公开(公告)号：US08666252B2

公开(公告)日：2014-03-04

申请号：US13420043

申请日：2012-03-14

申请人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

发明人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

IPC分类号： H04B10/00

CPC分类号： H04J14/0257 ,  H04J14/0204 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0221 ,  H04J14/0256 ,  H04J14/0283

摘要： There is provided an optical network system in which optical signals modulated by each of at least two modulation methods are wavelength-division-multiplexed and transferred, including: an optical transmitter configured to transmit first optical signals modulated by each of at least two modulation methods; an add-drop multiplexer configured to drop second optical signals from wavelength-division-multiplexed optical signals transferred in the optical network system, and add the first optical signals to the wavelength-division-multiplexed optical signals; an optical receiver configured to demodulate the second optical signals corresponding to each of at least two modulation methods; and a controller configured to control wavelengths of the first optical signals, the second optical signals and the wavelength-division-multiplexed optical signals so as to rearrange wavelengths of the first optical signals, the second optical signals and the wavelength-division-multiplexed optical signals so that optical signals modulated by a same modulation method are placed on an adjacent wavelength.

摘要翻译： 提供了一种光网络系统，其中由至少两种调制方法中的每一种调制的光信号被波分复用和传送，包括：光发射机，被配置为发送由至少两种调制方法中的每一种调制的第一光信号; 一种分插复用器，被配置为从光网络系统中传输的波分复用光信号中丢弃第二光信号，并将第一光信号加到波分复用光信号上; 光接收机，被配置为解调对应于至少两种调制方法中的每一种的第二光信号; 以及控制器，被配置为控制第一光信号的波长，第二光信号和波分复用光信号，以便重新排列第一光信号的波长，第二光信号和波分复用光信号 使得通过相同调制方法调制的光信号被放置在相邻的波长上。

公开(公告)号：US20120148235A1

公开(公告)日：2012-06-14

申请号：US13315560

申请日：2011-12-09

申请人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

发明人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

IPC分类号： H04B10/00 ,  H04J14/02 ,  H04B10/06 ,  H04B10/08

CPC分类号： H04B10/07951 ,  H04B10/572 ,  H04B10/612 ,  H04B10/613 ,  H04B10/614 ,  H04B10/615 ,  H04B10/616 ,  H04B10/6161 ,  H04J14/0212 ,  H04J14/0256 ,  H04J14/0271 ,  H04J14/0279

摘要： A communication system includes a transmitter, a receiver device, and a control circuit. The transmitter transmits an optical signal. The receiver device receives the optical signal. The control circuit reduces a power consumption of the receiver device based on an accumulated chromatic dispersion of the received optical signal. The receiver device includes a receiver, an analog/digital converter, and a digital signal processor. The receiver extracts a signal indicating a complex amplitude of the optical signal. The analog/digital converter converts the signal indicating the complex amplitude into a digital signal. The digital signal processor digitally-processes the digital signal.

摘要翻译： 通信系统包括发射机，接收机设备和控制电路。 发射机发射光信号。 接收机设备接收光信号。 控制电路基于所接收的光信号的累积色散来降低接收机设备的功耗。 接收机设备包括接收机，模拟/数字转换器和数字信号处理器。 接收机提取表示光信号的复振幅的信号。 模拟/数字转换器将指示复振幅的信号转换为数字信号。 数字信号处理器对数字信号进行数字处理。

公开(公告)号：US20120237212A1

公开(公告)日：2012-09-20

申请号：US13420043

申请日：2012-03-14

申请人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

发明人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

IPC分类号： H04J14/02 ,  H04B10/08

CPC分类号： H04J14/0257 ,  H04J14/0204 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0221 ,  H04J14/0256 ,  H04J14/0283

摘要： There is provided an optical network system in which optical signals modulated by each of at least two modulation methods are wavelength-division-multiplexed and transferred, including: an optical transmitter configured to transmit first optical signals modulated by each of at least two modulation methods; an add-drop multiplexer configured to drop second optical signals from wavelength-division-multiplexed optical signals transferred in the optical network system, and add the first optical signals to the wavelength-division-multiplexed optical signals; an optical receiver configured to demodulate the second optical signals corresponding to each of at least two modulation methods; and a controller configured to control wavelengths of the first optical signals, the second optical signals and the wavelength-division-multiplexed optical signals so as to rearrange wavelengths of the first optical signals, the second optical signals and the wavelength-division-multiplexed optical signals so that optical signals modulated by a same modulation method are placed on an adjacent wavelength.

摘要翻译： 提供了一种光网络系统，其中由至少两种调制方法中的每一种调制的光信号被波分复用和传送，包括：光发射机，被配置为发送由至少两种调制方法中的每一种调制的第一光信号; 一种分插复用器，被配置为从光网络系统中传输的波分复用光信号中丢弃第二光信号，并将第一光信号加到波分复用光信号上; 光接收机，被配置为解调对应于至少两种调制方法中的每一种的第二光信号; 以及控制器，被配置为控制第一光信号的波长，第二光信号和波分复用光信号，以便重新排列第一光信号的波长，第二光信号和波分复用光信号 使得通过相同调制方法调制的光信号被放置在相邻的波长上。

公开(公告)号：US08565617B2

公开(公告)日：2013-10-22

申请号：US12219860

申请日：2008-07-29

申请人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

发明人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

IPC分类号： H04B10/04

CPC分类号： H04B10/5561 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/5057 ,  H04B10/5162 ,  H04B10/58

摘要： An optical modulation device including waveform shapers that waveform-shape input data signals in synchronism with a rising or falling timing based on comparison with a reference level of an input clock signal, a multi-level phase modulator that generates a multi-level-phase-modulated optical signal based on the data signals waveform-shaped by the plurality of waveform shapers, and outputs the generated optical signal, and a level ratio controller that varies a relative level ratio of the reference level to an amplitude level of the clock signal input to the waveform shapers, based on the optical signal output from the multi-level phase modulator.

公开(公告)号：US08073339B2

公开(公告)日：2011-12-06

申请号：US12219860

申请日：2008-07-29

申请人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

发明人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

IPC分类号： H04B10/04

摘要： An optical modulation device including waveform shapers that waveform-shape input data signals in synchronism with a rising or falling timing based on comparison with a reference level of an input clock signal, a multi-level phase modulator that generates a multi-level-phase-modulated optical signal based on the data signals waveform-shaped by the plurality of waveform shapers, and outputs the generated optical signal, and a level ratio controller that varies a relative level ratio of the reference level to an amplitude level of the clock signal input to the waveform shapers, based on the optical signal output from the multi-level phase modulator.

公开(公告)号：US20090041473A1

公开(公告)日：2009-02-12

申请号：US12219860

申请日：2008-07-29

申请人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

发明人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

IPC分类号： H04B10/04

CPC分类号： H04B10/5561 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/5057 ,  H04B10/5162 ,  H04B10/58

摘要： An optical modulation device including waveform shapers that waveform-shape input data signals in synchronism with a rising or falling timing based on comparison with a reference level of an input clock signal, a multi-level phase modulator that generates a multi-level-phase-modulated optical signal based on the data signals waveform-shaped by the plurality of waveform shapers, and outputs the generated optical signal, and a level ratio controller that varies a relative level ratio of the reference level to an amplitude level of the clock signal input to the waveform shapers, based on the optical signal output from the multi-level phase modulator.

摘要翻译： 一种光调制装置，包括：波形整形器，其基于与输入时钟信号的基准电平的比较，与上升或下降定时同步的波形输入数据信号，产生多电平相位调制器的多电平相位调制器， 基于由多个波形整形器波形形成的数据信号的调制光信号，并输出所生成的光信号;以及电平比控制器，其将参考电平的相对电平比改变为输入到 波形整形器，基于从多电平相位调制器输出的光信号。

公开(公告)号：US08693891B2

公开(公告)日：2014-04-08

申请号：US13048150

申请日：2011-03-15

申请人： Masato Nishihara ,  Tomoo Takahara ,  Takeshi Hoshida

发明人： Masato Nishihara ,  Tomoo Takahara ,  Takeshi Hoshida

IPC分类号： H04J14/06 ,  H04B10/04 ,  H04B10/00

CPC分类号： H04B10/505 ,  H04B10/5162

摘要： An optical modulation apparatus includes a first modulator, a second modulator, a multiplexer, a calculator and an adjustor. The first modulator configured to modulate light emitted by a light source using a first input signal and output a first modulated signal. The second modulator configured to modulate the light using a second input signal and output a second modulated signal. The multiplexer configured to multiplex the first and second modulated signals and output a multiplexed signal. The calculator configured to calculate a power difference between a higher-side frequency component having a frequency higher than a center frequency of the multiplexed signal and a lower-side frequency component having a frequency lower than the center frequency. The adjustor configured to adjust delays of the first and second input signals based on the power.

摘要翻译： 光调制装置包括第一调制器，第二调制器，多路复用器，计算器和调节器。 第一调制器被配置为使用第一输入信号调制由光源发射的光并输出第一调制信号。 第二调制器被配置为使用第二输入信号调制光并输出第二调制信号。 复用器被配置为复用第一和第二调制信号并输出​​多路复用信号。 所述计算器被配置为计算频率高于所述多路复用信号的中心频率的较高侧频率分量与具有低于所述中心频率的频率的下侧频率分量之间的功率差。 调整器被配置为基于功率来调整第一和第二输入信号的延迟。

公开(公告)号：US08301039B2

公开(公告)日：2012-10-30

申请号：US12620540

申请日：2009-11-17

申请人： Masato Nishihara ,  Tomoo Takahara ,  Hisao Nakashima

发明人： Masato Nishihara ,  Tomoo Takahara ,  Hisao Nakashima

IPC分类号： H04B10/06

CPC分类号： H04B10/614 ,  H04B10/61 ,  H04B10/613 ,  H04B10/6165

摘要： A delay device that provides a delay amount to at least one of the in-phase signal and the quadrature signal, and a delay control section that controls the delay amount provided by the delay device based on a quality of the signals when the in-phase signal and the quadrature signal, to the at least one of which the delay amount is provided, at the delay device are converted into digital signals by the analog-digital converter, and the digital signal processing is carried out at the processor are provided. Thereby, the signal quality of recovered data at a receiving end of a multi-level phase modulation communication system is improved.

摘要翻译： 一种向至少一个同相信号和正交信号提供延迟量的延迟装置，以及延迟控制部分，当延迟装置根据同相信号和正交信号中的信号质量， 信号和正交信号至延迟装置中提供的延迟量中的至少一个被模拟数字转换器转换成数字信号，并且在处理器处执行数字信号处理。 因此，提高了在多级相位调制通信系统的接收端的恢复数据的信号质量。

公开(公告)号：US20100178065A1

公开(公告)日：2010-07-15

申请号：US12620540

申请日：2009-11-17

申请人： Masato Nishihara ,  Tomoo Takahara ,  Hisao Nakahima

发明人： Masato Nishihara ,  Tomoo Takahara ,  Hisao Nakahima

IPC分类号： H04B10/06 ,  H03M1/12

CPC分类号： H04B10/614 ,  H04B10/61 ,  H04B10/613 ,  H04B10/6165

摘要： A delay device that provides a delay amount to at least one of the in-phase signal and the quadrature signal, and a delay control section that controls the delay amount provided by the delay device based on a quality of the signals when the in-phase signal and the quadrature signal, to the at least one of which the delay amount is provided, at the delay device are converted into digital signals by the analog-digital converter, and the digital signal processing is carried out at the processor are provided. Thereby, the signal quality of recovered data at a receiving end of a multi-level phase modulation communication system is improved.

摘要翻译： 一种向至少一个同相信号和正交信号提供延迟量的延迟装置，以及延迟控制部分，当延迟装置根据同相信号和正交信号中的信号质量， 信号和正交信号至延迟装置中提供的延迟量中的至少一个被模拟数字转换器转换成数字信号，并且在处理器处执行数字信号处理。 因此，提高了在多级相位调制通信系统的接收端的恢复数据的信号质量。

公开(公告)号：US08611760B2

公开(公告)日：2013-12-17

申请号：US12394729

申请日：2009-02-27

申请人： Masato Nishihara ,  Tomoo Takahara

发明人： Masato Nishihara ,  Tomoo Takahara

IPC分类号： H04B10/00 ,  H04B10/50

CPC分类号： H04B10/50577 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/58

摘要： An optical modulation device and method thereof is provided. The optical modulation device includes a decision circuit making a decision with respect to an input data signal in accordance with a timing of a first clock signal, a first modulator modulating light output based on the data signal by the decision circuit; a second modulator modulating the modulated light in accordance with a timing of a second clock signal; and delay controller delaying the first clock signal within a range of a phase margin of a decision circuit, and delaying the second clock signal, thereby controlling a state of a phase difference between the data signal and the second clock signal.

摘要翻译： 提供了一种光调制装置及其方法。 光调制装置包括：判定电路，根据第一时钟信号的定时，对输入数据信号进行判定，第一调制器，根据判定电路调制基于数据信号的光输出; 根据第二时钟信号的定时调制调制光的第二调制器; 延迟控制器在判定电路的相位裕度的范围内延迟第一时钟信号，并延迟第二时钟信号，从而控制数据信号与第二时钟信号之间的相位差的状态。