公开(公告)号：US08526828B2

公开(公告)日：2013-09-03

申请号：US13267909

申请日：2011-10-07

申请人： Hisao Nakashima ,  Takeshi Hoshida

发明人： Hisao Nakashima ,  Takeshi Hoshida

IPC分类号： H04B10/04

CPC分类号： H04B10/505 ,  H04B10/572

摘要： The optical transmitter includes a light source; a signal processor; an optical modulator that modulates output light from the light source in accordance with a transmitting signal subjected to digital signal processing in the signal processor and outputs the modulated light as a light signal to a transmission path; and a control circuit that controls a carrier-wave frequency of the light signal output from the optical modulator, the signal processor including a mapping circuit that maps the transmitting signal to electric-field information according to a modulating scheme, and a phase rotating circuit that provides a phase rotation having a constant cycle to an electric-field phase of the electric-field information to which the mapping circuit maps the transmitting signal, the control circuit controlling the cycle of the phase rotation that the phase rotating circuit provides and thereby controlling the carrier-wave frequency of the light signal output from the optical modulator.

摘要翻译： 光发射机包括光源; 一个信号处理器; 光调制器，其根据在信号处理器中进行数字信号处理的发送信号调制来自光源的输出光，并将调制光作为光信号输出到传输路径; 以及控制电路，其控制从所述光调制器输出的光信号的载波频率，所述信号处理器包括映射电路，所述映射电路根据调制方案将所述发送信号映射到电场信息;以及相位旋转电路， 向映射电路映射发送信号的电场信息的电场相位提供恒定周期的相位旋转，控制电路控制相位旋转电路提供的相位旋转的周期，从而控制 从光调制器输出的光信号的载波频率。

公开(公告)号：US08331805B2

公开(公告)日：2012-12-11

申请号：US12776514

申请日：2010-05-10

申请人： Hisao Nakashima ,  Takeshi Hoshida

发明人： Hisao Nakashima ,  Takeshi Hoshida

IPC分类号： H04B10/06

CPC分类号： H04B10/697 ,  H04B10/61 ,  H04B10/611 ,  H04B10/613 ,  H04B10/6165

摘要： A digital coherent optical receiver provided with a 90-degree optical hybrid circuit for detecting an in-phase signal and a quadrature signal of an input optical signal, includes first through fourth circuits. The first circuit calculates a square of a sum of the in-phase signal and the quadrature signal. The second circuit subtracts a squared value of the in-phase signal and a squared value of the quadrature signal from the calculation result of the first circuit. The third circuit detects a phase error of the 90-degree optical hybrid circuit based on the calculation result of the second circuit. The fourth circuit corrects at least one of the in-phase signal and the quadrature signal according to the phase error detected by the third circuit.

摘要翻译： 具有用于检测输入光信号的同相信号和正交信号的90度光混合电路的数字相干光接收机包括第一至第四电路。 第一电路计算同相信号和正交信号之和的平方。 第二电路从第一电路的计算结果中减去同相信号的平方值和正交信号的平方值。 第三电路基于第二电路的计算结果来检测90度光混合电路的相位误差。 第四电路根据由第三电路检测到的相位误差校正至少一个同相信号和正交信号。

公开(公告)号：US20120170928A1

公开(公告)日：2012-07-05

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： H04J14/02 ,  H04B10/08

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，从比特时间差给定信号发生器输入至少两个光信号，并且生成并输出在相位调制之间给出比特时间差的波长多路复用信号 光信号和强度调制光信号。

公开(公告)号：US07596315B2

公开(公告)日：2009-09-29

申请号：US10914313

申请日：2004-08-10

申请人： Hisao Nakashima ,  Takeshi Hoshida

发明人： Hisao Nakashima ,  Takeshi Hoshida

IPC分类号： H04J14/02

CPC分类号： H04J14/02 ,  H04B10/07 ,  H04B10/2503 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0279

摘要： In the wavelength division multiplexing optical transmission system according to the present invention, when setting the transmission wavelengths of the wavelength-variable optical transmitter in case of addition or expansion of the optical transmitter, each transmission wavelength is set automatically so as to match with each port wavelength of the input port in the multiplexer. Therefore, the setting workload of the optical transmitter is remarkably reduced, and occurrence of incorrect setting can be avoided. Also, with a simple and low-cost structure, the cost is restrained from increasing.

摘要翻译： 在根据本发明的波分复用光传输系统中，当在光发射机的添加或扩展的情况下设置波长可变光发射机的传输波长时，每个传输波长被自动设置以便与每个端口匹配 多路复用器中输入端口的波长。 因此，光发送机的设定工作量显着降低，可以避免错误设定的发生。 而且，通过简单且低成本的结构，成本也不受限制。

公开(公告)号：US20080080872A1

公开(公告)日：2008-04-03

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信号源输出信号数据1和数据2。 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。 检测结果被发送到振幅控制单元22。 振幅控制单元22调节驱动器1,2的振幅，使得功率监视器21的检测结果最大。

公开(公告)号：US20080031633A1

公开(公告)日：2008-02-07

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：US20070047969A1

公开(公告)日：2007-03-01

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

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：US20050213979A1

公开(公告)日：2005-09-29

申请号：US10914313

申请日：2004-08-10

申请人： Hisao Nakashima ,  Takeshi Hoshida

发明人： Hisao Nakashima ,  Takeshi Hoshida

IPC分类号： H04J14/00 ,  H04B10/071 ,  H04J14/02

CPC分类号： H04J14/02 ,  H04B10/07 ,  H04B10/2503 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0279

摘要： In the wavelength division multiplexing optical transmission system according to the present invention, when setting the transmission wavelengths of the wavelength-variable optical transmitter in case of addition or expansion of the optical transmitter, each transmission wavelength is set automatically so as to match with each port wavelength of the input port in the multiplexer. Therefore, the setting workload of the optical transmitter is remarkably reduced, and occurrence of incorrect setting can be avoided. Also, with a simple and low-cost structure, the cost is restrained from increasing.

摘要翻译： 在根据本发明的波分复用光传输系统中，当在光发射机的添加或扩展的情况下设置波长可变光发射机的传输波长时，每个传输波长被自动设置以便与每个端口匹配 多路复用器中输入端口的波长。 因此，光发送机的设定工作量显着降低，可以避免错误设定的发生。 而且，通过简单且低成本的结构，成本也不受限制。

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。