公开(公告)号：US07366366B2

公开(公告)日：2008-04-29

申请号：US10572251

申请日：2004-09-16

申请人： Yusuke Takei ,  Hiromi Ajima ,  Michitaka Okuta

发明人： Yusuke Takei ,  Hiromi Ajima ,  Michitaka Okuta

IPC分类号： G02B6/00

CPC分类号： G01B11/165 ,  G01B11/18

摘要： To provide a low-cost FBG sensing device having a high reliability, suitable for high-speed measurement such as vibration measurement, able to perform a remote measurement, and simple data processing, the FBG sensing device comprising one or more light sources each outputting a light having fixed output wavelength, one or more fiber-Bragg gratings each having a reflection wavelength band having an attenuation band where the magnitude of reflection attenuates with distance from the center wavelength, the fiber-Bragg gratings reflecting the lights output from said light sources, light receiving units corresponding said fiber-Bragg gratings respectively and receiving the light reflected by the corresponding fiber-Bragg grating, wherein intensities of reflected lights each of which changes corresponding to the attenuation band that changes due to a distortion produced at each of the fiber-Bragg gratings are detected to detect the distortions.

摘要翻译： 为了提供具有高可靠性的低成本FBG感测装置，适用于诸如振动测量的高速测量，能够进行远程测量和简单的数据处理，FBG感测装置包括一个或多个光源，每个光源输出 具有固定输出波长的光，一个或多个光纤布拉格光栅，每个光纤布拉格光栅具有反射波长带，其具有衰减带，其中反射幅度随距离中心波长的距离衰减，反射从所述光源输出的光的光纤布拉格光栅， 光接收单元分别对应所述光纤布拉格光栅并接收由对应的光纤布拉格光栅反射的光，其中每个反射光的强度对应于由于在每个光纤布拉格光栅处产生的失真而改变的衰减带改变， 检测布拉格光栅以检测失真。

公开(公告)号：US06658189B2

公开(公告)日：2003-12-02

申请号：US09828299

申请日：2001-04-05

申请人： Hiromi Ajima ,  Yusuke Takei ,  Yukiko Furukata ,  Michitaka Okuta

发明人： Hiromi Ajima ,  Yusuke Takei ,  Yukiko Furukata ,  Michitaka Okuta

IPC分类号： G02B602

CPC分类号： H01S3/06754 ,  G02B6/2835

摘要： A broadband ASE light source is provided which comprises an amplifying optical fiber doped with rare earth; a pumping light source and an output port both which are connected to one end of the amplifying optical fiber via a multiplexer; and a reflecting or circulating member which is connected to the other end of the amplifying optical fiber, whereby the amplifying optical fiber emits ASE light containing a first and second wavelength bands through the port. Particularly, a second pumping light source may be connected to the other end of the amplifying optical fiber via another multiplexer to widen the wavelength band to longer wavelength side. Further, using the amplifying Er-doped optical fiber with the pumping light sources having wavelength of a 980 nm band, the ASE light source can emit a flattened broadband of 1530 to 1610 nm, combining the two wavelength bands of 1530 to 1570 mn and 1570 to 1610 nm. The input power supplied for the amplifying fiber from the second pumping light source may be less than 20% of the input power supplied for the amplifying fiber from the first pumping light source.

摘要翻译： 提供宽带ASE光源，其包括掺杂有稀土的放大光纤; 泵浦光源和输出端口，两者都经由多路复用器连接到放大光纤的一端; 以及连接到放大光纤的另一端的反射或循环构件，由此放大光纤通过端口发射包含第一和第二波长带的ASE光。 特别地，第二泵浦光源可以经由另一多路复用器连接到放大光纤的另一端，以将波长带宽化到更长的波长侧。 此外，使用具有波长为980nm波段的泵浦光源的放大Er掺杂光纤，ASE光源可以发射1530至1610nm的平坦宽带，将1530至1570nm和1570nm的两个波长带组合 至1610nm。 从第二泵浦光源提供给放大光纤的输入功率可以小于为来自第一泵浦光源的放大光纤提供的输入功率的20％。

公开(公告)号：US20070053626A1

公开(公告)日：2007-03-08

申请号：US10572251

申请日：2004-09-16

申请人： Yusuke Takei ,  Hiromi Ajima ,  Michitaka Okuta

发明人： Yusuke Takei ,  Hiromi Ajima ,  Michitaka Okuta

IPC分类号： G02B6/34

CPC分类号： G01B11/165 ,  G01B11/18

摘要： To provide a low-cost FBG sensing device having a high reliability, suitable for high-speed measurement such as vibration measurement, able to perform a remote measurement, and simple data processing, the FBG sensing device comprising one or more light sources each outputting a light having fixed output wavelength, one or more fiber-Bragg gratings each having a reflection wavelength band having an attenuation band where the magnitude of reflection attenuates with distance from the center wavelength, the fiber-Bragg gratings reflecting the lights output from said light sources, light receiving units corresponding said fiber-Bragg gratings respectively and receiving the light reflected by the corresponding fiber-Bragg grating, wherein intensities of reflected lights each of which changes corresponding to the attenuation band that changes due to a distortion produced at each of the fiber-Bragg gratings are detected to detect the distortions.

摘要翻译： 为了提供具有高可靠性的低成本FBG感测装置，适用于诸如振动测量的高速测量，能够进行远程测量和简单的数据处理，FBG感测装置包括一个或多个光源，每个光源输出 具有固定输出波长的光，一个或多个光纤布拉格光栅，每个光纤布拉格光栅具有反射波长带，其具有衰减带，其中反射幅度随距离中心波长的距离衰减，反射从所述光源输出的光的光纤布拉格光栅， 光接收单元分别对应所述光纤布拉格光栅并接收由对应的光纤布拉格光栅反射的光，其中每个反射光的强度对应于由于在每个光纤布拉格光栅处产生的失真而改变的衰减带改变， 检测布拉格光栅以检测失真。

公开(公告)号：US06208457B1

公开(公告)日：2001-03-27

申请号：US09220874

申请日：1998-12-23

申请人： Michitaka Okuta ,  Hiromi Ajima

发明人： Michitaka Okuta ,  Hiromi Ajima

IPC分类号： H01S300

CPC分类号： G02B6/2835 ,  H01S3/094003

摘要： In an optical amplifier wherein pumping laser light and signal laser light are multiplexed and supplied as input to a fiber doped with a rare earth element, by decreasing the number of connected sections, loss due to the connection to the rare earth-doped fiber is decreased, thereby to improve the amplifying characteristics and to simplify the production step. a pair of fibers, each which is connected by a transmitting optical fiber 1 and a rare earth-doped fiber 4, at a connected sections, are heated and fused with each other are aligned in part length to a fused jointed portion 3 which is stretched in the vicinity of the connected section 2 on the rare earth-doped fiber side, thereby forming an optical coupler.

摘要翻译： 在将激光和信号激光的激光多路复用并作为输入提供给掺杂有稀土元素的光纤的光放大器中，通过减少连接部分的数量，由于与稀土掺杂光纤的连接而引起的损耗减少 从而提高放大特性并简化生产步骤。 在连接部分通过发射光纤1和稀土掺杂光纤4连接的一对光纤被加热并彼此熔合，部分长度对准被拉伸的熔接部3 在稀土掺杂光纤侧的连接部2附近，形成光耦合器。

公开(公告)号：US5410626A

公开(公告)日：1995-04-25

申请号：US81479

申请日：1993-06-23

申请人： Michitaka Okuta ,  Tetsuya Suga ,  Akio Tsugawa ,  Kiyohiko Kuramoto

发明人： Michitaka Okuta ,  Tetsuya Suga ,  Akio Tsugawa ,  Kiyohiko Kuramoto

IPC分类号： G02B6/28 ,  G02B6/34 ,  G02B6/00 ,  G02B6/26

CPC分类号： G02B6/29332 ,  G02B6/2835 ,  G02B6/2856

摘要： An optical coupler having a tapered fused region produced by locally heating the periphery of a plurality of aligned optical fibers, each having a core and a cladding, so that the optical fibers fuse together at the heated part, and then drawing the resulting fused region by pulling. The length of the fused region is not longer than 10 mm. The tapered fused region may be provided in such a manner that a plurality of optical fibers are disposed to intersect each other at a predetermined angle, and the intersecting portions are locally heated so as to fuse together and then subjected to pulling. The tapered fused region may be provided at each of two or more positions. Also disclosed is an optical coupler wherein at least one of a plurality of optical fibers each having a core and a cladding is previously heat-treated at a high temperature to enlarge the core in a portion thereof, and the enlarged-core portion of this optical fiber is fused to the other optical fibers and then subjected to pulling, thereby forming a tapered fused region.

摘要翻译： 一种具有锥形熔融区域的光耦合器，其通过局部加热多个对准的光纤的周边而产生，每个具有芯和包层，使得光纤在加热部分处熔合在一起，然后通过 拉扯 熔融区域的长度不大于10mm。 锥形熔融区域可以以使得多个光纤以预定角度彼此相交的方式设置，并且交叉部分被局部加热以熔合在一起然后进行拉伸。 可以在两个或更多个位置中的每一个处设置锥形熔合区域。 还公开了一种光耦合器，其中每个具有芯和包层的多个光纤中的至少一个预先在高温下进行热处理以在其一部分中扩大芯部，并且该光学器件的放大芯部分 纤维与其他光纤熔合，然后进行拉伸，从而形成锥形的熔融区域。

公开(公告)号：US06992825B2

公开(公告)日：2006-01-31

申请号：US10746531

申请日：2003-12-24

申请人： Michitaka Okuta

发明人： Michitaka Okuta

IPC分类号： G02B5/18

CPC分类号： G02B6/4246 ,  G02B5/1871 ,  G02B6/2931 ,  G02B6/29311

摘要： In a volume phase grating, a plurality of phase gratings for causing a refractive index of a substrate having an incident surface and a launched surface facing each other to be cyclically changed between the incident surface and the launched surface are so formed as to be inclined at a specified angle to the incident surface. The volume phase grating is constructed such that an incident light is caused to be obliquely incident on the incident surface, and an angle of inclination of the phase gratings to the incident surface is set such that the incident light obliquely incident on the incident surface is refracted at the incident surface and perpendicularly incident on the phase gratings.

摘要翻译： 在体积相位光栅中，使入射面和彼此面对的基板的折射率在入射面和被投射面之间循环变化的多个相位光栅被形成为倾斜于 与入射面的指定角度。 体积相位光栅被构造为使得入射光被倾斜入射在入射表面上，并且相位光栅相对于入射表面的倾斜角度被设定为使得倾斜入射在入射表面上的入射光被折射 在入射面上并垂直入射在相位光栅上。

公开(公告)号：US20050220163A1

公开(公告)日：2005-10-06

申请号：US11091303

申请日：2005-03-28

申请人： Michitaka Okuta ,  Yoshiyuki Shigeoka

发明人： Michitaka Okuta ,  Yoshiyuki Shigeoka

IPC分类号： G02B5/26 ,  G02B6/02 ,  G02B6/34 ,  G02B6/42 ,  G02F1/025 ,  H01S3/08 ,  H01S5/00 ,  H01S5/022 ,  H01S5/024 ,  H01S5/026 ,  H01S5/10 ,  H01S5/125 ,  H01S5/14

CPC分类号： G02B6/4206 ,  G02B6/02085 ,  G02B6/02138 ,  G02B6/29319 ,  G02B6/4203 ,  H01S5/005 ,  H01S5/0064 ,  H01S5/02216 ,  H01S5/02284 ,  H01S5/02415 ,  H01S5/02438 ,  H01S5/141 ,  H01S5/146

摘要： An external resonator is provided with a fiber having a fiber Bragg grating for reflecting light of a specific wavelength and a ferrule which holds the above described fiber inside thereof. At least some phase gratings from among the respective phase gratings that form fiber Bragg grating are inclined relative to the optical axis of the fiber.

摘要翻译： 外部谐振器设置有具有用于反射特定波长的光的光纤布拉格光栅的光纤和在其内保持上述光纤的套圈。 来自形成光纤布拉格光栅的各个相位光栅中的至少一些相位光栅相对于光纤的光轴倾斜。

公开(公告)号：US5402260A

公开(公告)日：1995-03-28

申请号：US919283

申请日：1992-07-24

申请人： Yukiko Tsuneda ,  Michitaka Okuta ,  Yasushi Sato

发明人： Yukiko Tsuneda ,  Michitaka Okuta ,  Yasushi Sato

IPC分类号： G02B27/28 ,  G02B6/42 ,  G02F1/09 ,  H01S3/00 ,  H01S5/40

CPC分类号： G02B6/4208 ,  G02F1/093 ,  H01S5/4025 ,  G02B6/2746 ,  H01S3/0064 ,  H01S5/0064 ,  Y10S359/90 ,  Y10S372/703

摘要： An element for an optical isolator which is formed by alternately bonding together at least one flat plate-shaped Faraday rotator and two or more flat plate-shaped polarizers, the optical isolator element having an outer peripheral surface which is cut such that, when the outer peripheral surface is disposed parallel to an optical axis, incidence and emergence planes of the element are inclined at a predetermined angle with respect to a plane perpendicular to the optical axis. The optical isolator element may be formed with a rectangular configuration in conformity to the arranged form of a plurality of laser active regions of a laser array.

摘要翻译： 光隔离器的元件，其通过交替地将至少一个平板状法拉第转子和两个或多个平板状偏振器交替地结合在一起形成，所述光隔离元件具有被切割的外周面， 外周表面平行于光轴设置，元件的入射面和出射平面相对于垂直于光轴的平面倾斜一预定角度。 光隔离器元件可以形成为与激光器阵列的多个激光有源区域的排列形式一致的矩形配置。

公开(公告)号：US5802224A

公开(公告)日：1998-09-01

申请号：US447331

申请日：1995-05-22

申请人： Michitaka Okuta ,  Kiyohiko Kuramoto

发明人： Michitaka Okuta ,  Kiyohiko Kuramoto

IPC分类号： G02B6/28 ,  G02B6/34 ,  G02B6/26

CPC分类号： G02B6/34 ,  G02B2006/2865

摘要： A separate mount type optical coupler having composite functions in which, of a plurality of optical fibers (f.sub.1, f.sub.2 and f.sub.3) arranged side by side, adjacent fibers are fusion-welded and extended at a plurality of places so as to provide, for example, a light mixing/branch-filtering function and a branching/coupling function individually, and the fusion-welded and extended portions are separately fixedly mounted, whereby connection portions and excessive length processing are eliminated.

摘要翻译： 具有复合功能的单独的安装型光耦合器，其中在多个位置上并排布置的多个光纤（f1，f2和f3）在多个位置被熔焊并延伸，以便提供例如 ，光混合/分支滤波功能和分支/耦合功能，并且熔接和延伸部分分别固定地安装，从而消除了连接部分和过长的处理。

公开(公告)号：US5452122A

公开(公告)日：1995-09-19

申请号：US740297

申请日：1991-08-05

申请人： Tukiko Tsuneda ,  Michitaka Okuta ,  Yasushi Sato

发明人： Tukiko Tsuneda ,  Michitaka Okuta ,  Yasushi Sato

IPC分类号： G02B27/28 ,  G02B6/42 ,  G02F1/09 ,  H01S3/00 ,  H01S5/40 ,  G02B5/30

CPC分类号： G02B6/4208 ,  G02F1/093 ,  H01S5/4025 ,  G02B6/2746 ,  H01S3/0064 ,  H01S5/0064 ,  Y10S359/90 ,  Y10S372/703

摘要： An element for an optical isolator which is formed by alternately bonding together at least one flat plate-shaped Faraday rotator and two or more flat plate-shaped polarizers, the optical isolator element having an outer peripheral surface which is cut such that, when the outer peripheral surface is disposed parallel to an optical axis, incidence and emergence planes of the element are inclined at a predetermined angle with respect to a plane perpendicular to the optical axis. The optical isolator element is accommodated in a cylindrical magnet having an inner peripheral surface of the same shape as the outer peripheral surface of the optical isolator element, thereby forming an optical isolator.

摘要翻译： 光隔离器的元件，其通过交替地将至少一个平板状法拉第转子和两个或多个平板状偏振器交替地结合在一起形成，所述光隔离元件具有被切割的外周面， 外周表面平行于光轴设置，元件的入射面和出射平面相对于垂直于光轴的平面倾斜一预定角度。 光隔离器元件容纳在具有与光隔离元件的外周面相同形状的内周面的圆筒形磁体中，从而形成光隔离器。