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1. 发明授权

US06661974B1 Optical transmitter and optical transmission system 失效
标题翻译：光发射机和光传输系统
公开(公告)号：US06661974B1
公开(公告)日：2003-12-09
申请号：US09407369
申请日：1999-09-28
申请人： Yuichi Akiyama , George Ishikawa , Hiroki Ooi , Terumi Chikama
发明人： Yuichi Akiyama , George Ishikawa , Hiroki Ooi , Terumi Chikama
IPC分类号： H04J1402
CPC分类号： H04J14/02 , H04B10/2513 , H04B2210/254 , H04J14/0221
摘要： An optical transmitter having a function which compensates for wavelength dispersion is provided with a plurality of light sources for outputting light having wavelengths that differ from one another. Before the optical transmission system begins operating, the wavelength of light output to an optical transmission line is varied by changing over the light sources in order to detect a wavelength whose transmission characteristic is optimum with regard to wavelength dispersion exhibited by this optical transmission line. During system operation, the light having the detected optimum wavelength is output to the optical transmission line.
摘要翻译：具有补偿波长色散的功能的光发射机设置有用于输出具有彼此不同的波长的光的多个光源。在光传输系统开始工作之前，通过改变光源来改变输出到光传输线的光的波长，以便检测相对于该光传输线所表现出的波长色散的透射特性最佳的波长。在系统操作期间，将具有检测到的最佳波长的光输出到光传输线。

2. 发明授权

US06728491B1 Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling method 失效
标题翻译：偏振模色散检测方法以及色散补偿控制装置和色散补偿控制方法
公开(公告)号：US06728491B1
公开(公告)日：2004-04-27
申请号：US09359112
申请日：1999-07-23
申请人： Hiroki Ooi , George Ishikawa , Yuichi Akiyama
发明人： Hiroki Ooi , George Ishikawa , Yuichi Akiyama
IPC分类号： H04B1018
CPC分类号： H04B10/2507 , H04B10/2513 , H04B10/2569 , H04B10/2572
摘要： A dispersion compensation controlling apparatus used in a very high-speed optical communication system adopting optical time division multiplexing system comprises a first specific frequency component detecting unit (2a) detecting a first specific frequency component in a baseband spectrum in a transmission optical signal inputted to a receiving side over a transmission fiber as a transmission line (6a), a first intensity detecting unit (3a) detecting information on an intensity of the first specific frequency component detected by the first specific frequency component detecting unit (2a), and a polarization-mode dispersion controlling unit (220a) controlling a polarization-mode dispersion quantity of the transmission line (6a) such that the intensity of the first specific frequency component detected by the first intensity detecting unit (3a) becomes the maximum, thereby easily detecting and compensating polarization-mode dispersion generated in a high-speed optical signal.
摘要翻译：在采用光时分多路复用系统的非常高速的光通信系统中使用的色散补偿控制装置包括：第一特定频率分量检测单元（2a），检测输入到第一特定频率分量复用系统的传输光信号的基带频谱中的第一特定频率分量接收侧通过作为传输线（6a）的传输光纤，检测关于由第一特定频率分量检测单元（2a）检测的第一特定频率分量的强度的信息的第一强度检测单元（3a）控制所述传输线（6a）的偏振模色散量使得由所述第一强度检测单元（3a）检测到的所述第一特定频率分量的强度变为最大的模式色散控制单元（220a），从而容易地检测和补偿在高速光信号中产生的偏振模色散。

3. 发明授权

US5982530A Apparatus for driving an optical modulator to measure, and compensate for, dispersion in an optical transmission line 有权
标题翻译：用于驱动光调制器以测量和补偿光传输线中的色散的装置
公开(公告)号：US5982530A
公开(公告)日：1999-11-09
申请号：US245920
申请日：1999-02-08
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
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。

4. 发明申请

US20060115278A1 Optical receiving station, optical communication system, and dispersion controlling method 有权
标题翻译：光接收站，光通信系统和色散控制方法
公开(公告)号：US20060115278A1
公开(公告)日：2006-06-01
申请号：US11300316
申请日：2005-12-15
申请人： Yuichi Akiyama , Hiroki Ooi , George Ishikawa
发明人： Yuichi Akiyama , Hiroki Ooi , George Ishikawa
IPC分类号： H04B10/12
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.
摘要翻译：本发明涉及一种光接收站，光通信系统和色散控制方法，用于精确地控制随时间变化的光传输线中的光传输线或色散中的色散。光接收站设置有色散补偿部分，用于经由光传输线路接收根据光二进制调制方法调制的光信号，并用于改变用于补偿光学色散的色散值传输线，用于检测从色散补偿部分输出的光信号的特定频率分量的强度的强度检测部分，以及用于调整色散补偿部分的色散值的控制部分，使得强度检测部分具有预定的极值。

5. 发明授权

US07006770B2 Optical receiving station, optical communication system, and dispersion controlling method 失效
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.

6. 发明授权

US5973816A Method and apparatus of driving an optical modulator to measure, and compensation for dispersion in an optical transmission line 失效
标题翻译：驱动光调制器以测量和补偿光传输线中色散的方法和装置
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。

7. 发明授权

US07321736B2 Optical receiving station, optical communication system, and dispersion controlling method 有权
标题翻译：光接收站，光通信系统和色散控制方法
公开(公告)号：US07321736B2
公开(公告)日：2008-01-22
申请号：US11300316
申请日：2005-12-15
申请人： Yuichi Akiyama , Hiroki Ooi , George Ishikawa
发明人： Yuichi Akiyama , Hiroki Ooi , George Ishikawa
IPC分类号： H04B10/06 , 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.
摘要翻译：本发明涉及一种光接收站，光通信系统和色散控制方法，用于精确地控制随时间变化的光传输线中的光传输线或色散中的色散。光接收站设置有色散补偿部分，用于经由光传输线路接收根据光二进制调制方法调制的光信号，并用于改变用于补偿光学色散的色散值传输线，用于检测从色散补偿部分输出的光信号的特定频率分量的强度的强度检测部分，以及用于调整色散补偿部分的色散值的控制部分，使得强度检测部分具有预定的极值。

8. 发明授权

US07035548B2 Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling method 失效
标题翻译：偏振模色散检测方法以及色散补偿控制装置和色散补偿控制方法
公开(公告)号：US07035548B2
公开(公告)日：2006-04-25
申请号：US10779797
申请日：2004-02-18
申请人： Hiroki Ooi , George Ishikawa , Yuichi Akiyama
发明人： Hiroki Ooi , George Ishikawa , Yuichi Akiyama
IPC分类号： H04B10/18
CPC分类号： H04B10/2507 , H04B10/2513 , H04B10/2569 , H04B10/2572
摘要： A dispersion compensation controlling apparatus used in a very high-speed optical communication system adopting optical time division multiplexing system comprises a first specific frequency component detecting unit (2a) detecting a first specific frequency-component in a baseband spectrum in a transmission optical signal inputted to a receiving side over a transmission fiber as a transmission line (6a), a first intensity detecting unit (3a) detecting information on an intensity of the first specific frequency component detected by the first specific frequency component detecting unit (2a and a polarization-mode dispersion controlling unit (220a) con trolling a polarization-mode dispersion quantity of the transmission line (6a) such that the intensity of the first specific frequency component detected by the first intensity detecting unit. (3a) becomes the maximum, thereby easily detecting and compensating polarization-mode dispersion generated in a high-speed optical signal.
摘要翻译：在采用光时分复用系统的非常高速的光通信系统中使用的色散补偿控制装置包括：第一特定频率分量检测单元（2a）检测输入的传输光信号中基带频谱中的第一特定频分量通过传输光纤作为传输线（6a）的接收侧，第一强度检测单元（3a）检测由第一特定频率分量检测单元（2a和...检测到的第一特定频率分量的强度的信息，控制传输线（6a）的偏振模色散量的偏振模色散控制单元（220a），使得由第一强度检测单元检测的第一特定频率分量的强度（3a）变为从而容易地检测和补偿在高速光学信号中产生的偏振模色散纳尔

9. 发明授权

US06262828B1 Method and apparatus of driving an optical modulator to measure, and compensate for, dispersion in an optical transmission line 有权
标题翻译：驱动光调制器以测量和补偿光传输线中的色散的方法和装置
公开(公告)号：US06262828B1
公开(公告)日：2001-07-17
申请号：US09257497
申请日：1999-02-25
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： G02F103
CPC分类号： H04B10/2525 , G02F1/0327 , G02F2001/212 , G02F2203/25 , G02F2203/26 , H04B10/25137 , 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。

10. 发明授权

US08867927B2 Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising them 有权
标题翻译：光发送装置，光接收装置和包括它们的光通信系统
公开(公告)号：US08867927B2
公开(公告)日：2014-10-21
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： H04B10/04
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。

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