公开(公告)号：US20090047028A1

公开(公告)日：2009-02-19

申请号：US12234931

申请日：2008-09-22

申请人： Takafumi TERAHARA ,  Takeshi Hoshida ,  Kentaro Nakamura ,  Yuichi Akiyama ,  Hiroki Ooi ,  Jens C. Rasmussen ,  Akira Miura

发明人： Takafumi TERAHARA ,  Takeshi Hoshida ,  Kentaro Nakamura ,  Yuichi Akiyama ,  Hiroki Ooi ,  Jens C. Rasmussen ,  Akira Miura

IPC分类号： H04B10/04

CPC分类号： H04B10/5053 ,  G02F1/0121 ,  G02F2001/212 ,  G02F2201/58 ,  G02F2203/21 ,  H04B10/505 ,  H04B10/50577 ,  H04B10/5561

摘要： The improved quadrature phase shift keying modulator has a structure such that the average light output power of phase-shift keying modulation light output from the combining unit is changed according to the phase difference between the first and the second optical signal after being combined by means of applying driving signals different in eye crossing percentage by the first modulator and the second modulator, respectively, and has a power monitor monitoring the average light output power of quadrature phase-shift keying modulated light and a phase shift controlling unit which performs feedback control of the phase shift amount in the phase shifting unit based on the average light output power monitored by the power monitor.

摘要翻译： 改进的正交相移键控调制器具有这样的结构，使得从组合单元输出的相移键控调制光的平均光输出功率根据第一和第二光信号之间的相位差在通过 通过第一调制器和第二调制器分别施加与眼睛交叉百分比不同的驱动信号，并且具有监视正交相移键控调制光的平均光输出功率的功率监视器和执行正交相移键控调制光的相位偏移控制单元的反相控制 基于由功率监视器监视的平均光输出功率，移相单元中的相移量。

公开(公告)号：US20080138068A1

公开(公告)日：2008-06-12

申请号：US11984534

申请日：2007-11-19

申请人： Yuichi Akiyama ,  Takafumi Terahara ,  Hiroki Ooi

发明人： Yuichi Akiyama ,  Takafumi Terahara ,  Hiroki Ooi

IPC分类号： H04J14/00

CPC分类号： H04Q11/0005 ,  G02B6/3512 ,  G02B6/3542 ,  G02B6/356 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0217 ,  H04Q2011/0015 ,  H04Q2011/0016 ,  H04Q2011/003 ,  H04Q2011/0052

摘要： An optimally-sized optical cross-connect that switches optical signal paths with a minimum number of wavelength selective switches and their interconnections. To switch optical signals of N routes (N=1, 2, . . . ), an optical cross-connect includes a 2×N (2-input, N-output) wavelength selective switch for each of N input routes and a N×2 (N-input, 2-output) wavelength selective switch for each of N output routes. One input port of each 2×N wavelength selective switch receives an optical signal from a corresponding input route, while the other input port of the same receives an optical add signal from a corresponding add route. One output port of each N×2 wavelength selective switch outputs an optical signal to a corresponding output route, while the other output port outputs an optical drop signal to a corresponding drop route.

摘要翻译： 最小尺寸的光交叉连接，可以用最少数量的波长选择开关及其互连来切换光信号路径。 为了切换N个路由（N = 1,2，...）的光信号，光交叉连接包括用于N个输入路由中的每一个的2xN（2输入，N输出）波长选择性开关，并且Nx2（N 输入，2输出）波长选择开关。 每个2xN波长选择开关的一个输入端口从相应的输入路径接收光信号，而其它输入端口从相应的添加路由接收光添加信号。 每个Nx2波长选择开关的一个输出端口将光信号输出到相应的输出路径，而另一个输出端口将光信号输出到相应的丢弃路由。

公开(公告)号：US07006770B2

公开(公告)日：2006-02-28

申请号：US09790695

申请日：2001-02-23

申请人： Yuichi Akiyama ,  Hiroki Ooi ,  George Ishikawa

发明人： Yuichi Akiyama ,  Hiroki Ooi ,  George Ishikawa

IPC分类号： H04B10/18

CPC分类号： H04B10/25133 ,  H04B10/25137 ,  H04B10/66 ,  H04B2210/252

摘要： The invention relates to an optical receiving station, an optical communication system, and a dispersion controlling method for precisely controlling chromatic dispersion in an optical transmission line or chromatic dispersion in an optical transmission line that varies with time. An optical receiving station is provided with a dispersion compensating section for receiving, via an optical transmission line, an optical signal modulated according to an optical duo-binary modulation method and for changing a dispersion value to be used for compensating for chromatic dispersion in an optical transmission line, an intensity detecting section for detecting the intensity of a specific frequency component of the optical signal output from the dispersion compensating section, and a controlling section for adjusting the dispersion value of the dispersion compensating section so that the output of the intensity detecting section has a predetermined extreme value.

公开(公告)号：US5973816A

公开(公告)日：1999-10-26

申请号：US45121

申请日：1998-03-20

申请人： Yuichi Akiyama ,  George Ishikawa ,  Hiroki Ooi ,  Shigeki Watanabe

发明人： Yuichi Akiyama ,  George Ishikawa ,  Hiroki Ooi ,  Shigeki Watanabe

IPC分类号： G02F1/015 ,  G01M11/02 ,  G02F1/01 ,  G02F1/025 ,  G02F1/03 ,  G02F1/035 ,  H04B10/07 ,  H04B10/2507 ,  H04B10/2525 ,  H04B10/508 ,  H04B10/516 ,  H04B10/524 ,  H04B10/556 ,  H04B10/564 ,  H04B10/572 ,  H04B10/588 ,  H04B10/61 ,  G02B26/00

CPC分类号： H04B10/2525 ,  G02F1/0327 ,  H04B10/25137 ,  G02F2001/212 ,  G02F2203/25 ,  G02F2203/26 ,  H04B2210/252 ,  H04B2210/254

摘要： An apparatus includes a driving voltage generator that generates a pulse driving voltage having a rising edge and a decaying edge. An optical modulator produces a first pulse at the rising edge of the pulse driving voltage and a second pulse at the decaying edge of the pulse driving voltage. Therefore, the first and second pulses are both produced from a single driving pulse voltage. The frequency of the first pulse is determined by the slope of the rising edge of the pulse driving voltage and the frequency of the second pulse is determined by the slope of the decaying edge of the pulse driving voltage. The first and second pulses are transmitted through a transmission line. A detection device detects the first and second pulses after being transmitted through the transmission line. A processor then determines the amount of dispersion in the transmission line by comparing the time interval between the detected first and second pulses to the time interval of the first and second pulses before being transmitted. Generally, the optical modulator is a Mach-Zehnder modulator driven with a pulse driving voltage exceeding the half-wavelength voltage of the modulator.

摘要翻译： 一种装置包括产生具有上升沿和衰减沿的脉冲驱动电压的驱动电压发生器。 光调制器在脉冲驱动电压的上升沿产生第一脉冲，在脉冲驱动电压的衰减沿产生第二脉冲。 因此，第一和第二脉冲都是从单个驱动脉冲电压产生的。 第一脉冲的频率由脉冲驱动电压的上升沿的斜率决定，第二脉冲的频率由脉冲驱动电压的衰减沿的斜率决定。 第一和第二脉冲通过传输线传输。 检测装置在通过传输线传输之后检测第一和第二脉冲。 然后处理器通过将检测到的第一和第二脉冲之间的时间间隔与发送之前的第一和第二脉冲的时间间隔进行比较来确定传输线中的色散量。 通常，光调制器是脉冲驱动电压超过调制器的半波长电压驱动的马赫 - 曾德调制器。

公开(公告)号：US08457503B2

公开(公告)日：2013-06-04

申请号：US13069611

申请日：2011-03-23

申请人： Yuichi Akiyama

发明人： Yuichi Akiyama

IPC分类号： H04B10/04 ,  H04B10/50 ,  H04B10/556

CPC分类号： H04B10/50572 ,  G02F1/2255 ,  H04B10/505 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/50575 ,  H04B10/50577 ,  H04B10/5162 ,  H04B10/5561

摘要： An optical DQPSK modulator comprises a pair of phase modulators. Each of the pair of the phase modulators is provided with first and second driving signals. The first and second driving signals are amplified by first and second amplifiers, respectively. An RZ intensity modulator generates an optical RZ-DQPSK signal from an optical DQPSK signal output from the optical DQPSK modulator. A photodetector generates a monitor signal from the optical RZ-DQPSK signal. A gain adjuster unit adjusts the gains of the first and second amplifiers so as to minimize the power of the monitor signal.

摘要翻译： 光DQPSK调制器包括一对相位调制器。 一对相位调制器中的每一个具有第一和第二驱动信号。 第一和第二驱动信号分别由第一和第二放大器放大。 RZ强度调制器从光DQPSK调制器输出的光DQPSK信号产生光RZ-DQPSK信号。 光电检测器从光学RZ-DQPSK信号产生监视信号。 增益调节单元调节第一和第二放大器的增益，以便最小化监视信号的功率。

公开(公告)号：US08145071B2

公开(公告)日：2012-03-27

申请号：US12230247

申请日：2008-08-26

申请人： Toshiki Tanaka ,  Yuichi Akiyama ,  Tomoo Takahara

发明人： Toshiki Tanaka ,  Yuichi Akiyama ,  Tomoo Takahara

IPC分类号： H04B10/06 ,  H04B10/18

CPC分类号： H04B10/6971 ,  H04B10/677

摘要： An optical receiving apparatus branches an optical signal, photo-electric-converts the branched signals, and compensates dispersion in each of the converted electrical signals. Electrical-dispersion compensators respectively compensate the dispersion in the electrical signals using a transversal filter having plural taps. A dispersion control unit controls the dispersion compensation amount for each of the electrical signals by adjusting tap coefficients of the transversal filter. A delay control unit controls the difference in the delay time of the electrical signals by adjusting the tap coefficients adjusted by the dispersion control unit. An identifying circuit identifies data in the optical signal based on each of the electrical signals that have been subjected to dispersion compensation by each of the electrical-dispersion compensators.

摘要翻译： 光接收装置分支光信号，对分支信号进行光电转换，并补偿每个转换的电信号中的色散。 电色散补偿器使用具有多个抽头的横向滤波器分别补偿电信号中的色散。 色散控制单元通过调整横向滤波器的抽头系数来控制每个电信号的色散补偿量。 延迟控制单元通过调整由色散控制单元调节的抽头系数来控制电信号的延迟时间的差异。 识别电路基于通过每个电色散补偿器进行色散补偿的每个电信号来识别光信号中的数据。

公开(公告)号：US08131152B2

公开(公告)日：2012-03-06

申请号：US12910497

申请日：2010-10-22

申请人： Yuichi Akiyama ,  Takafumi Terahara ,  Hiroki Ooi ,  Jens C. Rasmussen ,  Akira Miura ,  Akihiko Isomura

发明人： Yuichi Akiyama ,  Takafumi Terahara ,  Hiroki Ooi ,  Jens C. Rasmussen ,  Akira Miura ,  Akihiko Isomura

IPC分类号： H04B10/00

CPC分类号： H04Q11/0005 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0206 ,  H04J14/0208 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0217 ,  H04J14/0219 ,  H04J14/022 ,  H04J14/0221 ,  H04Q2011/0009 ,  H04Q2011/0016 ,  H04Q2011/0032 ,  H04Q2011/0039 ,  H04Q2011/0075 ,  H04Q2011/0083

摘要： An optical add/drop multiplexer includes a first optical coupler receiving an optical signal including a plurality of multiplexed wavelengths, a wavelength blocker receiving the optical signal from the first optical coupler, and blocking at least one wavelength of the plurality of multiplexed wavelengths, a first wavelength selective switch, having one input port receiving the outputted optical signal from the first optical coupler and a plurality of output ports, demultiplexing a plurality of arbitrarily selected multiplexed wavelengths from the received optical signal, a second wavelength selective switch, having a plurality of input ports, each input port receiving a different optical signal and one output port, multiplexing a plurality of arbitrarily selected wavelength signals on the plurality of input ports, and a second optical coupler receiving the optical signal output from the wavelength blocker and multiplexed wavelength signal from the second wavelength selective switch.

摘要翻译： 光分插复用器包括接收包括多个复用波长的光信号的第一光耦合器，接收来自第一光耦合器的光信号的波长阻挡器，以及阻挡多个复用波长的至少一个波长;第一 波长选择开关，具有从所述第一光耦合器接收输出的光信号的一个输入端口和多个输出端口，从所接收的光信号中解复用多个任意选择的复用波长;第二波长选择开关，具有多个输入 端口，每个输入端口接收不同的光信号和一个输出端口，在多个输入端口上复用多个任意选择的波长信号，以及接收从波长阻挡器输出的光信号的第二光耦合器和来自 第二波长选择开关。

公开(公告)号：US07907324B2

公开(公告)日：2011-03-15

申请号：US12292471

申请日：2008-11-19

申请人： Takeshi Hoshida ,  Yuichi Akiyama

发明人： Takeshi Hoshida ,  Yuichi Akiyama

IPC分类号： G02F1/01 ,  G02B26/00

CPC分类号： G02F1/0123 ,  G02F1/2255 ,  H04B10/5053 ,  H04B10/50575 ,  H04B10/541

摘要： The optical modulator branches an input light into (2×N) lights in an optical branching section, and then phase modulates each of the branched lights in (2×N) phase modulating sections, and couples the phase modulated lights in an optical coupling section and generates a quadrature amplitude modulated (QAM) signal light having a 4N value. At this time, a relative difference of optical phases of the phase modulated lights is variably adjusted by an optical phase adjusting section. Moreover, a power ratio of the phase modulated lights is variably adjusted with an optical power adjusting section. As a result, it is possible to output 4N QAM signal light, with good signal quality.

摘要翻译： 光调制器将输入光分支到（2×N）个光分支部分中，然后对（2×N）个相位调制部分中的每个分支光进行相位调制，并将相位调制光耦合到光耦合部分 并产生具有4N值的正交幅度调制（QAM）信号光。 此时，通过光学相位调整部可变地调整相位调制光的相位差。 此外，利用光功率调节部可变地调节相位调制光的功率比。 因此，可以输出4N QAM信号光，信号质量好。

公开(公告)号：US07853148B2

公开(公告)日：2010-12-14

申请号：US12371278

申请日：2009-02-13

申请人： Yuichi Akiyama ,  Takafumi Terahara ,  Hiroki Ooi ,  Jens C. Rasmussen ,  Akira Miura ,  Akihiko Isomura

发明人： Yuichi Akiyama ,  Takafumi Terahara ,  Hiroki Ooi ,  Jens C. Rasmussen ,  Akira Miura ,  Akihiko Isomura

IPC分类号： H04B10/00

CPC分类号： H04Q11/0005 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0206 ,  H04J14/0208 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0217 ,  H04J14/0219 ,  H04J14/022 ,  H04J14/0221 ,  H04Q2011/0009 ,  H04Q2011/0016 ,  H04Q2011/0032 ,  H04Q2011/0039 ,  H04Q2011/0075 ,  H04Q2011/0083

摘要： An optical add/drop multiplexer includes a first optical coupler receiving an optical signal including a plurality of multiplexed wavelengths, a wavelength blocker receiving the optical signal from the first optical coupler, and blocking at least one wavelength of the plurality of multiplexed wavelengths, a first wavelength selective switch, having one input port receiving the outputted optical signal from the first optical coupler and a plurality of output ports, demultiplexing a plurality of arbitrarily selected multiplexed wavelengths from the received optical signal, a second wavelength selective switch, having a plurality of input ports, each input port receiving a different optical signal and one output port, multiplexing a plurality of arbitrarily selected wavelength signals on the plurality of input ports, and a second optical coupler receiving the optical signal output from the wavelength blocker and multiplexed wavelength signal from the second wavelength selective switch.

摘要翻译： 光分插复用器包括接收包括多个复用波长的光信号的第一光耦合器，接收来自第一光耦合器的光信号的波长阻挡器，以及阻挡多个复用波长的至少一个波长;第一 波长选择开关，具有从所述第一光耦合器接收输出的光信号的一个输入端口和多个输出端口，从所接收的光信号中解复用多个任意选择的复用波长;第二波长选择开关，具有多个输入 端口，每个输入端口接收不同的光信号和一个输出端口，在多个输入端口上复用多个任意选择的波长信号，以及接收从波长阻挡器输出的光信号的第二光耦合器和来自 第二波长选择开关。

公开(公告)号：US20100254716A1

公开(公告)日：2010-10-07

申请号：US12662586

申请日：2010-04-23

申请人： Yuichi Akiyama ,  Hiroki Ooi

发明人： Yuichi Akiyama ,  Hiroki Ooi

IPC分类号： H04B10/04

CPC分类号： H04B10/50597 ,  G02F1/0121 ,  G02F1/0123 ,  G02F1/225 ,  G02F2201/16 ,  H04B10/5051 ,  H04B10/50575 ,  H04B10/50577 ,  H04B10/5162 ,  H04B10/58

摘要： An object of the invention is to provide a control system in which the phase shift between drive signals of an optical modulator can be reliably detected and compensated by a simple configuration. To this end, a control apparatus of the invention, for an optical modulator generating a signal light of a CS-RZ modulation system or the like by two LN modulators connected in series, detects the phase shift between drive signals given to the former and latter stage LN modulators, or judges the phase shift between the drive signals based on intensity information of the electric spectrum of the signal light output from the optical modulator, to control the phases of the drive signals so as to minimize the phase shift. As a result, the phase shift between the drive signals can be reliably detected and compensated by an electric circuit with a simple configuration.

摘要翻译： 本发明的目的是提供一种控制系统，其中可以通过简单的配置可靠地检测和补偿光调制器的驱动信号之间的相移。 为此，本发明的控制装置，用于通过串联连接的两个LN调制器产生CS-RZ调制系统等的信号光的光调制器，检测给予前者和后一个的驱动信号之间的相移 或者基于从光调制器输出的信号光的电谱的强度信息来判断驱动信号之间的相移，以控制驱动信号的相位，以使相移最小化。 结果，可以通过具有简单结构的电路可靠地检测和补偿驱动信号之间的相移。