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：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：US06867910B2

公开(公告)日：2005-03-15

申请号：US10132081

申请日：2002-04-23

申请人： Yusuke Takei ,  Hiromi Ajima ,  Yukiko Furukata

发明人： Yusuke Takei ,  Hiromi Ajima ,  Yukiko Furukata

IPC分类号： H01S3/067 ,  H01S3/00

CPC分类号： H01S3/067 ,  H01S3/06795

摘要： Provided is a wideband ASE light source, which has a high output and a little ripples in a wide band and the output of which is stable. In a wideband ASE light source constructed of a pumping light source that generates a pumping light, an erbium-doped optical fiber that generates an ASE light by incident pumping light, a reflector that is arranged at one terminal portion of the erbium-doped optical fiber and reflects the ASE light radiated from the erbium-doped optical fiber, an optical multiplexer that is arranged between a terminal portion of the erbium-doped optical fiber and the pumping light and optically multiplexes and demultiplexes the pumping light with or from the ASE light and an optical isolator that is arranged between the third terminal portion of the optical multiplexer and an output terminal and removes a return light to the erbium-doped optical fiber, the optical multiplexer has a maximum value of isolation in a wavelength band of 1570 nm to 1600 nm.

摘要翻译： 提供了宽带ASE光源，其宽输出具有高输出和小波纹，其输出稳定。 在由产生泵浦光的泵浦光源构成的宽带ASE光源中，通过入射泵浦光产生ASE光的掺铒光纤，配置在掺铒光纤的一端部的反射器 并且反射从掺铒光纤辐射的ASE光，布置在掺铒光纤的端子部分和泵浦光之间的光学多路复用器，并且与ASE光进行光学多路复用和解复用激发光，并且 布置在光复用器的第三端子部分和输出端子之间的光隔离器，并且去除掺铒光纤的返回光，光复用器具有在1570nm至1600nm的波长带中的最大隔离度 nm。

公开(公告)号：US06406197B1

公开(公告)日：2002-06-18

申请号：US09579785

申请日：2000-05-26

申请人： Michitaka Okuda ,  Hiromi Ajima ,  Yusuke Takei ,  Hiroshi Fujimoto ,  Kazuyuki Miyake ,  Tatsuhiro Kawamura ,  Yasuhide Sudo

发明人： Michitaka Okuda ,  Hiromi Ajima ,  Yusuke Takei ,  Hiroshi Fujimoto ,  Kazuyuki Miyake ,  Tatsuhiro Kawamura ,  Yasuhide Sudo

IPC分类号： G02B6255

CPC分类号： G02B6/2835 ,  H01S3/06708 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/1601 ,  H01S3/1603

摘要： An optical fiber coupler for optical fiber amplifier use in the field of optical communications is provided. The optical fiber coupler comprises: a rare earth-doped fiber as an optical amplifying element; a quasi rare earth-doped fiber for entrance of input signal light; a fused-stretch fiber portion as a multiplexing element which connects a part of the rare earth-doped fiber and a parts the quasi rare earth-doped fiber, wherein the fused-stretch fiber portion formed by stretched a fused mixture of parts of the rare earth-doped fiber and the quasi rare earth-doped fiber; and a single mode fiber which is jointed at a fused joint portion to another shortened rare earth-doped fiber connected to the fused-stretch fiber portion on a side connected by the quasi rare earth-doped fiber. The quasi rare earth-doped fiber has substantially equal propagation constant to the rare earth-doped fiber without substantially containing rare earth elements. The optical fiber coupler is fabricated by the steps of jointing a single mode fiber with a rare earth-doped fiber by fusing abutted end faces of both fibers to form a combined fiber; and fusing parallel contact parts of a quasi rare earth-doped fiber and of the rare earth-doped fiber of the combined fiber and then elongating the fused parts in a desired diameter to form a fused-stretch fiber portion.

摘要翻译： 提供了一种用于光通信领域的光纤放大器的光纤耦合器。 光纤耦合器包括：作为光放大元件的稀土掺杂光纤; 用于输入信号光入射的准稀土掺杂光纤; 熔融拉伸纤维部分作为将稀土掺杂纤维的一部分与准稀土掺杂纤维部分连接的多路复用元件，其中通过将稀有部分的熔融混合物拉伸而形成的熔融拉伸纤维部分 掺杂稀土的光纤和准稀土掺杂光纤; 以及在熔融接合部分处连接到另一个缩短的稀土掺杂光纤的单模光纤，该稀土掺杂光纤在与稀土掺杂光纤连接的一侧连接到熔融拉伸纤维部分。 准稀土掺杂光纤具有与稀土掺杂光纤基本相等的传播常数，而基本上不含稀土元素。 通过以下步骤制造光纤耦合器：通过将两个光纤的接合端面融合以形成组合光纤，将单模光纤与稀土掺杂光纤接合; 将准稀土掺杂纤维和混合纤维的稀土掺杂纤维的平行接触部分熔合，然后将熔融部分延伸到所需直径以形成熔融拉伸纤维部分。

公开(公告)号：US06536238B2

公开(公告)日：2003-03-25

申请号：US09956428

申请日：2001-09-20

申请人： Toshiyasu Kawaguchi ,  Koji Obayashi ,  Misao Okada ,  Yusuke Takei

发明人： Toshiyasu Kawaguchi ,  Koji Obayashi ,  Misao Okada ,  Yusuke Takei

IPC分类号： C03B516

CPC分类号： C03B5/2252

摘要： When molten glass which is under an atmosphere of pressure P, is fed into a vacuum chamber capable of rendering a pressure to the molten glass to be in a range of 38 [mmHg]-(P-50) [mmHg] to perform degassing to the molten glass, a staying time of the molten glass in the vacuum chamber is in a range of 0.12-4.8 hours, whereby there is obtainable an effective degassing function to the molten glass.

公开(公告)号：US06470710B1

公开(公告)日：2002-10-29

申请号：US09549345

申请日：2000-04-13

申请人： Yusuke Takei ,  Kenji Oda

发明人： Yusuke Takei ,  Kenji Oda

IPC分类号： C03B500

CPC分类号： C03C1/004 ,  C03B5/225 ,  C03B5/235 ,  C03B5/2353 ,  Y02P40/535 ,  Y02P40/55 ,  Y02P40/57

摘要： Glass raw material is fed to a glass furnace to prepare molten glass. At least one metal compound from one of the following metals: aluminum, titanium, silicon, zinc, magnesium, iron, chromium, cobalt, cerium or calcium is supplied to a foam layer formed on the molten glass to diminish or extinguish the foam layer.

摘要翻译： 将玻璃原料进料到玻璃熔炉中以制备熔融玻璃。 向形成在熔融玻璃上的泡沫层供给至少一种以下金属之一的金属化合物：铝，钛，硅，锌，镁，铁，铬，钴，铈或钙，以消除或消除泡沫层。

公开(公告)号：US06318126B1

公开(公告)日：2001-11-20

申请号：US09327680

申请日：1999-06-08

申请人： Yusuke Takei ,  Masataka Matsuwaki ,  Michito Sasaki ,  Takashi Kijima ,  Atsushi Tanigaki

发明人： Yusuke Takei ,  Masataka Matsuwaki ,  Michito Sasaki ,  Takashi Kijima ,  Atsushi Tanigaki

IPC分类号： C03B5225

CPC分类号： C03B5/2252 ,  C03B5/205 ,  C03C1/004

摘要： A vacuum degassing method for molten glass, which comprises introducing molten glass into a vacuum degassing apparatus, subjecting it to degassing treatment under a predetermined reduced pressure condition and then withdrawing it for a subsequent step, wherein during the degassing treatment, a metal compound which is at least one compound of metal selected from the group consisting of aluminum, titanium, silicon, zinc, magnesium, iron, chromium, cobalt, cerium and calcium, is supplied from outside of the vacuum degassing apparatus to the surface of a bubble layer formed in the molten glass to diminish or extinguish the bubble layer.

摘要翻译： 一种用于熔融玻璃的真空脱气方法，其包括将熔融玻璃引入真空脱气装置中，在预定的减压条件下对其进行脱气处理，然后将其抽出用于随后的步骤，其中在脱气处理期间， 从真空脱气装置的外部将至少一种选自铝，钛，硅，锌，镁，铁，铬，钴，铈和钙的金属化合物供给到形成于 熔融玻璃减少或消除气泡层。

公开(公告)号：US06308534B1

公开(公告)日：2001-10-30

申请号：US09322993

申请日：1999-06-01

申请人： Yusuke Takei ,  Shigekuni Inoue ,  Michito Sasaki ,  Yasuharu Hirabara ,  Atsushi Tanigaki ,  Mitsuo Sugimoto

发明人： Yusuke Takei ,  Shigekuni Inoue ,  Michito Sasaki ,  Yasuharu Hirabara ,  Atsushi Tanigaki ,  Mitsuo Sugimoto

IPC分类号： C03B500

CPC分类号： C03B5/2252 ,  C03B5/205 ,  Y02P40/57

摘要： Molten glass has a liquid level located at a higher level than lower ends of an uprising pipe and a downfalling. In addition, a contacting portion of the uprising pipe or the downfalling pipe and a brick receiver on an upstream or downstream pit for supporting the uprising or downfalling pipe, or a joint in the brick receiver is filled with sealing material.

公开(公告)号：US20060176111A1

公开(公告)日：2006-08-10

申请号：US11346268

申请日：2006-02-03

申请人： Yusuke Takei

发明人： Yusuke Takei

IPC分类号： H03F1/14

CPC分类号： H04R3/00 ,  H03G3/348

摘要： To provide an electronic device comprising an audio mute control circuit for preventing the occurrence of a “click noise” even in “power supply shutdown” not caused by the input of a power switch. An audio mute control circuit 70 is provided which outputs a mute signal to an audio processing circuit 80 based on an audio mute control signal from a microcomputer 30 and a power fail signal from a power failure detection circuit 20 for detecting the presence or absence of power supply from an external power supply, so that when the power fail signal from the power failure detection circuit 20 indicates “no power supply,” the audio processing circuit 80 is muted regardless of the operation of the microcomputer 30. Thus, it is possible to prevent the occurrence of a “click noise” from speakers 90 in “power supply shutdown” not caused by the input of a power switch.

摘要翻译： 为了提供一种电子设备，其包括音频静音控制电路，即使在由电源开关的输入引起的“电源关闭”中也防止发生“咔嗒声”。 提供一种音频静音控制电路70，其基于来自微型计算机30的音频静音控制信号和来自电源故障检测电路20的用于检测电力的存在或不存在的电力故障信号，向音频处理电路80输出静音信号 从外部电源供给，使得当来自电源故障检测电路20的电源故障信号指示“无电源”时，无论微计算机30的操作如何，音频处理电路80都被静音。因此，可以 防止由于电源开关的输入引起的“电源关闭”中的扬声器90发生“点击噪音”。