公开(公告)号：US5267339A

公开(公告)日：1993-11-30

申请号：US895480

申请日：1992-06-08

申请人： Ryozo Yamauchi ,  Akira Wada ,  Tetsuo Nozawa ,  Daiichirou Tanaka ,  Tetsuya Sakai

发明人： Ryozo Yamauchi ,  Akira Wada ,  Tetsuo Nozawa ,  Daiichirou Tanaka ,  Tetsuya Sakai

IPC分类号： C03C13/04 ,  C03B37/014 ,  C03B37/025 ,  C03B37/029 ,  G02B6/02

CPC分类号： C03B37/029 ,  C03B37/01413 ,  C03B37/0253 ,  G02B6/02 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/02 ,  C03B2203/06 ,  C03B2203/10 ,  C03B2203/18 ,  C03B2203/24 ,  C03B2203/36 ,  C03B2205/40

摘要： The present invention is directed to an optical fiber comprising a core and a cladding layer wherein at least one of the constitutional parameters thereof changes along the longitudinal direction of the optical fiber. In order to present a useful optical fiber wherein the occurrence of a Brillouin scattering is prevented, an optical fiber having altered constitutional parameters is found to be effective. The constitutional parameters mean the parameters which determine the constitution of the optical fiber and is capable of influencing the condition of electromagnetic wave transmitting therethrough such as light or acoustic wave. The constitutional parameters include diameter of the core, index of refraction of the core, diameter of the optical fiber, composition of the glass, residual stress of the core. Some examples are disclosed about their manufacturing process and the test results. Much improvement was measured, especially in the use for a single mode optical fiber.

公开(公告)号：US5526459A

公开(公告)日：1996-06-11

申请号：US402592

申请日：1995-03-13

申请人： Daiichirou Tanaka ,  Akira Wada ,  Tetsuya Sakai ,  Tetsuo Nozawa ,  Ryozo Yamauchi

发明人： Daiichirou Tanaka ,  Akira Wada ,  Tetsuya Sakai ,  Tetsuo Nozawa ,  Ryozo Yamauchi

IPC分类号： C03B8/04 ,  C03B20/00 ,  C03B37/014 ,  C03C13/04 ,  G02B6/00

CPC分类号： C03B37/01433 ,  C03C13/045 ,  C03B2201/36

摘要： A manufacturing method for erbium doped silica, having a soot formation process, in which a silica glass soot is deposited on a seed rod for forming a soot preform in a porous state on the seed rod, a dopant impregnation process, wherein the soot preform is impregnated with at least an erbium compound, and a preform formation process, wherein this soot preform impregnated with a dopant is heated and rendered transparent. The dopant impregnation process is provided with an operation in which the soot preform obtained in the soot formation process is dipped in a solution containing an erbium compound, an aluminum compound, and a phosphorus compound; this is then desiccated, and soot preform which is impregnated with the erbium compound, the aluminum compound, and the phosphorus compound is obtained.

摘要翻译： 一种铒掺杂二氧化硅的制造方法，其具有烟炱形成方法，其中将硅石烟炱沉积在用于在种棒上形成多孔状态的烟炱预型体的种棒上，掺杂剂浸渍方法，其中所述烟炱预型体为 用至少铒化合物浸渍，以及预成型物形成工艺，其中浸渍有掺杂剂的该烟炱预制件被加热并变得透明。 掺杂剂浸渍方法具有将烟灰形成工艺中获得的烟灰预制件浸入含有铒化合物，铝化合物和磷化合物的溶液中的操作; 然后将其干燥，得到浸渍有铒化合物，铝化合物和磷化合物的烟炱预制品。

公开(公告)号：US5474588A

公开(公告)日：1995-12-12

申请号：US308165

申请日：1994-09-16

申请人： Daiichirou Tanaka ,  Akira Wada ,  Tetsuya Sakai ,  Tetsuo Nozawa ,  Ryozo Yamauchi

发明人： Daiichirou Tanaka ,  Akira Wada ,  Tetsuya Sakai ,  Tetsuo Nozawa ,  Ryozo Yamauchi

IPC分类号： C03B8/04 ,  C03B20/00 ,  C03B37/014 ,  C03C13/04 ,  G02B6/00 ,  C03B37/012

CPC分类号： C03B37/01433 ,  C03C13/045 ,  C03B2201/36

摘要： A manufacturing method for erbium doped silica, having a soot formation process, in which a silica glass soot is deposited on a seed rod for forming a soot preform in a porous state on the seed rod, a dopant impregnation process, wherein the soot preform is impregnated with at least an erbium compound, and a preform formation process, wherein this soot preform impregnated with a dopant is heated and rendered transparent. The dopant impregnation process is provided with an operation in which the soot preform obtained in the soot formation process is dipped in a solution containing an erbium compound, an aluminum compound, and a phosphorus compound; this is then desiccated, and soot preform which is impregnated with the erbium compound, the aluminum compound, and the phosphorus compound is obtained.

摘要翻译： 一种铒掺杂二氧化硅的制造方法，其具有烟炱形成方法，其中将硅石烟炱沉积在用于在种棒上形成多孔状态的烟炱预型体的种棒上，掺杂剂浸渍方法，其中所述烟炱预型体为 用至少铒化合物浸渍，以及预成型物形成工艺，其中浸渍有掺杂剂的该烟炱预制件被加热并变得透明。 掺杂剂浸渍方法具有将烟灰形成工艺中获得的烟灰预制件浸入含有铒化合物，铝化合物和磷化合物的溶液中的操作; 然后将其干燥，得到浸渍有铒化合物，铝化合物和磷化合物的烟炱预制品。

公开(公告)号：US06442313B2

公开(公告)日：2002-08-27

申请号：US09777085

申请日：2001-02-05

申请人： Ryozo Yamauchi ,  Akira Wada ,  Tetsuya Sakai ,  Nobuyuki Tanaka ,  Kensuke Shima ,  Kenji Nishide ,  Shigefumi Yamasaki

发明人： Ryozo Yamauchi ,  Akira Wada ,  Tetsuya Sakai ,  Nobuyuki Tanaka ,  Kensuke Shima ,  Kenji Nishide ,  Shigefumi Yamasaki

IPC分类号： G02B634

CPC分类号： G02B6/02147 ,  G02B6/02095

摘要： An optical fiber grating is manufactured by heating intermittently an optical fiber, provided with a core having residual stress in the longitudinal direction, softening a peripheral cladding of the core, and forming spatial periodical changes for the relative refractive index-difference between the core and the cladding, in the longitudinal direction of the aforementioned optical fiber by having the index of refraction of the core change, through the releasing of the aforementioned residual stress. As a result, an optical fiber grating and the manufacturing method thereof, which do not require expensive equipment and which exhibit high productivity, and furthermore a grating characteristic which is stable over time can be provided.

摘要翻译： 光纤光栅通过间歇地加热设置有在纵向上具有残余应力的芯的光纤，软化芯的外围包层，并且形成芯与芯的相对折射率差的空间周期性变化 通过释放上述残余应力，通过使芯的折射率变化，在上述光纤的长度方向上包覆。 结果，可以提供不需要昂贵的设备并且表现出高生产率的光纤光栅及其制造方法，此外还可以提供一种随时间稳定的光栅特性。

公开(公告)号：US5996375A

公开(公告)日：1999-12-07

申请号：US837958

申请日：1997-04-14

申请人： Michihiro Nakai ,  Kensuke Shima ,  Hiroshi Hidaka ,  Satoshi Okude ,  Masaaki Sudoh ,  Tetsuya Sakai ,  Akira Wada ,  Ryozo Yamauchi

发明人： Michihiro Nakai ,  Kensuke Shima ,  Hiroshi Hidaka ,  Satoshi Okude ,  Masaaki Sudoh ,  Tetsuya Sakai ,  Akira Wada ,  Ryozo Yamauchi

IPC分类号： C03B37/10 ,  G02B5/18

CPC分类号： G02B6/02142 ,  G02B6/02138 ,  G02B6/02152

摘要： A method of producing an optical waveguide grating by exposure to light. An optical waveguide having a core composed of a material wherein the refractive index changes due to exposure to UV light is formed into an optical waveguide grating by applying a grating portion formation step wherein a grating portion is formed by irradiation with UV light at a predetermined spacing, and an overall exposure step after formation of the grating portion wherein the entire grating portion is irradiated with UV light. As a result, the effective refractive index of the grating portion is changed so as to allow the central wavelength to be adjusted without changing the rejection. Consequently, the grating properties can be precisely and easily controlled.

摘要翻译： 一种通过曝光产生光波导光栅的方法。 具有由其中由于暴露于UV光而引起的折射率变化的材料的芯构成的光波导通过施加光栅部分形成步骤形成为光波导光栅，其中通过以预定间隔照射UV光形成光栅部分 ，并且在形成光栅部分之后的整体曝光步骤，其中整个光栅部分被UV光照射。 结果，改变了光栅部分的有效折射率，以便可以调节中心波长而不改变排斥。 因此，可以精确且容易地控制光栅特性。

公开(公告)号：US06298183B1

公开(公告)日：2001-10-02

申请号：US09088630

申请日：1998-06-02

申请人： Ryozo Yamauchi ,  Akira Wada ,  Tetsuya Sakai ,  Nobuyuki Tanaka ,  Kensuke Shima ,  Kenji Nishide ,  Shigefumi Yamasaki

发明人： Ryozo Yamauchi ,  Akira Wada ,  Tetsuya Sakai ,  Nobuyuki Tanaka ,  Kensuke Shima ,  Kenji Nishide ,  Shigefumi Yamasaki

IPC分类号： G02B634

CPC分类号： G02B6/02147 ,  G02B6/02095

摘要： An optical fiber grating is manufactured by heating intermittently an optical fiber, provided with a core having residual stress in the longitudinal direction, softening a peripheral cladding of the core, and forming spatial periodical changes for the relative refractive index-difference between the core and the cladding, in the longitudinal direction of the aforementioned optical fiber by having the index of refraction of the core change, through the releasing of the aforementioned residual stress. As a result, an optical fiber grating and the manufacturing method thereof, which do not require expensive equipment and which exhibit high productivity, and furthermore a grating characteristic which is stable over time can be provided.

摘要翻译： 光纤光栅通过间歇地加热设置有在纵向上具有残余应力的芯的光纤，软化芯的外围包层，并且形成芯与芯的相对折射率差的空间周期性变化 通过释放上述残余应力，通过使芯的折射率变化，在上述光纤的长度方向上包覆。 结果，可以提供不需要昂贵的设备并且表现出高生产率的光纤光栅及其制造方法，此外还可以提供一种随时间稳定的光栅特性。

公开(公告)号：US5732170A

公开(公告)日：1998-03-24

申请号：US734709

申请日：1996-10-21

申请人： Satoshi Okude ,  Tetsuya Sakai ,  Akira Wada ,  Ryozo Yamauchi

发明人： Satoshi Okude ,  Tetsuya Sakai ,  Akira Wada ,  Ryozo Yamauchi

IPC分类号： G02B6/00 ,  G02B5/20 ,  G02B6/02 ,  G02B6/255 ,  G02B6/34 ,  G02B6/38 ,  G02B6/26

CPC分类号： G02B6/29317 ,  G02B6/021 ,  G02B6/02209 ,  G02B6/2551 ,  G02B6/2552 ,  G02B6/2938 ,  G02B6/29332 ,  G02B6/3845

摘要： The present invention relates to an optical fiber filter provided with a portion which selectively reflects or transmits light of a specific wavelength, this portion comprised of a multimode optical fiber in which the refractive index of the core changes periodically along the longitudinal direction thereof. Furthermore, this multimode optical fiber has an input end and an output end, with at least the input end of the multimode optical fiber being connected to a single mode optical fiber. As a result of forming an optical fiber filter in this way, it is possible to realize an optical fiber filter that exhibits no transmission loss at wavelengths other than the center wavelength.

摘要翻译： 本发明涉及一种设置有选择性地反射或透射特定波长的光的部分的光纤滤波器，该部分包括其中芯的折射率沿其纵向方向周期性地变化的多模光纤。 此外，该多模光纤具有输入端和输出端，至少多模光纤的输入端连接到单模光纤。 作为这样形成光纤滤波器的结果，可以实现在中心波长以外的波长下不显示传输损耗的光纤滤波器。

公开(公告)号：US5930437A

公开(公告)日：1999-07-27

申请号：US825912

申请日：1997-04-02

申请人： Michihiro Nakai ,  Kensuke Shima ,  Hiroshi Hidaka ,  Satoshi Okude ,  Masaaki Sudoh ,  Tetsuya Sakai ,  Akira Wada ,  Ryozo Yamauchi

发明人： Michihiro Nakai ,  Kensuke Shima ,  Hiroshi Hidaka ,  Satoshi Okude ,  Masaaki Sudoh ,  Tetsuya Sakai ,  Akira Wada ,  Ryozo Yamauchi

IPC分类号： G02B6/00 ,  G02B6/12 ,  G02B6/122 ,  G02B6/124 ,  G02B6/13 ,  G02B6/10

CPC分类号： G02B6/124 ,  G02B2006/12107 ,  G02B2006/12109

摘要： Core comprises a main stem which is formed on a substrate, linearly extending in the beam propagating direction and short branches with a certain length which extend perpendicularly to the beam propagating direction toward both sides along the plane of the substrate and are arranged at regular intervals in the beam propagating direction. Thus, the branches are arranged in a ladder geometry when it is viewed from the top, forming a rectangular waveform arrangement. The core constitutes a grating structure in which the width of the core is made to vary periodically with the branches in the beam propagating direction.

摘要翻译： 芯部包括形成在基板上的主杆，其在光束传播方向上线性延伸并且具有一定长度的短分支，其沿着基板的平面朝向两侧垂直于光束传播方向延伸，并且以规则的间隔布置 光束传播方向。 因此，当从顶部观察时，分支被布置成梯形几何形状，形成矩形波形布置。 芯构成了光栅结构，其中芯的宽度使光束传播方向上的分支周期性地变化。

公开(公告)号：US5949934A

公开(公告)日：1999-09-07

申请号：US823629

申请日：1997-03-26

申请人： Kensuke Shima ,  Michihiro Nakai ,  Hiroshi Hidaka ,  Kuniharu Himeno ,  Satoshi Okude ,  Akira Wada ,  Masaaki Sudoh ,  Tetsuya Sakai ,  Takuya Ienaka ,  Ryozo Yamauchi

发明人： Kensuke Shima ,  Michihiro Nakai ,  Hiroshi Hidaka ,  Kuniharu Himeno ,  Satoshi Okude ,  Akira Wada ,  Masaaki Sudoh ,  Tetsuya Sakai ,  Takuya Ienaka ,  Ryozo Yamauchi

IPC分类号： G02B6/124 ,  G02B6/34

CPC分类号： G02B6/124 ,  G02B6/021 ,  G02B6/0218 ,  G02B6/0219

摘要： An optical waveguide grating with radiative mode-coupling properties, with exceptional stability and reliability as an optical component, wherein the central wavelength of the rejection band has a low temperature dependence, due to the use of silica glass doped with germanium and boron for the core. The rejection bandwidth can be narrowed without increasing the grating length by forming the radiative mode-coupled optical waveguide grating in an optical waveguide wherein the mean relative refractive index difference of the core is greater than that of optical communication waveguides. The rejection can be increased by reducing the occurrence of cases wherein propagation modes of the core coupled to cladding modes once again couple to the core in palnar optical waveguide gratings formed by making periodic changes in the waveguide structure along the direction of propagation of light in an optical waveguide having a cladding with a lower refractive index than the core surrounding the core, by making the thickness of the cladding at least thirteen times the thickness of the core.

摘要翻译： 具有辐射模耦合特性的光波导光栅作为光学部件具有出色的稳定性和可靠性，其中由于使用掺杂有锗和硼的石英玻璃作为芯，所以抑制带的中心波长具有低的温度依赖性 。 可以通过在光波导中形成辐射模耦合光波导光栅而不增加光栅长度来减小抑制带宽，其中芯的平均相对折射率差大于光通信波导的平均相对折射率差。 可以通过减少与耦合到包层模式的芯的传播模式再次耦合到palnar光波导光栅中的芯的情况的发生的情况下，可以增加抑制，其通过沿着光的传播方向周期性地改变波导结构而形成 光波导具有通过使包层的厚度至少为芯的厚度的十三倍而具有比围绕芯的芯的折射率低的折射率的包层。

公开(公告)号：US5689578A

公开(公告)日：1997-11-18

申请号：US318848

申请日：1994-10-25

申请人： Ryozo Yamauchi ,  Kuniharu Himeno ,  Minoru Sawada ,  Fumio Suzuki ,  Kazuhiko Aikawa ,  Tetsuo Nozawa ,  Shigefumi Yamasaki

发明人： Ryozo Yamauchi ,  Kuniharu Himeno ,  Minoru Sawada ,  Fumio Suzuki ,  Kazuhiko Aikawa ,  Tetsuo Nozawa ,  Shigefumi Yamasaki

IPC分类号： C03B37/012 ,  G02B6/10 ,  G02B6/255 ,  G02B6/28 ,  G02B6/34 ,  H01S3/067

CPC分类号： G02B6/024 ,  C03B37/01217 ,  C03B37/01222 ,  G02B6/02042 ,  G02B6/2843 ,  H01S3/06708 ,  C03B2201/31 ,  C03B2201/36 ,  C03B2203/02 ,  C03B2203/12 ,  C03B2203/22 ,  C03B2203/30 ,  C03B2203/31 ,  C03B2203/34 ,  G02B6/2551 ,  G02B6/2552

摘要： The polarization-maintaining optical fiber 10 of the present invention is designed so that a plurality of core portions 12a,12b which have a high refractive index is provided in parallel along a single diameter direction in the cross section of the optical fiber, these core portions 12a,12b cooperating to propagate a single fundamental mode. In the production method for the polarization-maintaining optical fiber of the present invention, a plurality of holes 22 are formed longitudinally in parallel along a single diameter direction of a glass rod 21 having a low refractive index which forms the cladding, glass rods 23 for core use having a high refractive index which form the core portions are inserted into these holes 22, heating to form a unitary body is carried out, creating a preform which is then drawn. Further, the rare-earth-doped polarization-maintaining optical fiber of the present invention uses a rare earth element to dope the optical waveguide portion of the polarization-maintaining optical fiber, and can be employed in a light amplifier or laser oscillator. Moreover, the polarization-maintaining optical fiber coupler of the present invention is formed by bringing two or more polarization maintaining optical fibers into contact, heating, fusing and elongating them, and heating the vicinity of the connection point before and after connection.

摘要翻译： PCT No.PCT / JP94 / 00300 Sec。 371日期：1994年10月25日 102（e）日期1994年10月25日PCT 1994年2月24日PCT PCT。 第WO94 / 17714号公报 日期1994年9月1日本发明的偏振波保持光纤10被设计成使得在光学部件的横截面中沿着单一直径方向平行设置多个具有高折射率的芯部12a，12b 光纤，这些芯部分12a，12b协作传播单个基本模式。 在本发明的偏振波保持光纤的制造方法中，多个孔22沿着形成包层的折射率低的玻璃棒21的单一直径方向纵向平行地形成，玻璃棒23用于 形成芯部的具有高折射率的芯用途被插入到这些孔22中，进行加热以形成整体，形成预先形成的预成型体。 此外，本发明的稀土掺杂偏振保持光纤使用稀土元素来掺杂保偏光纤的光波导部分，并且可以用在光放大器或激光振荡器中。 此外，本发明的偏振保持光纤耦合器是通过使两个或更多个保偏光纤接触，加热，熔化和拉伸，以及在连接之前和之后加热连接点附近而形成的。