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1. 发明授权

US08059971B2 Optical reception device 有权
标题翻译：光接收装置
公开(公告)号：US08059971B2
公开(公告)日：2011-11-15
申请号：US11792306
申请日：2004-12-28
申请人： Shunsuke Mitani , Kazuyuki Ishida , Katsuhiro Shimizu
发明人： Shunsuke Mitani , Kazuyuki Ishida , Katsuhiro Shimizu
IPC分类号： H04B10/00 , H04B10/06 , H04B10/04
CPC分类号： H04B10/66
摘要： An optical reception device realizes stabilization of reception sensitivity inexpensively and highly precisely. The optical reception device includes: a Mach-Zehnder type 1-bit delay unit including a one-terminal input port and two-terminal output ports for decoding an optical difference phase shift keying (DPSK) signal and provided with one or more phase control functions to control the phase state of light; photoelectric conversion means for branching a portion of an optical output signal output from the one-side output port of the Mach-Zehnder type 1-bit delay unit, to convert the branched portion into an electric signal; and a phase control unit for controlling the phase state of the Mach-Zehnder type 1-bit delay device by using as an error signal the output signal of the photoelectric conversion means.
摘要翻译：光接收装置实现了廉价高精度的接收灵敏度的稳定化。光接收装置包括：马赫 - 策德尔型1位延迟单元，其包括单端输入端口和用于解码光差分相移键控（DPSK）信号并具有一个或多个相位控制功能的两端输出端口控制光的相位状态; 光电转换装置，用于对从Mach-Zehnder型1位延迟单元的单面输出端口输出的光输出信号的一部分进行分支，将分支部分转换为电信号; 以及相位控制单元，用于通过使用光电转换装置的输出信号作为误差信号来控制马赫 - 曾德尔型1位延迟装置的相位状态。

2. 发明申请

US20080175602A1 Optical Reception Device 有权
标题翻译：光接收装置
公开(公告)号：US20080175602A1
公开(公告)日：2008-07-24
申请号：US11792306
申请日：2004-12-28
申请人： Shunsuke Mitani , Kazuyuki Ishida , Katsuhiro Shimizu
发明人： Shunsuke Mitani , Kazuyuki Ishida , Katsuhiro Shimizu
IPC分类号： H04B10/06
CPC分类号： H04B10/66
摘要： An optical reception device realizes stabilization of reception sensitivity inexpensively and highly precisely. The optical reception device includes: a Mach-Zehnder type 1-bit delay unit including a one-terminal input port and two-terminal output ports for decoding an optical difference phase shift keying (DPSK) signal and provided with one or more phase control functions to control the phase state of light; photoelectric conversion means for branching a portion of an optical output signal output from the one-side output port of the Mach-Zehnder type 1-bit delay unit, to convert the branched portion into an electric signal; and a phase control unit for controlling the phase state of the Mach-Zehnder type 1-bit delay device by using as an error signal the output signal of the photoelectric conversion means.
摘要翻译：光接收装置实现了廉价高精度的接收灵敏度的稳定化。光接收装置包括：马赫 - 策德尔型1位延迟单元，其包括单端输入端口和用于解码光差分相移键控（DPSK）信号并具有一个或多个相位控制功能的两端输出端口控制光的相位状态; 光电转换装置，用于对从Mach-Zehnder型1位延迟单元的单面输出端口输出的光输出信号的一部分进行分支，将分支部分转换为电信号; 以及相位控制单元，用于通过使用光电转换装置的输出信号作为误差信号来控制马赫 - 曾德尔型1位延迟装置的相位状态。

3. 发明申请

US20130039643A1 OPTICAL COMMUNICATION SYSTEM 审中-公开
标题翻译：光通信系统
公开(公告)号：US20130039643A1
公开(公告)日：2013-02-14
申请号：US13642723
申请日：2010-04-23
申请人： Toshiyuki Tokura , Katsuhiro Shimizu , Kazuyuki Ishida , Takashi Mizuochi
发明人： Toshiyuki Tokura , Katsuhiro Shimizu , Kazuyuki Ishida , Takashi Mizuochi
IPC分类号： H04J14/02
CPC分类号： H04J14/0297 , H04B10/032 , H04J14/0295
摘要： An optical communication system including optical transmission systems each includes a transmission processing unit and a receiving processing unit, wherein the transmission processing unit includes an optical transmission unit that converts electric signals into optical signals, an auxiliary optical transmission unit that converts a part of the electric signals into an optical signal having a wavelength other than wavelengths of the optical signals generated by the optical transmission unit, and outputs the generated optical signal to a different transmission processing unit, and a wavelength multiplexing unit, and the receiving processing unit includes a wavelength demultiplexing unit, an optical receiving unit that converts the optical signals having the wavelengths of the optical signals generated by the optical transmission unit into electric signals, respectively, and an auxiliary optical receiving unit that converts the optical signal having the wavelength of the optical signal generated by the auxiliary optical transmission unit.
摘要翻译：包括光传输系统的光通信系统各自包括传输处理单元和接收处理单元，其中传输处理单元包括将电信号转换为光信号的光传输单元，将一部分电信号转换成具有由光传输单元生成的光信号的波长以外的波长的光信号，并将生成的光信号输出到不同的发送处理单元和波长复用单元，并且接收处理单元包括波长解复用单元，光接收单元，其将具有由光传输单元生成的光信号的波长的光信号分别转换为电信号;以及辅助光接收单元，其将具有光信号波长的光信号由辅助光传输单元产生。

4. 发明授权

US07058313B2 Multi-value modulation apparatus 失效
公开(公告)号：US07058313B2
公开(公告)日：2006-06-06
申请号：US09969654
申请日：2001-10-04
申请人： Katsuhiro Shimizu , Kazuyuki Ishida , Yukio Kobayashi
发明人： Katsuhiro Shimizu , Kazuyuki Ishida , Yukio Kobayashi
IPC分类号： H04B10/04
CPC分类号： H04J14/02 , H04B10/504 , H04B10/541
摘要： In the multi-value modulation apparatus, one optical intensity detecting unit detects optical intensity of a modulation optical signal generated by one optical modulation signal generating unit and output from the variable optical attenuator. The detected optical intensity is provided to the comparator. Another optical intensity detecting unit detects optical intensity of a modulation optical signal output from another optical modulation signal generating unit. The attenuator attenuates the optical intensity detected by the another optical intensity detecting unit, and provides it to the comparator. The output of the comparator is provided to the optical variable attenuator as a control signal. The variable optical attenuator controls optical intensity of the modulation optical signal based on the control signal.

5. 发明授权

US06836622B2 Optical transmitter, and method of controlling bias voltage to the optical transmitter 失效
标题翻译：光发射机，以及控制光发射机偏置电压的方法
公开(公告)号：US06836622B2
公开(公告)日：2004-12-28
申请号：US09840183
申请日：2001-04-24
申请人： Tatsuya Kobayashi , Kazuyuki Ishida , Katsuhiro Shimizu , Yukio Kobayashi
发明人： Tatsuya Kobayashi , Kazuyuki Ishida , Katsuhiro Shimizu , Yukio Kobayashi
IPC分类号： H04B1004
CPC分类号： G02F1/0123 , G02F1/225 , G02F2001/212 , G02F2203/21
摘要： The optical transmitter comprises a light source which inputs continuous optical signal and a driving circuit which inputs driving signal to an optical modulator of Mach-Zehnder type. A photo coupler separates a part of the output of the optical modulator. A photo diode converts this part into electric signal. A band-pass filter and a pre-amplifier extract a frequency component of the driving signal contained in the electric signal. A mixer conducts synchronous detection between the driving signal and the extracted frequency component. Finally, a bias voltage control circuit controls a bias voltage based on a result of the phase comparison.
摘要翻译：光发射机包括输入连续光信号的光源和向Mach-Zehnder型光调制器输入驱动信号的驱动电路。光耦合器分离光调制器的一部分输出。光电二极管将该部分转换为电信号。带通滤波器和前置放大器提取包含在电信号中的驱动信号的频率分量。混频器在驱动信号和提取的频率分量之间进行同步检测。最后，偏置电压控制电路基于相位比较的结果来控制偏置电压。

6. 发明授权

US08208812B2 Optical relay device and optical relay transmission system 有权
标题翻译：光中继设备和光中继传输系统
公开(公告)号：US08208812B2
公开(公告)日：2012-06-26
申请号：US12299065
申请日：2006-05-25
申请人： Toshiyuki Tokura , Katsuhiro Shimizu , Kazuyuki Ishida , Kuniaki Motoshima
发明人： Toshiyuki Tokura , Katsuhiro Shimizu , Kazuyuki Ishida , Kuniaki Motoshima
IPC分类号： H04J14/02
CPC分类号： H04J14/0221 , H04B10/296 , H04J14/0204 , H04J14/0205 , H04J14/0206 , H04J14/021 , H04J14/0227 , H04J14/0246 , H04J14/0279
摘要： A control-target-value setting unit sets a control target value corresponding to the number of multiplexed wavelengths measured by a number-of-multiplexed-wavelengths measuring unit. A controller controls the variable optical attenuator based on the control target value. An optical amplifier performs an optical amplification with a constant gain regardless of power of a wavelength-multiplexed light. The controller performs feedback control of the variable optical attenuator such that a result of measurement of the total power of the wavelength-multiplexed light coincides with the control target value.
摘要翻译：控制目标值设定单元设定与多路复用波长测量单元测得的复用波长数对应的控制对象值。控制器根据控制目标值控制可变光衰减器。无论波分复用光的功率如何，光放大器都以恒定的增益进行光放大。控制器执行可变光衰减器的反馈控制，使得波分复用光的总功率的测量结果与控制目标值一致。

7. 发明申请

US20100239263A1 OPTICAL RELAY DEVICE AND OPTICAL RELAY TRANSMISSION SYSTEM 有权
标题翻译：光电继电器和光电继电器传输系统
公开(公告)号：US20100239263A1
公开(公告)日：2010-09-23
申请号：US12299065
申请日：2006-05-25
申请人： Toshiyuki Tokura , Katsuhiro Shimizu , Kazuyuki Ishida , Kuniaki Motoshima
发明人： Toshiyuki Tokura , Katsuhiro Shimizu , Kazuyuki Ishida , Kuniaki Motoshima
IPC分类号： H04J14/02
CPC分类号： H04J14/0221 , H04B10/296 , H04J14/0204 , H04J14/0205 , H04J14/0206 , H04J14/021 , H04J14/0227 , H04J14/0246 , H04J14/0279
摘要： A control-target-value setting unit sets a control target value corresponding to the number of multiplexed wavelengths measured by a number-of-multiplexed-wavelengths measuring unit. A controller controls the variable optical attenuator based on the control target value. An optical amplifier performs an optical amplification with a constant gain regardless of power of a wavelength-multiplexed light. The controller performs feedback control of the variable optical attenuator such that a result of measurement of the total power of the wavelength-multiplexed light coincides with the control target value.
摘要翻译：控制目标值设定单元设定与多路复用波长测量单元测得的复用波长数对应的控制对象值。控制器根据控制目标值控制可变光衰减器。无论波分复用光的功率如何，光放大器都以恒定的增益进行光放大。控制器执行可变光衰减器的反馈控制，使得波分复用光的总功率的测量结果与控制目标值一致。

8. 发明授权

US07092643B2 Optical transmission apparatus and bias voltage control method for the optical modulator 有权
公开(公告)号：US07092643B2
公开(公告)日：2006-08-15
申请号：US09892918
申请日：2001-06-28
申请人： Satoshi Kajiya , Kazuyuki Ishida , Katsuhiro Shimizu , Yukio Kobayashi
发明人： Satoshi Kajiya , Kazuyuki Ishida , Katsuhiro Shimizu , Yukio Kobayashi
IPC分类号： H04B10/04 , H04B10/12 , G02B26/00 , G02F1/01 , G02F1/23
CPC分类号： H04B10/58 , G02F1/0123 , G02F1/225 , G02F2203/20 , H04B10/505 , H04B10/50575 , H04B10/508
摘要： The optical transmission apparatus has a Mach-Zehnder optical modulator, a light source for applying an optical signal of a continuous light to the optical modulator, a driving circuit for inputting a driving signal into the optical modulator, a branching filter for taking out a part of an output optical signal, a photodiode for converting the taken-out output optical signal into an electric signal, a band pass filter for extracting a frequency component of a driving signal included in this electric signal, an error signal generator circuit for generating an error signal of a bias voltage that minimizes a value of the extracted frequency component, and a bias voltage control circuit for applying a bias voltage added with this error signal to the optical modulator.

9. 发明授权

US06832048B2 Dispersion compensation apparatus and a dispersion compensation system 失效
标题翻译：色散补偿装置和色散补偿系统
公开(公告)号：US06832048B2
公开(公告)日：2004-12-14
申请号：US09782258
申请日：2001-02-14
申请人： Kazuyuki Ishida , Katsuhiro Shimizu
发明人： Kazuyuki Ishida , Katsuhiro Shimizu
IPC分类号： H04J1402
CPC分类号： G02B6/12009 , H04B10/25133 , H04B2210/254 , H04B2210/258
摘要： An AWG (arrayed-waveguide grating/10A) divides input ports (11A1 to 11An+1−1) into 1 number of groups, each group comprising m number of input ports, and combines optical signals belonging to each of the groups. For example, the optical signals of wavelengths &lgr;1 to &lgr;m are input from the input ports (11A1 to 11Am) and output from an output port (12A1) as multiplex light. The multiplex light output in each of the groups in the above manner is input into a wave combination coupler (18A) and output to a transmission line (19A) as multiplex light of the optical signals of the wavelengths &lgr;1 to &lgr;n.
摘要翻译： AWG（阵列波导光栅/ 10A）将输入端口（11A1〜11An + 1-1）分割为1组，每组包含m个输入端口，并且组合属于每个组的光信号。例如，从输入端口（11A1〜11Am）输入波长λ1〜lambdam的光信号，作为多路光从输出端口（12A1）输出。以上述方式将各组中的多路复用光输出输入到波合成耦合器（18A）中，作为波长λ1〜lambdan的光信号的多路光输出到传输线（19A）。

10. 发明授权

US07801450B2 Optical transmitter and optical communication system 失效
标题翻译：光发射机和光通信系统
公开(公告)号：US07801450B2
公开(公告)日：2010-09-21
申请号：US11663743
申请日：2004-11-08
申请人： Jun′ichi Abe , Katsuhiro Shimizu
发明人： Jun′ichi Abe , Katsuhiro Shimizu
IPC分类号： H04B10/04
CPC分类号： H04B10/50575 , G02F1/0123 , H04B10/07957 , H04B10/505 , H04B10/5057 , H04B10/50572 , H04B10/50593 , H04B10/50595 , H04B10/572
摘要： An optical transmitter includes an optical modulator, an optical coupler, a crosspoint monitoring unit, a reference-value setting unit, and a bias circuit. The optical coupler splits an optical signal output from the optical modulator into a plurality of optical signals. The crosspoint monitoring unit receives part of the optical signals, and monitors a crosspoint of the optical signal output from the optical modulator. The reference-value setting unit sets a bias reference value to be assigned to the optical modulator based on an output of the crosspoint monitoring unit so that the crosspoint is constant. The bias circuit applies a bias to the optical modulator based on the bias reference value.
摘要翻译：光发射机包括光调制器，光耦合器，交叉点监测单元，基准值设定单元和偏置电路。光耦合器将从光调制器输出的光信号分离成多个光信号。交叉点监视单元接收部分光信号，并监视从光调制器输出的光信号的交叉点。基准值设定单元基于交叉点监视单元的输出设定分配给光调制器的偏置基准值，使得交叉点恒定。偏置电路基于偏置参考值向光学调制器施加偏置。

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