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1. 发明授权

US5074631A Optical modulator 失效
标题翻译：光学调制器
公开(公告)号：US5074631A
公开(公告)日：1991-12-24
申请号：US492129
申请日：1990-03-13
申请人： Hiroshi Hamano , Izumi Amemiya , Hiroshi Nishimoto , Takefumi Namiki , Izumi Yokota , Tadashi Okiyama , Minoru Seino
发明人： Hiroshi Hamano , Izumi Amemiya , Hiroshi Nishimoto , Takefumi Namiki , Izumi Yokota , Tadashi Okiyama , Minoru Seino
IPC分类号： G02F1/03 , G02F1/225 , G02F1/313 , H04B10/2507
CPC分类号： G02F1/0327 , G02F1/225 , G02F1/3136 , H04B10/2507 , G02F2201/127
摘要： A Mach-Zehnder interferometer type modulator, constructed of first and second optical waveguides, first and second electrodes cooperating with the same, and a driving voltage source, wherein a driving voltage source is constructed of first and second driving units which drive independently the first and second electrodes in accordance with a data input and wherein the first and second driving units apply first and second driving voltages, individually determined, to the first and second electrodes.

2. 发明申请

US20050259990A1 Optical transmission system 有权
标题翻译：光传输系统
公开(公告)号：US20050259990A1
公开(公告)日：2005-11-24
申请号：US10939410
申请日：2004-09-14
申请人： Izumi Yokota
发明人： Izumi Yokota
IPC分类号： H04B10/00 , H04B10/27 , H04B10/29 , H04B10/297 , H04J14/02
CPC分类号： H04B10/2937
摘要： An optical transmission system which permits transmission distance to be prolonged without using repeaters and yet ensures economical, high-quality optical transmission. A branch station performs non-repeated communication with an optical branching point and includes a light pumping section for causing pump light to enter an optical fiber through which a branched, receiving optical signal flows, to perform optical amplification by using the fiber as an amplification medium. An optical branching device includes an optical amplification section and an optical branching section. The optical amplification section redirects the pump light originated from the branch station and propagated through a line to the paired line through which an optical signal transmitted from the branch station flows, to excite an amplification medium inserted in the paired line and doped with active material for optical amplification and thereby amplify power of the optical signal transmitted from the branch station. The optical branching section branches the optical signal transmitted from the branch station and optical signals transmitted from other stations.
摘要翻译：允许传输距离延长而不使用中继器并且确保经济，高质量的光传输的光传输系统。分支站与光分支点进行非重复通信，并且包括：光泵浦部，其使泵浦光进入分支的接收光信号流过的光纤，通过使用该光纤作为放大介质进行光放大。光分支装置包括光放大部分和光分支部分。光放大部分将来自分支站的泵浦光重定向并通过一条线传播到从分支站发送的光信号流过的成对线路，以激发插入成对线路中的放大介质并掺杂活性物质光放大，从而放大从分支站发送的光信号的功率。光分路部对从分支站发送的光信号和从其他站发送的光信号进行分支。

3. 发明授权

US07146071B2 Optical transmission system 有权
标题翻译：光传输系统
公开(公告)号：US07146071B2
公开(公告)日：2006-12-05
申请号：US10939410
申请日：2004-09-14
申请人： Izumi Yokota
发明人： Izumi Yokota
IPC分类号： G02B6/26 , H04J14/02
CPC分类号： H04B10/2937
摘要： An optical transmission system which permits transmission distance to be prolonged without using repeaters and yet ensures economical, high-quality optical transmission. A branch station performs non-repeated communication with an optical branching point and includes a light pumping section for causing pump light to enter an optical fiber through which a branched, receiving optical signal flows, to perform optical amplification by using the fiber as an amplification medium. An optical branching device includes an optical amplification section and an optical branching section. The optical amplification section redirects the pump light originated from the branch station and propagated through a line to the paired line through which an optical signal transmitted from the branch station flows, to excite an amplification medium inserted in the paired line and doped with active material for optical amplification and thereby amplify power of the optical signal transmitted from the branch station. The optical branching section branches the optical signal transmitted from the branch station and optical signals transmitted from other stations.
摘要翻译：允许传输距离延长而不使用中继器并且确保经济，高质量的光传输的光传输系统。分支站与光分支点进行非重复通信，并且包括：光泵浦部，其使泵浦光进入分支的接收光信号流过的光纤，通过使用该光纤作为放大介质进行光放大。光分支装置包括光放大部分和光分支部分。光放大部分将来自分支站的泵浦光重定向并通过一行传播到从分支站发送的光信号流过的成对线路，以激发插入成对线路中的放大介质并掺杂活性材料光放大，从而放大从分支站发送的光信号的功率。光分路部对从分支站发送的光信号和从其他站发送的光信号进行分支。

4. 发明授权

US08351790B2 Optical OADM transmission system with loopback 失效
标题翻译：光接口OADM传输系统具有环回功能
公开(公告)号：US08351790B2
公开(公告)日：2013-01-08
申请号：US12892915
申请日：2010-09-28
申请人： Yuhiro Midorikawa , Izumi Yokota
发明人： Yuhiro Midorikawa , Izumi Yokota
IPC分类号： H04J14/02
CPC分类号： H04J14/0287 , H04J14/0201 , H04J14/0204 , H04J14/0205 , H04J14/0206 , H04J14/0212 , H04J14/0213 , H04J14/0217
摘要： An optical transmission system including: first, second, and third stations; a main transmission path that bi-directionally couples the first station with the second station; and an optical add/drop multiplexer (OADM) disposed on the main transmission path, the OADM branching light from the first and second station, combining light from the third station to the main transmission path; wherein the OADM includes an input determination unit and an optical path switching unit, the input determination unit detects the power of the lights, and determines whether each of the input lights is lost or not, and the optical path switching unit forms a loop-back route based on the determination.
摘要翻译：一种光传输系统，包括：第一，第二和第三站; 将第一站与第二站双向耦合的主传输路径; 以及配置在所述主传输路径上的光分插复用器（OADM），所述OADM分支来自所述第一和第二站的光，将来自所述第三站的光组合到所述主传输路径; 其中所述OADM包括输入确定单元和光路切换单元，所述输入确定单元检测所述光的功率，并且确定每个输入光是否丢失，并且所述光路切换单元形成环回路线基于确定。

5. 发明申请

US20100239260A1 OPTICAL TRANSMISSION APPARATUS, OPTICAL COMMUNICATION METHOD, AND OPTICAL COMMUNICATION SYSTEM 审中-公开
标题翻译：光传输设备，光通信方法和光通信系统
公开(公告)号：US20100239260A1
公开(公告)日：2010-09-23
申请号：US12725820
申请日：2010-03-17
申请人： Yasushi OIKAWA , Akira Sugiyama , Izumi Yokota
发明人： Yasushi OIKAWA , Akira Sugiyama , Izumi Yokota
IPC分类号： H04J14/02
CPC分类号： H04J14/0224 , H04B10/07953 , H04B10/2513 , H04B10/506 , H04B2210/254 , H04J14/0279
摘要： An optical transmission apparatus and method thereof is provided. The optical transmission apparatus includes transmission units configured to transmit lights having different wavelengths, a multiplexing unit configured to multiplex lights transmitted from the transmission units, and a controller configured to control wavelengths of the lights, where the controller includes a wavelength spacing processing unit that controls a spacing between the wavelengths on the basis of reception state information of an apparatus that has received the multiplexed light.
摘要翻译：提供了一种光传输装置及其方法。光传输装置包括被配置为透射具有不同波长的光的传输单元，复用单元，被配置为复用从传输单元传输的光;以及控制器，被配置为控制光的波长，其中控制器包括控制波长间隔处理单元基于已经接收到多路复用光的装置的接收状态信息，波长之间的间隔。

6. 发明授权

US06980745B2 Optical transmission system 失效
标题翻译：光传输系统
公开(公告)号：US06980745B2
公开(公告)日：2005-12-27
申请号：US10014442
申请日：2001-12-14
申请人： Hiroyuki Deguchi , Shin-ichirou Harasawa , Izumi Yokota
发明人： Hiroyuki Deguchi , Shin-ichirou Harasawa , Izumi Yokota
IPC分类号： G02F1/35 , H01S3/30 , H04B10/035 , H04B10/07 , H04B10/077 , H04B10/29 , H04B10/291 , H04B10/54 , H04B10/58 , H04B17/40 , H04B10/16
CPC分类号： H04B10/2918 , H04B10/0771 , H04B10/0777 , H04B10/2916 , H04B2210/074 , H04B2210/078
摘要： An optical transmission system ensuring high-quality monitor control even if an optical fiber fault occurs. A monitor instruction sending unit sends a monitor instruction. An operating condition recognizing unit receives a response signal and recognizes the operating condition. A filtering unit filters the monitor instruction and the response signal. A monitor control unit monitors the operating condition of its own repeater in response to the monitor instruction, and generates resultant response information. A pump unit generates a pump light to cause Raman amplification within an optical fiber transmission medium. A regeneration control unit performs a regeneration control of the response signal to thereby create a regenerated signal. A modulation control unit modulates the pump light by the response information or the regenerated signal to thereby generate the response signal.
摘要翻译：即使出现光纤故障，光传输系统也能保证高质量的监控。监视器指令发送单元发送监视指令。操作条件识别单元接收响应信号并识别操作条件。滤波单元过滤监视指令和响应信号。监视器控制单元响应于监视指令来监视其自身中继器的工作状态，并产生合成响应信息。泵单元产生泵浦光以在光纤传输介质内引起拉曼放大。再生控制单元执行响应信号的再生控制，从而产生再生信号。调制控制单元通过响应信息或再生信号来调制泵浦光，从而产生响应信号。

7. 发明授权

US07657176B2 Method, apparatus, and system for evaluating faulty point in multi-stage optical amplifying and repeating transmission line 有权
标题翻译：用于评估多级光放大和重复传输线路故障点的方法，装置和系统
公开(公告)号：US07657176B2
公开(公告)日：2010-02-02
申请号：US11197595
申请日：2005-08-05
申请人： Izumi Yokota , Katsuji Yamaguchi
发明人： Izumi Yokota , Katsuji Yamaguchi
IPC分类号： H04B10/08 , H04B10/00
CPC分类号： H04B10/0791 , H04B10/07953 , H04B10/0797
摘要： A method, apparatus, and system for evaluation of a faulty point in a multi-stage optical amplifying and repeating transmission line which provides a totally new technique for searching for faults neither of the typical “command response type” or the “DCR method”. When a fault occurs in an optical submarine cable, the profile exhibited by the optical spectral characteristics of the optical noise signal (ASE) successively amplified through the chain of optical amplifying repeaters at the downstream side of the faulty point changes in accordance with the number of the repeaters. The technique finds the number of the repeaters until the faulty point based on the change in the profile so as to evaluate the location of the faulty point and has a step (S11) of monitoring the optical spectrum at the light receiving end and a step (S12) of determining the location of the faulty point from the monitored optical spectrum.
摘要翻译：一种用于评估多级光放大和重复传输线中的故障点的方法，装置和系统，其提供了用于搜索典型“命令响应类型”或“DCR方法”的全新技术。当光学海底电缆发生故障时，由故障点下游侧的光放大中继器链连续放大的光学噪声信号（ASE）的光谱特性所呈现的分布根据中继器。该技术基于轮廓的变化来找到直到故障点的中继器的数量，以评估故障点的位置，并且具有监视光接收端的光谱的步骤（S11）和步骤 S12）从所监视的光谱确定故障点的位置。

8. 发明申请

US20060216038A1 Method, apparatus, and system for evaluating faulty point in multi-stage optical amplifying and repeating transmission line 有权
标题翻译：用于评估多级光放大和重复传输线路故障点的方法，装置和系统
公开(公告)号：US20060216038A1
公开(公告)日：2006-09-28
申请号：US11197595
申请日：2005-08-05
申请人： Izumi Yokota , Katsuji Yamaguchi
发明人： Izumi Yokota , Katsuji Yamaguchi
IPC分类号： H04B10/00
CPC分类号： H04B10/0791 , H04B10/07953 , H04B10/0797
摘要： A method, apparatus, and system for evaluation of a faulty point in a multi-stage optical amplifying and repeating transmission line which provides a totally new technique for searching for faults neither of the typical “command response type” or the “DCR method”. When a fault occurs in an optical submarine cable, the profile exhibited by the optical spectral characteristics of the optical noise signal (ASE) successively amplified through the chain of optical amplifying repeaters at the downstream side of the faulty point changes in accordance with the number of the repeaters. The technique finds the number of the repeaters until the faulty point based on the change in the profile so as to evaluate the location of the faulty point and has a step (S11) of monitoring the optical spectrum at the light receiving end and a step (S12) of determining the location of the faulty point from the monitored optical spectrum.
摘要翻译：一种用于评估多级光放大和重复传输线中的故障点的方法，装置和系统，其提供了用于搜索典型“命令响应类型”或“DCR方法”的全新技术。当光学海底电缆发生故障时，由故障点下游侧的光放大中继器链连续放大的光学噪声信号（ASE）的光谱特性所呈现的分布根据中继器。该技术基于轮廓的变化来找到直到故障点为止的中继器的数量，以评估故障点的位置，并且具有监视光接收端的光谱的步骤（S11）和步骤（S12）从所监视的光谱确定故障点的位置。

9. 发明授权

US06424459B1 Gain-flattening of an optical amplifier with split-band architecture 有权
标题翻译：具有分频架构的光放大器的增益平坦化
公开(公告)号：US06424459B1
公开(公告)日：2002-07-23
申请号：US09532782
申请日：2000-03-22
申请人： Izumi Yokota
发明人： Izumi Yokota
IPC分类号： H01S300
CPC分类号： H04B10/2942 , H04B2210/258
摘要： The optical amplifier according to the present invention includes a first optical amplifier for a first band (e.g., conventional band: C band), a second optical amplifier for a second band (e.g., long-wavelength band: L band), an optical demultiplexer and an optical multiplexer for connecting the first and second optical amplifiers in parallel, and a control unit for controlling the first and second optical amplifiers so that the optical power at an output port becomes constant. With this configuration, band broadening can be attained by adopting the first and second optical amplifiers, and the configuration can be simplified by using the control unit commonly for the first and second optical amplifiers.
摘要翻译：根据本发明的光放大器包括用于第一频带（例如，常规频带：C频带）的第一光放大器，用于第二频带（例如，长波段：L频带）的第二光放大器，光解复用器以及用于并联连接第一和第二光放大器的光复用器，以及用于控制第一和第二光放大器使得输出端口处的光功率恒定的控制单元。利用这种配置，可以通过采用第一和第二光放大器来实现带宽化，并且可以通过使用第一和第二光放大器通常的控制单元来简化配置。

10. 发明授权

US5875045A Wavelength-multiplexing optical communication method employing RZ signals, wavelength-multiplexing optical sending apparatus employing RZ signals, and wavelength-multiplexing optical communication system employing RZ signals 失效
标题翻译：使用RZ信号的波分复用光通信方法，采用RZ信号的波长复用光发送装置，以及采用RZ信号的波长复用光通信系统
公开(公告)号：US5875045A
公开(公告)日：1999-02-23
申请号：US768345
申请日：1996-12-17
申请人： Akira Sugiyama , Izumi Yokota
发明人： Akira Sugiyama , Izumi Yokota
IPC分类号： H04J14/00 , H04B10/079 , H04B10/2507 , H04B10/255 , H04B10/2557 , H04B10/294 , H04J14/02 , H04J14/08 , H04L5/02
CPC分类号： H04B10/2557 , H04J14/0221 , H04J14/08
摘要： An RZ (return-to-zero) signal mode is adopted as a transmission coding format, whereby the effect of cross phase modulation is suppressed. The duty factor of each of signal light waves is allowed to vary at a digital signal processing stage, whereby the average power levels of the signal light waves are controlled so as to become constant in an optical repeater, with the result that the peak power levels of the signal light waves are allowed to vary. In consequence, the transmission characteristics of the signal light waves can be varied.
摘要翻译：采用RZ（归零）信号模式作为传输编码格式，从而抑制交叉相位调制的影响。允许每个信号光波的占空因数在数字信号处理阶段发生变化，由此控制信号光波的平均功率电平，以便在光中继器中变得恒定，结果峰值功率电平的信号光波被允许变化。因此，可以改变信号光波的传输特性。

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