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1. 发明授权

US06362913B1 Optical modulation apparatus and method of controlling optical modulator 有权
公开(公告)号：US06362913B1
公开(公告)日：2002-03-26
申请号：US09773660
申请日：2001-02-02
申请人： Hiroki Ooi , Hiroshi Nakamoto , George Ishikawa , Takuji Yamamoto , Yoshinori Nishizawa
发明人： Hiroki Ooi , Hiroshi Nakamoto , George Ishikawa , Takuji Yamamoto , Yoshinori Nishizawa
IPC分类号： G02F103
摘要： An optical modulator having a voltage-optical output characteristic in which optical output varies periodically with respect to a voltage value of an electrical drive signal is driven by a modulator driving voltage signal, which has an amplitude of 2·V&pgr; between two light-emission culminations or two light extinction culminations of the voltage-optical output characteristic. A low-frequency superimposing unit superimposes a prescribed low-frequency signal on the modulator driving voltage signal, and an operating-point controller controls the operating point of the optical modulator by detecting operating-point drift of the optical modulator based upon the low-frequency signal component contained in an optical signal output from the optical modulator and controlling the bias voltage of the optical modulator in dependence upon the drift of the operating point of the optical modulator.

2. 发明授权

US06278539B1 Optical modulation apparatus and method of controlling 有权
标题翻译：光调制装置及光调制器的方法
公开(公告)号：US06278539B1
公开(公告)日：2001-08-21
申请号：US09348166
申请日：1999-07-07
申请人： Hiroki Ooi , Hiroshi Nakamoto , George Ishikawa , Takuji Yamamoto , Yoshinori Nishizawa
发明人： Hiroki Ooi , Hiroshi Nakamoto , George Ishikawa , Takuji Yamamoto , Yoshinori Nishizawa
IPC分类号： G02B2600
CPC分类号： G02F1/0123 , G02F2203/21
摘要： An optical modulator having a voltage—optical output characteristic in which optical output varies periodically with respect to a voltage value of an electrical drive signal is driven by a modulator driving voltage signal, which has an amplitude of 2·V&pgr; between two light-emission culminations or two light extinction culminations of the voltage—optical output characteristic. A low-frequency superimposing unit superimposes a prescribed low-frequency signal on the modulator driving voltage signal, and an operating-point controller controls the operating point of the optical modulator by detecting operating-point drift of the optical modulator based upon the low-frequency signal component contained in an optical signal output from the optical modulator and controlling the bias voltage of the optical modulator in dependence upon the drift of the operating point of the optical modulator.
摘要翻译：一种具有电压 - 光输出特性的光调制器，其中光输出相对于电驱动信号的电压值周期性变化，由调制器驱动电压信号驱动，该调制器驱动电压信号在两个发光峰值之间具有2.Vpi的幅度或电压 - 光输出特性的两个光消光结束。低频叠加单元将规定的低频信号叠加在调制器驱动电压信号上，工作点控制器通过基于低频来检测光调制器的工作点漂移来控制光调制器的工作点信号分量包含在从光调制器输出的光信号中，并且根据光调制器的工作点的漂移来控制光调制器的偏置电压。

3. 发明申请

US20100135664A1 Chromatic dispersion compensating apparatus 失效
标题翻译：色散补偿装置
公开(公告)号：US20100135664A1
公开(公告)日：2010-06-03
申请号：US12654752
申请日：2009-12-30
申请人： Hiroki Ooi , Takashi Iwabuchi , Takafumi Terahara , Junichi Kumasako , George Ishikawa , Tomoo Takahara
发明人： Hiroki Ooi , Takashi Iwabuchi , Takafumi Terahara , Junichi Kumasako , George Ishikawa , Tomoo Takahara
IPC分类号： H04J14/02
CPC分类号： H04B10/25133 , H04B2210/258
摘要： In order to compensate for chromatic dispersion ad dispersion slope over an entire wavelength band of the optical signal, the wavelength band is split into a plurality of bands, and chromatic dispersion compensation is made to make chromatic dispersion in a central wavelength of each of the bands zero.
摘要翻译：为了补偿在光信号的整个波长带上的色散和色散斜率，波长带被分成多个频带，并且进行色散补偿以使得每个频带的中心波长的色散零。

4. 发明授权

US07616893B2 Wavelength division multiplexing optical repeating transmission method and repeating apparatus 失效
标题翻译：波分复用光中继传输方法和中继装置
公开(公告)号：US07616893B2
公开(公告)日：2009-11-10
申请号：US10781783
申请日：2004-02-20
申请人： Hiroki Ooi , Takashi Iwabuchi , Takafumi Terahara , George Ishikawa
发明人： Hiroki Ooi , Takashi Iwabuchi , Takafumi Terahara , George Ishikawa
IPC分类号： H04J14/02
CPC分类号： H04J14/0201 , H04B10/2513
摘要： A repeating apparatus disposed at an end point of each divisional repeating interval of a light transmission line performs a first dispersion compensation step, an optical add/drop multiplexing step and a second dispersion compensation step to perform repeating transmission. The ratio of an over compensation amount at the second dispersion compensation step to the sum of dispersion compensation amounts at the first and second dispersion compensation steps is set so as to gradually vary together with the transmission distance from the terminal apparatus for transmission at which the repeating apparatus is disposed on the light transmission line so that degradation of wavelengths to be received by the terminal apparatus for reception is suppressed while dispersion compensation is performed with a high degree of accuracy at each optical add/drop multiplexing point on the transmission line.
摘要翻译：设置在光传输线的每个分割重复间隔的终点处的中继装置执行第一色散补偿步骤，光分插复用步骤和第二色散补偿步骤，以执行重复发送。在第二色散补偿步骤中的过度补偿量与第一和第二色散补偿步骤之间的色散补偿量之和的比率被设置为随着与重复发送的终端装置的传输距离一起逐渐变化装置设置在光传输线上，从而抑制由终端装置接收的波长的劣化，同时在传输线上的每个光分插复用点处以高精度执行色散补偿。

5. 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。

6. 发明授权

US5991477A Optical transmission system, optical multiplexing transmission system, and related peripheral techniques 失效
标题翻译：光传输系统，光复用传输系统及相关外设技术
公开(公告)号：US5991477A
公开(公告)日：1999-11-23
申请号：US010518
申请日：1998-01-21
申请人： George Ishikawa , Hiroshi Nishimoto , Hiroki Ooi , Motoyoshi Sekiya , Hiroaki Tomofuji
发明人： George Ishikawa , Hiroshi Nishimoto , Hiroki Ooi , Motoyoshi Sekiya , Hiroaki Tomofuji
IPC分类号： H04B10/2507 , H04B10/071 , H04B10/2519 , H04B10/2525 , H04B10/2537 , H04B10/2563 , H04J14/02 , H04J14/08 , H04L7/00 , H04L7/027 , H04L7/033 , H04L7/06 , H04Q11/00 , H04Q11/04 , H04B1/06
CPC分类号： H04B10/25133 , H04B10/0795 , H04B10/07957 , H04B10/0797 , H04B10/0799 , H04B10/25137 , H04B10/2525 , H04B10/255 , H04B10/2563 , H04B10/66 , H04B10/67 , H04B10/675 , H04J14/086 , H04L7/0037 , H04L7/0075 , H04Q11/0001 , G02F2203/21 , H04B2210/252 , H04B2210/254 , H04J14/02 , H04J14/0298 , H04J14/08 , H04L7/027 , H04L7/06
摘要： The invention provides a technique for optimizing transmission conditions to achieve large-capacity transmission, and also provides peripheral techniques for the practical implementation of optical multiplexing that makes large-capacity transmission possible. A transmission characteristic is measured in a transmission characteristic measuring section, and control of signal light wavelength in a tunable light source, control of the amount of prechirping, control of the amount of dispersion compensation, and/or control of optical power are performed to achieve the best transmission characteristic. Wavelength dispersion is deliberately introduced by a dispersion compensator, to reduce nonlinear effects. A tunable laser is used to optimize signal light wavelength for each optical amplification repeater section. Peripheral technique, such as drift compensation, clock extraction, optical signal channel identification, clock phase stabilization, etc., are provided for the implementation of optical multiplexing.
摘要翻译：本发明提供了一种优化传输条件以实现大容量传输的技术，并且还提供了使得大容量传输成为可能的光复用的实际实现的外围技术。在透射特性测量部分中测量传输特性，并且执行可调谐光源中的信号光波长的控制，预激励量的控制，色散补偿量的控制和/或光功率的控制，以实现传输特性最好。波长色散由色散补偿器故意引入，以减少非线性效应。可调激光器用于优化每个光放大中继器部分的信号光波长。提供了诸如漂移补偿，时钟提取，光信号通道识别，时钟相位稳定等的外围技术用于实现光学复用。

7. 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。

8. 发明授权

US5896217A Optical transmission system, optical multiplexing transmission system, and related peripheral techniques 失效
公开(公告)号：US5896217A
公开(公告)日：1999-04-20
申请号：US782971
申请日：1997-01-14
申请人： George Ishikawa , Hiroshi Nishimoto , Hiroki Ooi , Motoyoshi Sekiya , Hiroaki Tomofuji
发明人： George Ishikawa , Hiroshi Nishimoto , Hiroki Ooi , Motoyoshi Sekiya , Hiroaki Tomofuji
IPC分类号： H04B10/2507 , H04B10/071 , H04B10/2519 , H04B10/2525 , H04B10/2537 , H04B10/2563 , H04J14/02 , H04J14/08 , H04L7/00 , H04L7/027 , H04L7/033 , H04L7/06 , H04Q11/00 , H04Q11/04 , H04B10/06
CPC分类号： H04B10/25133 , H04B10/0795 , H04B10/07957 , H04B10/0797 , H04B10/0799 , H04B10/25137 , H04B10/2525 , H04B10/255 , H04B10/2563 , H04B10/66 , H04B10/67 , H04B10/675 , H04J14/086 , H04L7/0037 , H04L7/0075 , H04Q11/0001 , G02F2203/21 , H04B2210/252 , H04B2210/254 , H04J14/02 , H04J14/0298 , H04J14/08 , H04L7/027 , H04L7/06
摘要： The invention provides a technique for optimizing transmission conditions to achieve large-capacity transmission, and also provides peripheral techniques for the practical implementation of optical multiplexing that makes large-capacity transmission possible. A transmission characteristic is measured in a transmission characteristic measuring section, and control of signal light wavelength in a tunable light source, control of the amount of prechirping, control of the amount of dispersion compensation, and/or control of optical power are performed to achieve the best transmission characteristic. Wavelength dispersion is deliberately introduced by a dispersion compensator, to reduce nonlinear effects. A tunable laser is used to optimize signal light wavelength for each optical amplification repeater section. Peripheral techniques, such as drift compensation, clock extraction, optical signal channel identification, clock phase stabilization, etc., are provided for the implementation of optical multiplexing.

9. 发明授权

US5815294A Optical transmission system with transmission characteristic measuring device 失效
标题翻译：具有传输特性测量装置的光传输系统
公开(公告)号：US5815294A
公开(公告)日：1998-09-29
申请号：US778544
申请日：1997-01-03
申请人： George Ishikawa , Hiroshi Nishimoto , Hiroki Ooi , Motoyoshi Sekiya , Hiroaki Tomofuji
发明人： George Ishikawa , Hiroshi Nishimoto , Hiroki Ooi , Motoyoshi Sekiya , Hiroaki Tomofuji
IPC分类号： H04B10/2507 , H04B10/071 , H04B10/2519 , H04B10/2525 , H04B10/2537 , H04B10/2563 , H04J14/02 , H04J14/08 , H04L7/00 , H04L7/027 , H04L7/033 , H04L7/06 , H04Q11/00 , H04Q11/04 , H04B10/08 , H04B10/00
CPC分类号： H04B10/25133 , H04B10/0795 , H04B10/07957 , H04B10/0797 , H04B10/0799 , H04B10/25137 , H04B10/2525 , H04B10/255 , H04B10/2563 , H04B10/66 , H04B10/67 , H04B10/675 , H04J14/086 , H04L7/0037 , H04L7/0075 , H04Q11/0001 , G02F2203/21 , H04B2210/252 , H04B2210/254 , H04J14/02 , H04J14/0298 , H04J14/08 , H04L7/027 , H04L7/06
摘要： The invention provides a technique for optimizing transmission conditions to achieve large-capacity transmission, and also provides peripheral techniques for the practical implementation of optical multiplexing that makes large-capacity transmission possible. A transmission characteristic is measured in a transmission characteristic measuring section, and control of signal light wavelength in a tunable light source, control of the amount of prechirping, control of the amount of dispersion compensation, and/or control of optical power are performed to achieve the best transmission characteristic. Wavelength dispersion is deliberately introduced by a dispersion compensator, to reduce nonlinear effects. A tunable laser is used to optimize signal light wavelength for each optical amplification repeater section. Peripheral techniques, such as drift compensation, clock extraction, optical signal channel identification, clock phase stabilization, etc., are provided for the implementation of optical multiplexing.
摘要翻译：本发明提供了一种优化传输条件以实现大容量传输的技术，并且还提供了使得大容量传输成为可能的光复用的实际实现的外围技术。在透射特性测量部分中测量传输特性，并且执行可调谐光源中的信号光波长的控制，预激励量的控制，色散补偿量的控制和/或光功率的控制，以实现传输特性最好。波长色散由色散补偿器故意引入，以减少非线性效应。可调激光器用于优化每个光放大中继器部分的信号光波长。提供了诸如漂移补偿，时钟提取，光信号通道识别，时钟相位稳定等的外围技术，用于实施光学多路复用。

10. 发明授权

US08320772B2 Optical transmission apparatus 有权
标题翻译：光传输装置
公开(公告)号：US08320772B2
公开(公告)日：2012-11-27
申请号：US13039876
申请日：2011-03-03
申请人： Hiroki Ooi , George Ishikawa , Daisuke Tanimura , Hirotoshi Kodaka
发明人： Hiroki Ooi , George Ishikawa , Daisuke Tanimura , Hirotoshi Kodaka
IPC分类号： H04B10/04
CPC分类号： H04B10/5051 , H04B10/505 , H04B10/5053
摘要： An optical transmission apparatus according to the present invention comprises: a plurality of optical modulating sections serially connected to each other via optical fibers; driving sections corresponding to the optical modulating sections; delay amount varying sections that provide variable delay amounts for modulating signals to be input to the driving sections, to adjust timing between drive signals to be provided for the optical modulating sections; temperature monitoring sections that monitor the temperature of each of the optical fibers and the like; and a delay amount control section that controls the delay amount in each of the delay amount varying sections based on the monitored temperatures.
摘要翻译：根据本发明的光传输装置包括：通过光纤串联连接的多个光调制部分; 对应于光调制部分的驱动部分; 延迟量变化部分，其提供用于调制要被输入到驱动部分的信号的可变延迟量，以调整要为光调制部分提供的驱动信号之间的定时; 温度监视部分，其监测每个光纤等的温度; 以及延迟量控制部分，其基于所监视的温度来控制每个延迟量变化部分中的延迟量。

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