公开(公告)号：US08621316B2

公开(公告)日：2013-12-31

申请号：US12987368

申请日：2011-01-10

申请人： Yoshikuni Miyata ,  Hideo Yoshida ,  Kazuo Kubo ,  Takashi Mizuochi

发明人： Yoshikuni Miyata ,  Hideo Yoshida ,  Kazuo Kubo ,  Takashi Mizuochi

IPC分类号： G06F11/00 ,  H03M13/00

CPC分类号： H04L1/0071 ,  H03M13/1102 ,  H03M13/1515 ,  H03M13/152 ,  H03M13/23 ,  H03M13/271 ,  H03M13/29 ,  H03M13/2945 ,  H03M13/2957 ,  H03M13/2963 ,  H03M13/356 ,  H03M13/6561 ,  H03M13/6577 ,  H04L1/0065

摘要： An error correction encoding device includes an outer encoding circuit that performs encoding processing for an outer code and an inner encoding circuit that performs encoding processing for an inner code. The inner encoding circuit includes an inner-encoding input circuit that performs interleaving processing in which a parallel input sequence is divided into lanes and in which a barrel shift is performed for each inner frame in the lanes. Thus, allocation ratios between an information sequence area and a parity sequence area are made uniform.

摘要翻译： 纠错编码装置包括对外部码进行编码处理的外部编码电路和对内部码进行编码处理的内部编码电路。 内部编码电路包括内部编码输入电路，其执行交织处理，其中并行输入序列被划分为通道，并且其中对车道中的每个内部框架执行桶形移位。 因此，使信息序列区域和奇偶序列区域之间的分配比率一致。

公开(公告)号：US08478089B2

公开(公告)日：2013-07-02

申请号：US13040840

申请日：2011-03-04

申请人： Yuji Akiyama ,  Takashi Mizuochi

发明人： Yuji Akiyama ,  Takashi Mizuochi

IPC分类号： G02B6/26 ,  G02B6/42

CPC分类号： H04Q11/0005 ,  H04Q2011/0039 ,  H04Q2011/0049 ,  H04Q2011/0052

摘要： An optical switch according to the present invention includes a multiple-stage optical-switch unit that includes one input port and a plurality of output ports that are configured by connecting multiple stages of optical switching elements each of which includes three or more optical input-output ports; and a switching control circuit that, when receiving a switching instruction to switch an output destination of light input from the input port, executes at first a first control that changes setting of an optical switching element that is included in part not overlapping with an optical transmission channel reaching an optical output port before switching in an optical transmission channel reaching an optical output port after switching and is positioned at a point other than a branch point from an overlapping part, and then executes a second control that changes setting of an optical switching element that is positioned at the branch point.

摘要翻译： 根据本发明的光开关包括多级光开关单元，其包括一个输入端口和多个输出端口，所述多个输出端口通过连接多级光开关元件而构成，每个光开关元件包括三个或更多个光输入 - 输出 港口 以及切换控制电路，当接收到切换从输入端口输入的光的输出目的地的切换指令时，首先执行改变与光传输不重叠的部分中包括的光开关元件的设置的第一控制 在切换之后切换到达到光输出端口的光传输通道之前，通道到达光输出端口，并且位于不同于重叠部分的分支点之外的点，然后执行改变光开关元件的设置的第二控制 位于分支点。

公开(公告)号：US20130129356A1

公开(公告)日：2013-05-23

申请号：US13814513

申请日：2010-09-03

申请人： Toshiyuki Tokura ,  Kazuyuki Ishida ,  Takashi Mizuochi

发明人： Toshiyuki Tokura ,  Kazuyuki Ishida ,  Takashi Mizuochi

IPC分类号： H04J14/02 ,  H04B10/29

CPC分类号： H04J14/02 ,  H04B10/0777 ,  H04B10/29 ,  H04B10/2916 ,  H04B2210/074 ,  H04J14/0276

摘要： An optical communication system includes an optical-signal transmission unit transmitting an existing optical signal and a low-rate-signal superimposition unit superimposing a low-rate signal on the existing optical signal by intensity modulation. It further includes: a low-rate-signal extraction unit that extracts the low-rate signal from the existing optical signal on which the low-rate signal is superimposed and converts the extracted low-rate signal into a low-rate electric signal; an add-on optical-signal transmission unit that transmits an add-on optical signal; a low-rate-signal superimposition unit that superimposes a low-rate signal on the add-on optical signal by the intensity modulation based on the low-rate electric signal; and a repeater that repeats the add-on optical signal on which the low-rate signal is superimposed, to a transmission destination.

摘要翻译： 光通信系统包括光信号传输单元，其通过强度调制将现有光信号和低速信号叠加单元传输到现有光信号上。 其还包括：低速率信号提取单元，从叠加了低速率信号的现有光信号中提取低速信号，并将提取的低速信号转换为低速电信号; 发送附加光信号的附加光信号传输单元; 低速率信号叠加单元，其通过基于低速率电信号的强度调制将低速率信号叠加在附加光信号上; 以及将重叠了低速率信号的附加光信号重复到发送目的地的中继器。

公开(公告)号：US20130039643A1

公开(公告)日：2013-02-14

申请号：US13642723

申请日：2010-04-23

申请人： Toshiyuki Tokura ,  Katsuhiro Shimizu ,  Kazuyuki Ishida ,  Takashi Mizuochi

发明人： Toshiyuki Tokura ,  Katsuhiro Shimizu ,  Kazuyuki Ishida ,  Takashi Mizuochi

IPC分类号： H04J14/02

CPC分类号： H04J14/0297 ,  H04B10/032 ,  H04J14/0295

摘要： An optical communication system including optical transmission systems each includes a transmission processing unit and a receiving processing unit, wherein the transmission processing unit includes an optical transmission unit that converts electric signals into optical signals, an auxiliary optical transmission unit that converts a part of the electric signals into an optical signal having a wavelength other than wavelengths of the optical signals generated by the optical transmission unit, and outputs the generated optical signal to a different transmission processing unit, and a wavelength multiplexing unit, and the receiving processing unit includes a wavelength demultiplexing unit, an optical receiving unit that converts the optical signals having the wavelengths of the optical signals generated by the optical transmission unit into electric signals, respectively, and an auxiliary optical receiving unit that converts the optical signal having the wavelength of the optical signal generated by the auxiliary optical transmission unit.

摘要翻译： 包括光传输系统的光通信系统各自包括传输处理单元和接收处理单元，其中传输处理单元包括将电信号转换为光信号的光传输单元，将一部分电 信号转换成具有由光传输单元生成的光信号的波长以外的波长的光信号，并将生成的光信号输出到不同的发送处理单元和波长复用单元，并且接收处理单元包括波长解复用 单元，光接收单元，其将具有由光传输单元生成的光信号的波长的光信号分别转换为电信号;以及辅助光接收单元，其将具有光信号波长的光信号 由辅助光传输单元产生。

公开(公告)号：US20120201546A1

公开(公告)日：2012-08-09

申请号：US13498626

申请日：2010-10-19

申请人： Takashi Mizuochi ,  Takashi Sugihara

发明人： Takashi Mizuochi ,  Takashi Sugihara

IPC分类号： H04B10/12 ,  H04B10/04

CPC分类号： H04B10/25137 ,  H04B10/505 ,  H04B10/5162 ,  H04B2210/254

摘要： A pre-equalization optical transmitter includes: an RZ conversion circuit for generating an RZ-type input data sequence based on an NRZ-type input data sequence and a clock that is twice the speed of the NRZ-type input data sequence; a digital filter for generating pre-equalized data by a convolution operation between the RZ-type input data sequence and a desired transfer function corresponding to the wavelength dispersion of an optical fiber transmission path; D/A converters for performing D/A conversion on the pre-equalized data to output analog pre-equalized data; and a vector modulator for modulating light from a laser light source based on the analog pre-equalized data to output an RZ-type optical signal.

摘要翻译： 预均衡光发射机包括：RZ转换电路，用于基于NRZ型输入数据序列和NRZ型输入数据序列的速度的两倍的时钟产生RZ型输入数据序列; 数字滤波器，用于通过RZ型输入数据序列与对应于光纤传输路径的波长色散的期望传输函数之间的卷积运算产生预均衡数据; D / A转换器，用于对预均衡数据执行D / A转换以输出模拟预均衡数据; 以及用于基于所述模拟预均衡数据调制来自激光光源的光的矢量调制器，以输出RZ型光信号。

公开(公告)号：US20110158648A1

公开(公告)日：2011-06-30

申请号：US13060332

申请日：2008-10-15

申请人： Kazuo Kubo ,  Takashi Mizuochi ,  Yuji Akiyama

发明人： Kazuo Kubo ,  Takashi Mizuochi ,  Yuji Akiyama

IPC分类号： H04J14/02

CPC分类号： H04J3/1652 ,  H04B1/74 ,  H04J3/14 ,  H04J14/0295 ,  H04J14/0297

摘要： An optical network system includes a first node that converts input signals of n systems into optical signals having wavelengths different for each of the systems and wavelength-multiplexes and transmits the optical signals and a second node that selects signals of n systems from the wavelength-multiplexed signals and outputs the signals. The first node includes an optical coupler that divides the input signals into operating system signals and redundant signals, TPNDs that convert the operating systems into optical signals, an optical switch that selects standby system signals from the redundant signals, and a TPND that converts the standby system signals into optical signals in a storage mode corresponding to a type of the standby system signals. The second node includes TPNDs that convert the optical signals converted from the operating system signals into signals of a type corresponding to the input signals, a TPND that converts the optical signals of the standby system signals into signals of the type of the input signals in a storage mode corresponding to the standby system signals, and an optical switch that selects an output destination of the signals output from the TPND.

摘要翻译： 光网络系统包括将n个系统的输入信号转换成具有对于每个系统和波长复用的波长不同的波长的第一节点，并且发送光信号，以及从波长多路复用器件中选择n个系统的信号的第二节点 信号并输出​​信号。 第一个节点包括将输入信号分为操作系统信号和冗余信号的光耦合器，将操作系统转换为光信号的TPND，从冗余信号中选择待机系统信号的光开关，以及转换待机状态的TPND 系统以对应于备用系统信号的类型的存储模式将信号转换成光信号。 第二节点包括将从操作系统信号转换的光信号转换为与输入信号相对应的类型的信号的TPND，将待机系统信号的光信号转换为输入信号类型的信号的TPND 对应于备用系统信号的存储模式，以及选择从TPND输出的信号的输出目的地的光开关。

公开(公告)号：US07917833B2

公开(公告)日：2011-03-29

申请号：US11682753

申请日：2007-03-06

申请人： Takashi Mizuochi ,  Naoki Suzuki ,  Seiji Kozaki

发明人： Takashi Mizuochi ,  Naoki Suzuki ,  Seiji Kozaki

IPC分类号： H03M13/00

CPC分类号： H04L1/0041 ,  H03M13/1515 ,  H03M13/17 ,  H03M13/2707 ,  H04L1/0071

摘要： A communication apparatus includes a transmitter and a receiver, wherein the transmitter further includes: an interleaver that rearranges positions of bits of an information frame; an FEC encoder that performs an error correction encoding to the information frame whose bit positions have been rearranged; and a selector that inserts FEC parity into predetermined positions of the information frame, to thereby generate a transmission signal, whereas the receiver includes: a selector that extracts an information frame part and an FEC parity part from a reception signal; an interleaver that rearranges positions of the bits of the information frame part using the same rule as that used at that transmitter side; an FEC decoder that corrects an error of bits rearranged based on the error correction parity part; and a de-interleaver that reproduces an information frame by returning positions of error-corrected bits to original bit positions.

摘要翻译： 通信装置包括发射机和接收机，其中所述发射机还包括：交织器，其重新排列信息帧的比特位置; FEC编码器，其对位位置重新排列的信息帧执行纠错编码; 以及选择器，其将FEC奇偶校验插入信息帧的预定位置，从而生成发送信号，而接收机包括：从接收信号中提取信息帧部分和FEC奇偶校验部分的选择器; 使用与在该发送机侧使用的规则相同的规则来重新排列信息帧部分的位的位置的交织器; FEC解码器，其基于纠错奇偶校验部分校正重新排列的比特的错误; 以及通过将错误校正的比特的位置返回到原始比特位置来再现信息帧的去交织器。

公开(公告)号：US20110013907A1

公开(公告)日：2011-01-20

申请号：US12826129

申请日：2010-06-29

申请人： Takashi SUGIHARA ,  Soichiro Kametani ,  Takashi Mizuochi

发明人： Takashi SUGIHARA ,  Soichiro Kametani ,  Takashi Mizuochi

IPC分类号： H04B17/00

CPC分类号： H04B10/50575 ,  G02F1/0123 ,  G02F1/2255 ,  H04B10/564

摘要： Provided is a multi-value optical transmitter in which a DC bias may be controlled to be stabilized so as to obtain stable optical transmission signal quality in multi-value modulation using a dual-electrode MZ modulator. The multi-value optical transmitter includes: D/A converters for performing D/A conversion on first and second modulation data which are set based on an input data series, so as to generate a first and a second multi-value signal, respectively; a dual-electrode MZ modulator including phase modulators for modulating light from a light source based on the first multi-value signal and the second multi-value signal, so as to combine optical signals from the phase modulators to output the optical multi-value signal; an optical output power monitor for detecting average power of the optical multi-value signal; and a DC bias control unit for controlling a DC bias for the dual-electrode MZ modulator, so as to maximize the average power.

摘要翻译： 提供了一种多值光发射机，其中可以将DC偏压控制为稳定，以便使用双电极MZ调制器在多值调制中获得稳定的光传输信号质量。 多值光发射机包括：D / A转换器，用于对基于输入数据序列设置的第一和第二调制数据执行D / A转换，以分别产生第一和第二多值信号; 一种双电极MZ调制器，包括基于第一多值信号和第二多值信号调制来自光源的光的相位调制器，以便组合来自相位调制器的光信号以输出光学多值信号 ; 用于检测光学多值信号的平均功率的光输出功率监视器; 以及用于控制双电极MZ调制器的DC偏压的DC偏置控制单元，以使平均功率最大化。

公开(公告)号：US20100287450A1

公开(公告)日：2010-11-11

申请号：US12775825

申请日：2010-05-07

申请人： Takashi Sugihara ,  Takashi Mizuochi ,  Kazuo Kubo

发明人： Takashi Sugihara ,  Takashi Mizuochi ,  Kazuo Kubo

IPC分类号： H03M13/45 ,  G06F11/10 ,  H04B10/06

CPC分类号： H04L25/067

摘要： An optical receiving apparatus includes: an A/D converting circuit; a received-signal demodulating circuit that demodulates a received digital signal from the A/D converting circuit into an m-bit received signal; a soft-decision-data generating circuit that generates n-bit (n≦m) soft-decision data based on the m-bit received signal; and an error correcting circuit that performs error correction based on the n-bit soft-decision data and outputs an error-corrected received signal. The soft-decision-data generating circuit generates soft-decision data of n bits (n=p+1) that corresponds to a determination result according to 2n−1 soft-decision thresholds, by using an MSB of the m-bit received signal as hard-decision data, and by using, as reliability information, a result of comparison between a plurality of bits (k bits, where k≦m) on an MSB side of the m-bit received signal and a fixed threshold, or p bits (p≦m−k) selected from (m−k) bits on an LSB side of the m-bit received signal.

摘要翻译： 一种光接收装置，包括：A / D转换电路; 接收信号解调电路，将接收到的数字信号从A / D转换电路解调为m位接收信号; 软判决数据产生电路，其基于所述m位接收信号产生n位（n＆nl; m）个软判决数据; 以及错误校正电路，其基于n位软判决数据进行纠错，并输出纠错接收信号。 软判决数据生成电路通过使用m比特接收信号的MSB，生成与根据2n-1个软判定阈值的判定结果对应的n位（n = p + 1）的软判决数据 作为硬判决数据，并且通过使用作为可靠性信息的m位接收信号的MSB侧的多个比特（k比特，其中k比特，其中k和nlE; m）与固定阈值的比较，或者p 从m位接收信号的LSB侧的（m-k）比特中选择的比特（p＆nlE; m-k）。

公开(公告)号：US07505695B2

公开(公告)日：2009-03-17

申请号：US10508321

申请日：2003-04-23

申请人： Takashi Sugihara ,  Hirofumi Totsuka ,  Takashi Mizuochi

发明人： Takashi Sugihara ,  Hirofumi Totsuka ,  Takashi Mizuochi

IPC分类号： H04B10/06

CPC分类号： H04B10/6971 ,  H04B10/675 ,  H04B10/6972

摘要： The present invention includes an optical band-limiting filter which imposes a band-limitation on an input optical signal, an opto-electric converter which converts the optical signal output from the optical band-limiting filter into an electric signal, a lowpass filter which imposes the band-limitation on the electric signal output from the opto-electric converter, an amplifier which amplifies the output signal of the lowpass filter, and an electric equalizer which performs an equalization processing on a waveform of the electric signal output from the opto-electric converter are provided, and a full width at half maximum of the optical band-limiting filter is set to be equivalent to or smaller than a bit rate frequency of the optical signal.

摘要翻译： 本发明包括对输入光信号施加带限限制的光限幅滤波器，将从光限带滤波器输出的光信号转换为电信号的光电转换器，施加 从光电转换器输出的电信号的频带限制，放大低通滤波器的输出信号的放大器和对从光电输出的电信号的波形进行均衡处理的电均衡器 转换器，并且将光限幅滤波器的半值全宽设置为等于或小于光信号的比特率频率。