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1. 发明授权

US5320658A Process of drawing optical fiber 失效
标题翻译：绘制光纤的工艺
公开(公告)号：US5320658A
公开(公告)日：1994-06-14
申请号：US921991
申请日：1992-08-03
申请人： Yuichi Ohga , Shinji Ishikawa , Hiroo Kanamori , Ichiro Yoshimura , Horoshi Yokota
发明人： Yuichi Ohga , Shinji Ishikawa , Hiroo Kanamori , Ichiro Yoshimura , Horoshi Yokota
IPC分类号： G02B6/00 , C03B37/027 , C03B37/029 , C03B37/023
CPC分类号： C03B37/02718 , C03B37/029 , C03B2205/56 , C03B2205/63 , Y02P40/57
摘要： There is provided a process of melt drawing an optical fiber from a preform therefor in which a heating furnace comprising a muffle tube inside thereof through which the optical fiber is passed is provided immediately below a melt drawing furnace to further draw the optical fiber while heated, and an interior of the muffle tube is kept in an atmosphere selected from the group consisting of an inert atmosphere, an atmosphere comprising oxygen gas and an atmosphere comprising hydrogen gas.
摘要翻译：提供了一种从其预成型件熔融拉伸光纤的方法，其中在熔融拉拔炉的正下方设置包括其中通过光纤的马弗管的加热炉，以在加热下进一步拉伸光纤，并且马弗管的内部保持在选自惰性气氛，包含氧气和包含氢气的气氛的气氛中的气氛中。

2. 发明授权

US5446820A Mode field diameter conversion optical fiber 失效
标题翻译：模场直径转换光纤
公开(公告)号：US5446820A
公开(公告)日：1995-08-29
申请号：US98908
申请日：1993-07-29
申请人： Shinji Ishikawa , Hiroo Kanamori , Koji Nakazato , Masayuki Nishimura , Yuichi Ohga
发明人： Shinji Ishikawa , Hiroo Kanamori , Koji Nakazato , Masayuki Nishimura , Yuichi Ohga
IPC分类号： G02B6/02 , G02B6/14 , G02B6/255 , G02B6/10
CPC分类号： G02B6/2552
摘要： An object of this invention is to provide a mode field diameter conversion optical fiber which can be processed in a short period of time to have a reduced mode field diameter at a desired portion thereof. The optical fiber according to this invention comprises a core of silica glass having a residual tensile stress, and a cladding surrounding the core and having a lower refractive index than that of the core. The desired portion is heated to relax the residual tensile stress in the core, whereby the optical fiber has a reduced mode field diameter at the desired portion.
摘要翻译：本发明的目的是提供一种可以在短时间内处理以在其期望部分具有减小的模场直径的模场直径转换光纤。根据本发明的光纤包括具有残余拉伸应力的石英玻璃芯和围绕芯的包层，并且折射率低于芯的折射率。加热所需部分以松弛芯中的残余拉伸应力，由此光纤在期望部分具有减小的模场直径。

3. 发明授权

US5306322A Process for thermal treatment of glass fiber preform 失效
标题翻译：玻璃纤维预制件热处理工艺
公开(公告)号：US5306322A
公开(公告)日：1994-04-26
申请号：US924767
申请日：1992-07-24
申请人： Shinji Ishikawa , Yuichi Ohga , Ichiro Tsuchiya , Hiroo Kanamori , Hiroshi Yokota , Michihisa Kyoto
发明人： Shinji Ishikawa , Yuichi Ohga , Ichiro Tsuchiya , Hiroo Kanamori , Hiroshi Yokota , Michihisa Kyoto
IPC分类号： G02B6/00 , C03B37/014 , C03B37/023
CPC分类号： C03B37/01446 , C03B37/0146 , C03B2201/07 , C03B2201/075 , C03B2201/12 , Y10S65/16 , Y10S65/90
摘要： The present invention providesa process for the dehydrating and purifying treatment by heating a porous glass preform for an optical fiber comprising passing the porous glass preform through a muffle tube having a SiC layer at least on its inner surface at a high temperature under an atmosphere comprising an inert gas and a silicon halogenide gas;a process for the fluorine-doping treatment by heating a porous glass preform for an optical fiber comprising passing a porous glass preform through a muffle tube having a SiC layer at least on its inner surface at a high temperature under an atmosphere comprising a fluorine compound gas and an inert gas; anda process for the vitrifying treatment by heating a porous glass preform for an optical fiber comprising passing the preform, which has been previously dehydrated and purified, through a muffle tube having a SiC layer at least on its inner surface at a high temperature under an atmosphere gas.
摘要翻译：本发明提供了一种通过加热用于光纤的多孔玻璃预制件进行脱水和净化处理的方法，包括使多孔玻璃预制件通过具有SiC层的马弗管至少在其内表面上在高温下在包括惰性气体和卤化硅气体; 通过加热用于光纤的多孔玻璃预制件进行氟掺杂处理的方法，包括使多孔玻璃预制件通过具有SiC层的马弗管至少在其内表面上在高温下在包含氟化合物气体和惰性气体; 以及通过加热用于光纤的多孔玻璃预制件进行玻璃化处理的方法，包括使预先脱水和净化的预成型体至少在其内表面上通过具有SiC层的马弗管在高温下气氛气体。

4. 发明授权

US5259856A Method of producing glass preform in furnace for heating glass 失效
标题翻译：在玻璃加热炉中生产玻璃预制件的方法
公开(公告)号：US5259856A
公开(公告)日：1993-11-09
申请号：US891913
申请日：1992-06-01
申请人： Yuichi Ohga , Shinji Ishikawa , Hiroo Kanamori , Ichiro Tsuchiya , Hiroshi Yokota
发明人： Yuichi Ohga , Shinji Ishikawa , Hiroo Kanamori , Ichiro Tsuchiya , Hiroshi Yokota
IPC分类号： C03B37/014
CPC分类号： C03B37/01446 , C03B37/0146 , C03B2201/12 , C03B2203/22 , Y10S65/16 , Y10S65/90
摘要： A heating furnace for heating a porous preform made of fine particles of quartz base glass for an optical fiber which comprises a heater and a muffle tube positioned inside the heater to separate a heating atmosphere from the heater, wherein the muffle tube body consists of highly pure carbon and an inner wall and an outer wall of the body is coated with a carbon material selected from the group consisting of pyrolytic graphite and solid-phase carbonized glassy carbon.
摘要翻译：一种加热炉，用于加热由用于光纤的石英基底玻璃的微细颗粒制成的多孔预成型件，该多孔预制件包括位于加热器内部的加热器和马弗管，以将加热气体与加热器分离，其中马弗管体由高纯度碳和主体的内壁和外壁涂覆有选自热解石墨和固相碳化玻璃碳的碳材料。

5. 发明授权

US5106401A Process for thermal treatment of glass fiber preform 失效
标题翻译：玻璃纤维预热器的热处理工艺
公开(公告)号：US5106401A
公开(公告)日：1992-04-21
申请号：US544942
申请日：1990-06-28
申请人： Shinji Ishikawa , Yuichi Ohga , Ichiro Tsuchiya , Hiroo Kanamori , Hiroshi Yokota , Michihisa Kyoto
发明人： Shinji Ishikawa , Yuichi Ohga , Ichiro Tsuchiya , Hiroo Kanamori , Hiroshi Yokota , Michihisa Kyoto
IPC分类号： G02B6/00 , C03B37/014
CPC分类号： C03B37/01446 , C03B37/0146 , C03B2201/07 , C03B2201/075 , C03B2201/12 , Y10S65/16 , Y10S65/90
摘要： The present invention providesa process for the dehydrating and purifying treatment by heating a porous glass preform for an optical fiber by passing the porous glass preform through a muffle tube having a SiC layer at least on its inner surface at a high temperature under an atmosphere containing an inert gas and a silicon halogenide gas;a process for the fluorine-doping treatment by heating a porous glass preform for an optical fiber by passing a porous glass preform through a muffle tube having a SiC layer at least on its inner surface at a high temperature under an atmosphere containing a fluorine compound gas and an inert gas; anda process for the vitrifying treatment by heating a porous glass preform for an opticla fiber by passing the preform, which has been previously dehydrated and purified, through a muffle tube having a SiC layer at least on its inner surface at a high temperature under an atmosphere gas.

6. 发明授权

US5238479A Method for producing porous glass preform for optical fiber 失效
标题翻译：光纤多孔玻璃预制棒的制造方法
公开(公告)号：US5238479A
公开(公告)日：1993-08-24
申请号：US984734
申请日：1992-12-04
申请人： Yuichi Ohga , Toshio Danzuka , Hiroo Kanamori , Hiroshi Yokota
发明人： Yuichi Ohga , Toshio Danzuka , Hiroo Kanamori , Hiroshi Yokota
IPC分类号： C03B37/014
CPC分类号： C03B37/0142 , C03B2201/31 , C03B2203/22 , C03B2203/26 , C03B2207/06 , C03B2207/20 , C03B2207/24 , C03B2207/26 , C03B2207/28 , C03B2207/50
摘要： The invention is a method for producing a porous preform for use in the fabrication of an optical fiber at least two burners synthesize glass soot particles, one of which generates a double-layer flame and one of which is used for forming a core part of the preform. The method comprises the steps of supplying SiCl.sub.4 and optionally GeCl.sub.4 to the inner flame of the double-layer flame, and only SiCl.sub.4 to an outer flame of the double-layer flame to flame hydrolyze the supplied compounds and synthesize glass soot particles. Compounds SiCl.sub.4 and GeCl.sub.4 as glass-forming raw materials are supplied to the burner for forming the core part of the preform by depositing the generated glass soot particles on the lower end of a rotating starting member. The generated porous preform comprises a core part containing at least partly GeO.sub.2, and a surface having a low concentration of GeO.sub.2 which reduces cracking or peeling.
摘要翻译：本发明是用于制造用于制造光纤的多孔预制棒的方法，至少两个燃烧器合成玻璃烟灰颗粒，其中一个产生双层火焰，其中一个用于形成预制件。该方法包括以下步骤：向双层火焰的内部火焰提供SiCl 4和任选的GeCl 4，并且仅将SiCl 4与双层火焰的外部火焰直接火焰水解所提供的化合物并合成玻璃烟灰颗粒。作为玻璃形成原料的化合物SiCl4和GeCl4通过将生成的玻璃烟灰颗粒沉积在旋转起始构件的下端而供给到用于形成预成型体的芯部的燃烧器。生成的多孔预制件包括至少部分含有GeO 2的核心部分和具有低浓度GeO 2的表面，其减少开裂或剥离。

7. 发明授权

US06490078B2 Optical fiber for optical amplifier, optical fiber amplifier and optical fiber laser 有权
标题翻译：光放大器光纤，光纤放大器和光纤激光器
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。

8. 发明授权

US06400878B1 Optical fiber and method of making the same 有权
标题翻译：光纤及其制作方法
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。

9. 发明授权

US5474589A UV light-permeable glass and article comprising the same 失效
标题翻译： UV透光玻璃及其制品
公开(公告)号：US5474589A
公开(公告)日：1995-12-12
申请号：US226413
申请日：1994-04-12
申请人： Yuichi Ohga , Shinji Ishikawa , Tatsuhiko Saito , Hiroshi Yokota , Michihisa Kyoto
发明人： Yuichi Ohga , Shinji Ishikawa , Tatsuhiko Saito , Hiroshi Yokota , Michihisa Kyoto
IPC分类号： G02B1/02 , C03B19/12 , C03C3/06 , C03C3/112 , C03C4/00 , G02B6/02 , C03B37/018
CPC分类号： C03C4/0085 , C03B19/12 , C03C3/06 , G02B6/02 , C03B2201/12 , C03C2201/12 , C03C2203/44 , C03C2203/54 , Y02P40/57
摘要： A UV light-permeable optical glass consisting of a fluorine-doped synthetic quartz glass, which has a long term reliability.
摘要翻译：一种由氟掺杂的合成石英玻璃组成的紫外透光光学玻璃，具有长期的可靠性。

10. 发明授权

US5763081A Glass body for optical fiber method of selecting the same optical fiber and method of making thereof 失效
标题翻译：用于选择相同光纤的光纤的玻璃体及其制造方法
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。

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