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1. 发明授权

US09014572B2 Optical transmitter, control method for the same, and optical transmission system 有权
标题翻译：光发射机，相同的控制方法和光传输系统
公开(公告)号：US09014572B2
公开(公告)日：2015-04-21
申请号：US13436780
申请日：2012-03-30
申请人： Yuichi Akiyama
发明人： Yuichi Akiyama
IPC分类号： H04B10/12 , H04B10/50 , H04B10/00
CPC分类号： H04B10/5053 , H04B10/50575
摘要： An optical transmitter includes an optical modulator having first and second waveguides to modulate carrier light at each of the waveguides using a driving signal with 2*n intensity levels (n is an integer 1 or greater); and a phase shifter to cause a phase difference between a first optical signal and a second optical signal output from the first waveguide and the second waveguide, respectively. A photodetector converts a portion of a multilevel optical modulation signal acquired by combining the first optical signal and the second optical signals into an electrical signal. A monitor detects a change in an alternating current component in the detected modulation signal. A controller controls at least one of a first bias voltage and a second bias voltage being supplied to the first waveguide and the second waveguide, respectively, so as to increase the power value of the alternating current component.
摘要翻译：光发射机包括光调制器，其具有第一和第二波导，以使用具有2 * n个强度级（n为1或更大的整数）的驱动信号来调制每个波导处的载波。以及分别在第一光信号和从第一波导和第二波导输出的第二光信号之间产生相位差的移相器。光电检测器将通过将第一光信号和第二光信号组合而获得的多电平光调制信号的一部分转换为电信号。监视器检测检测到的调制信号中的交流分量的变化。控制器分别控制第一偏置电压和第二偏置电压中的至少一个被提供给第一波导和第二波导，以增加交流分量的功率值。

2. 发明授权

US08565616B2 Polarized-wave-multiplexing optical transmitter and control method of polarized-wave-multiplexed optical signal 有权
标题翻译：偏振波复用光信号的偏振波复用光信号的控制方法
公开(公告)号：US08565616B2
公开(公告)日：2013-10-22
申请号：US13028677
申请日：2011-02-16
申请人： Toshiki Tanaka , Yuichi Akiyama , Masato Nishihara
发明人： Toshiki Tanaka , Yuichi Akiyama , Masato Nishihara
IPC分类号： H04B10/04
CPC分类号： H04B10/50575 , H04B10/564 , H04J14/06
摘要： A polarized-wave-multiplexing optical transmitter including: an optical combiner generating a polarized-wave-multiplexed optical signal by polarized-wave-multiplexing a first optical modulation signal and a second optical modulation signal; an optical power fluctuation portion fluctuating optical power of the first optical modulation signal and the second optical modulation signal periodically; a total-optical-power detection portion detecting fluctuation amount of total optical power of the polarized-wave-multiplexed optical signal; and an optical power controller reducing an optical power difference between the first optical modulation signal and the second optical modulation signal based on detection result of the total-optical-power detection portion.
摘要翻译：一种偏振波复用光发送器，包括：光合成器，通过对第一光调制信号和第二光调制信号进行极化波多路复用产生偏振波复用光信号; 光功率波动部分周期性地波动第一光调制信号和第二光调制信号的光功率; 总光功率检测部分，检测偏振波复用光信号的总光功率的波动量; 以及光功率控制器，其基于所述总光功率检测部的检测结果，降低所述第一光调制信号与所述第二光调制信号之间的光功率差。

3. 发明授权

US08400702B2 Optical modulation device and optical modulation method 有权
标题翻译：光调制装置及光调制方式
公开(公告)号：US08400702B2
公开(公告)日：2013-03-19
申请号：US12805065
申请日：2010-07-09
申请人： Toshiki Tanaka , Hideyuki Miyata , Yuichi Akiyama , Takeshi Hoshida
发明人： Toshiki Tanaka , Hideyuki Miyata , Yuichi Akiyama , Takeshi Hoshida
IPC分类号： G02B26/00
CPC分类号： G02F1/2255 , G02F1/0123 , H04B10/505 , H04B10/5162 , H04B10/5167 , H04B10/5561
摘要： According to an aspect of an embodiment, an optical modulation device includes a Mach-Zehnder modulator and a controller. The Mach-Zehnder modulator is supplied a drive signal and a bias voltage. The Mach-Zehnder modulator modulates inputted light on the bases of the drive signal and the bias voltage. The drive signal selectively is superimposes a predetermined frequency signal. The bias voltage selectively is superimposes the predetermined frequency signal. The controller selects a superimposing target which is the drive signal or the bias voltage so as to change modulation formats.
摘要翻译：根据实施例的一个方面，光调制装置包括马赫 - 曾德调制器和控制器。马赫曾德尔调制器提供驱动信号和偏置电压。 Mach-Zehnder调制器根据驱动信号和偏置电压调制输入的光。驱动信号选择性地叠加预定的频率信号。选择性地将偏置电压叠加在预定频率信号上。控制器选择作为驱动信号或偏置电压的叠加目标，以便改变调制格式。

4. 发明申请

US20120141145A1 DQPSK OPTICAL RECEIVER 有权
标题翻译： DQPSK光接收机
公开(公告)号：US20120141145A1
公开(公告)日：2012-06-07
申请号：US13372687
申请日：2012-02-14
申请人： Yuichi AKIYAMA , Toshiki Tanaka
发明人： Yuichi AKIYAMA , Toshiki Tanaka
IPC分类号： H04B10/06
CPC分类号： H04B10/677
摘要： According to an aspect of an embodiment, a DQPSK optical receiver, comprising: a first LPF connected to a line branching off from between a first optical-electrical converter and a first data recovery circuit; a second LPF connected to a line branching off from between a second optical-electrical converter and a second data recovery circuit; a first LIA for amplifying a signal output from the first LPF and also limiting an amplitude of an output signal thereof; a second LIA for amplifying a signal output from the second LPF and also limiting an amplitude of an output signal thereof; a first mixer for multiplying the output signal from the first LIA by a signal output from the second LPF; and a second mixer for multiplying the output signal from the second LIA by a signal output from the first LPF.
摘要翻译：根据实施例的一个方面，一种DQPSK光接收机，包括：第一LPF，其连接到从第一光电转换器和第一数据恢复电路之间分支的线路; 连接到从第二光电转换器和第二数据恢复电路之间分支的线路的第二LPF; 第一LIA，用于放大从第一LPF输出的信号，并且还限制其输出信号的幅度; 第二LIA，用于放大从第二LPF输出的信号，并且还限制其输出信号的幅度; 第一混频器，用于将来自第一LIA的输出信号乘以从第二LPF输出的信号; 以及第二混频器，用于将来自第二LIA的输出信号乘以从第一LPF输出的信号。

5. 发明申请

US20120082465A1 OPTICAL TRANSMITTING APPARATUS, OPTICAL RECEIVING APPARATUS, AND OPTICAL COMMUNICATION SYSTEM COMPRISING THEM 有权
标题翻译：光传输装置，光接收装置，以及包含它们的光通信系统
公开(公告)号：US20120082465A1
公开(公告)日：2012-04-05
申请号：US12879820
申请日：2010-09-10
申请人： Yuichi Akiyama , Takeshi Hoshida , Akira Miura , Yutaka Kai , Hiroki Ooi , Jens Rasmussen , Kentaro Nakamura , Naoki Kuwata , Yoshinori Nishizawa , Tomoo Takahara , Masahiro Yuki
发明人： Yuichi Akiyama , Takeshi Hoshida , Akira Miura , Yutaka Kai , Hiroki Ooi , Jens Rasmussen , Kentaro Nakamura , Naoki Kuwata , Yoshinori Nishizawa , Tomoo Takahara , Masahiro Yuki
IPC分类号： H04B10/06 , H04B10/00
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。

6. 发明授权

US08145069B2 Optical transmitter 有权
标题翻译：光发射机
公开(公告)号：US08145069B2
公开(公告)日：2012-03-27
申请号：US11740954
申请日：2007-04-27
申请人： Toshiki Tanaka , Takeshi Hoshida , Hisao Nakashima , Yuichi Akiyama
发明人： Toshiki Tanaka , Takeshi Hoshida , Hisao Nakashima , Yuichi Akiyama
IPC分类号： H04B10/04
CPC分类号： H04B10/50572 , H04B10/505 , H04B10/50575 , H04B10/564
摘要： A signal Data1 and Data2 are output from a DQPSK signal source. The output signal is input to the modulator drivers 1 and 2 of the differential output. A drive signal is applied from the drivers 1 and 2 to a modulator, and modulated light is output. An optical coupler 20 branches modulator output, and a power monitor 21 detects the power of the branched light. A detection result is transmitted to an amplitude control unit 22. The amplitude control unit 22 adjusts the amplitude of the drivers 1 and 2 such that the detection result of the power monitor 21 can be the maximum.
摘要翻译：从DQPSK信号源输出信号Data1和Data2。输出信号被输入到差分输出的调制器驱动器1和2。将驱动信号从驱动器1和2施加到调制器，并输出调制光。光耦合器20分支调制器输出，功率监视器21检测分支光的功率。检测结果被发送到幅度控制单元22.振幅控制单元22调节驱动器1和2的振幅，使得功率监视器21的检测结果可以是最大的。

7. 发明授权

US07933519B2 Optical cross-connect using wavelength selective switches 有权
标题翻译：使用波长选择开关进行光交叉连接
公开(公告)号：US07933519B2
公开(公告)日：2011-04-26
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N个输入路由中的每一个的2×N（2输入，N输出）波长选择开关，N ×2（N输入，2输出）波长选择开关。每个2×N波长选择开关的一个输入端口从相应的输入路由接收光信号，而其它输入端口从相应的添加路由接收光信号。每个N×2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。

8. 发明申请

US20110038636A1 Optical Add/Drop Multiplexer 有权
标题翻译：光分插复用器
公开(公告)号：US20110038636A1
公开(公告)日：2011-02-17
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： H04J14/02
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。

9. 发明申请

US20110026935A1 OPTICAL SIGNAL TRANSMITTER AND METHOD FOR CONTROLLING POLARIZATION MULTIPLEXED OPTICAL SIGNAL 有权
标题翻译：光信号发射机和控制偏振多光信号的方法
公开(公告)号：US20110026935A1
公开(公告)日：2011-02-03
申请号：US12839102
申请日：2010-07-19
申请人： Yuichi Akiyama , Noriaki Mizuguchi
发明人： Yuichi Akiyama , Noriaki Mizuguchi
IPC分类号： H04B10/04
CPC分类号： H04B10/5053 , H04B10/5057 , H04B10/50572 , H04B10/50575 , H04J14/06
摘要： An optical signal transmitter includes: first outer modulator to generate first modulated optical signal, the first outer modulator including a pair of optical paths and a first phase shifter to give phase difference to the pair of optical paths; second outer modulator to generate second modulated optical signal, the second outer modulator including a pair of optical paths and a second phase shifter to give phase difference to the pair of optical paths; combiner to generate polarization multiplexed optical signal by combining the first and second modulated optical signals; phase controller to control the phase difference by the first phase shifter to A−Δφ and control the phase difference by the second phase shifter to A+Δφ; and power controller to control at least one of the first and second outer modulators based on AC component of the polarization multiplexed optical signal.
摘要翻译：光信号发射机包括：第一外调制器，用于产生第一调制光信号，第一外调制器包括一对光路和第一移相器，以给予该对光路的相位差; 第二外调制器以产生第二调制光信号，所述第二外调制器包括一对光路和第二移相器，以向所述一对光路提供相位差; 组合器，通过组合第一和第二调制光信号来产生偏振复用光信号; 相位控制器通过第一移相器将相位差控制为A-＆Dgr;＆phgr; 并将第二移相器的相位差控制为A +＆Dgr;＆phgr;; 以及功率控制器，用于基于偏振复用光信号的AC分量来控制第一和第二外调制器中的至少一个。

10. 发明授权

US07848659B2 Optical transmitting apparatus and optical communication system 有权
标题翻译：光发射装置和光通信系统
公开(公告)号：US07848659B2
公开(公告)日：2010-12-07
申请号：US11298892
申请日：2005-12-12
申请人： Akira Miura , Kentaro Nakamura , Hiroshi Onaka , Yuichi Akiyama , Hiroki Ooi , Jens Rasmussen , Takeshi Hoshida
发明人： Akira Miura , Kentaro Nakamura , Hiroshi Onaka , Yuichi Akiyama , Hiroki Ooi , Jens Rasmussen , Takeshi Hoshida
IPC分类号： H04B10/04
CPC分类号： G02F1/0123 , G02F1/2255 , H04B10/505 , H04B10/5051 , H04B10/5053 , H04B10/50575 , H04B10/50577 , H04B10/50597 , H04B10/58
摘要： A data modulator unit generates a DQPSK optical signal in accordance with a data signal. A phase shift unit provides a phase difference of π/2 between a pair of arms. A photodetector converts an output signal of the data modulator unit into an electrical signal. A filter is a low-pass filter with a cut-off frequency lower than a symbol frequency, and filters an output signal of the photodetector. A monitor unit detects power of an output signal of the filter. A phase difference control unit adjusts the amount of phase shift in the phase shift unit so as to minimize power of an output signal of the filter.
摘要翻译：数据调制器单元根据数据信号产生DQPSK光信号。相移单元在一对臂之间提供＆pgr / / 2的相位差。光电检测器将数据调制器单元的输出信号转换为电信号。滤波器是具有低于符号频率的截止频率的低通滤波器，并对光电检测器的输出信号进行滤波。监视器单元检测滤波器的输出信号的功率。相位差控制单元调整相移单元中的相移量，以使滤波器的输出信号的功率最小化。

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