公开(公告)号：US20110274430A1

公开(公告)日：2011-11-10

申请号：US13137024

申请日：2011-07-15

申请人： Hisao Nakashima ,  Takeshi Hoshida ,  Takahito Tanimura ,  Toru Katagiri ,  Shoichiro Oda

发明人： Hisao Nakashima ,  Takeshi Hoshida ,  Takahito Tanimura ,  Toru Katagiri ,  Shoichiro Oda

IPC分类号： H04J14/06

CPC分类号： H04B10/2572 ,  H04B10/532 ,  H04B10/5561

摘要： An optical transmission system, where in an optical transmitter a detection bit having a specific pattern set according to the number of bits to be transmitted within one symbol time, is imparted with respect to a transmission signal in which transmission information has been encoded according to a preset format, and an optical signal generated by modulating light according to the transmission signal is transmitted to a transmission line. In an optical receiver, logic inversion or bit swap of received data is detected and compensated by using the detection bit included in the received signal, a decoding process of the compensated received signal is executed. As a result, when an optical signal capable of transmitting multi-bit information within one symbol time is transferred, it is possible to realize excellent transmission characteristics, by reliably compensating an error in received data caused by the modulation format or the multiplex system of the optical signal.

摘要翻译： 一种光传输系统，其中在光发射机中，根据在一个符号时间内要发送的比特数的数量，具有特定模式集的检测比特，根据发送信号已被编码的发送信号 预设格式和根据发送信号调制光产生的光信号被发送到传输线。 在光接收机中，通过使用包含在接收信号中的检测位来检测和补偿接收数据的逻辑反转或位交换，执行经补偿的接收信号的解码处理。 结果，当在一个符号时间内能够发送多位信息的光信号被传送时，通过可靠地补偿由调制格式或多路复用系统引起的接收数据中的错误，可以实现优异的传输特性 光信号。

公开(公告)号：US20110097085A1

公开(公告)日：2011-04-28

申请号：US12911395

申请日：2010-10-25

申请人： Shoichiro Oda ,  Takeshi Hoshida ,  Takahito Tanimura

发明人： Shoichiro Oda ,  Takeshi Hoshida ,  Takahito Tanimura

IPC分类号： H04J14/08 ,  H04J14/06

CPC分类号： H04B10/5053 ,  H04B10/2569 ,  H04B10/516 ,  H04B2210/254 ,  H04J14/06 ,  H04J14/086

摘要： An optical transmitter includes: a pre-compensator calculating an electrical field of an optical signal subjected to an electronic pre-compensation with respect to an input digital signal; a parallelizer parallelizing the electrical field of the optical signal calculated by the pre-compensator; a plurality of optical modulators modulating an optical signal based on each of parallelized electrical fields of optical signals; and a time-division multiplexer time-division-multiplexing an optical signal output from the plurality of the optical modulators.

摘要翻译： 光发射机包括：预补偿器，用于计算相对于输入数字信号进行电子预补偿的光信号的电场; 平行化由预补偿器计算的光信号的电场的并联器; 多个光调制器，其基于光信号的并行电场中的每一个调制光信号; 以及时分多路复用器，对从多个光调制器输出的光信号进行时分复用。

公开(公告)号：US20100254718A1

公开(公告)日：2010-10-07

申请号：US12719258

申请日：2010-03-08

申请人： Shoichiro ODA ,  Takeshi Hoshida ,  Hisao Nakashima ,  Takahito Tanimura ,  Yuichi Akiyama

发明人： Shoichiro ODA ,  Takeshi Hoshida ,  Hisao Nakashima ,  Takahito Tanimura ,  Yuichi Akiyama

IPC分类号： H04B10/06

CPC分类号： H04B10/614 ,  H04B10/60 ,  H04B10/63

摘要： In-phase signal light and quadrature-phase signal light obtained by mixing input light and local light with each other are converted into digital signals. The quality of a signal to be received is monitored with reference to information obtained through digital signal processing, and the power ratio between the input signal light and the local light that are to be mixed with each other are controlled on the basis of the result of the monitoring.

摘要翻译： 通过将输入光和局部光彼此混合而获得的同相信号光和正交相位信号光被转换为数字信号。 参照通过数字信号处理获得的信息来监视要接收的信号的质量，并且基于将要混合的输入信号光和本地光之间的功率比来控制 监控。

公开(公告)号：US20100111531A1

公开(公告)日：2010-05-06

申请号：US12581413

申请日：2009-10-19

申请人： Takahito Tanimura ,  Takeshi Hoshida ,  Hisao Nakashima

发明人： Takahito Tanimura ,  Takeshi Hoshida ,  Hisao Nakashima

IPC分类号： H04B10/00 ,  H04J14/06

CPC分类号： H04B10/541 ,  H04B10/5055 ,  H04B10/532 ,  H04B10/60 ,  H04B2210/254

摘要： An optical transmission/reception system includes a modulator for modulating light based on data to output signal light; a transmission-side signal processor performing transmission-side digital signal processing which imparts a polarization change to the signal light by the optical modulation with respect to an input signal; an optical transmitter in which the modulator performs the optical modulation based on the input signal subjected to the transmission-side digital signal processing in the transmission-side signal processor; and an optical receiver including a converter converting the signal light inputted from the optical transmitter via a transmission path to a digital electric signal for each polarization component, and a reception-side signal processor performing reception-side digital signal processing which imparts a polarization change having a property substantially inverse to a property of the polarization change in the transmission-side signal processor with respect to the digital electric signal from the converter.

摘要翻译： 光发送/接收系统包括：调制器，用于根据数据调制光以输出信号光; 执行发送侧数字信号处理的发送侧信号处理器，其相对于输入信号通过光调制而赋予信号光的偏振变化; 光发送器，其中调制器基于在发送侧信号处理器中进行发送侧数字信号处理的输入信号执行光调制; 以及光接收器，其包括将从所述光发送器输入的信号光经由传输路径转换为每个偏振分量的数字电信号的转换器，以及执行接收侧数字信号处理的接收侧信号处理器， 与传输侧信号处理器相对于来自转换器的数字电信号的偏振变化的特性基本上相反的特性。

公开(公告)号：US20090214201A1

公开(公告)日：2009-08-27

申请号：US12236028

申请日：2008-09-23

申请人： Shoichiro Oda ,  Takeshi Hoshida ,  Hisao Nakashima ,  Takahito Tanimura

发明人： Shoichiro Oda ,  Takeshi Hoshida ,  Hisao Nakashima ,  Takahito Tanimura

IPC分类号： H04B10/08

CPC分类号： H04B10/6971 ,  H04B10/0795

摘要： An optical reception circuit generates optical electric field data by performing coherent reception of an optical signal transmitted via an optical fiber transmission line. An FIR filter filters the optical electric field data so that the optical signal is equalized. A quality monitor unit calculates the average value and the standard deviation value of the amplitude of the optical signal on the basis of the equalized optical electric field data, and further calculates an optical signal-to-noise ratio on the basis of the calculated values.

摘要翻译： 光接收电路通过对通过光纤传输线传输的光信号进行相干接收来产生光电场数据。 FIR滤波器对光电场数据进行滤波，使光信号相等。 质量监视器单元基于均衡的光电场数据计算光信号的幅度的平均值和标准偏差值，并且还基于计算值来计算光信噪比。

公开(公告)号：US20080198051A1

公开(公告)日：2008-08-21

申请号：US12068234

申请日：2008-02-04

申请人： Takahito Tanimura ,  Hisao Nakashima ,  Takeshi Hoshida

发明人： Takahito Tanimura ,  Hisao Nakashima ,  Takeshi Hoshida

IPC分类号： H03M1/00

CPC分类号： H04L7/007 ,  H03M1/1255 ,  H04B10/697

摘要： An optical receiving device of the present invention receives optical signals from an optical transmitting device which uses a modulation format wherein an optical intensity waveform of each symbol is return-to-zero (RZ) pulse, and converts the received optical signals into digital signals by a conversion process of an analog to digital (AD) converter. A control-value calculating unit subsequent to the AD converter digitally processes the digital signals, retrieves an absolute value of the digital signals or a value corresponding one-to-one with the absolute value of the digital signals, estimates errors from an appropriate timing of a sampling timing in the AD converter based on the absolute value of the digital signals or the value corresponding one-to-one with the absolute value of the digital signals, and calculates a control value controlling the sampling timing based on the estimated errors. Based on the control value, a phase of a pulse regulating the sampling timing of AD conversion can be compensated.

摘要翻译： 本发明的光接收装置接收来自光发送装置的光信号，该光发送装置采用调制格式，其中每个符号的光强度波形为归零（RZ）脉冲，并将接收到的光信号转换成数字信号 模数转换器（AD）转换器的转换过程。 AD转换器之后的控制值计算单元对数字信号进行数字处理，用数字信号的绝对值检索数字信号的绝对值或与之对应的值，从适当的定时估计误差 基于数字信号的绝对值的AD转换器中的采样定时或与数字信号的绝对值一一对应的值，并且基于估计的误差来计算控制采样定时的控制值。 基于控制值，可以补偿调节AD转换的采样定时的脉冲的相位。

公开(公告)号：US08849128B2

公开(公告)日：2014-09-30

申请号：US13413874

申请日：2012-03-07

申请人： Shoichiro Oda ,  Takeshi Hoshida ,  Toshiki Tanaka ,  Takahito Tanimura ,  Tomoo Takahara

发明人： Shoichiro Oda ,  Takeshi Hoshida ,  Toshiki Tanaka ,  Takahito Tanimura ,  Tomoo Takahara

IPC分类号： H04B10/04 ,  H04J14/02 ,  H04B10/548 ,  H04B10/50 ,  H01S5/00 ,  H01S5/40

CPC分类号： H04B10/506 ,  H01S5/005 ,  H01S5/0085 ,  H01S5/4087 ,  H04B10/548

摘要： Light output from a seed light source generation unit that outputs continuous light having a single frequency or a plurality of frequencies is input by a multi-wavelength light source to an optical circulation unit, and light having a plurality of frequencies that is frequency-synchronized with seed light output from the seed light source generation unit is generated. The optical circulation unit is provided with an optical frequency shifter to shift light frequencies, and includes a circulation circuit to return output from the optical frequency shifter to the input side. On a circulation path, an optical spectral shaper capable of adjusting an optical amount of attenuation for each frequency unit is provided so that optical amount of attenuations are adjusted, and thereby the number and the like of optical frequencies output from the optical circulation unit are changed.

摘要翻译： 从多光波长光源输入输出具有单一频率或多个频率的连续光的种子光源生成部的光输出到光循环装置，具有频率同步的多个频率的光 产生从种子光源生成单元输出的种子光。 光学循环单元设置有用于移动光频率的光学移频器，并且包括循环电路，以将输出从光学移频器返回到输入侧。 在循环路径上，设置能够调整每个频率单位的光衰减量的光谱整形器，从而调整光衰减量，从而使从光循环单元输出的光频数等变化 。

公开(公告)号：US08744276B2

公开(公告)日：2014-06-03

申请号：US12408176

申请日：2009-03-20

申请人： Hisao Nakashima ,  Takeshi Hoshida ,  Takahito Tanimura ,  Lei Li ,  Ling Liu

发明人： Hisao Nakashima ,  Takeshi Hoshida ,  Takahito Tanimura ,  Lei Li ,  Ling Liu

IPC分类号： H04B10/00

CPC分类号： H04B10/6165 ,  H04B10/61 ,  H04B10/611 ,  H04L7/0054 ,  H04L27/223

摘要： An optical receiving apparatus includes a combining unit that combines signal light and reference light; a optoelectric converting unit that converts, into electrical signals, two or more optical signals that enable reconstruction of a complex electric field signal of the signal light obtained by the combining unit; and a sampling clock generating unit that generates a sampling clock that has a frequency preset based on a symbol rate of the signal light and is asynchronous with the signal light. The optical receiving apparatus further includes a digital converting unit that samples at the frequency of the sampling clock signal, an electrical signal obtained by the optoelectric converting unit and converts the electrical signal into a digital signal; and a digital signal processing unit that demodulates a received signal based on a complex digital signal obtained from the digital signal obtained by the digital converting unit.

摘要翻译： 光接收装置包括组合信号光和参考光的组合单元; 光电转换单元，其将电信号转换成能够重构由组合单元获得的信号光的复电场信号的两个或更多个光信号; 以及采样时钟产生单元，其生成具有基于信号光的符号率预设的频率并且与信号光异步的采样时钟。 光接收装置还包括数字转换单元，以采样时钟信号的频率采样，由光电转换单元获得的电信号，并将该电信号转换为数字信号; 以及数字信号处理单元，其基于从由数字转换单元获得的数字信号获得的复数数字信号来解调接收信号。

公开(公告)号：US08447186B2

公开(公告)日：2013-05-21

申请号：US12543154

申请日：2009-08-18

申请人： Takahito Tanimura ,  Takeshi Hoshida ,  Hisao Nakashima ,  Shoichiro Oda

发明人： Takahito Tanimura ,  Takeshi Hoshida ,  Hisao Nakashima ,  Shoichiro Oda

IPC分类号： H04B10/12

CPC分类号： H04J14/06 ,  H03F3/08 ,  H04B1/12 ,  H04B10/25133 ,  H04B10/697 ,  H04B2210/252

摘要： A distortion compensator, an optical receiver and a transmission system including an operation selectively compensating for linear waveform distortion exerted on an optical signal via a plurality of distortion compensators and compensating for nonlinear waveform distortion exerted on the optical signal using nonlinear distortion compensators.

摘要翻译： 失真补偿器，光接收器和传输系统，其包括经由多个失真补偿器选择性地补偿施加在光信号上的线性波形失真的操作，并且使用非线性失真补偿器补偿施加在光信号上的非线性波形失真。

公开(公告)号：US07602322B2

公开(公告)日：2009-10-13

申请号：US12068234

申请日：2008-02-04

申请人： Takahito Tanimura ,  Hisao Nakashima ,  Takeshi Hoshida

发明人： Takahito Tanimura ,  Hisao Nakashima ,  Takeshi Hoshida

IPC分类号： H03M1/06

CPC分类号： H04L7/007 ,  H03M1/1255 ,  H04B10/697

摘要： An optical receiving device of the present invention receives optical signals from an optical transmitting device which uses a modulation format wherein an optical intensity waveform of each symbol is return-to-zero (RZ) pulse, and converts the received optical signals into digital signals by a conversion process of an analog to digital (AD) converter. A control-value calculating unit subsequent to the AD converter digitally processes the digital signals, retrieves an absolute value of the digital signals or a value corresponding one-to-one with the absolute value of the digital signals, estimates errors from an appropriate timing of a sampling timing in the AD converter based on the absolute value of the digital signals or the value corresponding one-to-one with the absolute value of the digital signals, and calculates a control value controlling the sampling timing based on the estimated errors. Based on the control value, a phase of a pulse regulating the sampling timing of AD conversion can be compensated.

摘要翻译： 本发明的光接收装置接收来自光发送装置的光信号，该光发送装置采用调制格式，其中每个符号的光强度波形为归零（RZ）脉冲，并将接收到的光信号转换成数字信号 模数转换器（AD）转换器的转换过程。 AD转换器之后的控制值计算单元对数字信号进行数字处理，用数字信号的绝对值检索数字信号的绝对值或与之对应的值，从适当的定时估计误差 基于数字信号的绝对值的AD转换器中的采样定时或与数字信号的绝对值一一对应的值，并且基于估计的误差来计算控制采样定时的控制值。 基于控制值，可以补偿调节AD转换的采样定时的脉冲的相位。