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1. 发明授权

US5706124A Rare earth element-doped optical fiber amplifier 失效
标题翻译：稀土元素掺杂光纤放大器
公开(公告)号：US5706124A
公开(公告)日：1998-01-06
申请号：US629593
申请日：1996-04-09
申请人： Katsuyuki Imoto , Kazuo Koya , Jun Abe
发明人： Katsuyuki Imoto , Kazuo Koya , Jun Abe
IPC分类号： G02F1/35 , H01S3/06 , H01S3/067 , H01S3/07 , H01S3/094 , H01S3/10 , H01S3/16 , H01S3/17 , H01S3/30 , G02B6/26
CPC分类号： H04B10/2912 , H01S3/06754 , H04B10/291 , H04B10/294 , H01S2301/02 , H01S2301/04 , H01S3/094096 , H01S3/1608
摘要： An Er-doped multiple-core optical fiber amplifier has an Er-doped multiple-core optical fiber. A signal light of 1.5 .mu.m wavelength band is input through an optical isolator at front stage, and excitation lights of 0.98 .mu.m or 1.48 .mu.m wavelength emitted from excitation light sources are injected through a WDM coupler at front stage and a WDM coupler at rear stage, respectively. An amplified signal light is output through optical isolator at rear stage. A length L.sub.M of the Er-doped multiple-core optical fiber is set to obtain a substantially maximum saturated output power of the amplified signal light.
摘要翻译：掺铒多芯光纤放大器具有掺铒多芯光纤。通过前级光隔离器输入波长1.5μm的信号光，激发光源发射的0.98μm或1.48μm波长的激发光通过前级的WDM耦合器和WDM耦合器注入后期。放大后的信号光通过光隔离器输出。 Er掺杂多芯光纤的长度LM被设定为获得放大的信号光的基本上最大的饱和输出功率。

2. 发明授权

US5712941A Rare earth element-doped multiple-core optical fiber and method for fabricating the same 失效
标题翻译：稀土元素掺杂多芯光纤及其制造方法
公开(公告)号：US5712941A
公开(公告)日：1998-01-27
申请号：US658074
申请日：1996-06-04
申请人： Katsuyuki Imoto , Kazuo Koya , Jun Abe
发明人： Katsuyuki Imoto , Kazuo Koya , Jun Abe
IPC分类号： C03B37/012 , C03B37/014 , C03C13/04 , G02B6/00 , G02B6/02 , G02B6/036 , G02B6/04 , G02F1/35 , H01S3/06 , H01S3/067 , H01S3/07 , H01S3/17
CPC分类号： G02B6/03694 , C03B37/01222 , C03B37/01262 , C03B37/01433 , C03C13/045 , G02B6/03627 , G02B6/04 , H01S3/06708 , C03B2201/36 , C03B2203/22 , C03B2203/34 , C03C2201/36 , G02B6/02042 , G02B6/0281 , H01S3/06729
摘要： A rare earth element-doped multiple-core optical fiber has an outer cladding layer and a plurality of cores each covered with a primary cladding layer. The cores are positioned substantially on a central axis of the outer cladding layer and separated with a predetermined spacing S from each other by the primary cladding layer. The outer cladding layers are made of SiO.sub.2, or SiO.sub.2 added with a dopant like F, Ge, etc. The primary cladding layer is made of SiO.sub.2 doped with Er, or SiO.sub.2 doped with Er and F together and formed to have a predetermined thickness of 1.0 .mu.m.about.1.5 .mu.m to form the predetermined spacing S. The Soot glass rods for cores and primary cladding layers are immersed in an Er-compound solution, then picked up, dried and consolidated to form Er--Al co-doped SiO.sub.2 --GeO.sub.2 transparent glass rods. The glass rods are inserted into a quartz tube and collapsed by heat to fabricate an optical fiber preform rod, then heated to be drawn to provide an Er-doped multiple-core optical fiber.
摘要翻译：稀土元素掺杂多芯光纤具有外包层和多个芯，其各自覆盖有初级包覆层。芯基本上位于外包层的中心轴线上，并以预定间隔S彼此分开由初级包层。外包层由SiO 2或添加有诸如F，Ge等的掺杂剂的SiO 2制成。初始包层由掺杂有Er或SiO 2的SiO或掺杂有Er和F的SiO 2制成，并且形成为具有预定厚度的 1.0微米差异1.5微米以形成预定的间距S.将用于芯和初级包层的烟灰玻璃棒浸入Er-化合物溶液中，然后拾取，干燥并固化以形成Er-Al共掺杂的SiO 2 - GeO2透明玻璃棒。将玻璃棒插入石英管并通过加热折叠以制造光纤预制棒，然后加热以拉伸以提供掺铒多芯光纤。

3. 发明授权

US5570448A Rare earth element-doped multiple-core optical fiber, method for fabricating the same, and optical amplifier using the same 失效
标题翻译：稀土元素掺杂多芯光纤，其制造方法以及使用其的光放大器
公开(公告)号：US5570448A
公开(公告)日：1996-10-29
申请号：US476445
申请日：1995-06-07
申请人： Katsuyuki Imoto , Kazuo Koya
发明人： Katsuyuki Imoto , Kazuo Koya
IPC分类号： G02B6/04 , C03B37/012 , C03B37/028 , G02B6/00 , G02B6/02 , H01S3/06 , H01S3/067 , H01S3/07 , H01S3/10 , H01S3/17
CPC分类号： C03B37/01222 , G02B6/02042 , H01S3/06708 , C03B2201/10 , C03B2201/28 , C03B2201/31 , C03B2201/36 , C03B2203/12 , C03B2203/29 , C03B2203/34 , H01S3/06729 , H01S3/06754
摘要： At least three elementary optical fibers are covered with a jacket layer. Each of the elementary optical fibers has a core of a first refractive index doped with at least one rare earth element and Al, and a cladding layer of a second refractive index lower than the first refractive index for covering the core. A value of (1+2t/Dw) is ranged to be 1.1 to 2.5, where t is a thickness of the cladding layer, and Dw is an outer diameter of the core, and a doping amount of Al is at least 1 weight %. The at least three elementary optical fibers are inserted into a jacket tube, and the elementary optical fibers and the jacket tube are heated to be welded at contact surfaces thereof by vacuum-drawing air from interstices of the elementary optical fibers and the jacket tube. Thus, a preform is obtained, and the preform is heated to be drawn. Consequently, a rare earth element-doped multiple-core optical fiber is fabricated. The rare earth element-doped multiple-core optical fiber is used to amplify a signal light to be propagated therethrough by receiving an excitation light.
摘要翻译：至少三个基本光纤被护套层覆盖。每个基本光纤具有掺杂有至少一种稀土元素和Al的第一折射率的芯和具有低于用于覆盖芯的第一折射率的第二折射率的包层。（1 + 2t / Dw）的值为1.1〜2.5，其中t为包层的厚度，Dw为芯的外径，Al的掺杂量为1重量％以上，。将至少三个基本光纤插入护套管中，并且通过从基本光纤和护套管的间隙抽真空来加热基本光纤和套管，以在其接触表面处焊接基本光纤和护套。因此，获得预制件，并将预成型件加热以拉伸。因此，制造了稀土元素掺杂多芯光纤。稀土元素掺杂多芯光纤用于通过接收激发光来放大要传播的信号光。

4. 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。

5. 发明授权

US5671309A Wide-band optical fiber coupler and method for preparing the same 失效
标题翻译：宽带光纤耦合器及其制备方法
公开(公告)号：US5671309A
公开(公告)日：1997-09-23
申请号：US495932
申请日：1995-06-28
申请人： Jun Abe , Masaaki Shirota , Kazuo Koya
发明人： Jun Abe , Masaaki Shirota , Kazuo Koya
IPC分类号： G02B6/28 , G02B6/26 , G02B6/42
CPC分类号： G02B6/2835 , G02B6/03633 , G02B6/29377
摘要： The object of the present invention is to provide a wide-band optical fiber coupler whose light-branching ratio is independent of the wavelength of light rays to be transmitted therethrough as well as a method for preparing the wide-band optical fiber coupler. When an optical fiber 1 having zero-dispersion at 1.55 .mu.m band and an optical fiber 2 having zero-dispersion at 1.3 .mu.m band are fused and drawn to form a coupled portion 3, a light beam 15 is incident upon the optical fiber 2 and the intensity of the light beam outgoing through either of these optical fibers 2 or 1 is measured to detect the light-branching ratio observed at the coupled portion 3. The drawing operation is interrupted at an instance when the detected light-branching ratio falls within the range of 50.+-.5%.
摘要翻译：本发明的目的是提供一种宽带光纤耦合器，其光分支比率与要透射的光线的波长无关，以及宽带光纤耦合器的制备方法。当在1.55μm带上具有零色散的光纤1和在1.3μm带上具有零色散的光纤2被熔化和拉制以形成耦合部分3时，光束15入射到光纤2上并且测量通过这些光纤2或1中的任一个射出的光束的强度，以检测在耦合部分3处观察到的光分支比。在检测到的光分支比落入内部的情况下，绘制操作被中断范围为50 +/- 5％。

6. 发明授权

US06301412B1 Apparatus and method for making multi-branching optical coupler 失效
标题翻译：制造多分支光耦合器的装置和方法
公开(公告)号：US06301412B1
公开(公告)日：2001-10-09
申请号：US09106019
申请日：1998-06-29
申请人： Tsuneo Mori , Masaaki Shirota , Seiki Ejima , Jun Abe , Sayuri Maeda , Kazuo Koya
发明人： Tsuneo Mori , Masaaki Shirota , Seiki Ejima , Jun Abe , Sayuri Maeda , Kazuo Koya
IPC分类号： G02B626
CPC分类号： G02B6/2856
摘要： A mask having a center hole for passing through a center fiber, which is one of multiple fibers, and multiple surrounding holes for passing through surrounding fibers, which are the remainder of the multiple fibers, and a stress adjusting unit for holding stresses generated in the center fiber and surrounding fibers to a desired constant value, respectively, are installed. The surrounding fibers are rotated around the center fiber by rotating the mask. The center fiber and the surrounding fibers that have been twisted around the center fiber are heated with a heating apparatus and drawn. The center fiber and the surrounding fibers are fixed using a clamp installed between the stress adjusting unit and the heating apparatus.
摘要翻译：具有用于穿过作为多根纤维之一的中心纤维的中心孔的掩模和用于穿过作为多纤维的其余部分的周围纤维的多个环绕孔以及用于保持在所述多个纤维中产生的应力的应力调节单元中心纤维和周围纤维分别安装到所需的恒定值。通过旋转掩模使周围的纤维围绕中心纤维旋转。围绕中心纤维扭转的中心纤维和周围的纤维用加热装置加热并拉伸。中心纤维和周围的纤维使用安装在应力调节单元和加热装置之间的夹具来固定。

7. 发明授权

US6157758A Grating optical fiber, and optical fiber base material suitable for grating 失效
公开(公告)号：US6157758A
公开(公告)日：2000-12-05
申请号：US253724
申请日：1999-02-22
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： G02B6/02 , C03B37/012 , C03B37/014 , C03C13/04 , G02B6/34
CPC分类号： C03C13/045 , C03B37/01211 , C03B37/01413 , C03B37/01446 , G02B6/021 , C03B2201/12 , C03B2201/31 , C03B2203/22 , C03B2203/23 , C03B2203/26
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.

8. 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。

9. 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。

10. 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。

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