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61. 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.

62. 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。

63. 发明申请

US20070264028A1 Optical transmitter 有权
标题翻译：光发射机
公开(公告)号：US20070264028A1
公开(公告)日：2007-11-15
申请号：US11599277
申请日：2006-11-15
申请人： Masahiro Yuki , Kentaro Nakamura , Hiroki Ooi , Masato Nishihara
发明人： Masahiro Yuki , Kentaro Nakamura , Hiroki Ooi , Masato Nishihara
IPC分类号： H04B10/04
CPC分类号： H04B10/5051 , H04B10/5057 , H04B10/50577 , H04B10/58
摘要： In an optical transmitter of the invention, continuous light from a light source is a (CS)RZ-D(Q)PSK modulated by two optical modulators connected in series, and a part of the optical signal output from a post-stage optical modulator is branched by an output monitor section, and the power of a preset frequency component, excluding a frequency component corresponding to a baud rate, included in an electrical spectrum acquired by photoelectrically converting the branched beams is measured. The relative phase of drive signals applied to the optical modulators is then feed-back controlled so that the power becomes a minimum. As a result, a delay shift due to a temperature change or the like between drive signals applied to respective optical modulators, can be reliably compensated.
摘要翻译：在本发明的光发射机中，来自光源的连续光是由串联连接的两个光调制器调制的（CS）RZ-D（Q）PSK，并且从后级光调制器输出的一部分光信号由输出监视部分支，并且测量包括在通过光电转换分支光束获得的电谱中的除波特率对应的频率分量之外的预设频率分量的功率。然后反馈控制施加到光学调制器的驱动信号的相对相位，使得功率变得最小。结果，可以可靠地补偿由于施加到各个光学调制器的驱动信号之间的温度变化等引起的延迟偏移。

64. 发明授权

US07778553B2 Optical transmitter 有权
标题翻译：光发射机
公开(公告)号：US07778553B2
公开(公告)日：2010-08-17
申请号：US11599277
申请日：2006-11-15
申请人： Masahiro Yuki , Kentaro Nakamura , Hiroki Ooi , Masato Nishihara
发明人： Masahiro Yuki , Kentaro Nakamura , Hiroki Ooi , Masato Nishihara
IPC分类号： H04B10/04
CPC分类号： H04B10/5051 , H04B10/5057 , H04B10/50577 , H04B10/58
摘要： In an optical transmitter of the invention, continuous light from a light source is a (CS)RZ-D(Q)PSK modulated by two optical modulators connected in series, and a part of the optical signal output from a post-stage optical modulator is branched by an output monitor section, and the power of a preset frequency component, excluding a frequency component corresponding to a baud rate, included in an electrical spectrum acquired by photoelectrically converting the branched beams is measured. The relative phase of drive signals applied to the optical modulators is then feed-back controlled so that the power becomes a minimum. As a result, a delay shift due to a temperature change or the like between drive signals applied to respective optical modulators, can be reliably compensated.
摘要翻译：在本发明的光发射机中，来自光源的连续光是由串联连接的两个光调制器调制的（CS）RZ-D（Q）PSK，并且从后级光调制器输出的一部分光信号由输出监视部分支，并且测量包括在通过光电转换分支光束获得的电谱中的除波特率对应的频率分量之外的预设频率分量的功率。然后反馈控制施加到光学调制器的驱动信号的相对相位，使得功率变得最小。结果，可以可靠地补偿由于施加到各个光学调制器的驱动信号之间的温度变化等引起的延迟偏移。

65. 发明授权

US07480459B2 Wavelength division multiplexing transmission system 有权
标题翻译：波分复用传输系统
公开(公告)号：US07480459B2
公开(公告)日：2009-01-20
申请号：US10883033
申请日：2004-07-02
申请人： Kentaro Nakamura , Hiroki Ooi , George Ishikawa
发明人： Kentaro Nakamura , Hiroki Ooi , George Ishikawa
IPC分类号： H04B10/00
CPC分类号： H04J14/0227 , H04J14/02 , H04J14/0221
摘要： The present invention provides a wavelength division multiplexing transmission system for separating wavelength division multiplexing signals, where signal lights with different bit rates are wavelength division multiplexed, according to the bit rate, and processing the separated signals individually. The wavelength division multiplexed signals, where a low-speed bit rate signal is disposed in an odd channel group and a high-speed bit rate signal is disposed in an even channel group, are demultiplexed into a low-speed signal group and a high-speed signal group by an unequal bandwidth interleaver. The low-speed signal group is processed (e.g. demultiplexing, dispersion compensation) by an optical device appropriate for the low-speed signals, and the high-speed signal group is processed by an optical device appropriate for the high-speed signals. By this, a relatively expensive and high function optical device can be applied only for the high-speed signal side, so an increase in the device cost can be kept down. Also a device with specifications appropriate for each signal can be used.
摘要翻译：本发明提供一种用于分离波分复用信号的波分复用传输系统，其中根据比特率对具有不同比特率的信号光进行波分复用，并分别处理分离的信号。在奇数信道组中设置低速比特率信号和高速比特率信号的波分复用信号被布置在偶数信道组中，被解复用为低速信号组，速度信号组由不等宽带交织器。通过适合于低速信号的光学装置对低速信号组进行处理（例如解复用，色散补偿），高速信号组由适合于高速信号的光学装置处理。由此，相对昂贵的高功能的光学元件只能用于高速信号侧，因此能够降低器件成本的增加。也可以使用具有适合每个信号的规格的装置。

66. 发明授权

US07146107B2 Method and apparatus for adjusting filter device 有权
标题翻译：调节过滤装置的方法和装置
公开(公告)号：US07146107B2
公开(公告)日：2006-12-05
申请号：US10737881
申请日：2003-12-18
申请人： Kentaro Nakamura , Hiroki Ooi , Tomoo Takahara
发明人： Kentaro Nakamura , Hiroki Ooi , Tomoo Takahara
IPC分类号： H04B10/12
CPC分类号： G02B6/29394 , G02B6/29358 , G02B6/29395 , H04B10/2513 , H04B2210/252
摘要： A tunable dispersion compensator whose passband center wavelength changes when the amount of dispersion compensation is changed is suitably adjusted. The relationship between temperature for keeping the center wavelength constant and the amount of dispersion compensation is stored in advance. After controlling the amount of dispersion compensation to achieve best or optimum transmission quality, the amount of dispersion compensation is converted into temperature in accordance with the stored relationship and, based on that, the temperature is controlled to keep the center wavelength constant.
摘要翻译：适当调整色散补偿量变化时通带中心波长变化的可调谐色散补偿器。预先存储保持中心波长常数的温度与色散补偿量之间的关系。在控制色散补偿量以实现最佳或最佳传输质量之后，色散补偿量根据存储的关系转换为温度，并且基于此，控制温度以保持中心波长恒定。

67. 发明授权

US07613397B2 Wavelength division multiplexing optical transmission system and wavelength dispersion compensation unit 有权
标题翻译：波分复用光传输系统和波长色散补偿单元
公开(公告)号：US07613397B2
公开(公告)日：2009-11-03
申请号：US10914625
申请日：2004-08-10
申请人： Kentaro Nakamura , Hiroki Ooi , George Ishikawa
发明人： Kentaro Nakamura , Hiroki Ooi , George Ishikawa
IPC分类号： H04J14/02 , H04B10/18
CPC分类号： H04B10/2525 , H04J14/02 , H04J14/0213
摘要： In the WDM optical transmission system, a high-slope dispersion compensator compensates wavelength dispersion produced in the optical transmission line. The high-slope dispersion compensator has a dispersion slope characteristic, by which a dispersion slope is substantially compensated over the wavelength bandwidth of the optical transmission line, and also a dispersion compensation characteristic, by which the residual dispersion produced after compensating the dispersion slope using the above dispersion slope characteristic becomes symmetrical with respect to a wavelength in the vicinity of the center of the wavelength bandwidth. To achieve the above compensation, a wavelength-multiplexed signal is divided into wavelength bandwidth groups, and the residual dispersion of the optical transmission line is compensated on a group-by-group basis for the wavelength bandwidth groups.
摘要翻译：在WDM光传输系统中，高斜率色散补偿器补偿光传输线中产生的波长色散。高斜率色散补偿器具有色散斜率特性，通过该色散斜率特性，在光传输线的波长带宽上基本上补偿色散斜率，以及色散补偿特性，通过该色散补偿特性，在使用上述色散斜率特性相对于波长带宽中心附近的波长对称。为了实现上述补偿，将波长多路复用信号划分为波长带宽组，并且针对波长带宽组逐个基础地补偿光传输线的剩余色散。

68. 发明申请

US20050213987A1 Wavelength division multiplexing optical transmission system and wavelength dispersion compensation unit 有权
标题翻译：波分复用光传输系统和波长色散补偿单元
公开(公告)号：US20050213987A1
公开(公告)日：2005-09-29
申请号：US10914625
申请日：2004-08-10
申请人： Kentaro Nakamura , Hiroki Ooi , George Ishikawa
发明人： Kentaro Nakamura , Hiroki Ooi , George Ishikawa
IPC分类号： H04B10/2507 , G02B6/10 , H04B10/2525 , H04J14/00 , H04J14/02 , H04B10/12
CPC分类号： H04B10/2525 , H04J14/02 , H04J14/0213
摘要： In the WDM optical transmission system, a high-slope dispersion compensator compensates wavelength dispersion produced in the optical transmission line. The high-slope dispersion compensator has a dispersion slope characteristic, by which a dispersion slope is substantially compensated over the wavelength bandwidth of the optical transmission line, and also a dispersion compensation characteristic, by which the residual dispersion produced after compensating the dispersion slope using the above dispersion slope characteristic becomes symmetrical with respect to a wavelength in the vicinity of the center of the wavelength bandwidth. To achieve the above compensation, a wavelength-multiplexed signal is divided into wavelength bandwidth groups, and the residual dispersion of the optical transmission line is compensated on a group-by-group basis for the wavelength bandwidth groups.
摘要翻译：在WDM光传输系统中，高斜率色散补偿器补偿光传输线中产生的波长色散。高斜率色散补偿器具有色散斜率特性，通过该色散斜率特性，在光传输线的波长带宽上基本上补偿色散斜率，以及色散补偿特性，通过该色散补偿特性，在使用上述色散斜率特性相对于波长带宽中心附近的波长对称。为了实现上述补偿，将波长多路复用信号划分为波长带宽组，并且针对波长带宽组逐个基础地补偿光传输线的剩余色散。

69. 发明申请

US20050041975A1 Wavelength division multiplexing transmission system 有权
标题翻译：波分复用传输系统
公开(公告)号：US20050041975A1
公开(公告)日：2005-02-24
申请号：US10883033
申请日：2004-07-02
申请人： Kentaro Nakamura , Hiroki Ooi , George Ishikawa
发明人： Kentaro Nakamura , Hiroki Ooi , George Ishikawa
IPC分类号： H04J14/00 , H04B10/2507 , H04B10/2525 , H04B10/2569 , H04B10/29 , H04B10/291 , H04J14/02
CPC分类号： H04J14/0227 , H04J14/02 , H04J14/0221
摘要： The present invention provides a wavelength division multiplexing transmission system for separating wavelength division multiplexing signals, where signal lights with different bit rates are wavelength division multiplexed, according to the bit rate, and processing the separated signals individually. The wavelength division multiplexed signals, where a low-speed bit rate signal is disposed in an odd channel group and a high-speed bit rate signal is disposed in an even channel group, are demultiplexed into a low-speed signal group and a high-speed signal group by an unequal bandwidth interleaver. The low-speed signal group is processed (e.g. demultiplexing, dispersion compensation) by an optical device appropriate for the low-speed signals, and the high-speed signal group is processed by an optical device appropriate for the high-speed signals. By this, a relatively expensive and high function optical device can be applied only for the high-speed signal side, so an increase in the device cost can be kept down. Also a device with specifications appropriate for each signal can be used.
摘要翻译：本发明提供了一种用于分离波分复用信号的波分复用传输系统，其中根据比特率对具有不同比特率的信号光进行波分复用，并分别处理分离的信号。在奇数信道组中设置低速比特率信号和高速比特率信号的波分复用信号被布置在偶数信道组中，被解复用为低速信号组，速度信号组由不等宽带交织器。通过适合于低速信号的光学装置对低速信号组进行处理（例如解复用，色散补偿），高速信号组由适合于高速信号的光学装置处理。由此，相对昂贵的高功能的光学元件只能用于高速信号侧，因此能够降低器件成本的增加。也可以使用具有适合每个信号的规格的装置。

70. 发明授权

US08331779B2 Optical signal processing apparatus 有权
标题翻译：光信号处理装置
公开(公告)号：US08331779B2
公开(公告)日：2012-12-11
申请号：US12659270
申请日：2010-03-02
申请人： Hiroki Ooi , Akira Miura , Tsuyoshi Yamamoto , Naoki Hashimoto
发明人： Hiroki Ooi , Akira Miura , Tsuyoshi Yamamoto , Naoki Hashimoto
IPC分类号： H04J14/00
CPC分类号： G02B6/29313 , G02B6/2931 , G02B6/29383 , G02B6/3512 , G02B6/356 , G02B26/0833 , H04J14/0204 , H04J14/0208 , H04J14/0212 , H04J14/0213
摘要： An OADM in a wavelength division multiplexing transmission system includes a wavelength selection switch that selects a predetermined wavelength from a multiple optical signal obtained by multiplexing a phase modulated signal and an intensity modulated signal and outputs the selected wavelength signal to a predetermined output port. The wavelength selection switch has a different delay for each wavelength of the multiple optical signal. For example, the wavelength selection switch includes a mirror array. Optical paths from the surfaces of mirrors arranged on the mirror array to the diffraction grating are different in the case of adjacent mirrors.
摘要翻译：波分复用传输系统中的OADM包括波长选择开关，其从通过复用相位调制信号和强度调制信号获得的多个光信号中选择预定波长，并将所选择的波长信号输出到预定输出端口。波长选择开关对于多个光信号的每个波长具有不同的延迟。例如，波长选择开关包括反射镜阵列。在相邻反射镜的情况下，从反射镜阵列上布置在反射镜阵列上的反射镜的表面的光路不同。

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