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1. 发明授权

US07778553B2 Optical transmitter 有权
标题翻译：光发射机
公开(公告)号：US07778553B2
公开(公告)日：2010-08-17
申请号：US11599277
申请日：2006-11-15
申请人： Masahiro Yuki , Kentaro Nakamura , Hiroki Ooi , Masato Nishihara
发明人： Masahiro Yuki , Kentaro Nakamura , Hiroki Ooi , Masato Nishihara
IPC分类号： H04B10/04
CPC分类号： H04B10/5051 , H04B10/5057 , H04B10/50577 , H04B10/58
摘要： In an optical transmitter of the invention, continuous light from a light source is a (CS)RZ-D(Q)PSK modulated by two optical modulators connected in series, and a part of the optical signal output from a post-stage optical modulator is branched by an output monitor section, and the power of a preset frequency component, excluding a frequency component corresponding to a baud rate, included in an electrical spectrum acquired by photoelectrically converting the branched beams is measured. The relative phase of drive signals applied to the optical modulators is then feed-back controlled so that the power becomes a minimum. As a result, a delay shift due to a temperature change or the like between drive signals applied to respective optical modulators, can be reliably compensated.
摘要翻译：在本发明的光发射机中，来自光源的连续光是由串联连接的两个光调制器调制的（CS）RZ-D（Q）PSK，并且从后级光调制器输出的一部分光信号由输出监视部分支，并且测量包括在通过光电转换分支光束获得的电谱中的除波特率对应的频率分量之外的预设频率分量的功率。然后反馈控制施加到光学调制器的驱动信号的相对相位，使得功率变得最小。结果，可以可靠地补偿由于施加到各个光学调制器的驱动信号之间的温度变化等引起的延迟偏移。

2. 发明申请

US20070264028A1 Optical transmitter 有权
标题翻译：光发射机
公开(公告)号：US20070264028A1
公开(公告)日：2007-11-15
申请号：US11599277
申请日：2006-11-15
申请人： Masahiro Yuki , Kentaro Nakamura , Hiroki Ooi , Masato Nishihara
发明人： Masahiro Yuki , Kentaro Nakamura , Hiroki Ooi , Masato Nishihara
IPC分类号： H04B10/04
CPC分类号： H04B10/5051 , H04B10/5057 , H04B10/50577 , H04B10/58
摘要： In an optical transmitter of the invention, continuous light from a light source is a (CS)RZ-D(Q)PSK modulated by two optical modulators connected in series, and a part of the optical signal output from a post-stage optical modulator is branched by an output monitor section, and the power of a preset frequency component, excluding a frequency component corresponding to a baud rate, included in an electrical spectrum acquired by photoelectrically converting the branched beams is measured. The relative phase of drive signals applied to the optical modulators is then feed-back controlled so that the power becomes a minimum. As a result, a delay shift due to a temperature change or the like between drive signals applied to respective optical modulators, can be reliably compensated.
摘要翻译：在本发明的光发射机中，来自光源的连续光是由串联连接的两个光调制器调制的（CS）RZ-D（Q）PSK，并且从后级光调制器输出的一部分光信号由输出监视部分支，并且测量包括在通过光电转换分支光束获得的电谱中的除波特率对应的频率分量之外的预设频率分量的功率。然后反馈控制施加到光学调制器的驱动信号的相对相位，使得功率变得最小。结果，可以可靠地补偿由于施加到各个光学调制器的驱动信号之间的温度变化等引起的延迟偏移。

3. 发明授权

US08582980B2 Optical device and optical modulation method 有权
标题翻译：光器件和光调制方法
公开(公告)号：US08582980B2
公开(公告)日：2013-11-12
申请号：US12013708
申请日：2008-01-14
申请人： Masato Nishihara , Tomoo Takahara , Yuichi Akiyama , Masahiro Yuki
发明人： Masato Nishihara , Tomoo Takahara , Yuichi Akiyama , Masahiro Yuki
IPC分类号： H04B10/04
CPC分类号： H04B10/548 , H04B10/5162
摘要： The disclosed device and method include varying phases of two data signals at a first predetermined frequency, performing multi-level phase modulation of a light based on the two data signals whose phases are varied at the first predetermined frequency, extracting a component having the first predetermined frequency from an optical signal subjected to the phase modulation, and controlling the phases of the two data signals based on the component extracted from the optical signal.
摘要翻译：所公开的设备和方法包括以第一预定频率改变两个数据信号的相位，基于相位以第一预定频率变化的两个数据信号执行光的多电平相位调制，提取具有第一预定频率的分量来自经过相位调制的光信号的频率，并且基于从光信号提取的分量来控制两个数据信号的相位。

4. 发明授权

US08666252B2 Optical network system 有权
标题翻译：光网络系统
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。

5. 发明授权

US08582981B2 Optical transmitter and control method therefor 有权
标题翻译：光发射机及其控制方法
公开(公告)号：US08582981B2
公开(公告)日：2013-11-12
申请号：US12013857
申请日：2008-01-14
申请人： Yuichi Akiyama , Hideyuki Miyata , Toshiki Tanaka , Masato Nishihara
发明人： Yuichi Akiyama , Hideyuki Miyata , Toshiki Tanaka , Masato Nishihara
IPC分类号： H04B10/00
CPC分类号： H04B10/5053 , H04B10/50 , H04B10/50575
摘要： The disclosed optical transmitter and control method include performing phase modulation of a light propagating through a corresponding optical path in accordance with a data signal, supplying bias voltages for regulating an operating point of each of phase modulation performed, imparting a predetermined phase difference, supplying bias voltages for phase difference regulation and coupling lights output from the corresponding optical paths. The optical transmitter includes superimposing a pilot signal on either one of bias voltages where the pilot signal has a frequency lower than a frequency of a bit rate of the data signal, and performing a feedback control in accordance with a result of monitoring.
摘要翻译：所公开的光发射机和控制方法包括根据数据信号执行通过对应的光路传播的光的相位调制，提供用于调节执行的每个相位调制的工作点的偏置电压，赋予预定的相位差，提供偏置用于从相应光路输出的相位差调节和耦合光的电压。光发射机包括将导频信号叠加在导频信号的频率低于数据信号的比特率的频率的偏置电压中的任一个上，并且根据监视的结果进行反馈控制。

6. 发明申请

US20090219609A1 Optical amplifier provided with control function of pumping light, and optical transmission system using the same 有权
标题翻译：光放大器提供了泵浦光的控制功能，以及使用它的光传输系统
公开(公告)号：US20090219609A1
公开(公告)日：2009-09-03
申请号：US12320938
申请日：2009-02-09
申请人： Yasushi Sugaya , Etsuko Hayashi , Masato Nishihara , Shinichirou Muro
发明人： Yasushi Sugaya , Etsuko Hayashi , Masato Nishihara , Shinichirou Muro
IPC分类号： H01S3/30
CPC分类号： G02B6/264 , H01S3/005 , H01S3/0078 , H01S3/06758 , H01S3/094003 , H01S3/094096 , H01S3/0941 , H01S3/1301 , H01S3/1305 , H01S3/1608 , H01S3/302 , H04B10/2916
摘要： In an optical transmission system according to one aspect of the present invention, for transmitting a WDM light from a transmission station to a reception station, utilizing a Raman amplifier, the Raman amplifier comprises: an optical amplification medium; a pumping light source generating a plurality of pumping lights having wavelengths different from each other; an optical device introducing the plurality of pumping lights to the optical amplification medium; and control means for controlling the pumping light source, the transmission station sends out a plurality of reference lights having wavelengths at which respective Raman gain obtained by the plurality of pumping lights reach peaks or wavelengths close to the above wavelengths, and the control means controls the plurality of pumping lights based on the optical powers of the plurality of reference lights. Thus, it becomes possible to accurately manage the optical power balance of the WDM light and the optical power of the entire WDM light.
摘要翻译：在根据本发明的一个方面的光传输系统中，为了利用拉曼放大器将来自发射站的WDM光发射到接收站，所述拉曼放大器包括：光放大介质; 产生具有彼此不同波长的多个泵浦光的泵浦光源; 将所述多个泵浦光引入所述光放大介质的光学装置; 以及用于控制所述泵浦光源的控制装置，所述发送站发出多个具有波长的参考光，所述波长使由所述多个泵浦光获得的各拉曼增益达到接近上述波长的波峰或波长，并且所述控制装置控制基于多个参考光的光功率的多个泵浦光。因此，可以精确地管理WDM光的光功率平衡和整个WDM光的光功率。

7. 发明授权

US08855498B2 Skew suppression method and optical transmission system 有权
标题翻译：偏斜抑制方法和光传输系统
公开(公告)号：US08855498B2
公开(公告)日：2014-10-07
申请号：US13369365
申请日：2012-02-09
申请人： Toshiki Tanaka , Masato Nishihara
发明人： Toshiki Tanaka , Masato Nishihara
IPC分类号： H04B10/00 , H04B10/08 , H04B10/50
CPC分类号： H04B10/5055 , H04B2210/254
摘要： A method for suppressing a skew between a first channel and a second channel in an optical transmission system having a transmitter that transmits an optical signal with the first channel and the second channel and a receiver that receives the optical signal, the method includes: controlling dispersion added to the optical signal to be larger than a specified amount; and controlling a delay time of at least one of the first channel and the second channel in the receiver based on a quality of the optical signal monitored in the receiver to suppress the skew between the first channel and the second channel in the receiver.
摘要翻译：一种用于抑制具有发送光信号与第一信道和第二信道的发射机的光传输系统中的第一信道和第二信道之间的偏斜的方法以及接收光信号的接收机，该方法包括：控制色散添加到光信号大于指定量; 以及基于在接收机中监视的光信号的质量来控制接收机中的第一信道和第二信道中的至少一个的延迟时间，以抑制接收机中第一信道和第二信道之间的偏斜。

8. 发明授权

US08693891B2 Optical modulation apparatus and optical modulation method 有权
标题翻译：光调制装置及光调制方式
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。

9. 发明授权

US08301039B2 Delay processing apparatus, signal amplification apparatus, opto-electric conversion apparatus, analog-digital conversion apparatus, receiving apparatus, and receiving method 有权
标题翻译：延迟处理装置，信号放大装置，光电转换装置，模拟数字转换装置，接收装置和接收方法
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。

10. 发明申请

US20120148235A1 CONTROL CIRCUIT, COMMUNICATION SYSTEM, AND CONTROL METHOD 审中-公开
标题翻译：控制电路，通信系统和控制方法
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。

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