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。

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。

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。

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。

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

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。

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。

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。

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.

公开(公告)号：US07720383B2

公开(公告)日：2010-05-18

申请号：US11651599

申请日：2007-01-10

申请人： Yuichi Akiyama ,  Takafumi Terahara ,  Hiroki Ooi

发明人： Yuichi Akiyama ,  Takafumi Terahara ,  Hiroki Ooi

IPC分类号： H04J14/02

CPC分类号： H04Q11/0005 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0216 ,  H04J14/0217 ,  H04J14/0219 ,  H04Q2011/0035 ,  H04Q2011/006

摘要： An optical transmission apparatus has a first wavelength selective switch (WSS) for route switching, provided with respect to each route, to selectively output signal light from a first input route to second through Nth output routes and to selectively output signal lights from second through Nth input routes to a first output route, for every wavelength, a second WSS for add and drop, to selectively output a signal light from an add port to the first through Nth output routes via the first WSS for every wavelength, and to selectively output the signal lights from the first through Nth input routes to a drop port via the first WSS for every wavelength, and an optical coupler to multiplex each of the signal lights output from the first WSS to the output routes and each of the signal lights output from the second WSS to the output routes, for every route, and to send multiplexed signal light to a first WSS of an other route, and to branch and supply multiplexed signal light input from said other route to the first WSS and the second WSS. The signal lights input and output by the first WSS and the second WSS are transmitted bidirectionally within a single optical transmission line.

摘要翻译： 光传输装置具有用于路由切换的第一波长选择开关（WSS），其针对每条路线，选择性地将来自第一输入路径的信号光输出到第二至第N输出路径，并选择性地从第二至第N输出信号光 输入到第一输出路线的路由，对于每个波长，第二个用于加和减的WSS，用于经由第一WSS为每个波长选择性地输出来自加法端口的信号光到第一至第N输出路由，并选择性地输出 从第一至第N输入的信号灯经由用于每个波长的第一WSS到达分接口，以及光耦合器，用于将从第一WSS输出的每个信号光复用到输出路径，并且每个信号光从 对于每个路由，将第二WSS发送到输出路由，并将多路复用的信号光发送到另一路由的第一WSS，并分支和提供从sa输入的复用信号光 id到第一个WSS和第二个WSS的其他路由。 由第一WSS和第二WSS输入和输出的信号灯在单个光传输线内双向传输。