公开(公告)号：US07817925B2

公开(公告)日：2010-10-19

申请号：US11567354

申请日：2006-12-06

申请人： Toshiki Honda ,  Kazuhiro Kunimatsu ,  Takeshi Ono ,  Katsumi Fukumitsu ,  Masakazu Ozaki

发明人： Toshiki Honda ,  Kazuhiro Kunimatsu ,  Takeshi Ono ,  Katsumi Fukumitsu ,  Masakazu Ozaki

IPC分类号： H04B10/06

CPC分类号： H04B10/25133 ,  H04B10/697

摘要： An optical signal, which is a low-speed signal superimposed on a high-speed phase modulated optical signal by intensity modulation, is used. In an optical receiver apparatus 40, a received signal is split, and one of the split signals is O/E converted and low frequency component alone is extracted via a filter 46. A clock is extracted from low-frequency component by CDR, and is compared with a preset frequency. Using the frequency difference obtained, dispersion compensation is performed with low accuracy. Next, the amount of phase control of the delay interferometer 21 is adjusted so that the amplitude of the electrical signal is maximized. An error rate is measured, and fine adjustment is performed to improve the error rate.

摘要翻译： 使用通过强度调制叠加在高速相位调制光信号上的低速信号的光信号。 在光接收装置40中，接收信号被分割，分割信号中的一个被O / E转换，并且经由滤波器46单独提取低频分量。通过CDR从低频分量提取时钟，并且是 与预设频率相比。 使用所获得的频差，以低精度执行色散补偿。 接下来，调整延迟干涉仪21的相位控制量，使得电信号的振幅最大化。 测量错误率，进行微调以提高错误率。

公开(公告)号：US20070297804A1

公开(公告)日：2007-12-27

申请号：US11567354

申请日：2006-12-06

申请人： Toshiki Honda ,  Kazuhiro Kunimatsu ,  Takeshi Ono ,  Katsumi Fukumitsu ,  Masakazu Ozaki

发明人： Toshiki Honda ,  Kazuhiro Kunimatsu ,  Takeshi Ono ,  Katsumi Fukumitsu ,  Masakazu Ozaki

IPC分类号： H04B10/12

CPC分类号： H04B10/25133 ,  H04B10/697

摘要： An optical signal, which is a low-speed signal superimposed on a high-speed phase modulated optical signal by intensity modulation, is used. In an optical receiver apparatus 40, a received signal is split, and one of the split signals is O/E converted and low frequency component alone is extracted via a filter 46. A clock is extracted from low-frequency component by CDR, and is compared with a preset frequency. Using the frequency difference obtained, dispersion compensation is performed with low accuracy. Next, the amount of phase control of the delay interferometer 21 is adjusted so that the amplitude of the electrical signal is maximized. An error rate is measured, and fine adjustment is performed to improve the error rate.

摘要翻译： 使用通过强度调制叠加在高速相位调制光信号上的低速信号的光信号。 在光接收机装置40中，接收信号被分离，其中一个分割信号被O / E转换，并且仅通过滤波器46提取低频分量。 通过CDR从低频分量提取时钟，并将其与预设频率进行比较。 使用所获得的频差，以低精度执行色散补偿。 接下来，调整延迟干涉仪21的相位控制量，使得电信号的振幅最大化。 测量错误率，进行微调以提高错误率。

公开(公告)号：US20070071447A1

公开(公告)日：2007-03-29

申请号：US11313966

申请日：2005-12-22

申请人： Masakazu Ozaki ,  Katsumi Fukumitsu

发明人： Masakazu Ozaki ,  Katsumi Fukumitsu

IPC分类号： H04B10/12

CPC分类号： H04B10/25133 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0279 ,  H04J14/0283 ,  H04J14/0294

摘要： An optical receiving apparatus has a route change detector for detecting occurrence of a route change of received signal light, a memory for beforehand storing optimum dispersion compensation quantity for the received signal light before and after the route change, a tunable dispersion compensator for compensating dispersion of the received signal light, and a controller for controlling a dispersion compensation quantity used by the tunable dispersion compensator according to the optimum dispersion compensation quantity for the received signal light after the route change, which is beforehand stored in the memory, when the route change detector detects occurrence of the route change. The dispersion compensation quantity can be optimized at high-speed for each of optical transmission routes of the received signal light.

摘要翻译： 光接收装置具有用于检测接收信号光的路线变化的发生的路径变化检测器，用于预先存储在路由改变之前和之后的接收信号光的最佳色散补偿量的存储器，用于补偿色散的可调色散补偿器 接收信号光，以及控制器，用于当路线改变检测器预先存储在存储器中时，根据用于在路由改变之后的接收信号光的最佳色散补偿量来控制由可调色散补偿器使用的色散补偿量 检测路线变化的发生。 对于接收信号光的每个光传输路径，色散补偿量可以高速优化。

公开(公告)号：US08655185B2

公开(公告)日：2014-02-18

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： H04B10/00

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。

公开(公告)号：US20090028580A1

公开(公告)日：2009-01-29

申请号：US12149381

申请日：2008-04-30

申请人： Hisayuki Ojima ,  Katsumi Fukumitsu

发明人： Hisayuki Ojima ,  Katsumi Fukumitsu

IPC分类号： H04B10/06

CPC分类号： H04B10/677

摘要： The optical reception apparatus of the invention branches into two an RZ-DQPSK optical signal input from an optical transmission path via an optical amplifier, respectively sends this to delay interferometers and photoelectric converters on a pair of arms, separately detects a number of generated errors for the signals propagating through the arms in an error-number detection circuit, obtains a difference in the respective number of generated errors in an error-number detector, and controls phase shift in the delay interferometers so that the difference is within a preset tolerance. By so doing, it is possible to realize excellent reception performance by suppressing the occurrence of the burst error.

摘要翻译： 本发明的光接收装置分支经由光放大器从光传输路径输入的两个RZ-DQPSK光信号分别发送到一对臂上的延迟干涉仪和光电转换器，分别检测多个产生的错误， 在错误号检测电路中通过臂传播的信号获得误差检测器中产生的误差的数量的差异，并且控制延迟干涉仪中的相移，使得差值在预设容差内。 通过这样做，可以通过抑制突发错误的发生来实现良好的接收性能。

公开(公告)号：US07711218B2

公开(公告)日：2010-05-04

申请号：US12149381

申请日：2008-04-30

申请人： Hisayuki Ojima ,  Katsumi Fukumitsu

发明人： Hisayuki Ojima ,  Katsumi Fukumitsu

IPC分类号： G02B6/28

CPC分类号： H04B10/677

摘要： The optical reception apparatus of the invention branches into two an RZ-DQPSK optical signal input from an optical transmission path via an optical amplifier, respectively sends this to delay interferometers and photoelectric converters on a pair of arms, separately detects a number of generated errors for the signals propagating through the arms in an error-number detection circuit, obtains a difference in the respective number of generated errors in an error-number detector, and controls phase shift in the delay interferometers so that the difference is within a preset tolerance. By so doing, it is possible to realize excellent reception performance by suppressing the occurrence of the burst error.

摘要翻译： 本发明的光接收装置分支经由光放大器从光传输路径输入的两个RZ-DQPSK光信号分别发送到一对臂上的延迟干涉仪和光电转换器，分别检测多个产生的错误， 在错误号检测电路中通过臂传播的信号获得误差检测器中产生的误差的数量的差异，并且控制延迟干涉仪中的相移，使得差值在预设容差内。 通过这样做，可以通过抑制突发错误的发生来实现良好的接收性能。

公开(公告)号：US08649678B2

公开(公告)日：2014-02-11

申请号：US12488745

申请日：2009-06-22

申请人： Takeshi Hoshida ,  Katsumi Fukumitsu

发明人： Takeshi Hoshida ,  Katsumi Fukumitsu

IPC分类号： H04B10/08

CPC分类号： H04J14/0227 ,  H04J14/0246 ,  H04J14/0279 ,  H04J14/0283 ,  H04L1/0036 ,  H04L1/0053 ,  H04L1/203 ,  H04L43/0847

摘要： The technique for improving the efficiency in use of power resources while maintaining the received signal quality that satisfies the requirement during a system operation is disclosed. The frame processing apparatus disclosed in the present case includes: a frame processing unit which performs frame processing on an input signal in the designated error processing mode; and a controlling unit which receives the monitoring result relating to the signal quality of the input signal and performs switching control of the designation of the above error processing mode in the frame processing unit based on the received monitoring result.

摘要翻译： 公开了一种提高电力资源使用效率的技术，同时保持在系统操作期间满足要求的接收信号质量。 在本例中公开的帧处理装置包括：帧处理部，其以指定的误差处理模式对输入信号进行帧处理; 以及控制单元，其接收与输入信号的信号质量相关的监视结果，并且基于接收的监视结果执行帧处理单元中的上述错误处理模式的指定的切换控制。

公开(公告)号：US5703409A

公开(公告)日：1997-12-30

申请号：US283783

申请日：1994-08-01

申请人： Katsumi Fukumitsu ,  Tadayuki Takada

发明人： Katsumi Fukumitsu ,  Tadayuki Takada

IPC分类号： H04B10/556 ,  H04B10/03 ,  H04B10/07 ,  H04L1/00 ,  H04L1/24 ,  G06F11/00

CPC分类号： H04L1/24

摘要： An error counting circuit is adapted to count a number of code errors of a main signal in an external apparatus which is coupled to an optical transmission path. The error counting circuit includes an error counter which counts error pulses received from the external apparatus and indicative of the number of code errors of the main signal in response to clock pulses having a predetermined period and outputting a counted value for each the predetermined period, and a mechanism for stopping a counting operation of the error counter when a power failure of the external apparatus occurs, so that an erroneous counting operation of the error counter is prevented.

摘要翻译： 错误计数电路适于对连接到光传输路径的外部设备中的主信号的码错误数进行计数。 误差计数电路包括：误差计数器，对来自外部设备的误差脉冲进行计数，并响应于具有预定周期的时钟脉冲指示主信号的码错误数，并输出每个预定周期的计数值;以及 发生外部设备的电源故障时停止错误计数器的计数操作的机构，从而防止错误计数器的错误计数操作。

公开(公告)号：US08295715B2

公开(公告)日：2012-10-23

申请号：US12318585

申请日：2008-12-31

申请人： Katsumi Fukumitsu

发明人： Katsumi Fukumitsu

IPC分类号： H04B10/06

CPC分类号： H04B10/677

摘要： An optical receiver includes: delay interferometers respectively provided in at least two branches that branch a reception signal; a phase shift amount control device that controls a phase shift amount of the delay interferometer in accordance with an optical phase control value; a balanced optical detecting section that respectively photoelectrically converts respective branch signals output from the delay interferometers; a data regenerating section that regenerates transmission data from the photoelectrically converted branch signals output from the balanced optical detecting section; a control section that outputs the optical phase control value based on a signal of the data regenerating section; and a memory that stores therein the optical phase control value output from the control section at the time of signal communication, as a history of control values, wherein the control section refers to the history of control values during a signal communication operation to determine the optical phase control value.

摘要翻译： 光接收机包括：延迟干涉仪分别设置在分支接收信号的至少两个分支中; 相移量控制装置，其根据光学相位控制值控制所述延迟干涉仪的相移量; 平衡光学检测部分，其对从延迟干涉仪输出的各个分支信号进行光电转换; 数据再生部，从平衡光检测部输出的光电转换支路信号中再生发送数据; 控制部，其基于数据再生部的信号输出光相位控制值; 以及存储器，其中存储在信号通信时从控制部分输出的光相位控制值作为控制值的历史，其中控制部分参考在信号通信操作期间的控制值的历史以确定光学 相位控制值。

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。