公开(公告)号：US4503540A

公开(公告)日：1985-03-05

申请号：US368150

申请日：1982-04-14

申请人： Hisao Nakashima ,  Jun-ichi Umeda ,  Takao Kuroda ,  Takashi Kajimura ,  Hiroshi Matsuda

发明人： Hisao Nakashima ,  Jun-ichi Umeda ,  Takao Kuroda ,  Takashi Kajimura ,  Hiroshi Matsuda

IPC分类号： H01S5/00 ,  H01S5/042 ,  H01S5/22 ,  H01S5/227 ,  H01S5/40 ,  H01S3/19

CPC分类号： H01S5/2203 ,  H01S5/4043 ,  H01S5/0424 ,  H01S5/2275

摘要： A phase-locked semiconductor laser device comprising a laminated structure in which a plurality of first semiconductor layers having the substantially same composition are stacked in a manner to be sandwiched between second semiconductor layers having a band gap wider, and a refractive index lower, than those of said first semiconductor layers; a third semiconductor layer which is disposed in contact with at least one of side faces of said laminated structure parallel to a traveling direction of a laser beam, which is not narrower in the band gap and not higher in the refractive index than said first semiconductor layers and which does not have the same conductivity type as, at least, that of said first semiconductor layers; means to inject current into an interface between said first semiconductor layers and said third semiconductor layer disposed on the side face of said laminated structure; and means to act as an optical resonator for the laser beam.

摘要翻译： 一种锁相半导体激光器件，包括层叠结构，其中具有基本上相同组成的多个第一半导体层以夹在带隙较宽的第二半导体层和折射率较低的第二半导体层之间的方式堆叠 的所述第一半导体层; 第三半导体层，其与所述层叠结构的至少一个侧面平行设置成与激光束的行进方向平行，所述激光束的带隙不窄，折射率不高于所述第一半导体层 并且其不具有至少与所述第一半导体层的导电类型相同的导电类型; 用于将电流注入到所述第一半导体层和设置在所述层叠结构的侧面上的所述第三半导体层之间的界面中的装置; 以及用作激光束的光学谐振器的装置。

公开(公告)号：US4303688A

公开(公告)日：1981-12-01

申请号：US100436

申请日：1979-12-05

申请人： Naohiko Shimura ,  Takeo Shinada ,  Mituga Ikoma ,  Hisao Nakashima

发明人： Naohiko Shimura ,  Takeo Shinada ,  Mituga Ikoma ,  Hisao Nakashima

IPC分类号： A23L17/00 ,  A22C25/20 ,  A23L1/325

CPC分类号： A23L17/70

摘要： Fibrous boiled fish paste is produced by adding water to minced meat, mixing both with agitation, molding the mixture into a certain shape, subjecting it to setting, dividing it finely into the form of fibers or flat pieces extending in parallel and then heating the resulting finely divided product without separating each fiber or flat piece individually. The resulting boiled fish paste comprises an inner part coated with an outer surface forming a pellicle united to the inner part. The inner part is divided finely into the form of fibers or flat pieces in parallel to such a degree that each fiber or flat piece separates individually with ease in the mouth upon eating. This boiled fish paste is united in a body in appearance, but it loosens immediately in fiber-like manner in the mouth upon eating and it has an improved mouth feel.

摘要翻译： 通过向切碎的肉中加入水，混合搅拌，将混合物成型为一定形状，使其定型，将其细分成平行延伸的纤维或扁平片的形式，然后加热所得到的纤维煮熟的鱼浆 细分产品不分开每个纤维或平片。 所得到的煮熟的鱼酱包括涂覆有形成与内部结合的防护薄膜的外表面的内部部分。 内部部分被细分成纤维或扁平片的形式，平行于每个纤维或扁平片在进食时容易分开分开。 这种煮熟的鱼酱在外观上结合在一个身体中，但是在进食时立即以纤维状的方式松开，并且口感更好。

公开(公告)号：US08873973B2

公开(公告)日：2014-10-28

申请号：US13446177

申请日：2012-04-13

申请人： Kosuke Komaki ,  Hisao Nakashima

发明人： Kosuke Komaki ,  Hisao Nakashima

IPC分类号： H04B10/06 ,  H04B10/2569 ,  H04B10/2507 ,  H04B10/69

CPC分类号： H04B10/25073 ,  H04B10/2569 ,  H04B10/6971 ,  H04L7/0087 ,  H04L7/0335

摘要： A digital coherent receiver includes a sampling phase detector to detect a phase of a sampled digital signal, and a phase adjustor to adjust the sampling phase of the digital signal based upon the detected phase. The phase detector includes filters to equalize the digital signal with different equalization characteristics; sensitivity monitoring phase detectors, each connected to one of the filters and outputting a phase detection signal representing the phase of the output signal from the associated filter together with a sensitivity monitoring signal representing the sensitivity of the phase detection; sensitivity correction coefficient generators, each generating a sensitivity correction coefficient for correcting the associated phase detection signal using a square sum of the sensitivity monitoring signals; and an adder to add the phase detection signals that have been corrected by the sensitivity correction coefficients, and output a phase signal.

摘要翻译： 数字相干接收机包括：采样相位检测器，用于检测采样数字信号的相位;以及相位调节器，用于根据检测到的相位调整数字信号的采样相位。 相位检测器包括滤波器，以均衡具有不同均衡特性的数字信号; 灵敏度监视相位检测器，每个检测器连接到滤波器之一并输出表示来自相关滤波器的输出信号的相位的相位检测信号以及表示相位检测的灵敏度的灵敏度监视信号; 灵敏度校正系数发生器，每个灵敏度校正系数发生器使用平方和的灵敏度监视信号产生用于校正相关联的相位检测信号的灵敏度校正系数; 以及加法器，将通过灵敏度校正系数校正的相位检测信号相加，并输出相位信号。

公开(公告)号：US08762086B2

公开(公告)日：2014-06-24

申请号：US12232179

申请日：2008-09-11

申请人： Zhenning Tao ,  Jun Tian ,  Huijian Zhang ,  Hisao Nakashima

发明人： Zhenning Tao ,  Jun Tian ,  Huijian Zhang ,  Hisao Nakashima

IPC分类号： G01R13/00

CPC分类号： H04L27/3863 ,  H04L27/3872

摘要： The present invention discloses a phase imbalance monitoring apparatus, an amplitude imbalance monitoring apparatus, as well as an apparatus incorporating the same. The phase imbalance monitoring apparatus is for use in an apparatus in which imbalance between an I branch signal and a Q branch signal in quadrature to each other is required to be monitored, and is characterized in comprising a preprocessing unit, for performing preprocessing on the I branch signal and the Q branch signal to extract essential information relevant to correlation of the signals; and a correlation unit, for performing correlation processing on the extracted essential information to learn of the phase imbalance between the I branch signal and the Q branch signal.

摘要翻译： 本发明公开了一种相位不平衡监视装置，振幅不平衡监视装置，以及包括该不平衡监视装置的装置。 相位不平衡监视装置用于需要监视I分支信号和彼此正交的Q分支信号之间的不平衡的装置，其特征在于包括预处理单元，用于对I进行预处理 分支信号和Q分支信号，以提取与信号相关性相关的基本信息; 以及相关单元，用于对所提取的基本信息执行相关处理，以了解I分支信号和Q分支信号之间的相位不平衡。

公开(公告)号：US08744276B2

公开(公告)日：2014-06-03

申请号：US12408176

申请日：2009-03-20

申请人： Hisao Nakashima ,  Takeshi Hoshida ,  Takahito Tanimura ,  Lei Li ,  Ling Liu

发明人： Hisao Nakashima ,  Takeshi Hoshida ,  Takahito Tanimura ,  Lei Li ,  Ling Liu

IPC分类号： H04B10/00

CPC分类号： H04B10/6165 ,  H04B10/61 ,  H04B10/611 ,  H04L7/0054 ,  H04L27/223

摘要： An optical receiving apparatus includes a combining unit that combines signal light and reference light; a optoelectric converting unit that converts, into electrical signals, two or more optical signals that enable reconstruction of a complex electric field signal of the signal light obtained by the combining unit; and a sampling clock generating unit that generates a sampling clock that has a frequency preset based on a symbol rate of the signal light and is asynchronous with the signal light. The optical receiving apparatus further includes a digital converting unit that samples at the frequency of the sampling clock signal, an electrical signal obtained by the optoelectric converting unit and converts the electrical signal into a digital signal; and a digital signal processing unit that demodulates a received signal based on a complex digital signal obtained from the digital signal obtained by the digital converting unit.

摘要翻译： 光接收装置包括组合信号光和参考光的组合单元; 光电转换单元，其将电信号转换成能够重构由组合单元获得的信号光的复电场信号的两个或更多个光信号; 以及采样时钟产生单元，其生成具有基于信号光的符号率预设的频率并且与信号光异步的采样时钟。 光接收装置还包括数字转换单元，以采样时钟信号的频率采样，由光电转换单元获得的电信号，并将该电信号转换为数字信号; 以及数字信号处理单元，其基于从由数字转换单元获得的数字信号获得的复数数字信号来解调接收信号。

公开(公告)号：US08693898B2

公开(公告)日：2014-04-08

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

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：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：US08571407B2

公开(公告)日：2013-10-29

申请号：US12567245

申请日：2009-09-25

申请人： Lei Li ,  Zhenning Tao ,  Hisao Nakashima

发明人： Lei Li ,  Zhenning Tao ,  Hisao Nakashima

IPC分类号： H04B10/08 ,  H04B17/00

CPC分类号： H04B10/611 ,  H04B10/0795 ,  H04B10/60

摘要： The present invention relates to an optical coherent receiver and an apparatus for and a method of monitoring performance thereof. The apparatus for monitoring performance of the optical coherent receiver makes use of a first signal and a second signal from the optical coherent receiver to monitor performance of the optical coherent receiver, and comprises a first subtracter, for subtracting the second signal from the first signal to obtain a first subtraction result; a squarer, for obtaining a square of the first subtraction result; a delayer, for delaying the first subtraction result; a multiplier, for multiplying the first subtraction result with the delayed first subtraction result; and a second subtracter, for subtracting the result of the multiplier from the result of the squarer.

摘要翻译： 本发明涉及一种光学相干接收机及其监视性能的装置和方法。 用于监视光学相干接收机的性能的装置利用来自光学相干接收机的第一信号和第二信号来监测光学相干接收机的性能，并且包括第一减法器，用于从第一信号减去第二信号 获得第一个减法结果; 平方，用于获得第一减法结果的平方; 延迟器，用于延迟第一减法结果; 乘法器，用于将第一减法结果与延迟的第一减法结果相乘; 和第二减法器，用于从平方器的结果中减去乘数的结果。

公开(公告)号：US08447186B2

公开(公告)日：2013-05-21

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： H04B10/12

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。