公开(公告)号：US4408831A

公开(公告)日：1983-10-11

申请号：US295311

申请日：1981-08-24

申请人： Haruo Sakaguchi ,  Norio Seki ,  Shu Yamamoto ,  Hiroharu Wakabayashi

发明人： Haruo Sakaguchi ,  Norio Seki ,  Shu Yamamoto ,  Hiroharu Wakabayashi

IPC分类号： G02B6/35 ,  G02B26/08 ,  H04B10/00 ,  H04B10/032 ,  H04B10/077 ,  H04B10/079 ,  H04B10/27 ,  G05D25/00

CPC分类号： G02B6/3512 ,  G02B26/08 ,  H04B10/032 ,  G02B6/3546 ,  G02B6/3572 ,  G02B6/358 ,  G02B6/3598

摘要： An optical switch for switching laser beams, having a transparent glass plate with a reflection film on the surface of the same has been found. When the reflection film is at the first position, the first input beam is coupled with the output beam through the transparent glass plate, while the second input beam is prevented by said reflection film. When the reflection film is at the second position, the first input beam is prevented by said reflection film, and the second input beam is coupled with the output beam through the reflection by said reflection film. Thus, according to the displacement of the transparent glass plate together with the reflection film, the input beams are switched. Due to the above operational principle, the output optical level does not decrease even during the transient time, and then, the present optical switch is utilized in an optical repeater for digital communication.

摘要翻译： 已经发现了用于切换激光束的光学开关，其具有在其表面上具有反射膜的透明玻璃板。 当反射膜处于第一位置时，第一输入光束通过透明玻璃板与输出光束耦合，而第二输入光束被所述反射膜阻止。 当反射膜位于第二位置时，通过所述反射膜防止第一输入光束，并且第二输入光束通过所述反射膜的反射与输出光束耦合。 因此，根据透明玻璃板与反射膜的位移，切换输入光束。 由于上述操作原理，即使在瞬态时间期间，输出光电位也不会降低，然后将本光开关用于用于数字通信的光中继器。

公开(公告)号：US20100037963A1

公开(公告)日：2010-02-18

申请号：US12593996

申请日：2008-09-22

申请人： Shu Yamamoto

发明人： Shu Yamamoto

IPC分类号： B01J4/00 ,  B67D7/78 ,  G01F23/00

CPC分类号： G01F23/00 ,  B01J4/008 ,  Y10T137/0324 ,  Y10T137/7303

摘要： A process-liquid supply part includes: a supply tank configured to contain a process liquid; a level gauge pipe connected to the supply tank, the level gauge pipe being provided with level sensors for detecting a remaining amount of the process liquid contained in the supply tank; and a measuring part configured to measure a remaining amount of the process liquid based on signals from the level sensors provided on the level gauge pipe. Connected to the supply tank are a process-liquid supply pipe configured to drain the process liquid contained in the supply tank, and a process-liquid return pipe configured to introduce the process liquid drained through the process-liquid supply pipe to the supply tank. A connection pipe, in which an openable and closable valve is provided, disposed between the process-liquid supply pipe or the process-liquid return pipe and the level gauge pipe.

摘要翻译： 处理液供给部包括：供给槽，其配置成容纳处理液; 液位计管连接到供应罐，液位计管设有液位传感器，用于检测包含在供应罐中的处理液的剩余量; 以及测量部，其被配置为基于来自设置在液位计管上的液位传感器的信号来测量处理液的剩余量。 与供给罐连接的是处理液供给管，其配置为排出供给槽中所含有的处理液，以及处理液返回管，其配置为将通过处理液供给管排出的处理液引入供给槽。 设置在处理液供给管或处理液返回管与液位计管之间的连接管，其中设置有可开闭阀。

公开(公告)号：US20050099976A1

公开(公告)日：2005-05-12

申请号：US10947880

申请日：2004-09-22

申请人： Shu Yamamoto ,  Carl Williams ,  Hidetoshi Yokota ,  Kazuo Hashimoto

发明人： Shu Yamamoto ,  Carl Williams ,  Hidetoshi Yokota ,  Kazuo Hashimoto

IPC分类号： H04L12/56 ,  H04L12/46 ,  H04L12/66 ,  H04L29/06 ,  H04L29/12 ,  H04J3/24

CPC分类号： H04L29/12009 ,  H04L12/4633 ,  H04L29/12207 ,  H04L61/20 ,  H04L69/16 ,  H04L69/161 ,  H04W36/0011 ,  H04W80/04 ,  H04W80/045

摘要： A mobile dual-stack node engages in IPv6 communication while roaming within an IPv4-only network. The node determines that it has moved and obtains a new IPv4 address. After determining that the visited network contains no IPv6-enabled components, the node communicates with a tunnel broker to obtain a care-of address and a tunnel to an IPv6 connect agent (e.g., a tunnel server). If the obtained care-of address differs from the care-of address that the node had been using prior to the move, the node sends MIPv6 binding updates to its home agent and corresponding peers. The node can optimize the handoff when it has obtained a different care-of address by sending a binding update to the connect agent comprising the previous care-of address and the current care-of address. When the connect agent receives a packet destined for the previous care-of address, it forwards the packet to the current care-of address.

摘要翻译： 移动双栈节点在仅在IPv4网络中漫游时进行IPv6通信。 节点确定它已经移动并获得新的IPv4地址。 在确定被访问网络不包含启用IPv6的组件之后，节点与隧道代理通信以获得转交地址和到IPv6连接代理（例如，隧道服务器）的隧道。 如果获取的转交地址不同于节点在移动之前已经使用的转交地址，则节点向其归属代理和对应的对等体发送MIPv6绑定更新。 当节点通过向包括先前转交地址和当前转交地址的连接代理发送绑定更新而获得不同转交地址时，节点可以优化切换。 当连接代理接收到去往以前转交地址的数据包时，它会将数据包转发到当前转交地址。

公开(公告)号：US06556325B1

公开(公告)日：2003-04-29

申请号：US09507233

申请日：2000-02-18

申请人： Yukio Horiuchi ,  Masatoshi Suzuki ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Yukio Horiuchi ,  Masatoshi Suzuki ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： H04B1002

CPC分类号： H04B10/2916 ,  H04B10/0777 ,  H04B2210/074

摘要： An optical repeater monitoring system, according to the invention, comprises an oscillating source, a reference signal transmitter for transmitting a reference signal of a predetermined frequency generated from an output of the oscillating source to a first optical fiber, and an optical repeater. The optical repeater has a first photodetector for converting light from the first optical fiber into an electrical signal, a reference signal extractor for extracting a component of the reference signal from an output of the first photodetector, a carrier generator for generating a carrier from an output of the reference signal extractor, a monitor signal modulator for modulating the carrier generated by the carrier generator with a monitor signal showing a operating state of the optical repeater, a transmitter for transmitting an output of the monitor signal modulator to a second optical fiber. The system further comprises a demodulating signal generator for generating a demodulating signal from either of the output from the oscillating source and the reference signal, the demodulating signal having a frequency equal to that of the monitor signal carrier, a second photodetector for photodetecting the light propagated on the second fiber, and a monitor signal demodulator for demodulating the monitor signal from outputs of the second photodetector and demodulating signal generator.

摘要翻译： 根据本发明的光中继器监视系统包括振荡源，参考信号发射器，用于将从振荡源的输出产生的预定频率的参考信号传输到第一光纤，以及光中继器。 光中继器具有用于将来自第一光纤的光转换成电信号的第一光电检测器，用于从第一光电检测器的输出提取参考信号的分量的参考信号提取器，用于从输出端产生载波的载波发生器 参考信号提取器的监视信号调制器，用于利用示出所述光中继器的操作状态的监视信号调制由所述载波发生器产生的所述载波的监视信号调制器，用于将所述监视信号调制器的输出发送到第二光纤的发射器。 该系统还包括解调信号发生器，用于从振荡源的输出和参考信号中的任一个产生解调信号，解调信号的频率等于监视信号载波的频率;第二光电检测器，用于光检测传播的光 以及用于从第二光电检测器和解调信号发生器的输出解调监视信号的监视信号解调器。

公开(公告)号：US06504638B1

公开(公告)日：2003-01-07

申请号：US09206512

申请日：1998-12-07

申请人： Keiji Tanaka ,  Noboru Edagawa ,  Hidenori Taga ,  Shu Yamamoto

发明人： Keiji Tanaka ,  Noboru Edagawa ,  Hidenori Taga ,  Shu Yamamoto

IPC分类号： H04B1016

CPC分类号： H04B10/294 ,  H04J14/0221

摘要： To increase the number of multiplexed wavelengths and to improve transmission characteristics in a wavelength-division-multiplexed transmission, a bandwidth compressor for bandwidth-compressing the wavelength-division-multiplexed signal light is disposed at a front part of respective optical amplifiers and a bandwidth expander for bandwidth-expanding the wavelength-division-multiplexed signal light output from said optical amplifiers is disposed at a rear part of said optical amplifiers.

摘要翻译： 为了增加复用波长的数量并改善波分复用传输中的传输特性，用于带宽压缩波分复用信号光的带宽压缩器被布置在各个光放大器的前部，带宽扩展器 为了带宽扩展，从所述光放大器输出的波分复用信号光布置在所述光放大器的后部。

公开(公告)号：US06459518B1

公开(公告)日：2002-10-01

申请号：US09329867

申请日：1999-06-11

申请人： Masatoshi Suzuki ,  Noboru Edagawa ,  Hidenori Taga ,  Shu Yamamoto

发明人： Masatoshi Suzuki ,  Noboru Edagawa ,  Hidenori Taga ,  Shu Yamamoto

IPC分类号： H04B1000

CPC分类号： H04B10/532

摘要： A laser diode continuously laser-oscillates and its output light is applied to an optical modulator. A pulse driver drives the optical modulator according to a data to be transmitted. A phase modulator is driven by a phase modulator driver and phase-modulates the output from the optical modulator. The polarization direction of the incident light of the phase modulator is set so that the modulation efficiency of the phase modulator becomes the maximum. The output light of the phase modulator inputs a birefringent medium and applies to an optical transmission line after transmitting the birefringent medium. The principal axis of the birefringent medium is disposed so as to be at an angle of 45° to the polarization direction of the output light from the phase modulator.

摘要翻译： 激光二极管连续激光振荡，其输出光被施加到光学调制器。 脉冲驱动器根据要发送的数据驱动光调制器。 相位调制器由相位调制器驱动器驱动并对来自光调制器的输出进行相位调制。 相位调制器的入射光的偏振方向被设定为使得相位调制器的调制效率达到最大。 相位调制器的输出光输入双折射介质，并在透射双折射介质之后施加到光传输线。 双折射介质的主轴被布置成与来自相位调制器的输出光的偏振方向成45°的角度。

公开(公告)号：US5903375A

公开(公告)日：1999-05-11

申请号：US778249

申请日：1997-01-08

申请人： Yukio Horiuchi ,  Shu Yamamoto

发明人： Yukio Horiuchi ,  Shu Yamamoto

IPC分类号： G01M11/00 ,  G02F1/35 ,  H04B10/035 ,  H04B10/07 ,  H04B10/071 ,  H04B10/077 ,  H04B10/17

CPC分类号： H04B10/07 ,  H04B10/071

摘要： To enable the surveillance of a long-distance optical fiber line that a method using the reflection lights and Rayleigh backscatter lights cannot cover, a plurality of optical reflection elements P1-Pn are interposed in the optical fiber line at each specific distance. Each of the optical reflection elements P1-Pn reflects only a light signal of one of specific wavelengths .lambda.1-.lambda.n on a constant level. Light pulses of the specific wavelengths .lambda.1-.lambda.n are transmitted to the optical fiber line to measure intensities of the light pulses reflected by the optical reflection elements P1-Pn. From the measurement, surveillance of the optical fiber line can be done between the transmitter and each of positions of the optical reflection elements P1-Pn. The reflectance of the optical reflection elements P1-Pn can be set to 100%, and the surveillance becomes possible even if the length of the optical fiber line exceeds 200 km.

摘要翻译： 为了能够对使用反射光和瑞利后向散射光的方法不能覆盖的长距离光纤线路的监视，在光纤线路中以各特定距离插入多个光反射元件P1-Pn。 每个光学反射元件P1-Pn仅反射一个特定波长λ1-λn之一的光信号为恒定电平。 特定波长λ1-λn的光脉冲被发送到光纤线路以测量由光反射元件P1-Pn反射的光脉冲的强度。 通过测量，可以在发送器与光反射元件P1-Pn的各个位置之间进行光纤线路的监视。 光反射元件P1-Pn的反射率可以设定为100％，即使光纤线路的长度超过200km也可以进行监视。

公开(公告)号：US5889607A

公开(公告)日：1999-03-30

申请号：US868976

申请日：1997-06-04

申请人： Masatoshi Suzuki ,  Noboru Edagawa ,  Itsuro Morita ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Masatoshi Suzuki ,  Noboru Edagawa ,  Itsuro Morita ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： G02F1/01 ,  G02F1/015 ,  G02F1/025 ,  H01S5/00 ,  G02F1/03

CPC分类号： G02F1/015 ,  G02F1/0121 ,  G02F2001/0157 ,  G02F2203/06 ,  G02F2203/26

摘要： Incident light 1 is inputted to an electro-absorption-type optical modulator 4 via an optical circulator 2 and a lens 3, and subjected to intensity modulation that corresponds to a modulation signal 8. The optical signal outputted by the electro-absorption-type optical modulator 4 is inputted to a Faraday rotator 6 via a lens 5, and the plane of polarization is rotated 45.degree.. The optical signal transmitted by the Faraday rotator 6 is totally reflected by a totally reflecting mirror 7, inputted for the second time to the Faraday rotator 6, then passed through the lens 5 after the plane of polarization has been rotated 45.degree. by this Faraday rotator 6, and readmitted by the electro-absorption-type optical modulator 4. The output of the electro-absorption-type optical modulator 4 is emitted via the lens 3 and the optical circulator 2. The polarization dependence of insertion loss can be eliminated because the plane of polarization is rotated 90.degree., and the incident light 1 readmitted to the electro-absorption-type optical modulator 4 at any plane of polarization. In view of this, the polarization dependent loss of an electro-absorption-type optical modulator can be eliminated by employing such optical modulators and creating a high-performance optical short pulse generating device, optical waveform shaping device, and optical demultiplexer.

摘要翻译： 入射光1通过光环行器2和透镜3输入到电吸收型光调制器4，经受与调制信号8对应的强度调制。由电吸收型光 调制器4通过透镜5输入到法拉第转子6，偏振面旋转45度。 由法拉第旋转器6传输的光信号被全反射镜7全反射，全反射镜7第二次输入到法拉第旋转器6，然后在该法拉第旋转器旋转了45°的偏振面之后通过透镜5 电吸收型光调制器4再次进入。电吸收型光调制器4的输出通过透镜3和光循环器2发射。插入损耗的偏振依赖性可以被消除，因为 偏振平面旋转90°，入射光1以任何偏振平面返回到电吸收型光调制器4。 鉴于此，可以通过采用这种光学调制器来消除电吸收型光学调制器的偏振相关损耗，并且产生高性能的光学短脉冲产生装置，光学波形整形装置和光学解复用器。

公开(公告)号：US5872647A

公开(公告)日：1999-02-16

申请号：US760411

申请日：1996-12-04

申请人： Hidenori Taga ,  Shu Yamamoto ,  Noboru Edagawa ,  Shigeyuki Akiba

发明人： Hidenori Taga ,  Shu Yamamoto ,  Noboru Edagawa ,  Shigeyuki Akiba

IPC分类号： G02F1/01 ,  H04B10/2569 ,  H04B10/40 ,  H04B10/50 ,  H04B10/516 ,  H04B10/524 ,  H04B10/556 ,  H04B10/60 ,  H04B10/61 ,  H04B10/04

CPC分类号： H04B10/532

摘要： The object of the present invention is to provide an optical transmitter which enables the reduction of the strong dependency of the transmission characteristic on the high-speed polarization scrambler driving signal phase. The light outputted from a light source is converted to a RZ pulse by an electro-absorption modulator. The RZ pulse is modulated by a data modulator, and the polarization thereof is scrambled in a high-speed electro-optic polarization scrambler and outputted from the output terminal thereof. Since, in the present invention, the light is once changed to a RZ pulse, the strong dependency of the optical signal transmission characteristic on the high-speed polarization scrambler driving signal phase can be reduced. Further, if the phase of the RZ pulse in the NRZ modulation signal is made to synchronize with the rising edge or the falling edge of the NRZ signal, the dependency on the high-speed polarization scrambler driving signal phase can be further reduced.

摘要翻译： 本发明的目的是提供一种能够降低传输特性对高速偏振加扰器驱动信号相位的强依赖性的光发射机。 从光源输出的光通过电吸收式调制器转换为RZ脉冲。 RZ脉冲由数据调制器调制，其极化在高速电光偏振扰乱器中被加扰并从其输出端输出。 由于在本发明中，光一度变为RZ脉冲，所以可以降低光信号传输特性对高速偏振加扰器驱动信号相位的强烈依赖性。 此外，如果使NRZ调制信号中的RZ脉冲的相位与NRZ信号的上升沿或下降沿同步，则可以进一步降低对高速偏振加扰器驱动信号相位的依赖性。

公开(公告)号：US5864421A

公开(公告)日：1999-01-26

申请号：US864192

申请日：1997-05-28

申请人： Masatoshi Suzuki ,  Noboru Edagawa ,  Itsuro Morita ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Masatoshi Suzuki ,  Noboru Edagawa ,  Itsuro Morita ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： G02F1/35 ,  G02F1/33 ,  G02F2/02 ,  H04B10/2507 ,  H04B10/2519 ,  H04B10/2525 ,  H04B10/2569 ,  H04B10/29 ,  H04B10/291 ,  H04B10/02

CPC分类号： H04B10/25077 ,  G02F1/33

摘要： An optical frequency shifter which has no insertion loss polarization dependency and no polarization mode dispersion is formed by: at least one ultrasonic wave generator for generating ultrasonic waves; at least one electric acousto-optic element forming at least one diffraction grating therein upon being applied with the ultrasonic waves generated by the ultrasonic wave generator; at least one polarization rotator for rotating a polarization plane of a first primary diffracted light produced by the diffraction grating, by 90.degree.; and a light path through which an input light is entered into the electric acousto-optic element at a Bragg angle of the diffraction grating in a prescribed direction side, the prescribed direction being defined as either identical or opposite to a propagation direction of the ultrasonic waves, so that the first primary diffracted light is produced by the diffraction grating from the input light, a polarization plane rotated light produced by the polarization rotator is entered into the electric acousto-optic element at a Bragg angle of the diffraction grating in the prescribed direction side, and a second primary diffracted light produced by the diffraction grating from the polarization plane rotated light is outputted as an output light. An optical soliton-like return-to-zero pulse transmission system using a combination of this optical frequency shifter and a fixed optical filter in an optical amplifier repeater is also disclosed.

摘要翻译： 通过以下方法形成没有插入损耗极化依赖性和无偏振模色散的光学移频器：至少一个用于产生超声波的超声波发生器; 至少一个电声光学元件在被施加超声波发生器产生的超声波时形成至少一个衍射光栅; 至少一个偏振旋转器，用于将由衍射光栅产生的第一主衍射光的偏振面旋转90度; 以及在规定的方向侧以衍射光栅的布拉格角将输入光输入到电声元件中的光路，规定的方向被定义为与超声波的传播方向相同或相反 ，使得第一主衍射光由衍射光栅从输入光产生，由偏振旋转器产生的偏振面旋转的光以预定方向的衍射光栅的布拉格角进入电声元件 输出由衍射光栅从偏振面旋转的光产生的第二主衍射光作为输出光。 还公开了在光放大器中继器中使用该光移频器和固定滤光器的组合的光孤子状归零脉冲传输系统。