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：US20120134684A1

公开(公告)日：2012-05-31

申请号：US13317297

申请日：2011-10-14

申请人： Nobukazu Koizumi ,  Kazuhiko Hatae ,  Noriyasu Nakayama ,  Koji Nakamuta ,  Hisao Nakashima ,  Kosuke Komaki

发明人： Nobukazu Koizumi ,  Kazuhiko Hatae ,  Noriyasu Nakayama ,  Koji Nakamuta ,  Hisao Nakashima ,  Kosuke Komaki

IPC分类号： H04B10/06 ,  H04L27/01

CPC分类号： H04B10/613 ,  H04B10/614 ,  H04B10/616 ,  H04L25/03044 ,  H04L27/223

摘要： An adaptive equalizer includes a finite impulse response filter with a predetermined number of taps; and a tap coefficient adaptive controller having a register to hold tap coefficients for the filter, a weighted center calculator to calculate a weighted center of the tap coefficients, and a tap coefficient shifter to shift the tap coefficients based on a calculation result of the weighted center. During an initial training period, the tap coefficient shifter shifts the tap coefficients on a symbol data basis such that a difference between the calculated weighted center of the tap coefficients and a tap center defined by the number of taps is minimized.

摘要翻译： 自适应均衡器包括具有预定数量抽头的有限脉冲响应滤波器; 以及具有用于保持滤波器的抽头系数的寄存器的抽头系数自适应控制器，用于计算抽头系数的加权中心的加权中心计算器，以及基于加权中心的计算结果来移位抽头系数的抽头系数移位器 。 在初始训练期间，抽头系数移位器基于符号数据移动抽头系数，使得所计算的抽头系数的加权中心与由抽头数量定义的抽头中心之间的差最小化。

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：US20100046961A1

公开(公告)日：2010-02-25

申请号：US12543154

申请日：2009-08-18

申请人： Takahito TANIMURA ,  Takeshi Hoshida ,  Hisao Nakashima ,  Shoichiro Oda

发明人： Takahito TANIMURA ,  Takeshi Hoshida ,  Hisao Nakashima ,  Shoichiro Oda

IPC分类号： H04B10/00 ,  H04B10/06 ,  H04B10/04

CPC分类号： H04J14/06 ,  H03F3/08 ,  H04B1/12 ,  H04B10/25133 ,  H04B10/697 ,  H04B2210/252

摘要： A distortion compensator, an optical receiver and a transmission system including an operation selectively compensating for linear waveform distortion exerted on an optical signal via a plurality of distortion compensators and compensating for nonlinear waveform distortion exerted on the optical signal using nonlinear distortion compensators.

摘要翻译： 失真补偿器，光接收器和传输系统，其包括经由多个失真补偿器选择性地补偿施加在光信号上的线性波形失真的操作，并且使用非线性失真补偿器补偿施加在光信号上的非线性波形失真。

公开(公告)号：US07602322B2

公开(公告)日：2009-10-13

申请号：US12068234

申请日：2008-02-04

申请人： Takahito Tanimura ,  Hisao Nakashima ,  Takeshi Hoshida

发明人： Takahito Tanimura ,  Hisao Nakashima ,  Takeshi Hoshida

IPC分类号： H03M1/06

CPC分类号： H04L7/007 ,  H03M1/1255 ,  H04B10/697

摘要： An optical receiving device of the present invention receives optical signals from an optical transmitting device which uses a modulation format wherein an optical intensity waveform of each symbol is return-to-zero (RZ) pulse, and converts the received optical signals into digital signals by a conversion process of an analog to digital (AD) converter. A control-value calculating unit subsequent to the AD converter digitally processes the digital signals, retrieves an absolute value of the digital signals or a value corresponding one-to-one with the absolute value of the digital signals, estimates errors from an appropriate timing of a sampling timing in the AD converter based on the absolute value of the digital signals or the value corresponding one-to-one with the absolute value of the digital signals, and calculates a control value controlling the sampling timing based on the estimated errors. Based on the control value, a phase of a pulse regulating the sampling timing of AD conversion can be compensated.

摘要翻译： 本发明的光接收装置接收来自光发送装置的光信号，该光发送装置采用调制格式，其中每个符号的光强度波形为归零（RZ）脉冲，并将接收到的光信号转换成数字信号 模数转换器（AD）转换器的转换过程。 AD转换器之后的控制值计算单元对数字信号进行数字处理，用数字信号的绝对值检索数字信号的绝对值或与之对应的值，从适当的定时估计误差 基于数字信号的绝对值的AD转换器中的采样定时或与数字信号的绝对值一一对应的值，并且基于估计的误差来计算控制采样定时的控制值。 基于控制值，可以补偿调节AD转换的采样定时的脉冲的相位。

公开(公告)号：US20090226187A1

公开(公告)日：2009-09-10

申请号：US12320069

申请日：2009-01-15

申请人： Takahito Tanimura ,  Takeshi Hoshida ,  Hisao Nakashima ,  Shoichiro Oda

发明人： Takahito Tanimura ,  Takeshi Hoshida ,  Hisao Nakashima ,  Shoichiro Oda

IPC分类号： H04B10/06

CPC分类号： H04B10/677 ,  H04B10/60 ,  H04B10/69

摘要： An optical receiving apparatus compensates degradation of an optical signal received, based a division operation using the intensity of the optical signal. A receiving unit outputs a first electrical signal corresponding to the phase of the optical signal and a second electrical signal corresponding to the intensity of the optical signal. An analog first dividing unit and a second dividing unit divide the first electrical signal by the second electrical signal. A first ADC and a second ADC convert the divided electrical signal to a digital signal. An identifying unit identifies data of the optical signal based on calculation using the digital signal.

摘要翻译： 光接收装置基于使用光信号的强度的分割操作来补偿所接收的光信号的劣化。 接收单元输出对应于光信号的相位的第一电信号和对应于光信号的强度的第二电信号。 模拟第一分割单元和第二分割单元将第一电信号除以第二电信号。 第一ADC和第二ADC将分频电信号转换为数字信号。 识别单元基于使用数字信号的计算来识别光信号的数据。

公开(公告)号：US20090141831A1

公开(公告)日：2009-06-04

申请号：US12292530

申请日：2008-11-20

申请人： Zhenning Tao ,  Lei Ll ,  Hisao Nakashima

发明人： Zhenning Tao ,  Lei Ll ,  Hisao Nakashima

IPC分类号： H04L27/00

CPC分类号： H04B10/69 ,  H04L27/0002 ,  H04L27/2273 ,  H04L2027/003

摘要： The present invention relates to a phase error estimator, a coherent receiver and a phase error estimating method. The phase error estimator estimates a phase error in an inputted base band electric signal and feeds back said phase error; said phase error estimator comprises: a pre-decider, for judging a phase of data in said base band electric signal in accordance with said feedback phase error; a phase error complex value extracting section, for extracting a real part and an imaginary part of the phase error in accordance with the judgment result of said pre-decider; a phase error determining section, for determining said phase error in accordance with the real part and the imaginary part of the phase error extracted by the phase error complex value extracting section; and a time delay feeding back section, for delaying said phase error by N number of symbols and feeding back the delayed phase error to said pre-decider, wherein N is an integer greater than 1.

摘要翻译： 本发明涉及相位误差估计器，相干接收机和相位误差估计方法。 相位误差估计器估计输入基带电信号中的相位误差并反馈所述相位误差; 所述相位误差估计器包括：预判定器，用于根据所述反馈相位误差来判断所述基带电信号中的数据相位; 相位误差复数值提取部分，用于根据所述预选择器的判断结果提取相位误差的实部和虚部; 相位误差确定部分，用于根据由相位误差复数值提取部分提取的相位误差的实部和虚部来确定所述相位误差; 以及时间延迟反馈部分，用于将所述相位误差延迟N个符号，并将延迟的相位误差反馈到所述预决定器，其中N是大于1的整数。

公开(公告)号：US4772925A

公开(公告)日：1988-09-20

申请号：US935171

申请日：1986-11-26

申请人： Tadashi Fukuzawa ,  Ken Yamaguchi ,  Susumu Takahashi ,  Hisao Nakashima ,  Michiharu Nakamura

发明人： Tadashi Fukuzawa ,  Ken Yamaguchi ,  Susumu Takahashi ,  Hisao Nakashima ,  Michiharu Nakamura

IPC分类号： H01L29/80 ,  H01L21/331 ,  H01L21/338 ,  H01L29/10 ,  H01L29/73 ,  H01L29/778 ,  H01L29/812 ,  H01L27/12 ,  H01L29/161 ,  H01L29/205

CPC分类号： H01L29/7783 ,  H01L29/1075

摘要： The semiconductor device of this invention consists at least of a laminate of a semi-insulating or p-type first semiconductor layer having a forbidden band width E.sub.g1, an undoped or p.sup.- -type second semiconductor layer having a forbidden band width E.sub.g2 and an n-type third semiconductor layer having forbidden band width E.sub.g3. The laminate is deposited on a predetermined semiconductor substrate and the forbidden band width has the relation E.sub.g2

摘要翻译： 本发明的半导体器件至少包括具有禁带宽度Eg1的半绝缘或p型第一半导体层的层压体，具有禁带宽度Eg2的未掺杂或p型第二半导体层，以及n 具有禁带宽度Eg3的第三半导体层。 层压体沉积在预定的半导体衬底上，禁带宽度具有关系Eg2

公开(公告)号：US4426702A

公开(公告)日：1984-01-17

申请号：US283791

申请日：1981-07-15

申请人： Shigeo Yamashita ,  Hiroshi Matsuda ,  Uichiroo Kobayashi ,  Masayoshi Kobayashi ,  Hisao Nakashima

发明人： Shigeo Yamashita ,  Hiroshi Matsuda ,  Uichiroo Kobayashi ,  Masayoshi Kobayashi ,  Hisao Nakashima

IPC分类号： H01S5/00 ,  H01S5/227 ,  H01S3/19

CPC分类号： H01S5/227 ,  H01S5/2275

摘要： This invention consists in improvements in a buried-heterostructure laser with buried optical guide, and facilitates the oscillation of the laser in the fundamental mode thereof and also enhances the available percentage of production of the laser. An active layer and an optical guide layer are sandwiched between two cladding layers, to form an optical confinement region. The width of the semiconductor material assembly varies in the direction of the stacked layers, and the narrowest part thereof is located on a side opposite to the optical guide layer with reference to the position of the active layer. The side surface of said semiconductor material assembly parallel to the traveling direction of laser radiation is buried by a burying layer.

摘要翻译： 本发明在于利用掩埋光导的掩埋异质结构激光器的改进，并且促进了激光器在其基本模式下的振荡，并且还提高了激光器的可用生产百分比。 有源层和光导层夹在两个包覆层之间，以形成光限制区域。 半导体材料组件的宽度在堆叠层的方向上变化，并且其最窄部分参照有源层的位置位于与光导层相反的一侧。 与激光辐射的行进方向平行的所述半导体材料组件的侧表面被掩埋层掩埋。