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1. 发明授权

US4874416A Base material of optical fibers and a method for the preparation thereof 失效
标题翻译：光纤基材及其制备方法
公开(公告)号：US4874416A
公开(公告)日：1989-10-17
申请号：US188118
申请日：1988-04-25
申请人： Kiyoshi Yokokawa , Kazuo Koya
发明人： Kiyoshi Yokokawa , Kazuo Koya
IPC分类号： G02B6/00 , C03B8/04 , C03B19/14 , C03B20/00 , C03B37/012 , C03B37/014 , C03B37/018 , G02B6/036
CPC分类号： C03B37/01493 , C03B37/014
摘要： In place of the conventional rod-in-tube method, a novel method is proposed for the preparation of a high-quality base material of quartz glass for optical fibers according to which a glassy rod composed of the core portion of a larger refractive index and the first cladding layer of a smaller refractive index is first prepared by silica soot deposition by the flame hydrolysis of a gaseous silicon compound followed by dehydration and vitrification, and then the glassy rod is covered with a layer of further silica soot deposition which is subsequently converted to the second cladding layer by vitrification. The inventive base material for optical fibers is excellent in the geometry relative to the diameter of the core portion and thickness of the cladding layer as well as concentricity of the core and the cladding.
摘要翻译：代替传统的棒管式方法，提出了一种制备光纤石英玻璃的高质量基材的新方法，根据该方法，由折射率较大的芯部分组成的玻璃棒和首先通过二氧化硅烟灰沉积通过气态硅化合物的火焰水解然后进行脱水和玻璃化来制备较小折射率的第一包层，然后玻璃棒被另外的二氧化硅烟灰沉积层覆盖，随后将其转化通过玻璃化到第二包层。本发明的光纤基材相对于芯部的直径和包层的厚度以及芯和包层的同心度的几何形状优异。

2. 发明授权

US4772644A Method for resin encapsulation of a semiconductor device and a resin composition therefor 失效
标题翻译：半导体装置的树脂封装方法及其树脂组合物
公开(公告)号：US4772644A
公开(公告)日：1988-09-20
申请号：US459220
申请日：1983-01-19
申请人： Kunio Itoh , Kiyoshi Yokokawa , Tetuo Yoshida , Kazuo Koya
发明人： Kunio Itoh , Kiyoshi Yokokawa , Tetuo Yoshida , Kazuo Koya
IPC分类号： H01L23/29 , C01B33/12 , C01B33/18 , C08K3/36 , H01L23/31
CPC分类号： C08K3/36 , C01B33/12 , C01B33/183 , C01P2004/61 , C01P2004/62
摘要： While high-performance semiconductor devices encapsulated with a resin composition are subject to the problem of wrong operation due to the alpha-particles emitted from the trace amounts of radioactive impurities, e.g. uranium and thorium, contained in the silica filler incorporated in the resin composition, a means for solving this problem is provided by use of a silicon dioxide powder obtained by the pyrolysis of a volatilizable silicon compound free from radioactive impurities in an oxidizing condition and having an average particle diameter in the range from 0.5 to 100 .mu.m in place of the conventional silica fillers.
摘要翻译：虽然用树脂组合物封装的高性能半导体器件由于从微量的放射性杂质发射的α粒子，例如，包含在树脂组合物中的二氧化硅填料中的铀和钍通过使用通过在氧化条件下热解不含放射性杂质的挥发性硅化合物而获得的二氧化硅粉末来提供解决该问题的方法，并且具有平均粒径在0.5至100μm的范围内，代替常规的二氧化硅填料。

3. 发明授权

US4690504A Quartz glass-made optical fibers and a method for the preparation thereof 失效
标题翻译：石英玻璃制造的光纤及其制备方法
公开(公告)号：US4690504A
公开(公告)日：1987-09-01
申请号：US739874
申请日：1985-05-31
申请人： Kiyoshi Yokokawa , Kazuo Koya
发明人： Kiyoshi Yokokawa , Kazuo Koya
IPC分类号： C03B37/014 , C03C13/04 , G02B6/00 , G02B6/02
CPC分类号： C03C13/045 , C03B37/014 , C03B37/01446 , G02B6/02 , C03B2201/12 , C03B2203/22
摘要： The quartz glass-made optical fiber of the invention is formed of the core portion and the cladding portion each doped with fluorine to decrease the refractive index, the concentration of fluorine being higher in the cladding than in the core, so that the core portion has a refractive index lower by 0.01 to 0.1% than that of an undoped fused quartz glass and the cladding portion has a refractive index lower by at least 0.2% than that of the core portion. By virtue of the fluorine doping throughout, the optical fiber is free from the drawbacks due to the oxygen deficiency in the fused quartz glass and the light transmission performance thereof is remarkably stable. A method for the preparation of the optical fiber is proposed including the steps of silica particle deposition by the flame hydrolysis of a silicon compound, doping with a fluorine compound and vitrification for each of the core and the cladding portions.
摘要翻译：本发明的石英玻璃制造的光纤由芯部和包层部分形成，每个芯部分和包层部分均掺杂有氟以降低折射率，在包层中氟的浓度高于芯中的浓度，使得芯部具有折射率比未掺杂的熔融石英玻璃的折射率低0.01〜0.1％，折射率比芯部的折射率低0.2％以上。由于整个氟掺杂，光纤没有由于熔融石英玻璃中的氧缺乏而导致的缺点，并且其光透射性能非常稳定。提出了一种制备光纤的方法，包括以下步骤：通过硅化合物的火焰水解沉积二氧化硅颗粒，掺杂氟化合物，并对每个芯和包层部分进行玻璃化。

4. 发明授权

US4608071A Method for reducing diameter of a glass rod or tube by drawing 失效
标题翻译：通过拉丝减小玻璃棒或管的直径的方法
公开(公告)号：US4608071A
公开(公告)日：1986-08-26
申请号：US691984
申请日：1985-01-16
申请人： Kiyoshi Yokokawa , Kazuo Koya , Syouji Hosino
发明人： Kiyoshi Yokokawa , Kazuo Koya , Syouji Hosino
IPC分类号： C03B23/08 , C03B23/047 , C03B37/012 , C03B37/027 , C03B23/13
CPC分类号： C03B23/047 , C03B37/0124 , C03B2205/02
摘要： The invention provides an efficient and accurate method for reducing the diameter of a rod or tube of glass, e.g. fused quartz glass rod as a base material of optical fibers, by drawing when the rod or tube is heated and in a softened and plastically deformable state. Different from conventional methods in which the glass rod or tube is held in a horizontal disposition and drawn in the horizontal axial direction or the rod or tube is held vertically and drawing is effected by the downward movement of the lower grip, the rod or tube in the inventive method is held vertically and drawing thereof is effected by the upward movement of the upper grip along with the gradual downward shift of the heating zone relative to the lower grip so that the problems in the prior art methods such as warp and an uneven diameter profile of the drawn rod or tube can be minimized.
摘要翻译：本发明提供了一种用于减小玻璃棒或管的直径的有效和精确的方法，例如，熔融石英玻璃棒作为光纤的基材，通过在棒或管被加热并且处于软化和塑性变形状态时拉伸。不同于传统方法，其中玻璃棒或管被保持在水平布置中并且在水平轴向方向上被拉伸或者杆或管被垂直地保持并且拉伸是通过下把手的向下运动来实现的，杆或管在本发明的方法被垂直地保持，并且通过上把手的向上运动以及加热区相对于下把手的逐渐向下移动来实现其绘制，使得现有技术方法中的问题如翘曲和不均匀直径拉制的杆或管的轮廓可以最小化。

5. 发明授权

US06549711B1 Soliton pulse compression optical fiber and method for making soliton pulse compression optical fiber 失效
标题翻译：孤子脉冲压缩光纤和孤子脉冲压缩光纤的方法
公开(公告)号：US06549711B1
公开(公告)日：2003-04-15
申请号：US09240593
申请日：1999-02-01
申请人： Tadakatsu Shimada , Kazuo Koya , Noboru Edagawa , Masatoshi Suzuki , Itsuro Morita
发明人： Tadakatsu Shimada , Kazuo Koya , Noboru Edagawa , Masatoshi Suzuki , Itsuro Morita
IPC分类号： G02B602
CPC分类号： G02B6/02247 , C03B37/027 , C03B2203/06 , C03B2203/18 , C03B2203/36 , G02B6/02 , G02B6/02028
摘要： The soliton pulse compression optical fiber comprises a core and a clad that surrounds the core for compressing the injected light pulse in width. The maximum relative index difference between the core and the clad is between about 1.2% and 2.5%. The core diameter of the soliton pulse compression optical fiber varies along the length of the soliton pulse compression optical fiber and the core has a step-like refractive index distribution. The optical fiber perform of the soliton pulse compression optical fiber comprises a core preform, which is to be a core of the soliton pulse compression optical fiber, and a clad preform that surrounds the core preform. The maximum relative index difference between the core perform and the clad preform is also between about 1.2% and 2.5%.
摘要翻译：孤子脉冲压缩光纤包括芯和围绕芯的包层，用于压缩注入的光脉冲的宽度。芯和包层之间的最大相对折射率差在约1.2％至2.5％之间。孤子脉冲压缩光纤的芯直径沿着孤子脉冲压缩光纤的长度变化，并且芯具有阶梯状折射率分布。孤子脉冲压缩光纤的光纤执行包括作为孤子脉冲压缩光纤的核心的芯预制棒和围绕芯预制棒的包层预制棒。核心执行和包层预制件之间的最大相对折射率差异也在约1.2％至2.5％之间。

6. 发明授权

US5440420A Optical amplifier 失效
标题翻译：光放大器
公开(公告)号：US5440420A
公开(公告)日：1995-08-08
申请号：US186294
申请日：1994-01-25
申请人： Tsuneo Mori , Kazuo Koya
发明人： Tsuneo Mori , Kazuo Koya
IPC分类号： G02B6/293 , G02B6/34 , G02F1/35 , H01S3/06 , H01S3/067 , H01S3/07 , H01S3/10 , H01S3/30
CPC分类号： H04B10/291 , H01S3/06754 , H04B10/2912 , G02B6/29332
摘要： Herein disclosed is an optical amplifier which permits sufficient reduction of light-transmission loss when it is incorporated into an optical communication system as a part thereof. The optical amplifier comprises an optical fiber 8 for amplification having a length sufficient for stimulated emission through excitation by an excitation laser beam and sufficient for amplifying a transmitted laser beam; an optical fiber 17 for transmission; and an optical wavelength division multiplexer 6 formed by partially fusing, under drawing conditions, the optical fibers 8 and 17 at a portion in the proximity to the light-incident end of the fiber 8 for amplification. The optical amplifier comprises the optical wavelength division multiplexer 6 formed from a part of the optical fiber 8 for amplification and, therefore, permits substantial reduction in the number of fused portions required for the connection thereof to an optical communication system upon incorporation thereof into the system. For this reason, the connection loss of light can substantially be reduced and accordingly the overall efficiency for amplification is substantially increased.
摘要翻译：这里公开了一种光放大器，其作为其一部分被并入到光通信系统中时可以充分降低光传输损耗。光放大器包括用于放大的光纤8，其具有通过激发激光束激发而受激发射的足够长度并足以放大发射的激光束的长度; 用于传输的光纤17; 以及光纤波分多路复用器6，其在拉伸条件下，在光纤8的光入射端附近的一部分处进行部分熔融而形成，用于放大。光放大器包括由用于放大的光纤8的一部分形成的光波分复用器6，因此，在将光纤通信系统结合到系统中时，允许将其连接到光通信系统所需的熔接部分的数量显着减少。为此，可以显着降低光的连接损耗，从而显着提高放大的整体效率。

7. 发明授权

US5406374A Method for detecting bubbles and inclusions present in optical fiber preform and apparatus for detecting same 失效
标题翻译：用于检测光纤预制件中存在的气泡和夹杂物的方法及其检测装置
公开(公告)号：US5406374A
公开(公告)日：1995-04-11
申请号：US111665
申请日：1993-08-25
申请人： Tadakatsu Shimada , Kazuo Koya
发明人： Tadakatsu Shimada , Kazuo Koya
IPC分类号： G01M11/00 , G01N21/88 , G01N21/93 , G01N21/94 , G01N21/958
CPC分类号： G01M11/37 , G01N21/88 , G01N21/952
摘要： A method and an apparatus for accurately, thoroughly and automatically inspecting an optical fiber preform for the presence of bubbles and/or inclusions are herein provided. The inspection apparatus comprises light source 2 for making light rays incident upon the end face 1a of rod-like optical fiber preform 1 as a subject to be inspected, video camera 7 for photographing the side face of the optical fiber preform 1 and image-processing circuit 11 for discriminating and detecting bubbles and/or inclusions present in the preform 1 through processing of image signals outputted from the video camera 7 and inputted to the circuit 11.
摘要翻译：本文提供了一种准确，彻底和自动地检查光纤预制件以存在气泡和/或夹杂物的方法和装置。检查装置包括：光源2，其用于使入射到棒状光纤预制棒1的端面1a上的光线作为被检查对象;摄像机7，用于拍摄光纤预制棒1的侧面;以及图像处理电路11，用于通过处理从摄像机7输出并输入到电路11的图像信号来识别和检测预制件1中存在的气泡和/或夹杂物。

8. 发明授权

US5260816A Optical amplifier with erbium-doped fiber 失效
标题翻译：具有掺铒光纤的光放大器
公开(公告)号：US5260816A
公开(公告)日：1993-11-09
申请号：US949788
申请日：1992-09-22
申请人： Noboru Edagawa , Yoshihiro Yoshida , Minoru Taya , Kazuo Koya
发明人： Noboru Edagawa , Yoshihiro Yoshida , Minoru Taya , Kazuo Koya
IPC分类号： C03B13/04 , C03C13/04 , G02B6/00 , G02B6/02 , G02F1/35 , H01S3/06 , H01S3/067 , H01S3/10 , H01S3/30
CPC分类号： H01S3/06708
摘要： The optical amplification gain of an optical amplifier consisting of an optical amplifier unit and a single-mode erbium-doped fiber can be optimized when the length of the fiber L in meters and the optical absorption in dB/meter of the fiber per unit length at a wavelength of 1.53 .mu.m satisfy the relationship that L.times.y is in the range from 70 to 170 dB by appropriately selecting the doping level of the glass with erbium and the length of the fiber.

9. 发明授权

US06600857B1 Grating optical fiber, and optical fiber base material suitable for grating 失效
标题翻译：光栅光纤，适用于光栅的光纤基材
公开(公告)号：US06600857B1
公开(公告)日：2003-07-29
申请号：US09604302
申请日：2000-06-26
申请人： Jun Abe , Masayasu Nagaoka , Nobuyasu Mantoku , Kazuo Koya
发明人： Jun Abe , Masayasu Nagaoka , Nobuyasu Mantoku , Kazuo Koya
IPC分类号： G02B634
CPC分类号： C03C13/045 , C03B37/01211 , C03B37/01413 , C03B37/01446 , C03B2201/12 , C03B2201/31 , C03B2203/22 , C03B2203/23 , C03B2203/26 , G02B6/021
摘要： A grating optical fiber comprises a core, a first clad layer formed around the core, and a second clad layer formed around the first clad. Germanium is doped in the core, while germanium and fluorine are doped in the first clad layer. Gratings are formed on both the core and the first clad layer. The difference between the indexes of refraction between the first and second clad layers is smaller than the difference between the indexes of refraction between the core and the first clad layer.
摘要翻译：光栅光纤包括芯，形成在芯周围的第一覆层和围绕第一覆层形成的第二覆层。锗被掺杂在芯中，而锗和氟被掺杂在第一覆层中。在芯和第一包层上形成光栅。第一和第二包覆层之间的折射率之差小于芯与第一包层之间的折射率之差。

10. 发明授权

US5404415A Optical fiber coupler and method for preparing same 失效
标题翻译：光纤耦合器及其制备方法
公开(公告)号：US5404415A
公开(公告)日：1995-04-04
申请号：US186296
申请日：1994-01-25
申请人： Tsuneo Mori , Kazuo Koya
发明人： Tsuneo Mori , Kazuo Koya
IPC分类号： G02B6/28 , G02B6/26
CPC分类号： G02B6/2835
摘要： In an optical fiber coupler comprising a plurality of optical fibers bundled together and a light-coupling portion which is formed by partially fusing and drawing these bundled fibers and which permits branching of light rays incident upon one of these fibers into the other fibers at a predetermined branching ratio, the optical fiber coupler has a difference between the branching ratio thereof determined immediately after the fusing and drawing operation and that determined after accommodating the coupler in a protective case and then adhering it to the case, equal to or less than 5%. Such an optical fiber coupler can be produced by bundling a plurality of optical fibers 1 and 2, fusing and drawing a part of the bundled optical fibers with heating, fixing the relative positions of these optical fibers 1 and 2 immediately after the fusing and drawing operation and then accommodating in and fixing to a protective case. If the foregoing difference in the branching ratio is not more than 5%, the difference between the branching ratios determined after the fusing and drawing operation and determined after the coupler is subjected to a thermal shock test is reduced to a level of not more than 2%. Therefore, the coupler does not suffer from any substantial change in properties even after the thermal shock test and thus can practically be used with high reliability.
摘要翻译：在包括多个捆扎在一起的光纤的光纤耦合器和通过部分地熔合和拉伸这些捆扎的光纤而形成的光耦合部分，并且允许以预定的方式将入射到这些光纤之一的光线分支到另一个光纤中光纤耦合器在定影和拉伸操作之后确定的分支比率之间的差异以及将耦合器容纳在保护壳体中之后确定的分支比率之间的差异，然后将其粘附到壳体上等于或小于5％。这样的光纤耦合器可以通过捆扎多根光纤1和2，通过加热对部分捆扎的光纤进行熔合和拉制来制造，在定影和拉伸操作之后立即固定这些光纤1和2的相对位置然后容纳并固定到保护壳。如果上述分支比的差异不大于5％，则在熔融和拉伸操作之后确定的并且在耦合器之后确定的分支比之间的差异比进行热冲击试验之后，降低至不超过2 ％。因此，即使在热冲击试验之后，耦合器也不会遭受特性的任何显着变化，因此实际上可以高度可靠地使用。

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