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1. 发明授权

US06546760B1 Optical fiber drawing furnace with a zig zag heating element 失效
标题翻译：光纤拉丝炉采用锯齿形加热元件
公开(公告)号：US06546760B1
公开(公告)日：2003-04-15
申请号：US08674865
申请日：1996-07-03
申请人： Ichiro Tsuchiya , Kohei Kobayashi , Hiroaki Ohta , Kazuya Kuwahara , Katsuyuki Tsuneishi , Hideo Miyaki , Yasuo Matsuda
发明人： Ichiro Tsuchiya , Kohei Kobayashi , Hiroaki Ohta , Kazuya Kuwahara , Katsuyuki Tsuneishi , Hideo Miyaki , Yasuo Matsuda
IPC分类号： C03B37029
CPC分类号： C03B37/029 , C03B2205/63 , H05B3/145 , H05B3/44
摘要： There is provided an optical fiber drawing furnace capable of drawing an optical fiber having small non circularity, which drawing furnace includes a muffle tube, in which an optical fiber preform is supplied, a heater surrounding the muffle tube, a plurality of electrode connecting portion extending from the heater, a plurality of electrodes connected to electrode connecting portions, and in conjunction therewith to an electric power source, and unifying means for unifying the temperature distribution along the circumferential direction.
摘要翻译：提供了一种能够拉伸小圆形光纤的光纤拉丝炉，该拉丝炉包括一个马弗管，其中提供了一个光纤预制棒，一个围绕马弗管的加热器，多个电极连接部分延伸从加热器，连接到电极连接部分的多个电极，以及与电源连接的多个电极，以及用于统一沿着周向的温度分布的统一装置。

2. 发明授权

US06735983B1 Optical fiber drawing method and drawing furnace 失效
标题翻译：光纤拉丝法和拉丝炉
公开(公告)号：US06735983B1
公开(公告)日：2004-05-18
申请号：US09830939
申请日：2001-05-03
申请人： Toshiki Taru , Ichiro Tsuchiya , Katsuyuki Tsuneishi , Katsuya Nagayama , Kazuya Kuwahara
发明人： Toshiki Taru , Ichiro Tsuchiya , Katsuyuki Tsuneishi , Katsuya Nagayama , Kazuya Kuwahara
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。

3. 发明授权

US06530243B1 Method of making an optical fiber with an improved UV-curable resin 有权
标题翻译：制备具有改进的UV固化树脂的光纤的方法
公开(公告)号：US06530243B1
公开(公告)日：2003-03-11
申请号：US09659831
申请日：2000-09-11
申请人： Kazuya Kuwahara , Ichiro Tsuchiya , Yasuhiro Naganuma
发明人： Kazuya Kuwahara , Ichiro Tsuchiya , Yasuhiro Naganuma
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]。

4. 发明授权

US06907757B2 Drawing method of optical fiber and drawing furnace 失效
标题翻译：光纤拉丝炉拉丝方法
公开(公告)号：US06907757B2
公开(公告)日：2005-06-21
申请号：US10078269
申请日：2002-02-20
申请人： Kazuya Kuwahara , Katsuya Nagayama , Ichiro Tsuchiya , Masashi Onishi
发明人： Kazuya Kuwahara , Katsuya Nagayama , Ichiro Tsuchiya , Masashi Onishi
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。

5. 发明授权

US06810692B2 Method of controlling an upper portion of an optical fiber draw furnace 有权
标题翻译：控制光纤拉丝炉上部的方法
公开(公告)号：US06810692B2
公开(公告)日：2004-11-02
申请号：US10445814
申请日：2003-05-28
申请人： Toshiki Taru , Katsuya Nagayama , Kazuya Kuwahara , Ichiro Tsuchiya
发明人： Toshiki Taru , Katsuya Nagayama , Kazuya Kuwahara , Ichiro Tsuchiya
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。

6. 发明授权

US06668592B1 Optical fiber drawing furnace having adjustable partitions 有权
标题翻译：光纤拉丝炉具有可调隔板
公开(公告)号：US06668592B1
公开(公告)日：2003-12-30
申请号：US09622827
申请日：2000-08-24
申请人： Toshiki Taru , Katsuya Nagayama , Kazuya Kuwahara , Ichiro Tsuchiya
发明人： Toshiki Taru , Katsuya Nagayama , Kazuya Kuwahara , Ichiro Tsuchiya
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。

7. 发明授权

US06399158B1 Method and apparatus for curing ultraviolet-curing resin 有权
标题翻译：固化紫外线固化树脂的方法和设备
公开(公告)号：US06399158B1
公开(公告)日：2002-06-04
申请号：US09485883
申请日：2000-02-18
申请人： Kazuya Kuwahara , Katsuya Nagayama , Ichiro Tsuchiya
发明人： Kazuya Kuwahara , Katsuya Nagayama , Ichiro Tsuchiya
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。

8. 发明授权

US06928840B1 Optical fiber producing method 有权
标题翻译：光纤生产方法
公开(公告)号：US06928840B1
公开(公告)日：2005-08-16
申请号：US10089719
申请日：2000-10-11
申请人： Katsuya Nagayama , Yuichi Ohga , Kazuya Kuwahara , Ichiro Tsuchiya
发明人： Katsuya Nagayama , Yuichi Ohga , Kazuya Kuwahara , Ichiro Tsuchiya
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。

9. 发明授权

US08346041B2 Optical communications system 有权
标题翻译：光通信系统
公开(公告)号：US08346041B2
公开(公告)日：2013-01-01
申请号：US13371835
申请日：2012-02-13
申请人： Eisuke Sasaoka , Kazuya Kuwahara
发明人： Eisuke Sasaoka , Kazuya Kuwahara
IPC分类号： G02B6/00 , H04B10/12
CPC分类号： G02B6/02019 , G02B6/0365 , H04B10/2916
摘要： The present invention relates to an optical communications system that allows improving OSNR while suppressing the power increase of pumping light for distributed Raman amplification. In the optical communications system, an optical fiber is laid in a transmission section between a transmitter station (or repeater station) and a receiver station (or repeater station), and optical signals are transmitted from the transmitter station to the receiver station via the optical fiber. In the optical communications system, pumping light for Raman amplification, outputted by a pumping light source provided in the receiver station, is fed into the optical fiber via an optical coupler, and the optical signals are distributed-Raman-amplified in the optical fiber. The transmission loss and the effective area of the optical fiber satisfy, at the wavelength of 1550 nm, a predetermined relationship.
摘要翻译：本发明涉及一种允许改善OSNR同时抑制用于分布式拉曼放大的泵浦光功率增加的光通信系统。在光通信系统中，光纤被放置在发射台（或中继站）和接收站（或中继站）之间的传输部分中，并且光信号经由光信号从发射台发射到接收站纤维。在光通信系统中，由接收站中提供的泵浦光源输出的用于拉曼放大的泵浦光通过光耦合器馈送到光纤中，并且光信号在光纤中被分布拉曼放大。光纤的传输损耗和有效面积在1550nm的波长下满足预定的关系。

10. 发明申请

US20050066690A1 Method of and apparatus for producing optical fiber 审中-公开
标题翻译：光纤制造方法及设备
公开(公告)号：US20050066690A1
公开(公告)日：2005-03-31
申请号：US10951812
申请日：2004-09-29
申请人： Taiichiro Yamashita , Toru Adachi , Kazuya Kuwahara , Hiroki Shimoda
发明人： Taiichiro Yamashita , Toru Adachi , Kazuya Kuwahara , Hiroki Shimoda
IPC分类号： C03B37/02 , C03B37/012 , C03B37/029 , G02B6/00 , C03B37/07
CPC分类号： C03B37/02754 , C03B37/029 , C03B2205/08 , C03B2205/14 , C03B2205/64 , C03B2205/74
摘要： A method produces an optical fiber without requiring a vertically large space, and an apparatus implements the method. The method produces an optical fiber by heating a lower-end portion of an optical fiber preform with a heating element so that the optical fiber preform can be drawn. In this method, the optical fiber preform is drawn by moving a heat-generating portion of the heating element from the lower-end portion toward an upper-end portion of the optical fiber preform. The apparatus produces an optical fiber by heating a lower-end portion of an optical fiber preform with a heating element so that the optical fiber preform can be drawn. The apparatus comprises a mechanism for moving a heat-generating portion of the heating element from the lower-end portion toward an upper-end portion of the optical fiber preform.
摘要翻译：一种方法产生光纤而不需要垂直的大空间，并且设备实现该方法。该方法通过用加热元件加热光纤预成型件的下端部分来制造光纤，使得可以拉制光纤预制件。在该方法中，通过将加热元件的发热部分从光纤预制棒的下端部向上端部移动来拉伸光纤预制棒。该装置通过用加热元件加热光纤预制件的下端部分来制造光纤，使得可以拉制光纤预制件。该装置包括用于将加热元件的发热部分从光纤预制件的下端部向上端部移动的机构。

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