公开(公告)号：US06845636B2

公开(公告)日：2005-01-25

申请号：US09943418

申请日：2001-08-31

申请人： Takashi Yamazaki ,  Takashi Kogo ,  Yuichi Ohga ,  Tadashi Enomoto

发明人： Takashi Yamazaki ,  Takashi Kogo ,  Yuichi Ohga ,  Tadashi Enomoto

IPC分类号： G02B6/00 ,  C03B37/014 ,  C03B37/012

CPC分类号： C03B37/0146 ,  Y10S65/90

摘要： A dehydration and consolidation furnace and a dehydration and consolidation method in which gas in a chamber does not leak to a furnace body room and gas in a furnace body room does not leak into a chamber is provided. A furnace of one embodiment of this invention has first muffle tube 3 and second muffle tube 4. The second muffle tube 4 is arranged coaxially around the first muffle tube 3. An optical fiber preform is arranged in this furnace. During the dehydration and consolidation process the pressure of the intermediate room 10 is set lower than a pressure inside the first muffle tube and outside the second muffle tube, and a gas supply and exhaust of the intermediate room 10 are performed independent of the gas supply and exhaust of the first muffle tube and a furnace body room.

摘要翻译： 提供了一种脱水和固结炉以及室内的气体不会泄漏到炉体室并且在炉体室中的气体不会泄漏到室中的脱水和固化方法。 本发明的一个实施例的炉子具有第一马弗管3和第二马弗管4。第二马弗管4同轴地布置在第一马弗管3的周围。光纤预制件布置在该炉中。 在脱水和固结过程中，中间室10的压力被设定为低于第一马弗管内部和第二马弗管外部的压力，中间室10的供气和排气独立于气体供应和 第一马弗管和炉体室的排气。

公开(公告)号：US06301936B1

公开(公告)日：2001-10-16

申请号：US09334925

申请日：1999-06-17

申请人： Yuichi Ohga ,  Takashi Kogo

发明人： Yuichi Ohga ,  Takashi Kogo

IPC分类号： C03B2000

CPC分类号： C23C16/453 ,  C03B37/01406 ,  C23C16/44 ,  Y02P40/57

摘要： The object of the invention is to provide an apparatus for manufacturing a porous glass preform, which comprises a reaction vessel in which local stress concentration caused by expansion due to heat is prevented, and there is no fear of the occurrence of deformation or cracks. The apparatus of this invention manufactures the porous glass preform by depositing glass particles blown from a burner on the seed rod rotating around its axis, and this apparatus is characterized in that the reaction vessel is provided with a means for relieving concentration of stress due to thermal expansion of the reaction vessel.

摘要翻译： 本发明的目的是提供一种用于制造多孔玻璃预制件的装置，其包括反应容器，其中防止由热引起的膨胀引起的局部应力集中，并且不会发生变形或裂纹。 本发明的装置通过将从燃烧器吹出的玻璃颗粒沉积在围绕其轴线旋转的晶棒上制造多孔玻璃预制件，该装置的特征在于，反应容器设置有用于缓解因热而引起的应力集中的装置 反应容器的膨胀。

公开(公告)号：US07143608B2

公开(公告)日：2006-12-05

申请号：US10791826

申请日：2004-03-04

申请人： Tadashi Enomoto ,  Yuichi Ohga ,  Nobuya Akaike ,  Haruhiko Aikawa ,  Takashi Matsuo ,  Motonori Nakamura

发明人： Tadashi Enomoto ,  Yuichi Ohga ,  Nobuya Akaike ,  Haruhiko Aikawa ,  Takashi Matsuo ,  Motonori Nakamura

IPC分类号： C03B19/06

CPC分类号： C03B37/0142 ,  C03B19/106 ,  C03B19/1423 ,  C03B2207/06 ,  C03B2207/08 ,  C03B2207/20 ,  C03B2207/22 ,  C03B2207/36 ,  C03B2207/40 ,  C03B2207/42 ,  Y02P40/57

摘要： A concentric multi-tubular burner for synthesizing glass particles having a center port group constituted by a combination of jet ports of raw material gas, combustible gas and oxygen gas, wherein an outer wall of the oxygen gas jet port in the center port group protrudes more toward a burner head than an inner wall of the oxygen gas jet port. The flow rate of oxygen gas jetted from the oxygen gas jet port of the center port group is controlled to be in a proper range.

公开(公告)号：US06490078B2

公开(公告)日：2002-12-03

申请号：US09809301

申请日：2001-03-16

申请人： Tadashi Enomoto ,  Masahiro Takagi ,  Yuichi Ohga ,  Motoki Kakui ,  Shinji Ishikawa ,  Masakazu Shigehara ,  Shinji Endo

发明人： Tadashi Enomoto ,  Masahiro Takagi ,  Yuichi Ohga ,  Motoki Kakui ,  Shinji Ishikawa ,  Masakazu Shigehara ,  Shinji Endo

IPC分类号： G02B634

CPC分类号： H01S3/06708 ,  H01S3/06716 ,  H01S3/06729 ,  H01S3/06754

摘要： The present invention relates to an OFA having a high signal gain, easily manufactured, having a high mechanical strength, having a small splice loss with respect to other optical fibers, and rarely encountering the occurrence of noise at a signal wavelength. The OFA according to the present invention has a function of amplifying signals propagating therethroug by pumping light supplied thereto, and comprises, at least, a core region, an inner cladding region provided on the periphery of the core region, an outer cladding region provided on the periphery of the inner cladding region, and one or more node coupling gratings. An element for signal amplification is added to at least the core region. The core region has a structure ensuring a core mode with respect to the signals, while the inner cladding region has a structure ensuring a multi-mode with respect to the pumping light. Each of the mode coupling gratings passes core mode signals therethrough, and induces a mode coupling between the inner cladding mode and the core mode with respect to the pumping light.

摘要翻译： 本发明涉及具有高机械强度，易于制造的具有高信号增益，相对于其它光纤具有小的接合损耗，并且很少遇到在信号波长处的噪声的发生的OFA。 根据本发明的OFA具有通过泵送供给到其上的光来传播传播的信号的功能，并且至少包括芯区域，设置在芯区域周围的内包层区域，设置在芯区域 内包层区域的周边，以及一个或多个节点耦合光栅。 用于信号放大的元件至少加到核心区域。 芯区域具有确保相对于信号的芯模式的结构，而内包层区域具有确保相对于泵浦光的多模式的结构。 每个模式耦合光栅通过芯模信号，并且相对于泵浦光在内包层模式和芯模之间引起模耦合。

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：US06807823B2

公开(公告)日：2004-10-26

申请号：US10298924

申请日：2002-11-19

申请人： Yuichi Ohga ,  Tadashi Enomoto

发明人： Yuichi Ohga ,  Tadashi Enomoto

IPC分类号： C03C306

CPC分类号： C03C23/0025 ,  C03B19/1423 ,  C03B19/1453 ,  C03B2201/07 ,  C03B2201/075 ,  C03B2201/12 ,  C03B2207/30 ,  C03B2207/32 ,  C03B2207/36 ,  C03B2207/70 ,  C03C3/06 ,  C03C2201/11 ,  C03C2201/12 ,  C03C2201/23 ,  C03C2203/54

摘要： A process for producing fluorine-containing glass. An SiO2 soot is synthesized by hydrolyzing SiCl4. The soot is heated in a chlorine-compound-free atmosphere containing a fluorine compound gas to form a fluorine-containing silica glass. The glass contains not more than 10 ppm OH group, not more than 10 ppm Cl, and not less than 1,000 ppm F. The concentration ratio of F/Cl is 10,000 or more.

摘要翻译： 含氟玻璃的制造方法。 通过水解SiCl4合成SiO 2烟炱。 烟灰在含氟化合物气体的无氯化合物的气氛中加热，形成含氟二氧化硅玻璃。 该玻璃含有不超过10ppm的OH基团，不超过10ppm的Cl，且不小于1,000ppm F.F / Cl的浓度比为10,000以上。

公开(公告)号：US06725690B2

公开(公告)日：2004-04-27

申请号：US09952502

申请日：2001-09-14

申请人： Tadashi Enomoto ,  Yuichi Ohga ,  Nobuya Akaike ,  Haruhiko Aikawa ,  Takashi Matsuo ,  Motonori Nakamura

发明人： Tadashi Enomoto ,  Yuichi Ohga ,  Nobuya Akaike ,  Haruhiko Aikawa ,  Takashi Matsuo ,  Motonori Nakamura

IPC分类号： C03B37018

CPC分类号： C03B37/0142 ,  C03B19/106 ,  C03B19/1423 ,  C03B2207/06 ,  C03B2207/08 ,  C03B2207/20 ,  C03B2207/22 ,  C03B2207/36 ,  C03B2207/40 ,  C03B2207/42 ,  Y02P40/57

摘要： A concentric multi-tubular burner for synthesizing glass particles having a center port group constituted by a combination of jet ports of raw material gas, combustible gas and oxygen gas, wherein an outer wall of the oxygen gas jet port in the center port group protrudes more toward a burner head than an inner wall of the oxygen gas jet port. The flow rate of oxygen gas jetted from the oxygen gas jet port of the center port group is controlled to be in a proper range.

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。