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：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：US06459829B1

公开(公告)日：2002-10-01

申请号：US09497343

申请日：2000-02-03

申请人： Ryozo Yamauchi ,  Akira Wada ,  Kenji Nishide ,  Shigefumi Yamasaki

发明人： Ryozo Yamauchi ,  Akira Wada ,  Kenji Nishide ,  Shigefumi Yamasaki

IPC分类号： G02B628

CPC分类号： H04B10/506 ,  G02B6/02138 ,  G02B6/12011 ,  G02B6/12019 ,  H01S5/4062 ,  H01S5/4087 ,  H04J14/02

摘要： The present invention provides a multiple wavelength excitation light source characterized in the provision of an optical multiplexing element that has a plurality of input terminals connected to lasers and functions to multiplex a plurality of lights that have different characteristics; and a reflecting element inserted near the output side of the output terminal of the optical multiplexing element, and functioning to reflect the light multiplexed at the optical multiplexing element at a low reflection coefficient. Accordingly, it becomes possible to provide high output excitation light in a stable manner.

摘要翻译： 本发明提供一种多波长激发光源，其特征在于提供一种光复用元件，其具有连接到激光器的多个输入端，并且具有多路复用具有不同特性的多个光; 以及反射元件，其插入在光复用元件的输出端的输出侧附近，并且以低反射系数反射在光复用元件处复用的光。 因此，可以稳定地提供高输出激励光。

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。

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：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：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。