公开(公告)号：US07720392B2

公开(公告)日：2010-05-18

申请号：US11274824

申请日：2005-11-16

申请人： Hisao Nakashima ,  Takeshi Hoshida

发明人： Hisao Nakashima ,  Takeshi Hoshida

IPC分类号： H04B10/04 ,  H04B10/00

CPC分类号： G02F1/2255 ,  G02F2001/212 ,  H04B10/505 ,  H04B10/5053 ,  H04B10/50572 ,  H04B10/5561 ,  H04L27/2075 ,  H04L27/2096

摘要： The present invention is directed toward a method for setting a driving voltage of a differential quadrature phase-shift modulator, this method making signal quality superior in response to an individual difference in extinction ratio due to variations in manufacture of a device. To this end, signal quality of differential quadrature phase-shift modulated light output from a differential quadrature phase-shift modulator is acquired. An average amplitude of a first or second driving voltage signal is adjusted according to the signal quality of the thus-acquired differential quadrature phase-shift modulated light.

摘要翻译： 本发明涉及一种用于设定差分正交相移调制器的驱动电压的方法，该方法使得信号质量响应于由于器件的制造变化而导致的消光比的个体差别而优异。 为此，获取从差分正交相移调制器输出的差分正交相移调制光的信号质量。 根据这样获取的差分正交相移调制光的信号质量来调整第一或第二驱动电压信号的平均振幅。

公开(公告)号：US07630650B2

公开(公告)日：2009-12-08

申请号：US11655186

申请日：2007-01-19

申请人： Takeshi Hoshida ,  Hisao Nakashima

发明人： Takeshi Hoshida ,  Hisao Nakashima

IPC分类号： H04B10/12

CPC分类号： H04B10/6971 ,  H04B10/677

摘要： A multi-level modulation receiving device for adaptively compensating for chromatic dispersion and polarization mode dispersion with high precision. Each equalizing filter has at least one variable parameter as a weight therefor and equalizes the waveform of a corresponding channel signal in accordance with an averaged variable parameter value. A signal quality monitor monitors the signal quality of the filter output signal, and a variable parameter value calculator calculates a variable parameter value to be set as the variable parameter, in accordance with the signal quality. A variable parameter averaging unit averages the variable parameter values calculated for respective channels, to generate an averaged variable parameter value, and sends the averaged variable parameter value to the equalizing filters such that the same weight is set in the equalizing filters associated with the n channels.

摘要翻译： 一种用于以高精度自适应地补偿色散和偏振模色散的多电平调制接收装置。 每个均衡滤波器具有至少一个可变参数作为其权重，并根据平均的可变参数值对相应的信道信号的波形进行均衡。 信号质量监视器监视滤波器输出信号的信号质量，并且可变参数值计算器根据信号质量计算要设置为可变参数的可变参数值。 可变参数平均单元对为各个通道计算的可变参数值进行平均，以生成平均的可变参数值，并将平均的可变参数值发送到均衡滤波器，使得在与n个通道相关联的均衡滤波器中设置相同的权重 。

公开(公告)号：US07382979B2

公开(公告)日：2008-06-03

申请号：US11316961

申请日：2005-12-27

申请人： Yuichi Akiyama ,  Takafumi Terahara ,  Takeshi Hoshida ,  Hisao Nakashima

发明人： Yuichi Akiyama ,  Takafumi Terahara ,  Takeshi Hoshida ,  Hisao Nakashima

IPC分类号： H04B10/08 ,  H04B10/12 ,  H04B10/00 ,  H04J14/02

CPC分类号： H04B10/2513

摘要： The present invention discloses a design method of wavelength dispersion compensation of a desired link that is extracted from an optical network, the link including two or more spans, and two or more nodes (N1, N4) that are equipped with an add/drop function, as shown in FIG. 2. All residual dispersion ranges of paths that reach corresponding nodes are adjusted to fall within predetermined tolerable residual dispersion ranges that are set up for all the paths of the link by adjusting wavelength dispersion compensators provided to each of the spans.

摘要翻译： 本发明公开了一种从光网络提取的期望链路的波长色散补偿的设计方法，包括两个或多个跨度的链路，以及两个或更多个节点（N 1，N 4），其配备有添加/ drop功能，如图3所示。 2。 通过调整提供给每个跨度的波长色散补偿器，到达对应节点的路径的所有残余色散范围被调整到落在通过链路的所有路径设置的预定容许残余色散范围内。

公开(公告)号：US08630552B2

公开(公告)日：2014-01-14

申请号：US13083723

申请日：2011-04-11

申请人： Hisao Nakashima ,  Takeshi Hoshida ,  Kosuke Komaki

发明人： Hisao Nakashima ,  Takeshi Hoshida ,  Kosuke Komaki

IPC分类号： H04B10/06

摘要： A digital coherent receiver includes a front end, an A/D convertor, and a processor. The front end converts a light signal into an electric signal by using a signal light and a local oscillator light. The A/D convertor converts the electric signal of the front end into a digital signal. The processor calculates a spectrum gravity center of the digital signal converted by the A/D convertor, estimates a frequency offset of the digital signal based on the calculated spectrum gravity center, and reduces the frequency offset of the digital signal based on the estimated frequency offset.

公开(公告)号：US08625996B2

公开(公告)日：2014-01-07

申请号：US11939646

申请日：2007-11-14

申请人： Toshiki Tanaka ,  Hisao Nakashima ,  Takeshi Hoshida ,  Toru Katagiri ,  Hiroki Ooi ,  Akira Miura

发明人： Toshiki Tanaka ,  Hisao Nakashima ,  Takeshi Hoshida ,  Toru Katagiri ,  Hiroki Ooi ,  Akira Miura

IPC分类号： H04B10/00

CPC分类号： H04J14/0286 ,  H04B10/2557 ,  H04B10/516 ,  H04J14/0204 ,  H04J14/0212 ,  H04J14/0217 ,  H04J14/0219 ,  H04J14/022 ,  H04J14/0221 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0283

摘要： An optical transmitter is provided for transmitting a wavelength multiplexed signal comprising an intensity modulation optical signal and a phase modulation optical signal through a transmission line. The optical transmitter includes a bit time difference given signal generator for generating at least two optical signals having a bit time difference therebetween, from the wavelength multiplexed signal. The optical transmitter further includes a wavelength multiplexed signal output unit to which at least two optical signals are input from the bit time difference given signal generator, and which generates and outputs a wavelength multiplexed signal in which the bit time difference was given between the phase modulation optical signal and the phase modulation optical signal.

摘要翻译： 提供了一种用于通过传输线传输包括强度调制光信号和相位调制光信号的波分复用信号的光发射机。 所述光发射机包括位时间差给定信号发生器，用于从所述波长复用信号产生具有位时间差的至少两个光信号。 光发射机还包括波长多路复用信号输出单元，至少两个光信号从比特时间差给定信号发生器输入到该波长多路复用信号输出单元，并且其生成并输出波长多路复用信号，其中在强度调制 光信号和相位调制光信号。

公开(公告)号：US08351797B2

公开(公告)日：2013-01-08

申请号：US12656363

申请日：2010-01-27

申请人： Hisao Nakashima ,  Takeshi Hoshida

发明人： Hisao Nakashima ,  Takeshi Hoshida

IPC分类号： H04B10/00

CPC分类号： H04B10/299 ,  H04B2210/258

摘要： A repeater is disclosed that transmits an optical signal using wave division multiplexing. The repeater includes a demultiplexing unit that separates plural channels contained in the optical signal, an adjusting unit that adjusts at least optical power of each of the channels according to a control signal, a multiplexing unit that outputs a multiple wavelength signal in which the channels are multiplexed, and a monitoring unit that determines a modulation scheme and a bit rate of the optical signal for each of the channels so as to generate the control signal.

摘要翻译： 公开了使用波分复用来发送光信号的中继器。 中继器包括：分离单元，分离包含在光信号中的多个信道;调节单元，用于根据控制信号调整至少每个信道的光功率;多路复用单元，其输出信道为 以及监测单元，其确定每个信道的光信号的调制方案和比特率，以便产生控制信号。

公开(公告)号：US08145069B2

公开(公告)日：2012-03-27

申请号：US11740954

申请日：2007-04-27

申请人： Toshiki Tanaka ,  Takeshi Hoshida ,  Hisao Nakashima ,  Yuichi Akiyama

发明人： Toshiki Tanaka ,  Takeshi Hoshida ,  Hisao Nakashima ,  Yuichi Akiyama

IPC分类号： H04B10/04

CPC分类号： H04B10/50572 ,  H04B10/505 ,  H04B10/50575 ,  H04B10/564

摘要： A signal Data1 and Data2 are output from a DQPSK signal source. The output signal is input to the modulator drivers 1 and 2 of the differential output. A drive signal is applied from the drivers 1 and 2 to a modulator, and modulated light is output. An optical coupler 20 branches modulator output, and a power monitor 21 detects the power of the branched light. A detection result is transmitted to an amplitude control unit 22. The amplitude control unit 22 adjusts the amplitude of the drivers 1 and 2 such that the detection result of the power monitor 21 can be the maximum.

摘要翻译： 从DQPSK信号源输出信号Data1和Data2。 输出信号被输入到差分输出的调制器驱动器1和2。 将驱动信号从驱动器1和2施加到调制器，并输出调制光。 光耦合器20分支调制器输出，功率监视器21检测分支光的功率。 检测结果被发送到幅度控制单元22.振幅控制单元22调节驱动器1和2的振幅，使得功率监视器21的检测结果可以是最大的。

公开(公告)号：US20100135663A1

公开(公告)日：2010-06-03

申请号：US12656363

申请日：2010-01-27

申请人： Hisao Nakashima ,  Takeshi Hoshida

发明人： Hisao Nakashima ,  Takeshi Hoshida

IPC分类号： H04B10/00 ,  H04J14/02

CPC分类号： H04B10/299 ,  H04B2210/258

摘要： A repeater is disclosed that transmits an optical signal using wave division multiplexing. The repeater includes a demultiplexing unit that separates plural channels contained in the optical signal, an adjusting unit that adjusts at least optical power of each of the channels according to a control signal, a multiplexing unit that outputs a multiple wavelength signal in which the channels are multiplexed, and a monitoring unit that determines a modulation scheme and a bit rate of the optical signal for each of the channels so as to generate the control signal.

公开(公告)号：US20100002810A1

公开(公告)日：2010-01-07

申请号：US12495834

申请日：2009-07-01

申请人： Lei LI ,  Zhenning Tao ,  Hisao Nakashima

发明人： Lei LI ,  Zhenning Tao ,  Hisao Nakashima

IPC分类号： H04L27/227

CPC分类号： H04B10/611 ,  H04B10/60 ,  H04B10/6165 ,  H04B10/697

摘要： The invention provides an average length adaptive optimization method and apparatus. An adaptive optimization method for the average length used for phase recovery comprising: a residual phase difference calculation step, for receiving a current phase of a digital symbol obtained by phase recovery and a data modulation phase of the digital symbol obtained by data recovery, and calculating a residual phase difference of the digital symbol, which is a difference between the current phase and the data modulation phase of the digital symbol; a residual phase difference auto-correlation value calculation step, for calculating an auto-correlation value of the residual phase difference with displacement m, wherein −10≦m≦10, and m is an integral; an optimization step, for optimizing the average length based on the residual phase difference auto-correlation value.

摘要翻译： 本发明提供一种平均长度自适应优化方法和装置。 一种用于相位恢复的平均长度的自适应优化方法，包括：残差相位差计算步骤，用于接收通过相位恢复获得的数字符号的当前相位和通过数据恢复获得的数字符号的数据调制阶段，以及计算 数字符号的剩余相位差，其是数字符号的当前相位和数据调制相位之间的差; 剩余相位差自相关值计算步骤，用于计算残留相位差与位移m的自相关值，其中-10 <= m <= 10，m是积分; 优化步骤，根据残差相位自相关值优化平均长度。

公开(公告)号：US20090129787A1

公开(公告)日：2009-05-21

申请号：US12289072

申请日：2008-10-20

申请人： Lei Li ,  Zhenning Tao ,  Hisao Nakashima

发明人： Lei Li ,  Zhenning Tao ,  Hisao Nakashima

IPC分类号： H04B10/06

CPC分类号： H04B10/6164 ,  H04B10/61 ,  H04B10/613 ,  H04B10/6161 ,  H04B10/6162 ,  H04B10/6165 ,  H04B10/63

摘要： The present invention discloses an optical coherent receiver, and a frequency offset estimating apparatus and a frequency offset estimating method for use in the optical coherent receiver. The optical coherent receiver includes a front end processing section for changing an optical signal into a base band digital electric signal. The frequency offset estimating apparatus comprises a phase offset calculating section, for calculating a phase offset in said base band digital electric signal; a phase offset change calculating section, for calculating a change of said phase offset, namely a phase offset change, in accordance with the phase offset calculated by said phase offset calculating section; an ambiguity deciding section, for deciding whether there is ambiguity in said phase offset change calculated by said phase offset change calculating section, and outputting the phase offset change having no ambiguity; and a loop filtering section, for acquiring a weighted average of the phase offset change outputted by said ambiguity deciding section.

摘要翻译： 本发明公开了一种光学相干接收机，以及用于光学相干接收机中的频率偏移估计装置和频率偏移估计方法。 光相干接收机包括用于将光信号改变为基带数字电信号的前端处理部分。 所述频偏估计装置包括：相位偏移计算部，用于计算所述基带数字电信号中的相位偏移; 相位偏移改变计算部分，用于根据由所述相位偏移计算部分计算的相位偏移来计算所述相位偏移的变化，即相位偏移改变; 模糊判定部，用于判定由所述相位偏移变化计算部计算出的所述相位偏移变化是否存在歧义，并输出没有模糊性的相位偏移变化; 以及环路滤波部分，用于获取由所述模糊判定部分输出的相位偏移改变的加权平均值。