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：US5848208A

公开(公告)日：1998-12-08

申请号：US893145

申请日：1997-07-15

申请人： Fumio Suzuki ,  Hideki Sasaki ,  Shigefumi Yamasaki ,  Tomio Abiru ,  Ryozo Yamauchi

发明人： Fumio Suzuki ,  Hideki Sasaki ,  Shigefumi Yamasaki ,  Tomio Abiru ,  Ryozo Yamauchi

IPC分类号： G02B6/28 ,  G02B6/26

CPC分类号： G02B6/2835

摘要： In an optical-fiber coupler formed by disposing two single-mode optical fibers 1 and 2 in parallel, and fusing and elongating the optical fibers at one position in the longitudinal extent of the optical fibers 1 and 2, variation of insertion loss dependent on the polarization can be eliminated in its manufacturing by imparting a twist to the optical coupling part 3' of the fused-elongated portion 3 so that with respect to the direction of a line on a plane orthogonally intersecting the longitudinal direction of the optical fibers 1 and 2, the line linking the centers of the two optical fibers 1 and 2, the direction of the line on a plane at one end of the optical coupling part 3' of the fused-elongated portion 3 makes an angle of 90 degrees with the direction of the line on a plane at the other end of the optical coupling part 3'.

摘要翻译： 在通过平行设置两个单模光纤1和2而形成的光纤耦合器中，并且在光纤1和2的纵向范围内的一个位置处将光纤熔合和伸长，插入损耗的变化取决于 通过对熔融拉长部3的光耦合部3'施加扭曲，使得相对于与光纤1,2的纵向方向正交的平面上的线的方向，可以消除极化 连接两个光纤1和2的中心的线，在熔融拉长部分3的光耦合部分3'的一端的平面上的线的方向与90°的方向成为 在光耦合部分3'的另一端的平面上的线。

公开(公告)号：US5024501A

公开(公告)日：1991-06-18

申请号：US506402

申请日：1990-04-09

申请人： Hiroyuki Taya ,  Mikio Yoshinuma ,  Takeshi Yamada ,  Kenji Nishide ,  Fumio Suzuki ,  Hirohisa Fujimoto ,  Ryozo Yamauchi

发明人： Hiroyuki Taya ,  Mikio Yoshinuma ,  Takeshi Yamada ,  Kenji Nishide ,  Fumio Suzuki ,  Hirohisa Fujimoto ,  Ryozo Yamauchi

IPC分类号： G02B6/28

CPC分类号： G02B6/2843

摘要： The present invention discloses a manufacturing method for polarization maintaining optical fiber couplers which are used for joining light signals and at optical fiber branch points. The disclosed manufacturing method employs polarization maintaining optical fibers, and describes a method for mutually aligning the stress applying parts of such optical fibers so that polarized optical signals are maintained in the polarized state when transiting such couplers.

公开(公告)号：US06463195B1

公开(公告)日：2002-10-08

申请号：US09578271

申请日：2000-05-25

申请人： Hideki Sasaki ,  Ryozo Yamauchi ,  Hiroshi Hidaka ,  Kenji Nishide ,  Shigefumi Yamasaki ,  Ryokichi Matsumoto ,  Yoji Suzuki

发明人： Hideki Sasaki ,  Ryozo Yamauchi ,  Hiroshi Hidaka ,  Kenji Nishide ,  Shigefumi Yamasaki ,  Ryokichi Matsumoto ,  Yoji Suzuki

IPC分类号： G02B626

CPC分类号： G02B6/2835 ,  G02B6/2843

摘要： In a method of manufacturing a polarization-maintaining optical fiber coupler by heating lengthwise portions of two polarization-maintaining optical fibers extending side by side, and elongating the heated portions to thereby form a fused-elongated section, elongation is terminated when the cyclic changes in a coupling ratio of two polarized waves according to an elongation length at a wavelength in use are both within first two cycles, so that the coupling ratio of one of the polarized waves is equal to or less than 10% and the coupling ratio of the other one of the polarized waves is equal to or greater than 90%. This method can provide a polarization-maintaining optical fiber coupler whose coupling ratio has a large dependency on polarization with a short elongation length.

摘要翻译： 在通过加热并排延伸的两个偏振波保持光纤的长度方向制造偏振波保持光纤耦合器的方法，并且延长加热部分从而形成熔融伸长部分，当循环变化 根据使用波长的伸长长度的两个极化波的耦合比都在前两个周期内，使得一个偏振波的耦合比等于或小于10％，另一个的耦合比 偏振波中的一个等于或大于90％。 该方法可以提供一种偏振保持光纤耦合器，其耦合比对短延伸长度的极化具有很大的依赖性。

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：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：US5360464A

公开(公告)日：1994-11-01

申请号：US22479

申请日：1993-02-25

申请人： Ryozo Yamauchi ,  Akira Wada ,  Keiji Oohashi ,  Shinji Araki ,  Tsuyoshi Shimomichi

发明人： Ryozo Yamauchi ,  Akira Wada ,  Keiji Oohashi ,  Shinji Araki ,  Tsuyoshi Shimomichi

IPC分类号： G02B6/255 ,  G02B6/38 ,  C03B37/023

CPC分类号： G02B6/2558 ,  G02B6/2551

摘要： The present invention relates to a method for the fusion splicing of carbon coated optical fibers and to a method for providing reinforced performance of the spliced points. Concretely, carbon coated optical fibers are fusion spliced in an atmosphere containing less than 0.5 vol % of oxygen without the removal of the carbon coating. In order to minimize the amount of damage to the carbon coating resulting from the fusion, the decline in the failure probability of the optical fiber is controlled by means of applying moisture to the spliced part or by means of the adhesion of the oxidized carbon gases to the optical fiber. On the other hand, the carbon coating layer which was removed by oxidation at the time of the fusion splicing is recoated by means of a CVD reaction using a laser as a heat source. By means of this, the decline in the fatigue characteristics of the spliced part can be controlled.

摘要翻译： 本发明涉及一种用于碳涂覆光纤的熔接方法以及用于提供拼接点的加强性能的方法。 具体地说，碳涂覆的光纤在不含碳涂层的情况下，在含有少于0.5体积％的氧气的气氛中熔接。 为了最小化由熔融导致的碳涂层的损害量，通过对接合部分施加水分或通过将氧化的碳气体粘附到...来控制光纤的故障概率的下降 光纤。 另一方面，通过使用激光作为热源的CVD反应重新涂覆在熔接时通过氧化除去的碳涂层。 借此，能够控制拼接部的疲劳特性的下降。

公开(公告)号：US5223014A

公开(公告)日：1993-06-29

申请号：US717800

申请日：1991-06-19

申请人： Ryozo Yamauchi ,  Akira Wada ,  Keiji Oohashi ,  Shinji Araki ,  Tsuyoshi Shimomichi

发明人： Ryozo Yamauchi ,  Akira Wada ,  Keiji Oohashi ,  Shinji Araki ,  Tsuyoshi Shimomichi

IPC分类号： G02B6/255 ,  G02B6/38

CPC分类号： G02B6/2558 ,  G02B6/2551

摘要： The present invention relates to a method for the fusion splicing of carbon coated optical fibers and to a method for providing reinforced performance of the spliced points. Concretely, carbon coated optical fibers are fusion spliced in an atmosphere containing less than 0.5 vol % of oxygen without the removal of the carbon coating. In order to minimize the amount of damage to the carbon coating resulting from the fusion, the decline in the failure probability of the optical fiber is controlled by means of applying moisture to the spliced part or by means of the adhesion of the oxidized carbon gases to the optical fiber. On the other hand, the carbon coating layer which was removed by oxidation at the time of the fusion splicing is recoated by means of a CVD reaction using a laser as a heat source. By means of this, the decline in the fatigue characteristics of the spliced part can be controlled.

公开(公告)号：US07050672B1

公开(公告)日：2006-05-23

申请号：US09638162

申请日：2000-08-14

申请人： Ryokichi Matsumoto ,  Hideki Sasaki ,  Kenji Nishide ,  Ryozo Yamauchi ,  Shigefumi Yamasaki

发明人： Ryokichi Matsumoto ,  Hideki Sasaki ,  Kenji Nishide ,  Ryozo Yamauchi ,  Shigefumi Yamasaki

IPC分类号： G02B6/27

CPC分类号： G02B6/2843 ,  G02B6/105

摘要： A polarization-maintaining optical fiber component which suppresses coupling of propagating light to a high-order mode at the optical coupling section of the polarization-maintaining optical fiber component, caused by different refractive indexes between the stress applying sections and the cladding, thus reducing excess loss, is constructed by using a polarization-maintaining optical fiber having stress applying sections arranged symmetrically to each other with respect to a core in a cladding surrounding the core, wherein the largest one of those concentric circles of the core or the said cladding which do not reach the stress applying sections and do not include the stress applying sections within has a diameter of 20 μm or greater.

摘要翻译： 在偏振保持光纤部件的光耦合部分抑制传播光耦合到高阶模式的偏振保持光纤部件，由应力施加部分和包层之间的不同折射率引起，从而减少了多余的 损耗通过使用具有相对于围绕芯的包层中的芯彼此对称布置的应力施加部分的偏振保持光纤构成，其中芯或所述包层中的最大的一个同心圆做 没有到达应力施加部分，并且不包括其内的应力施加部分具有20μm或更大的直径。