公开(公告)号：US07817923B2

公开(公告)日：2010-10-19

申请号：US11275420

申请日：2005-12-30

申请人： Yuichi Akiyama ,  Takeshi Hoshida ,  Yutaka Kai ,  Hiroki Ooi ,  Kentaro Nakamura ,  Naoki Kuwata ,  Yoshinori Nishizawa ,  Tomoo Takahara ,  Masahiro Yuki

发明人： Yuichi Akiyama ,  Takeshi Hoshida ,  Yutaka Kai ,  Hiroki Ooi ,  Kentaro Nakamura ,  Naoki Kuwata ,  Yoshinori Nishizawa ,  Tomoo Takahara ,  Masahiro Yuki

IPC分类号： H04B10/04

CPC分类号： G02F1/2255 ,  G02F1/0123 ,  H04B10/505 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/50575 ,  H04B10/50577 ,  H04B10/50595 ,  H04B10/5162 ,  H04B10/5165 ,  H04B10/5561 ,  H04B10/66 ,  H04B10/677

摘要： A phase shift unit provides a prescribed phase difference (π/2, for example) between a pair of optical signals transmitted via a pair of arms constituting a data modulation unit. A low-frequency signal f0 is superimposed on one of the optical signals. A signal of which phase is shifted by π/2 from the low-frequency signal f0 is superimposed on the other optical signal. A pair of the optical signals is coupled, and a part of which is converted into an electrical signal by a photodiode. 2f0 component contained in the electrical signal is extracted. Bias voltage provided to the phase shift unit is controlled by feedback control so that the 2f0 component becomes the minimum.

摘要翻译： 相移单元在经由构成数据调制单元的一对臂发送的一对光信号之间提供规定的相位差（＆pgr / / 2）。 低频信号f0叠加在一个光信号上。 将相位从低频信号f0移位了＆pgr / / 2的信号叠加在另一个光信号上。 一对光信号被耦合，其一部分由光电二极管转换成电信号。 提取包含在电信号中的2f0分量。 通过反馈控制来控制提供给相移单元的偏压，使得2f0分量成为最小值。

公开(公告)号：US07761007B2

公开(公告)日：2010-07-20

申请号：US11313960

申请日：2005-12-22

申请人： Hideyuki Miyata ,  Goji Nakagawa ,  Yutaka Kai

发明人： Hideyuki Miyata ,  Goji Nakagawa ,  Yutaka Kai

IPC分类号： H04B10/20 ,  H04J14/02

摘要： An optical network system is disclosed by which flexible wavelength path setting can be performed in accordance with tree-shaped and star-shaped network topology. A central node includes a multiplexing section for multiplexing optical signals transmitted from user nodes and inputted thereto, and a central node side branching section for branching the optical signal multiplexed by the multiplexing section and supplying the branched optical signals to the user nodes. Each of the user nodes includes a transmission section capable of outputting an optical signal to which transmission wavelengths different from those of the other user nodes are set, and a reception section for extracting selected optical wavelength components from the branched light supplied thereto from the central node side branching section and extracting optical signals from the extracted optical wavelength components.

公开(公告)号：US07433601B2

公开(公告)日：2008-10-07

申请号：US11038515

申请日：2005-01-21

申请人： Yutaka Kai

发明人： Yutaka Kai

IPC分类号： H04J14/02 ,  H04J14/00

CPC分类号： H04J14/0283 ,  H04J14/0204 ,  H04J14/0206 ,  H04J14/0209 ,  H04J14/021 ,  H04J14/0213 ,  H04J14/0227 ,  H04J14/0238 ,  H04J14/028 ,  H04J14/0284

摘要： Provided are a plurality of fixed wavelength drop filters 35 demultiplexing optical signals having a plurality of different fixed wavelengths, a plurality of fixed wavelength add filters 36 provided corresponding respectively to the fixed wavelength drop filters 35 and adding the optical signals having the fixed wavelengths wavelength division multiplexed light flowing along a transmission path 1, a first optical branching unit 31 branching part of the wavelength division multiplexed light flowing along the transmission path 1, and a variable wavelength drop filter 32 demultiplexing the optical signal having the wavelength corresponding to a specified value from the wavelength division multiplexed light branched by the first optical branching unit 31.

摘要翻译： 提供了多个固定波长分离滤波器35，其对具有多个不同固定波长的光信号进行解复用，多个固定波长加法滤波器36分别对应于固定波长下降滤波器35，并将具有固定波长波长的光信号 沿着传输路径1流动的多路复用光，沿着传输路径1流动的波分复用光的一部分的第一光分路单元31和将具有对应于指定值的波长的光信号解复用的可变波长丢失滤波器32， 由第一光分支单元31分支的波分复用光。

公开(公告)号：US20080068051A1

公开(公告)日：2008-03-20

申请号：US11727632

申请日：2007-03-27

申请人： Masaji Noguchi ,  Tomohiro Ueno ,  Yutaka Kai ,  Setsuo Yoshida

发明人： Masaji Noguchi ,  Tomohiro Ueno ,  Yutaka Kai ,  Setsuo Yoshida

IPC分类号： H03K3/00

CPC分类号： H04Q11/0005 ,  H03K19/00346 ,  H04Q2011/0013 ,  H04Q2011/0039

摘要： A driving circuit of a semiconductor optical amplifier type gate switch constituting a matrix optical switch is provided with an operation amplifier into which a driving signal is input and from which a current corresponding to the driving signal is output, an inductance element provided at an output terminal of the operation amplifier, and a circuit composed of a diode element and a resistor element connected in parallel and provided between the inductance element and the semiconductor optical amplifier.

摘要翻译： 构成矩阵光开关的半导体光放大型门极开关的驱动电路设置有输入驱动信号的运算放大器，输出与驱动信号对应的电流，设置在输出端子的电感元件 以及由并联连接并设置在电感元件和半导体光放大器之间的二极管元件和电阻元件构成的电路。

公开(公告)号：US07187814B2

公开(公告)日：2007-03-06

申请号：US10960023

申请日：2004-10-08

申请人： Masaji Noguchi ,  Toshihisa Kyouno ,  Hideyuki Miyata ,  Yutaka Kai

发明人： Masaji Noguchi ,  Toshihisa Kyouno ,  Hideyuki Miyata ,  Yutaka Kai

IPC分类号： G02F1/335 ,  G02B6/42 ,  G02B6/26

CPC分类号： G02F1/125 ,  G02F1/116 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/021

摘要： A drop-type AOTF is used as a configuration for removing from a through signal an optical signal having the same wavelength as that of an optical signal to be added. To the drop-type AOTF, RF signals are input to always select all of wavelengths, and an RF signal is not input for a wavelength desired to be rejected. As a result, the optical signal having the wavelength for which the RF signal is stopped is not selected by the drop-type AOTF, and cannot pass through. Since there is only one RF signal whose input is stopped, a “drawing effect” does not occur, and control of an optical add/drop device is simplified. Additionally, since high-speed switching can be made, and a wavelength to be added can be varied, restrictions are not imposed on a network configuration.

摘要翻译： 使用液滴型AOTF作为从通过信号去除与要添加的光信号的波长相同的波长的光信号的配置。 对于放大型AOTF，输入RF信号以始终选择所有波长，并且不输入要被拒绝的波长的RF信号。 结果，具有停止RF信号的波长的光信号不被滴型AOTF选择，不能通过。 由于只有一个RF信号的输入停止，所以不会产生“绘图效果”，简化了光学分插装置的控制。 此外，由于可以进行高速切换，并且可以改变要添加的波长，所以不对网络配置施加限制。

公开(公告)号：US06947630B2

公开(公告)日：2005-09-20

申请号：US10284299

申请日：2002-10-31

申请人： Yutaka Kai ,  Hideyuki Miyata ,  Isao Tsuyama

发明人： Yutaka Kai ,  Hideyuki Miyata ,  Isao Tsuyama

IPC分类号： G02B5/18 ,  G02B6/12 ,  G02B6/34 ,  G02F1/01 ,  H04B10/07 ,  H04B10/27 ,  H04B10/29 ,  H04B10/291 ,  H04J14/02 ,  G02B6/28

CPC分类号： G02B6/29395 ,  G02B6/12007 ,  G02F1/0121 ,  G02F2203/585 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/021 ,  H04J14/0213

摘要： The present invention has an object to provide a control method and a control apparatus for a variable wavelength optical filter, which can reliably and stably control drive conditions of the variable wavelength optical filter, independent of the number of wavelengths to be selectively separated in collective. To this end, the control apparatus for a variable wavelength optical filter according to the present invention comprises: a light reception section that takes out to receive, in collective, monitor light corresponding to each optical signal selectively separated by the variable wavelength optical filter, and creates a monitor signal a level of which is changed corresponding to the power of the received monitor light; an alternating current component extraction section that extracts an alternating current component of the monitor signal generated by the light reception section; and a tracking control section that controls the drive condition of the variable wavelength optical filter based on a level change in the alternating current component extracted by the alternating current component extraction section.

摘要翻译： 本发明的目的是提供一种用于可变波长滤光器的控制方法和控制装置，其可以可靠且稳定地控制可变波长光学滤波器的驱动条件，而与集体中选择性分离的波长数无关。 为此，根据本发明的可变波长光学滤波器的控制装置包括：光接收部分，其集中地监视与由可变波长滤光器选择性分离的每个光信号相对应的光，以及 创建一个监视信号，其电平根据所接收的监视光的功率而改变; 交流分量提取部，其提取由所述受光部生成的所述监视信号的交流分量; 以及跟踪控制部分，其基于由交流分量提取部分提取的交流分量的电平变化来控制可变波长光学滤波器的驱动条件。

公开(公告)号：US08937762B2

公开(公告)日：2015-01-20

申请号：US13450577

申请日：2012-04-19

申请人： Yutaka Kai ,  Setsuo Yoshida ,  Taku Yoshida ,  Keisuke Harada

发明人： Yutaka Kai ,  Setsuo Yoshida ,  Taku Yoshida ,  Keisuke Harada

IPC分类号： H01S3/102

CPC分类号： H04B10/2942 ,  H04J14/0221

摘要： A level control circuit that generates output signal for level control includes: a control information storage that stores control information corresponding to a signal level, a control information circuit that outputs the output signal for level control corresponding to the signal level of a first input signal based on the control information stored in the control information storage; and an information update circuit that updates the control information of the control information storage according to the signal level of a second input signal.

摘要翻译： 产生电平控制的输出信号的电平控制电路包括：存储对应于信号电平的控制信息的控制信息存储器，输出与第一输入信号的信号电平对应的电平控制的输出信号的控制信息电路， 关于存储在控制信息存储器中的控制信息; 以及信息更新电路，其根据第二输入信号的信号电平更新控制信息存储器的控制信息。

公开(公告)号：US08787757B2

公开(公告)日：2014-07-22

申请号：US12946844

申请日：2010-11-15

申请人： Yutaka Kai

发明人： Yutaka Kai

IPC分类号： H04B10/20 ,  H04B10/17 ,  H04B10/00 ,  G02B6/28

CPC分类号： H04B10/0773 ,  H04Q11/0067 ,  H04Q2011/0069 ,  H04Q2011/0079 ,  H04Q2011/0081

摘要： An optical communication network includes a plurality of optical transmission devices, a communication path, an optical repeater, and a supervisory controller that includes a supervisory control information sender which is installed on at least one of one of the optical transmission devices and the optical repeater and controls a drive signal supplied to a semiconductor optical amplifier that amplifies and outputs input signal light onto the communication path on the basis of the supervisory control information, and a supervisory control information receiver that receives the light which has been output from a semiconductor optical amplifier and transmitted through the communication path, converts the received light to an electric signal and identifies the supervisory control information on the basis of an intensity-modulated component of the total power of the electric signal in at least the other of one of the optical transmission devices and the optical repeater.

摘要翻译： 光通信网络包括多个光传输设备，通信路径，光中继器和监控控制器，其包括安装在光传输设备和光中继器中的至少一个上的监控信息发送器，以及 控制提供给半导体光放大器的驱动信号，其基于监控信息放大并输出到通信路径上的输入信号光;以及监控信息接收器，其接收从半导体光放大器输出的光，以及 通过通信路径发送，将接收到的光转换为电信号，并且基于光传输装置中的至少另一个中的电信号的总功率的强度调制分量来识别监控信息，以及 光中继器。

公开(公告)号：US08463135B2

公开(公告)日：2013-06-11

申请号：US12754178

申请日：2010-04-05

申请人： Kyosuke Sone ,  Yutaka Kai ,  George Ishikawa ,  Susumu Kinoshita

发明人： Kyosuke Sone ,  Yutaka Kai ,  George Ishikawa ,  Susumu Kinoshita

IPC分类号： H04B10/00

CPC分类号： H04B10/2971 ,  H04B10/2914 ,  H04Q11/0067 ,  H04Q2011/0079 ,  H04Q2011/0086

摘要： A relay apparatus including: a first interface 11 that branches an optical signal that is input in a first direction from one side of the optical transmission line, and directs the optical signal to a first path and a second path, the first path being a processing path of an optical signal having a first transmission speed, the second path being a processing path of an optical signal having a second transmission speed that is different from the first transmission speed; a processing section 12 that executes processing on an optical signal propagating through each of the paths in accordance with a corresponding transmission speed; and a second interface 13 that binds the first path and the second path of the optical signal on which the processing is executed by the processing section, by means of wavelength multiplexing and directs to the other end of the optical transmission line.

摘要翻译： 一种中继装置，包括：第一接口11，其分支从光传输线的一侧沿第一方向输入的光信号，并将光信号引导到第一路径和第二路径，第一路径是处理 具有第一传输速度的光信号的路径，第二路径是具有与第一传输速度不同的第二传输速度的光信号的处理路径; 处理部分12，根据相应的传输速度对通过每条路径传播的光信号执行处理; 以及第二接口13，其通过波长复用来绑定由处理部分执行处理的光信号的第一路径和第二路径，并引导到光传输线的另一端。

公开(公告)号：US20120257272A1

公开(公告)日：2012-10-11

申请号：US13417481

申请日：2012-03-12

申请人： Setsuo YOSHIDA ,  Susumu Kinoshita ,  George Ishikawa ,  Goji Nakagawa ,  Yutaka Kai ,  Kyosuke Sone ,  Keisuke Harada

发明人： Setsuo YOSHIDA ,  Susumu Kinoshita ,  George Ishikawa ,  Goji Nakagawa ,  Yutaka Kai ,  Kyosuke Sone ,  Keisuke Harada

IPC分类号： H01S5/06

CPC分类号： H04B10/2914 ,  H01S5/0078 ,  H01S5/0428 ,  H01S5/06216 ,  H01S5/06835 ,  H01S5/4087 ,  H01S5/5027 ,  H01S2301/04 ,  H01S2301/06

摘要： An optical amplification apparatus includes a front-stage semiconductor optical amplifier which amplifies an input light and a rear-stage semiconductor optical amplifier which amplifies an amplified light outputted from the front-stage semiconductor optical amplifier. The front-stage semiconductor optical amplifier exercises auto level control of an output light by exercising variable control of driving current which flows according to applied voltage higher than light emitting threshold voltage of an internal optical amplification element. The rear-stage semiconductor optical amplifier performs gate switching of a transmitted light by exercising switching control of driving current. By doing so, distortion of a waveform is controlled and optical communication quality can be improved.

摘要翻译： 光放大装置包括放大输入光的前级半导体光放大器和放大从前级半导体光放大器输出的放大光的后级半导体光放大器。 前级半导体光放大器通过对根据施加的电压高于内部光放大元件的发光阈值电压的驱动电流的可变控制来进行输出光的自动电平控制。 后级半导体光放大器通过进行驱动电流的切换控制来进行透射光的栅极切换。 通过这样做，可以控制波形失真，提高光通信质量。