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。

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。

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。

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。

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。

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。

公开(公告)号：US06567597B2

公开(公告)日：2003-05-20

申请号：US09899020

申请日：2001-07-06

申请人： Eisuke Sasaoka ,  Masashi Onishi ,  Katsuya Nagayama ,  Kaoru Okuno ,  Kazuya Kuwahara

发明人： Eisuke Sasaoka ,  Masashi Onishi ,  Katsuya Nagayama ,  Kaoru Okuno ,  Kazuya Kuwahara

IPC分类号： G02B602

CPC分类号： G02B6/03644 ,  C03B37/0253 ,  C03B37/027 ,  C03B37/02745 ,  C03B37/032 ,  C03B2203/19 ,  C03B2203/36 ,  C03B2205/06 ,  G02B6/02247 ,  G02B6/02285 ,  G02B6/278

摘要： The present invention provides an optical fiber and the like comprising a structure making it possible to realize optical communications with a higher speed and a larger capacity as compared with conventional optical transmission systems. The optical fiber according to the present invention is an optical fiber in which at least one first portion having a positive chromatic dispersion at a predetermined wavelength within a wavelength band in use and at least one second portion having a negative chromatic dispersion at the predetermined wavelength are arranged adjacent each other along the longitudinal direction thereof. In particular, the optical fiber comprises a polarization coupling structure for inducing coupling between polarization modes of propagating light. This polarization coupling structure randomly causes coupling between polarization modes of the propagating light, whereby polarization mode dispersion decreases at the predetermined wavelength. As a consequence, transmission characteristics are effectively restrained from deteriorating due to polarization mode dispersion. Specifically, the polarization coupling structure is a twist applied to the optical fiber.

摘要翻译： 本发明提供一种光纤等，其包括与常规光传输系统相比可以实现具有更高速度和更大容量的光通信的结构。 根据本发明的光纤是一种光纤，其中在使用中的波长带内的预定波长具有正色散的至少一个第一部分和在预定波长处具有负色散的至少一个第二部分是 沿着其纵向彼此相邻布置。 特别地，光纤包括用于在传播光的偏振模式之间引起耦合的偏振耦合结构。 该偏振耦合结构随机引起传播光的偏振模式之间的耦合，从而偏振模色散在预定波长处降低。 结果，由于偏振模式色散，传输特性被有效地抑制为劣化。 具体地，偏振耦合结构是施加到光纤上的扭转。

公开(公告)号：US20060101861A1

公开(公告)日：2006-05-18

申请号：US11245095

申请日：2005-10-07

申请人： Katsuya Nagayama ,  Tatsuhiko Saitoh ,  Yuichi Ohga ,  Kazuya Kuwahara

发明人： Katsuya Nagayama ,  Tatsuhiko Saitoh ,  Yuichi Ohga ,  Kazuya Kuwahara

IPC分类号： C03B37/029

摘要： A drawing apparatus 1 comprises a drawing furnace 11, a heating furnace 21, and a resin curing section 31. An optical fiber 3 drawn upon heating in the drawing furnace 11 is sent to a heating furnace 21, where a predetermined part of the optical fiber 3 is annealed at a predetermined cooling rate. The temperature of a heater 22 of the heating furnace 21 at the furnace center is set to a temperature within the range from 1200 to 1600° C. Thereafter, the optical fiber 3 is coated with a UV resin liquid 52 by a coating die 51, and the UV resin 52 is cured in the resin curing section 31, so as to yield a coated optical fiber 4.

摘要翻译： 拉伸装置1包括拉丝炉11，加热炉21和树脂固化部31。 将在拉丝炉11中加热而拉制的光纤3送入加热炉21，在加热炉21中，光纤3的规定部分以规定的冷却速度进行退火。 炉中心的加热炉21的加热器22的温度设定在1200〜1600℃的温度范围内。此后，通过涂布模51将光纤3涂覆有紫外线树脂液52， 并且在树脂固化部分31中固化UV树脂52，以产生涂覆的光纤4。

公开(公告)号：US06935139B2

公开(公告)日：2005-08-30

申请号：US10143925

申请日：2002-05-14

申请人： Katsuya Nagayama ,  Kazuya Kuwahara ,  Takayuki Shimazu

发明人： Katsuya Nagayama ,  Kazuya Kuwahara ,  Takayuki Shimazu

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

CPC分类号： C03B37/029 ,  C03B37/027 ,  C03B37/02718 ,  C03B2205/56 ,  C03B2205/63 ,  Y02P40/57

摘要： The method of manufacturing an optical fiber in accordance with the present invention comprises a step of yielding an optical fiber by drawing an optical fiber preform softened upon heating, wherein a temperature at which the optical fiber preform is softened is at least 1800° C., whereas the optical fiber preform or optical fiber has a glass cooling rate of 4000° C./sec or less when attaining a temperature of 1800° C.

摘要翻译： 根据本发明的制造光纤的方法包括通过拉伸在加热时软化的光纤预制棒来产生光纤的步骤，其中光纤预制件软化的温度为至少1800℃， 而当达到1800℃的温度时，光纤预制棒或光纤的玻璃冷却速度为4000℃/秒以下。

公开(公告)号：US06502428B1

公开(公告)日：2003-01-07

申请号：US09698280

申请日：2000-10-30

申请人： Masashi Onishi ,  Kazuya Kuwahara ,  Katsuya Nagayama

发明人： Masashi Onishi ,  Kazuya Kuwahara ,  Katsuya Nagayama

IPC分类号： C03B3707

CPC分类号： G02B6/03666 ,  C03B37/0253 ,  C03B2203/18 ,  C03B2203/36 ,  C03B2205/40 ,  C03B2205/72 ,  G02B6/02271 ,  G02B6/0283 ,  G02B6/03627

摘要： A manufacturing method of an optical fiber, which enables to precisely manufacture the optical fiber having a desired chromatic dispersion, comprising: (1) preparing an optical fiber preform having a longitudinally uniform refractive index, (2) measuring the chromatic dispersion of a predetermined length of the optical fiber obtained at the beginning of the drawing, (3) according to the results of such measurement, estimating the chromatic dispersion characteristic of the optical fiber obtained by drawing the optical fiber preform, and commencing the drawing of the optical fiber preform. To achieve the target chromatic dispersion diameter of the optical fiber is determined according to the chromatic dispersion that is measured with respect to a predetermined length of an optical fiber obtained at the beginning of the drawing of an optical fiber preform. Then, the remainder of the optical fiber preform is drawn to produce an optical fiber having the desired chromatic dispersion.

摘要翻译： 一种光纤制造方法，其能够精确地制造具有期望的色散的光纤，包括：（1）制备具有纵向均匀折射率的光纤预制棒，（2）测量预定长度的色散 ，（3）根据这种测量结果，估计通过拉制光纤预制棒而获得的光纤的色散特性，并开始拉伸光纤预制棒。 根据在光纤预制件的绘制开始时获得的光纤的预定长度测量的色散来确定实现光纤的目标色散直径。 然后，拉出光纤预制件的其余部分，以产生具有所需色散的光纤。