing mingling of impurities into the optical fiber coupler. Therefore, the heating element made of zirconia is effective as means for preventing impurities from mingling from the outside thereof. Also, performances of the heating element can be maintained over a long period of time even if the optical fibers are thermally fused at a high temperature. Further, the evaporation of impurities, which may adversely affect characteristics of the optical fiber coupler, hardly occurs from the heating element.
摘要翻译： 在通过使用加热器将多根光纤热熔合在一起并随后拉伸这样的热熔融部分而制造光纤耦合器的光纤耦合器制造装置中，加热器包括由氧化锆制成的加热元件， 用于容纳光纤的狭缝。 由于其材料的特性，加热元件的内表面被优先加热。 因此，如果在光纤接收狭缝中包含光纤，则可以在短时间内以足够高的温度热熔融，从而减少杂质混入光纤耦合器中。 因此，由氧化锆制成的加热元件作为防止杂质从其外部混合的手段是有效的。 此外，即使光纤在高温下热熔融，也可以长时间保持加热元件的性能。 此外，可能不利地影响光纤耦合器的特性的杂质的蒸发几乎不会从加热元件发生。
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公开(公告)号：US06400878B1
公开(公告)日：2002-06-04
申请号：US09939742
申请日：2001-08-28
申请人： Katsuya Nagayama , Yuichi Ohga , Tatsuhiko Saitoh , Shinji Ishikawa , Ichiro Tsuchiya , Takenori Uchiyama
发明人： Katsuya Nagayama , Yuichi Ohga , Tatsuhiko Saitoh , Shinji Ishikawa , Ichiro Tsuchiya , Takenori Uchiyama
IPC分类号： G02B602
CPC分类号： G02B6/03627 , C03B37/02718 , C03B37/029 , C03B37/15 , C03B2201/12 , C03B2201/20 , C03B2201/31 , C03B2203/22 , C03B2205/56 , C03C13/04 , G02B6/02
摘要： An optical fiber preform 2 having a viscosity ratio R&eegr;=&eegr;0/&eegr;t of 2.5 or less between the core average viscosity &eegr;0 and the total average viscosity &eegr;t is prepared, and is drawn by a drawing furnace 11 so as to yield an optical fiber 3, which is then heated to a temperature within a predetermined range so as to be annealed by a heating furnace 21 disposed downstream the drawing furnace 11. Here, upon annealing in the heating furnace 21, the fictive temperature Tf within the optical fiber lowers, thereby reducing the Rayleigh scattering loss. At the same time, the viscosity ratio condition of R&eegr;≦2.5 restrains the stress from being concentrated into the core, thereby lowering the occurrence of structural asymmetry loss and the like. Hence, an optical fiber which can reduce the transmission loss caused by the Rayleigh scattering loss and the like as a whole, and a method of making the same can be obtained.
摘要翻译： 准备在芯平均粘度eta0与总平均粘度etat之间具有2.5或更小的粘度比Reta = eta0 / etat的光纤预制棒2，并由拉丝炉11拉伸以产生光纤3， 然后将其加热到预定范围内的温度，以便通过设置在拉丝炉11下游的加热炉21进行退火。这里，在加热炉21中退火后，光纤内的假想温度Tf降低，从而降低 瑞利散射损失。 同时，Reta <= 2.5的粘度比条件限制了应力集中到芯中，从而降低了结构不对称损失的发生等。 因此，可以获得可以降低由瑞利散射损耗等引起的传输损耗等的整体的光纤及其制造方法。
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公开(公告)号：US5637130A
公开(公告)日：1997-06-10
申请号：US403765
申请日：1995-07-13
IPC分类号： C03B37/027 , C03B37/029
CPC分类号： C03B37/029 , C03B2205/63 , C03B2205/90 , C03B2205/92
摘要： A furnace and method for drawing an optical fiber is provided. The furnace included a furnace core chamber in which a preform is inserted into the chamber through the upper end thereof and a drawn optical fiber is pulled out of the chamber through an opening positioned at the lower end thereof. The furnace also includes a gas-supply means for introducing an inert gas into the furnace core chamber to thus establish an inert gas atmosphere within the chamber, and a heater for heating the preform so that the lower part of the preform is molten and drawn into the optical fiber, which is positioned around the outer periphery of the furnace core chamber. The furnace further includes an inner furnace core tube, which is positioned within the furnace core chamber and which has a cylindrical part whose lower part is communicated to the opening of the furnace core chamber and a funnel-like part which is positioned on the upper end of the cylindrical part. The funnel-like part has a diameter gradually and upwardly increased so as to surround the lower portion of the molten portion of the preform.
摘要翻译： PCT No.PCT / JP94 / 01132 Sec。 371日期1995年7月13日 102（e）1995年7月13日PCT PCT 1994年7月12日PCT公布。 公开号WO95 / 02560 日期：1995年1月26日提供了一种用于拉制光纤的炉和方法。 炉子包括炉芯室，其中预制件通过其上端插入室中，并且拉出的光纤通过位于其下端的开口从室中拉出。 该炉还包括用于将惰性气体引入炉芯室以便在室内建立惰性气体气体的气体供应装置，以及用于加热预制件的加热器，使得预成型件的下部熔化并拉入 该光纤位于炉芯室的外周周围。 该炉还包括内炉芯管，其位于炉芯室内，并具有圆筒部，其下部与炉芯室的开口连通，漏斗状部位于上端 的圆柱形部分。 漏斗状部分的直径逐渐向上增加，以便包围预成型件的熔融部分的下部。
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公开(公告)号：US06530243B1
公开(公告)日：2003-03-11
申请号：US09659831
申请日：2000-09-11
IPC分类号： C03B37027
CPC分类号： C03B37/027 , C03B37/032 , C03B2205/40 , C03C25/12 , Y02P40/57
摘要： A method of drawing an optical fiber which can improve the efficiency in manufacture without deforming resin coatings is provided. The method of drawing an optical fiber in accordance with the present invention is a method in which an optical fiber yielding an outside diameter of 300 to 600 &mgr;m after a resin coating is formed is drawn at a drawing speed of at least 50 m/min, wherein the optical fiber is drawn in a state where the pass line length zp from the outlet of curing furnace to the entrance part of capstan satisfies the following expression (1): z p ≥ - ρ C p _ · d 2 4 · d 2 2 - d 1 2 A · V f · ln [ ( T g - 10 ) - T o T s - T o ] ( 1 ) where Tg is the glass transition temperature of the coating resin [° C.]; TS is the fiber temperature [=TF(0)] at z=0 [° C.]; TO is the room temperature [° C.]; {overscore (&rgr;Cp)} is the average heat capacity of glass and resin [J/(cm3·° C.)]; d1 is the radius before coating [cm]; d2 is the radius after coating [cm]; A is a given constant within the range of 1.5×10−6 to 4.5×10−6 [J/(sec·° C.)]; and Vf is the drawing speed [cm/sec].
摘要翻译： 提供一种拉伸光纤的方法，其可以在不使树脂涂层变形的情况下提高制造效率。 根据本发明的拉伸光纤的方法是在形成树脂涂层后产生300-600μm的外径的光纤以至少50m / min的拉伸速度被拉伸， 其中在从固化炉的出口到主导轴的入口部分的通过线路长度zp满足以下表达式（1）的情况下拉制光纤：其中T g是涂层树脂的玻璃化转变温度[℃] ; TS是z = 0 [℃]时的纤维温度[= TF（0）]; TO是室温[℃]; {overscore（rhoCp是玻璃和树脂的平均热容量[J / （cm 3·℃）]; d1是涂布前的半径[cm]; d2是涂布后的半径[cm]; A是在1.5×10 -6至4.5×10 -6 [J / （sec。°C）]; vf是拉伸速度[cm / sec]。
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