公开(公告)号：US08213798B2

公开(公告)日：2012-07-03

申请号：US12688137

申请日：2010-01-15

申请人： Hiroki Ooi ,  Hiroshi Onaka ,  George Ishikawa

发明人： Hiroki Ooi ,  Hiroshi Onaka ,  George Ishikawa

IPC分类号： H04J14/02

CPC分类号： H04B10/2557 ,  H04J14/02

摘要： An optical transmission apparatus for suppressing deterioration of transmission quality due to XPM in a wavelength division multiplexing optical communication system in which an intensity modulation optical signal and a phase modulation optical signal exist in a mixed form. The apparatus has an intensity inversion signal light output section which outputs light having an intensity pattern obtained by inverting intensity changes of the intensity modulation optical signal near a wavelength of the intensity modulation optical signal in arrangement on wavelength axis of optical wavelengths that can be multiplexed as a wavelength division multiplexed signal as intensity inversion signal light, and a wavelength division multiplexed optical signal output unit which wavelength-division-multiplexes the intensity modulation optical signal, the phase modulation optical signal and light from the intensity inversion signal light output section and outputs a wavelength division multiplexed optical signal.

摘要翻译： 一种光传输装置，用于在混合形式存在强度调制光信号和相位调制光信号的波分复用光通信系统中抑制由XPM导致的传输质量的恶化。 该装置具有强度反转信号光输出部，其输出具有通过将强度调制光信号的波长附近的强度调制光信号的强度变化反转的强度图形输出的光配置在可以多路复用的光波长的波长轴上 波分多路复用信号作为强度反转信号光，以及波分复用光信号输出单元，其对强度调制光信号，相位调制光信号和强度反转信号光输出部分的光进行波分复用，并输出 波分复用光信号。

公开(公告)号：US20100221013A1

公开(公告)日：2010-09-02

申请号：US12688137

申请日：2010-01-15

申请人： Hiroki OOI ,  Hiroshi Onaka ,  George Ishikawa

发明人： Hiroki OOI ,  Hiroshi Onaka ,  George Ishikawa

IPC分类号： H04J14/02 ,  H04B10/02 ,  H04B10/18

CPC分类号： H04B10/2557 ,  H04J14/02

摘要： An optical transmission apparatus for suppressing deterioration of transmission quality due to XPM in a wavelength division multiplexing optical communication system in which an intensity modulation optical signal and a phase modulation optical signal exist in a mixed form. The apparatus has an intensity inversion signal light output section which outputs light having an intensity pattern obtained by inverting intensity changes of the intensity modulation optical signal near a wavelength of the intensity modulation optical signal in arrangement on wavelength axis of optical wavelengths that can be multiplexed as a wavelength division multiplexed signal as intensity inversion signal light, and a wavelength division multiplexed optical signal output unit which wavelength-division-multiplexes the intensity modulation optical signal, the phase modulation optical signal and light from the intensity inversion signal light output section and outputs a wavelength division multiplexed optical signal.

摘要翻译： 一种光传输装置，用于在混合形式存在强度调制光信号和相位调制光信号的波分复用光通信系统中抑制由XPM导致的传输质量的恶化。 该装置具有强度反转信号光输出部，其输出具有通过将强度调制光信号的波长附近的强度调制光信号的强度变化反转的强度图形输出的光配置在可以多路复用的光波长的波长轴上 波分多路复用信号作为强度反转信号光，以及波分复用光信号输出单元，其对强度调制光信号，相位调制光信号和强度反转信号光输出部分的光进行波分复用，并输出 波分复用光信号。

公开(公告)号：US07848659B2

公开(公告)日：2010-12-07

申请号：US11298892

申请日：2005-12-12

申请人： Akira Miura ,  Kentaro Nakamura ,  Hiroshi Onaka ,  Yuichi Akiyama ,  Hiroki Ooi ,  Jens Rasmussen ,  Takeshi Hoshida

发明人： Akira Miura ,  Kentaro Nakamura ,  Hiroshi Onaka ,  Yuichi Akiyama ,  Hiroki Ooi ,  Jens Rasmussen ,  Takeshi Hoshida

IPC分类号： H04B10/04

CPC分类号： G02F1/0123 ,  G02F1/2255 ,  H04B10/505 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/50575 ,  H04B10/50577 ,  H04B10/50597 ,  H04B10/58

摘要： A data modulator unit generates a DQPSK optical signal in accordance with a data signal. A phase shift unit provides a phase difference of π/2 between a pair of arms. A photodetector converts an output signal of the data modulator unit into an electrical signal. A filter is a low-pass filter with a cut-off frequency lower than a symbol frequency, and filters an output signal of the photodetector. A monitor unit detects power of an output signal of the filter. A phase difference control unit adjusts the amount of phase shift in the phase shift unit so as to minimize power of an output signal of the filter.

摘要翻译： 数据调制器单元根据数据信号产生DQPSK光信号。 相移单元在一对臂之间提供＆pgr / / 2的相位差。 光电检测器将数据调制器单元的输出信号转换为电信号。 滤波器是具有低于符号频率的截止频率的低通滤波器，并对光电检测器的输出信号进行滤波。 监视器单元检测滤波器的输出信号的功率。 相位差控制单元调整相移单元中的相移量，以使滤波器的输出信号的功率最小化。

公开(公告)号：US07769299B2

公开(公告)日：2010-08-03

申请号：US11475046

申请日：2006-06-27

申请人： Hiroki Ooi ,  Akira Miura ,  Hiroshi Onaka

发明人： Hiroki Ooi ,  Akira Miura ,  Hiroshi Onaka

IPC分类号： H04B10/12 ,  H04B10/00

CPC分类号： G01M11/333 ,  G01M11/338 ,  H04B10/07951 ,  H04B10/2513

摘要： A chromatic dispersion monitoring apparatus according to the present invention comprises: a photodetector which photo-electrically converts an optical signal; a low-pass filter which limits a frequency bandwidth of the photo-electrically converted electrical signal to be within a range set according to a modulation format of the optical signal and a bit rate thereof; a DC elimination circuit which eliminates a direct current component of the bandwidth limited electrical signal; and a power detector which detects the power of the bandwidth limited electrical signal to detect the residual dispersion of the optical signal. As a result, it becomes possible to easily realize the chromatic dispersion monitoring apparatus of low cost, which is also capable to be arranged on an in-line.

摘要翻译： 根据本发明的色散监视装置包括：光电转换光信号的光电检测器; 将光电转换电信号的频带宽度限制在根据光信号的调制格式及其比特率设定的范围内的低通滤波器; DC消除电路，其消除带宽受限电信号的直流分量; 以及功率检测器，其检测带宽受限电信号的功率，以检测光信号的残余色散。 结果，可以容易地实现也能够排列在一起的低成本的色散监视装置。

公开(公告)号：US07869715B2

公开(公告)日：2011-01-11

申请号：US11785896

申请日：2007-04-20

申请人： Hiroki Ooi ,  Hiroshi Onaka ,  Takeshi Hoshida

发明人： Hiroki Ooi ,  Hiroshi Onaka ,  Takeshi Hoshida

IPC分类号： H04B10/12

CPC分类号： H04B10/25133

摘要： A variable dispersion compensating unit compensates an optical signal, and changes the compensation amount according to a control signal that has a given frequency. After demodulation of the compensated optical signal, error conditions of the signal are monitored and an error signal is output. A band pass filter filters the error signal for a component having a frequency equal to or less than the given frequency. Based on the component and on the control signal, a synchronous detecting circuit generates a compensation amount modification signal. The compensation amount modification signal is superposed on the control signal.

摘要翻译： 可变色散补偿单元补偿光信号，并根据具有给定频率的控制信号改变补偿量。 在对补偿的光信号进行解调之后，监视信号的误差状况并输出误差信号。 带通滤波器滤波具有等于或小于给定频率的频率的分量的误差信号。 基于分量和控制信号，同步检测电路产生补偿量修正信号。 补偿量修正信号叠加在控制信号上。

公开(公告)号：US20080056710A1

公开(公告)日：2008-03-06

申请号：US11785896

申请日：2007-04-20

申请人： Hiroki Ooi ,  Hiroshi Onaka ,  Takeshi Hoshida

发明人： Hiroki Ooi ,  Hiroshi Onaka ,  Takeshi Hoshida

IPC分类号： H04B17/00

CPC分类号： H04B10/25133

摘要： A variable dispersion compensating unit compensates an optical signal, and changes the compensation amount according to a control signal that has a given frequency. After demodulation of the compensated optical signal, error conditions of the signal are monitored and an error signal is output. A band pass filter filters the error signal for a component having a frequency equal to or less than the given frequency. Based on the component and on the control signal, a synchronous detecting circuit generates a compensation amount modification signal. The compensation amount modification signal is superposed on the control signal.

摘要翻译： 可变色散补偿单元补偿光信号，并根据具有给定频率的控制信号改变补偿量。 在对补偿的光信号进行解调之后，监视信号的误差状况并输出误差信号。 带通滤波器滤波具有等于或小于给定频率的频率的分量的误差信号。 基于分量和控制信号，同步检测电路产生补偿量修正信号。 补偿量修正信号叠加在控制信号上。

公开(公告)号：US20070177876A1

公开(公告)日：2007-08-02

申请号：US11475046

申请日：2006-06-27

申请人： Hiroki Ooi ,  Akira Miura ,  Hiroshi Onaka

发明人： Hiroki Ooi ,  Akira Miura ,  Hiroshi Onaka

IPC分类号： H04B10/12

CPC分类号： G01M11/333 ,  G01M11/338 ,  H04B10/07951 ,  H04B10/2513

摘要： A chromatic dispersion monitoring apparatus according to the present invention comprises: a photodetector which photo-electrically converts an optical signal; a low-pass filter which limits a frequency bandwidth of the photo-electrically converted electrical signal to be within a range set according to a modulation format of the optical signal and a bit rate thereof; a DC elimination circuit which eliminates a direct current component of the bandwidth limited electrical signal; and a power detector which detects the power of the bandwidth limited electrical signal to detect the residual dispersion of the optical signal. As a result, it becomes possible to easily realize the chromatic dispersion monitoring apparatus of low cost, which is also capable to be arranged on an in-line.

摘要翻译： 根据本发明的色散监视装置包括：光电转换光信号的光电检测器; 将光电转换电信号的频带宽度限制在根据光信号的调制格式及其比特率设定的范围内的低通滤波器; DC消除电路，其消除带宽受限电信号的直流分量; 以及功率检测器，其检测带宽受限电信号的功率，以检测光信号的残余色散。 结果，可以容易地实现也能够排列在一起的低成本的色散监视装置。

公开(公告)号：US20070065161A1

公开(公告)日：2007-03-22

申请号：US11298892

申请日：2005-12-12

申请人： Akira Miura ,  Kentaro Nakamura ,  Hiroshi Onaka ,  Yuichi Akiyama ,  Hiroki Ooi ,  Jens Rasmussen ,  Takeshi Hoshida

发明人： Akira Miura ,  Kentaro Nakamura ,  Hiroshi Onaka ,  Yuichi Akiyama ,  Hiroki Ooi ,  Jens Rasmussen ,  Takeshi Hoshida

IPC分类号： H04B10/04

CPC分类号： G02F1/0123 ,  G02F1/2255 ,  H04B10/505 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/50575 ,  H04B10/50577 ,  H04B10/50597 ,  H04B10/58

摘要： A data modulator unit generates a DQPSK optical signal in accordance with a data signal. A phase shift unit provides a phase difference of π/2 between a pair of arms. A photodetector converts an output signal of the data modulator unit into an electrical signal. A filter is a low-pass filter with a cut-off frequency lower than a symbol frequency, and filters an output signal of the photodetector. A monitor unit detects power of an output signal of the filter. A phase difference control unit adjusts the amount of phase shift in the phase shift unit so as to minimize power of an output signal of the filter.

摘要翻译： 数据调制器单元根据数据信号产生DQPSK光信号。 相移单元提供一对臂之间的π/ 2的相位差。 光电检测器将数据调制器单元的输出信号转换为电信号。 滤波器是具有低于符号频率的截止频率的低通滤波器，并对光电检测器的输出信号进行滤波。 监视器单元检测滤波器的输出信号的功率。 相位差控制单元调整相移单元中的相移量，以使滤波器的输出信号的功率最小化。

公开(公告)号：US07860408B2

公开(公告)日：2010-12-28

申请号：US11651591

申请日：2007-01-10

申请人： Akihiko Isomura ,  Jens Rasmussen ,  Takafumi Terahara ,  Kentaro Nakamura ,  Takeshi Hoshida ,  George Ishikawa ,  Hiroshi Onaka ,  Morio Wada ,  Hiroyuki Matsuura ,  Akira Miura ,  Yasuyuki Suzuki ,  Hideaki Arai ,  Satoshi Takasugi

发明人： Akihiko Isomura ,  Jens Rasmussen ,  Takafumi Terahara ,  Kentaro Nakamura ,  Takeshi Hoshida ,  George Ishikawa ,  Hiroshi Onaka ,  Morio Wada ,  Hiroyuki Matsuura ,  Akira Miura ,  Yasuyuki Suzuki ,  Hideaki Arai ,  Satoshi Takasugi

IPC分类号： H04B10/06

CPC分类号： G02F1/225 ,  G02F2203/21 ,  H04L1/0047 ,  H04L27/223

摘要： An interferometer for demodulating a differential M-phase shift keying signal includes a PLC type interferometer main body, a heating portion that heats the PLC type interferometer main body, and an intermediate member having a higher stiffness than that of the PLC type interferometer main body, for bonding the PLC type interferometer main body and the heating portion with each other while being sandwiched therebetween. A linear expansion coefficient difference between the PLC type interferometer main body and the intermediate member is equal to or smaller than 4.5×10−6/° C., and a thermal conductivity difference between the PLC type interferometer main body and the intermediate member is equal to or larger than 10 W/mK. A phase of an optical signal flowing through the interferometer is adjusted by using the heating portion and a second heating portion.

摘要翻译： 用于解调差分M相移键控信号的干涉仪包括PLC型干涉仪主体，加热PLC型干涉仪主体的加热部分和具有比PLC型干涉仪主体更高刚度的中间部件， 用于将PLC型干涉仪主体和加热部分夹在两者之间彼此粘合。 PLC型干涉仪主体与中间构件之间的线膨胀系数差等于或小于4.5×10-6 /℃，PLC型干涉仪主体与中间构件之间的热导率差相等 至10W / mK以上。 通过使用加热部和第二加热部来调节流过干涉仪的光信号的相位。

公开(公告)号：US06252688B1

公开(公告)日：2001-06-26

申请号：US09438147

申请日：1999-11-10

申请人： George Ishikawa ,  Hideyuki Miyata ,  Hiroshi Onaka ,  Motoyoshi Sekiya ,  Kazue Okazaki

发明人： George Ishikawa ,  Hideyuki Miyata ,  Hiroshi Onaka ,  Motoyoshi Sekiya ,  Kazue Okazaki

IPC分类号： H04J1402

CPC分类号： G02B6/29377 ,  G02B6/4215 ,  H04B10/25133 ,  H04B10/2525 ,  H04B10/25253 ,  H04B10/255 ,  H04B10/2563 ,  H04B2210/252 ,  H04B2210/254 ,  H04B2210/258 ,  H04J14/02 ,  H04J14/0224

摘要： The invention provides an optical wavelength multiplex transmission method wherein a band in the proximity of a zero dispersion wavelength of an optical fiber is used and optical signals are disposed at efficient channel spacings taking an influence of the band, the wavelength dispersion and the four wave mixing into consideration to realize an optical communication system of an increased capacity which is not influenced by crosstalk by FWM. When optical signals of a plurality of channels having different wavelengths are to be multiplexed and transmitted using an optical fiber, a four wave mixing suppressing guard band of a predetermined bandwidth including the zero-dispersion wavelength &lgr;0 of the optical fiber is set, and signal light waves of the plurality of channels to be multiplexed are arranged on one of the shorter wavelength side and the longer wavelength side outside the guard band.