公开(公告)号：US20090257115A1

公开(公告)日：2009-10-15

申请号：US12489956

申请日：2009-06-23

申请人： Kosuke KOMAKI ,  Yuji Tamura

发明人： Kosuke KOMAKI ,  Yuji Tamura

IPC分类号： H01S3/00

CPC分类号： H04B10/2935 ,  H01S3/2316 ,  H04B10/0797

摘要： An optical amplifier includes a first optical amplification unit that amplifies input light, a variable optical attenuation unit that attenuates an output of the first optical amplification unit, a second optical amplification unit that amplifies an output of the variable optical attenuation unit, and a loss amount control unit that controls the variable optical attenuation unit, wherein an external attenuating optical medium is inserted between the variable optical attenuation unit and the second optical amplification unit. The optical amplifier includes an abnormality detecting unit that detects abnormality in optical loss based on a light level between the external attenuating optical medium and the second optical amplification unit, and a detection invalidating unit that invalidates any abnormality detected by the abnormality detecting unit when a light level between the variable optical attenuation unit and the external attenuating optical medium is lower than a threshold level.

摘要翻译： 光放大器包括放大输入光的第一光放大单元，衰减第一光放大单元的输出的可变光衰减单元，放大可变光衰减单元的输出的第二光放大单元， 控制单元，其控制可变光衰减单元，其中在可变光衰减单元和第二光放大单元之间插入外部衰减光介质。 光放大器包括：异常检测单元，其基于外部衰减光学介质和第二光学放大单元之间的光级检测光损耗的异常;以及检测无效单元，其使得当灯处于异常检测单元时检测到的异常 可变光衰减单元和外部衰减光介质之间的电平低于阈值电平。

公开(公告)号：US20110026940A1

公开(公告)日：2011-02-03

申请号：US12845291

申请日：2010-07-28

申请人： Kosuke KOMAKI

发明人： Kosuke KOMAKI

IPC分类号： H04B10/06

CPC分类号： H04B10/611 ,  H04B10/60 ,  H04B10/616

摘要： An optical communication device using a digital coherent reception system includes a phase detector configured to generate, based on a signal obtained in a course of digital signal processing, a phase signal indicating a displacement of a sampling of a reception signal, a clock switch-determiner configured to switch from an reference clock to a clock of transferred data when a value of an amplitude of the phase signal exceeds a given threshold value, and a selector configured to synchronize the sampling of the reception signal and an internal clock of the digital signal processing with the reference clock at start time or signal loss time, and synchronize the sampling of the reception signal and the internal clock with the line clock of the reception signal except for the start time and the signal loss time.

摘要翻译： 使用数字相干接收系统的光通信装置包括相位检测器，被配置为基于在数字信号处理过程中获得的信号产生指示接收信号的采样位移的相位信号，时钟切换确定器 被配置为当所述相位信号的振幅值超过给定阈值时从参考时钟切换到传送数据的时钟;以及选择器，被配置为使所述接收信号的采样与所述数字信号处理的内部时钟同步 与参考时钟在起始时间或信号丢失时间，并且接收信号和内部时钟的采样与除了开始时间和信号丢失时间之外的接收信号的行时钟同步。

公开(公告)号：US20120308227A1

公开(公告)日：2012-12-06

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： H04B10/08

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：US20110200339A1

公开(公告)日：2011-08-18

申请号：US13017874

申请日：2011-01-31

申请人： Kosuke KOMAKI ,  Masahiro Shioda ,  Katsumi Fukumitsu ,  Osamu Takeuchi

发明人： Kosuke KOMAKI ,  Masahiro Shioda ,  Katsumi Fukumitsu ,  Osamu Takeuchi

IPC分类号： H04B10/06

CPC分类号： H04B10/6971 ,  H04B10/61 ,  H04B10/611 ,  H04B10/613 ,  H04B10/6151 ,  H04B10/6161 ,  H04B10/6165 ,  H04L7/0004 ,  H04L7/0335 ,  H04L27/223 ,  H04L27/227

摘要： An optical receiver includes: a waveform distortion compensator to perform an operation on digital signal representing an optical signal generated by an A/D converter to compensate for waveform distortion of the optical signal; a phase detector to generate phase information representing sampling phase of the A/D converter; a phase adjuster to generate digital signal representing an optical signal in which the sampling phase of the A/D converter is adjusted from an output signal of the waveform distortion compensator using the phase information; a demodulator to generate a demodulated signal from the output signal of the phase adjuster; a phase controller to control the sampling phase of the A/D converter; a peak detector to detect a peak value of the phase information while the sampling phase of the A/D converter is controlled by the phase controller; and a compensation controller to control the waveform distortion compensator using the peak value.

摘要翻译： 光接收器包括：波形失真补偿器，用于对表示由A / D转换器产生的光信号的数字信号进行操作以补偿光信号的波形失真; 相位检测器，用于产生表示A / D转换器的采样相位的相位信息; 相位调节器，用于产生代表使用相位信息的波形失真补偿器的输出信号调整A / D转换器的采样相位的光信号的数字信号; 解调器，用于从所述相位调节器的输出信号产生解调信号; 控制A / D转换器采样相位的相位控制器; 峰值检测器，用于在由相位控制器控制A / D转换器的采样相位时检测相位信息的峰值; 以及使用峰值来控制波形失真补偿器的补偿控制器。

公开(公告)号：US20120087669A1

公开(公告)日：2012-04-12

申请号：US13252201

申请日：2011-10-04

申请人： Koji BIWA ,  Kosuke KOMAKI

发明人： Koji BIWA ,  Kosuke KOMAKI

IPC分类号： H04J14/02

CPC分类号： H04J14/0221 ,  H04B10/0773 ,  H04J14/0276

摘要： In an optical node, a transmitter produces an optical supervisory signal for supervising an optical network, a processor is operative to control a power level of the optical supervisory signal according to a per-wavelength power level of an optical communication signal when the optical node has no post amplifiers, and a multiplexer combines the controlled optical supervisory signal with the optical communication signal to be transmitted to another optical node located downstream.

摘要翻译： 在光节点中，发射机产生用于监视光网络的光监控信号，当光节点具有光通信信号时，处理器可操作以根据光通信信号的每波长功率电平来控制光监控信号的功率电平 没有后置放大器，并且多路复用器将受控光监控信号与要发送到位于下游的另一光节点的光通信信号组合。

公开(公告)号：US20110255877A1

公开(公告)日：2011-10-20

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

CPC分类号： H04B10/611 ,  H04B10/6164 ,  H04L27/223

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.

摘要翻译： 数字相干接收机包括前端，A / D转换器和处理器。 前端通过使用信号灯和本地振荡器光将光信号转换为电信号。 A / D转换器将前端的电信号转换为数字信号。 处理器计算由A / D转换器转换的数字信号的频谱重心，基于所计算的频谱重心估计数字信号的频率偏移，并且基于估计的频率偏移来减少数字信号的频率偏移 。

公开(公告)号：US20110229128A1

公开(公告)日：2011-09-22

申请号：US13004532

申请日：2011-01-11

申请人： Takeshi SAKAMOTO ,  Katsumi FUKUMITSU ,  Kosuke KOMAKI

发明人： Takeshi SAKAMOTO ,  Katsumi FUKUMITSU ,  Kosuke KOMAKI

IPC分类号： H04B10/08

CPC分类号： H04B10/0775 ,  H04B2210/074 ,  H04B2210/078

摘要： An optical node disposed along a transmission line that uses optical fiber. The optical node includes a first signal generator and a monitor. The first signal generator generates a first measurement signal for measuring polarization mode dispersion values and transmits the first measurement signal along the transmission line. The monitor detects a second measurement signal from the transmission line and measures polarization mode dispersion values by performing signal processing with respect to the second measurement signal.

摘要翻译： 沿着使用光纤的传输线设置的光学节点。 光节点包括第一信号发生器和监视器。 第一信号发生器产生用于测量偏振模色散值的第一测量信号，并沿传输线发送第一测量信号。 监视器从传输线检测第二测量信号，并通过对第二测量信号执行信号处理来测量偏振模色散值。