公开(公告)号：US07194171B2

公开(公告)日：2007-03-20

申请号：US10401606

申请日：2003-03-31

申请人： Masao Tsukitani ,  Eisuke Sasaoka ,  Eiji Yanada ,  Yuichi Ohga

发明人： Masao Tsukitani ,  Eisuke Sasaoka ,  Eiji Yanada ,  Yuichi Ohga

IPC分类号： G02B6/02

CPC分类号： G02B6/03644 ,  G02B6/02004 ,  G02B6/02242 ,  G02B6/02261 ,  G02B6/03627

摘要： A dispersion compensating optical fiber comprises a minimum wavelength at which an increase amount of an actual loss value with respect to a theoretical loss value is not less than 10 mdB/km in a use wavelength band and on a long wavelength side of the use wavelength band. The actual loss value is measured in a state that the fiber is looped around a bobbin. The minimum wavelength falls within a range of 1,565 to 1,700 nm. This dispersion compensating optical fiber is suitably used for an optical transmission line of a large-capacity high-speed WDM optical transmission system.

摘要翻译： 色散补偿光纤包括在使用波长带和使用波长带的长波长侧的实际损耗值相对于理论损耗值的增加量不小于10mdB / km的最小波长 。 实际损耗值是在纤维环绕绕线管的状态下测量的。 最小波长在1,565至1,700nm的范围内。 该色散补偿光纤适用于大容量高速WDM光传输系统的光传输线路。

公开(公告)号：US06851282B2

公开(公告)日：2005-02-08

申请号：US09991820

申请日：2001-11-26

申请人： Katsuya Nagayama ,  Yuichi Ohga ,  Tatsuhiko Saitoh ,  Hiroshi Takamizawa

发明人： Katsuya Nagayama ,  Yuichi Ohga ,  Tatsuhiko Saitoh ,  Hiroshi Takamizawa

IPC分类号： C03B37/027 ,  C03B37/029 ,  C03B37/02 ,  C03B37/10

CPC分类号： C03B37/02718 ,  C03B37/029 ,  C03B2205/40 ,  C03B2205/56 ,  C03B2205/90

摘要： A drawing apparatus 1 has a drawing furnace 11, a heating furnace 21, and a resin curing section 31. The drawing furnace 11 has a muffle tube 13 to which an He gas supply passage 15 from an He gas supply section 14 is connected so as to supply He gas. The optical fiber 3 drawn upon heating by the drawing furnace 11 is fed to the heating furnace 21, whereby a predetermined part of the optical fiber 3 is annealed at a predetermined cooling rate. The heating furnace 21 has a muffle tube 23 to which an N2 gas supply passage 25 from an N2 gas supply section 24 is connected so as to supply N2 gas. Thereafter, the optical fiber 3 is coated with a UV resin 39 by a coating die 38, and the UV resin 39 is cured in the resin curing section 31, whereby a coated optical fiber 4 is formed.

摘要翻译： 拉制装置1具有拉丝炉11，加热炉21和树脂固化部31.拉拔炉11具有马弗管13，从He气供给部14连接有He气体供给路15， 供应他天然气。 通过拉丝炉11加热而拉制的光纤3被送入加热炉21，由此光纤3的预定部分以预定的冷却速度退火。 加热炉21具有马弗管23，从N 2气体供给部24连接有N 2气体供给路25，供给N 2气体。 此后，通过涂布模具38将光纤3涂覆有UV树脂39，并且在树脂固化部分31中固化UV树脂39，从而形成涂覆的光纤4。

公开(公告)号：US06705772B2

公开(公告)日：2004-03-16

申请号：US10161624

申请日：2002-06-05

申请人： Motonori Nakamura ,  Osamu Kasuu ,  Daisuke Yokota ,  Yuichi Ohga

发明人： Motonori Nakamura ,  Osamu Kasuu ,  Daisuke Yokota ,  Yuichi Ohga

IPC分类号： G02B6255

CPC分类号： G01N21/67 ,  G01N21/72

摘要： An optical fiber splicing method capable of fully reducing the splice loss at room temperature is provided. In the optical fiber splicing method in accordance with the present invention, respective end faces of optical fibers are fused together in a splicing step (S101). In a condition setting step (S102), a set value &agr;0 is set. Thereafter, a heating step (S103), a measuring step (S104), and a termination determining step (S105) are carried out repeatedly. In the heating step, a region including the fusion-spliced point is heated under a predetermined heating condition. In the measuring step, splice loss is measured. In the termination determining step, the splice loss &agr;n measured in the measuring step and the set value &agr;0 set in the condition setting step are compared with each other in terms of magnitude. If the splice loss &agr;n is not greater than the set value &agr;0, then it is determined that the alternation should be terminated, whereby the optical fiber connecting operation is terminated.

摘要翻译： 提供能够完全降低室温下的接头损耗的光纤接合方法。 在根据本发明的光纤拼接方法中，光纤的各个端面在拼接步骤中熔合在一起（S101）。 在条件设定步骤（S102）中，设定设定值α0。 此后，重复执行加热步骤（S103），测量步骤（S104）和终止确定步骤（S105）。 在加热步骤中，在预定加热条件下加热包含熔接点的区域。 在测量步骤中，测量接头损耗。 在终止确定步骤中，在测量步骤中测量的拼接损耗色差和在条件设置步骤中设置的设置值α0在幅度方面彼此进行比较。 如果接头损失字母不大于设定值α0，则确定应该终止交替，从而终止光纤连接操作。

公开(公告)号：US5674305A

公开(公告)日：1997-10-07

申请号：US498425

申请日：1995-07-05

申请人： Yuichi Ohga ,  Susumu Uchida

发明人： Yuichi Ohga ,  Susumu Uchida

IPC分类号： C03B29/02 ,  C03B37/014 ,  C03B37/07 ,  G02B6/00 ,  C03B37/027

CPC分类号： C03B37/01446 ,  C03B29/02 ,  C03B37/01466

摘要： The present invention relates to a process wherein a large glass preform is flame abraded to have a clear and smooth surface. In particular, the present invention pertains to a method for flame abrading a surface of a rotating glass preform by an oxyhydrogen flame which moves along a length of the glass preform, in which a movement velocity of the oxyhydrogen flame or a flow rate of oxyhydrogen of the oxyhydrogen flame is varied to conduct the flame abrasion treatment.

摘要翻译： 本发明涉及一种方法，其中大玻璃预制件被火焰磨损以具有透明和光滑的表面。 特别地，本发明涉及一种用于通过沿着玻璃预成型件的长度移动的氢氧焰火焰研磨旋转的玻璃预制件的表面的方法，其中氢氧焰的移动速度或氢氧的流速 改变氧氢火焰进行火焰磨损处理。

公开(公告)号：US20050262875A1

公开(公告)日：2005-12-01

申请号：US11081843

申请日：2005-03-17

申请人： Kohji Kusunoki ,  Shuichiro Kato ,  Yuichi Ohga

发明人： Kohji Kusunoki ,  Shuichiro Kato ,  Yuichi Ohga

IPC分类号： G02B6/00 ,  C03B23/04 ,  C03B23/043 ,  C03B23/045 ,  C03B23/049 ,  C03B37/012 ,  C03B37/018

CPC分类号： C03B23/0496

摘要： In a method of manufacturing the glass tube of the invention, a glass tube having an inner diameter of a predetermined size is formed by forming a softened portion by heating a glass material and inserting an inner forming member to the softened portion. An outer diameter of the softened portion is formed into an outer diameter of a predetermined size by bringing an outer forming member movable in a direction orthogonal to a longitudinal direction axis of the glass material into contact with an outer circumference of the softened portion.

摘要翻译： 在制造本发明的玻璃管的方法中，通过加热玻璃材料并将内部成形构件插入软化部来形成软化部，形成内径为规定尺寸的玻璃管。 通过使外部成形构件能够沿与玻璃材料的纵向轴线正交的方向移动而与软化部的外周接触，使软化部的外径形成为规定尺寸的外径。

公开(公告)号：US06895783B2

公开(公告)日：2005-05-24

申请号：US09956867

申请日：2001-09-21

申请人： Toshihiro Ohishi ,  Yuichi Ohga ,  Motonori Nakamura

发明人： Toshihiro Ohishi ,  Yuichi Ohga ,  Motonori Nakamura

IPC分类号： C03B37/018 ,  C03B8/04 ,  C03B37/014 ,  G02B6/00

CPC分类号： C03B37/01486 ,  C03B37/0142 ,  C03B2207/52 ,  C03B2207/66 ,  C03B2207/70 ,  Y02P40/57

摘要： A plurality of glass particles synthesizing burners are arranged at a predetermined burner interval opposite to a rotating starting rod. The starting rod and the glass particles synthesizing burners are relatively parallely reciprocally moved, and the soot deposition is conducted. A reciprocating speed v(mm/minute), axis rotating speed r (rpm), and burner interval L (mm) are set so that a value A expressed by the expression A=(r/v)×L is in a range 40≧A≧8.

摘要翻译： 合成燃烧器的多个玻璃颗粒以与旋转起始杆相反的预定燃烧器间隔布置。 合成燃烧器的起始杆和玻璃颗粒相对平行地往复移动，并进行烟灰沉积。 设定往复速度v（mm /分钟），轴转速r（rpm）和燃烧器间隔L（mm），使得由表达式A =（r / v）×L表示的值A在40> = A> = 8。

公开(公告)号：US06889529B2

公开(公告)日：2005-05-10

申请号：US09983624

申请日：2001-10-25

申请人： Toshihiro Ooishi ,  Yuichi Ohga ,  Yoshio Yokoyama ,  Motonori Nakamura

发明人： Toshihiro Ooishi ,  Yuichi Ohga ,  Yoshio Yokoyama ,  Motonori Nakamura

IPC分类号： G02B6/00 ,  C03B37/014 ,  C03B37/07 ,  B05D1/10

CPC分类号： C03B37/0142 ,  C03B37/01493 ,  C03B2207/36 ,  C03B2207/52 ,  C03B2207/66 ,  C03B2207/70 ,  Y02P40/57

摘要： A method for producing an optical fiber preform is provided in which the variation of the outer diameter in the longitudinal direction is minimized and a target quantity of glass is accumulated as a whole. Based on a predetermined relationship between three variables: the outer diameter of a starting rod being a first variable, the outer diameter of an optical fiber preform a second variable, and the timing for ending the glass particles depositing process a third variable, the starting rod and burners are subjected to relative reciprocating movement so as to deposit glass particles on the starting rod until the timing for ending the depositing process, and then the resulting deposit body is vitrified. The third variable may be the traverse velocity, the glass particles deposition time, or the weight of a soot glass deposit body.

摘要翻译： 提供了一种光纤预制棒的制造方法，其中，使长径方向的外径变化最小化，玻璃的目标量整体上累积。 基于三个变量之间的预定关系：起始杆的外径为第一变量，光纤预制件的外径为第二变量，以及用于结束玻璃颗粒沉积过程的第三变量的定时，起始杆 并对燃烧器进行相对往复运动，以将玻璃颗粒沉积在起始杆上直到结束沉积过程的时刻，然后使所得的沉积体被玻璃化。 第三个变量可以是横穿速度，玻璃颗粒沉积时间或烟灰玻璃沉积体的重量。

公开(公告)号：US5788734A

公开(公告)日：1998-08-04

申请号：US795016

申请日：1997-02-05

申请人： Sumio Hoshino ,  Toshio Danzuka ,  Yuichi Ohga ,  Masumi Ito ,  Katsuzo Mukai

发明人： Sumio Hoshino ,  Toshio Danzuka ,  Yuichi Ohga ,  Masumi Ito ,  Katsuzo Mukai

IPC分类号： C03B37/012 ,  C03B37/014 ,  C03B37/027

CPC分类号： C03B37/01205 ,  C03B37/014 ,  C03B37/0142 ,  C03B37/01446 ,  C03B37/01466 ,  C03B37/01486 ,  C03B37/02736 ,  C03B2207/60

摘要： A glass preform for an optical fiber is effectively drawn by connecting dummy rods to both ends of the glass preform and connecting the dummy rods to fitting members.

摘要翻译： 通过将虚拟棒连接到玻璃预制件的两端并将虚拟棒连接到配件构件来有效地拉制用于光纤的玻璃预制件。

公开(公告)号：US5763081A

公开(公告)日：1998-06-09

申请号：US738841

申请日：1996-10-28

申请人： Yuichi Ohga ,  Shinji Ishikawa ,  Tadashi Enomoto

发明人： Yuichi Ohga ,  Shinji Ishikawa ,  Tadashi Enomoto

IPC分类号： G02B6/00 ,  C03B37/027 ,  C03C3/06 ,  C03C13/04 ,  G02B6/02 ,  B32B9/00 ,  B29D11/00

CPC分类号： C03C13/045 ,  C03B37/027 ,  C03C3/06 ,  G02B6/02 ,  C03B2201/12 ,  C03B2201/31 ,  Y02P40/57 ,  Y10T428/2933 ,  Y10T428/2962 ,  Y10T428/2964

摘要： A glass body for optical fiber containing GeO.sub.2 --SiO.sub.2 glass in a core portion thereof, in which the GeO.sub.2 --SiO.sub.2 glass has an absorbance at 5.16 eV of at least 1/mm but not higher than 2.5/mm or in which concentration of Ge.sup.2+ contained in the GeO.sub.2 --SiO.sub.2 glass substantially lies within the range of 1.1.times.10.sup.-9 to 2.8.times.10.sup.-9 mol/mm.sup.3 as calculated by the following general equation: A=.epsilon..sub.5.16ev .multidot.C.sub.(Ge2+) .multidot.1 wherein A is absorbance which is expressed by A=-log T (T being transmittance) and normalized per 1 mm of optical path length, C.sub.(Ge2+) is Ge.sup.2+ concentration, .epsilon..sub.5.16ev is absorption coefficient (1/mol/cm), and 1 is optical path length.

摘要翻译： 在其核心部分中含有GeO 2 -SiO 2玻璃的光纤玻璃体，其中GeO 2 -SiO 2玻璃在5.16eV处的吸光度为至少1 / mm但不高于2.5 / mm或其中含有Ge2 +的浓度 在GeO2-SiO2玻璃中基本上在1.1×10 -9至2.8×10 -9 mol / mm 3的范围内，通过以下通式计算：A =ε5.16evxC（Ge2 +）x1其中A是由A表示的吸光度 = -log T（T为透射率），每1mm光程长度标准化，C（Ge2 +）为Ge2 +浓度，ε为5.16ev为吸收系数（1 / mol / cm），1为光程长度。

公开(公告)号：US5693115A

公开(公告)日：1997-12-02

申请号：US204100

申请日：1994-03-02

申请人： Masumi Ito ,  Toshio Danzuka ,  Yuichi Ohga ,  Sumio Hoshino ,  Ichiro Tsuchiya

发明人： Masumi Ito ,  Toshio Danzuka ,  Yuichi Ohga ,  Sumio Hoshino ,  Ichiro Tsuchiya

IPC分类号： C03B8/04 ,  C03B20/00 ,  C03B37/014 ,  G02B6/00 ,  C03B37/012

CPC分类号： C03B37/01446

摘要： In order to provide an improved process for the production of a glass preform for an optical fiber which includes substantially no bubble formation therein and also has a substantially uniform shape, the present invention provides a process for the production of a glass preform which is at least partially formed from silica. In particular, a body is formed on a rod by depositing fine glass particles thereon, preferably by the vapor phase reactions, and heating the body to vitrify under a reduced atmosphere or a vacuumed atmosphere so that the glass preform is produced. According to this process, the heating includes a first heating step of degassing the body at a first heating temperature, a second heating step of shrinking the body at a second heating temperature which is higher than the first heating temperature and which is lower than a third heating temperature, and a third heating step of vitrifying the shrunken body at the third temperature which corresponds to a vitrification temperature of the fine glass particles so as to produce the glass preform.

摘要翻译： 为了提供用于生产用于光纤的玻璃预制棒的改进方法，其包括基本上不形成气泡并且还具有基本上均匀的形状，本发明提供了一种用于生产玻璃预制件的方法，所述玻璃预制件至少是 部分由二氧化硅形成。 特别地，通过优选通过气相反应在其上沉积微细玻璃颗粒而在棒上形成主体，并且在还原气氛或真空气氛下将体加热至玻璃化，从而制备玻璃预制件。 根据该方法，加热包括在第一加热温度下使本体脱气的第一加热步骤，在比第一加热温度高于第三加热温度的第二加热温度下使本体收缩的第二加热步骤， 加热温度，第三加热步骤，在与玻璃微细玻璃微粒的玻璃化温度对应的第三温度下使收缩体玻璃化，制成玻璃预制件。