公开(公告)号：US08731411B2

公开(公告)日：2014-05-20

申请号：US13064567

申请日：2011-03-31

申请人： Shoichiro Oda ,  Takeshi Hoshida ,  Toshiki Tanaka ,  Hiroyuki Irie ,  Hiroshi Nakamoto

发明人： Shoichiro Oda ,  Takeshi Hoshida ,  Toshiki Tanaka ,  Hiroyuki Irie ,  Hiroshi Nakamoto

IPC分类号： H04B10/00

CPC分类号： H04B10/2572 ,  H04B10/61 ,  H04B10/611 ,  H04B10/614 ,  H04B10/6151 ,  H04B10/6163

摘要： A polarization fluctuation compensation device, when WDM light received by, for example, an optical reception device includes a polarization scrambled optical signal and a non-polarization scrambled optical signal, collects information related to whether optical signals having respective wavelengths are polarization scrambled, obtains a target value of control parameters which are different from each other, according to the speed of polarization fluctuations in the non-polarization scrambled optical signal based on the collected information, and performs reception processing of the non-polarization scrambled optical signal by using a control parameter set as the target value. As a result, an influence of fast polarization fluctuations generated resulting from an interaction between optical signals having respective wavelengths can be reliably compensated for, thereby enabling to realize excellent reception characteristics.

摘要翻译： 一种偏振波动补偿装置，当由例如光接收装置接收的WDM光包括偏振加密光信号和非偏振加扰光信号时，收集与具有各波长的光信号是否被偏振加密有关的信息，获得 根据所收集的信息，根据非偏振加扰光信号中的偏振波动速度，彼此不同的控制参数的目标值，并使用控制参数进行非偏振加扰光信号的接收处理 设为目标值。 结果，可以可靠地补偿由具有各个波长的光信号之间的相互作用产生的快速极化波动的影响，从而能够实现良好的接收特性。

公开(公告)号：US08660438B2

公开(公告)日：2014-02-25

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：US08447190B2

公开(公告)日：2013-05-21

申请号：US12697202

申请日：2010-01-29

申请人： Takahito Tanimura ,  Takeshi Hoshida ,  Hisao Nakashima ,  Kazunari Shiota ,  Kiichi Sugitani

发明人： Takahito Tanimura ,  Takeshi Hoshida ,  Hisao Nakashima ,  Kazunari Shiota ,  Kiichi Sugitani

IPC分类号： H04B10/06 ,  H04B10/08 ,  H04B10/12 ,  H04B10/00 ,  H04J14/02

CPC分类号： H04B10/6971 ,  H04B10/25133 ,  H04B10/616 ,  H04B10/6161 ,  H04B2210/252

摘要： A distortion compensating apparatus which compensates for distortion in a waveform of a received light signal through a digital signal processing includes a plurality of fixed amount compensators which compensate for the distortion in the waveform at respective given compensating amounts. The combination of operating states of the plurality of fixed amount compensators is changed by on/off switching of each of the plurality of fixed amount compensators, and the plurality of fixed amount compensators are cascaded.

摘要翻译： 通过数字信号处理补偿接收的光信号的波形中的失真的失真补偿装置包括多个固定量补偿器，其补偿各个给定补偿量处的波形失真。 通过多个固定量补偿器中的每一个的开/关切换来改变多个固定量补偿器的操作状态的组合，并且多个固定量补偿器被级联。

公开(公告)号：US08406638B2

公开(公告)日：2013-03-26

申请号：US12219937

申请日：2008-07-30

申请人： Takeshi Hoshida

发明人： Takeshi Hoshida

IPC分类号： H04B10/06

CPC分类号： H04B10/6151 ,  H04B10/60 ,  H04B10/61 ,  H04B10/611 ,  H04B10/614 ,  H04B10/6165

摘要： In order to reduce the size and simplify the structure of a coherent light receiver, the coherent light receiver includes an optical mixer for coupling local oscillator light and reception signal light, a photoelectric converter for photoelectrically converting light coupled in the optical mixer, a reception data processing unit for extracting reception data included in the reception signal light through digital signal processing for processing the coupled signal converted into an electrical signal by the photoelectric converter, based on a first clock, and a modulator for modulating the local oscillator light or the reception signal light inputted to the optical mixer respectively, by using a clock phase-synchronized with the first clock used for the digital signal processing in the reception data processing unit.

公开(公告)号：US08374512B2

公开(公告)日：2013-02-12

申请号：US12219938

申请日：2008-07-30

申请人： Zhenning Tao ,  Huijian Zhang ,  Takeshi Hoshida ,  Lei Li

发明人： Zhenning Tao ,  Huijian Zhang ,  Takeshi Hoshida ,  Lei Li

IPC分类号： H04B10/06 ,  H04B10/08

CPC分类号： H04B10/6164 ,  H04B10/61 ,  H04B10/613 ,  H04B10/63

摘要： The present invention provides a frequency offset monitoring device and an optical coherent receiver. A low speed frequency offset monitoring device comprises a signal speed lowering section, for lowering the speed of an inputted signal and outputting the speed lowered signal, and a frequency offset monitor, for monitoring frequency offset of the speed lowered signal outputted by the signal speed lowering section.

公开(公告)号：US20120243880A1

公开(公告)日：2012-09-27

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 ,  F21V9/00

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：US20120213532A1

公开(公告)日：2012-08-23

申请号：US13325681

申请日：2011-12-14

申请人： Kazuo Hironishi ,  Takeshi Hoshida

发明人： Kazuo Hironishi ,  Takeshi Hoshida

IPC分类号： H04B10/06

CPC分类号： H04B10/6161 ,  H04B10/6165

摘要： An optical receiver includes a splitter that splits a local oscillator lightwave into a first local oscillator lightwave and a second local oscillator lightwave; a measurement unit that measures phase variation of the first local oscillator lightwave; a receiving unit that receives a signal lightwave and the second local oscillator lightwave and mixes these lightwaves and converts the mixed lightwaves into digital signal; a dispersion compensator that reduces chromatic dispersion of the digital signal; a phase processing unit that rotates phase of the dispersion-reduced signal based on the phase variation; and a discriminating unit that discriminates the phase-rotated signal.

摘要翻译： 光接收机包括分离器，其将本地振荡器光波分裂成第一本地振荡器光波和第二本地振荡器光波; 测量单元，其测量第一本地振荡器光波的相位变化; 接收单元，接收信号光波和第二本地振荡器光波，并混合这些光波并将混合光波转换成数字信号; 一种降低数字信号色散的色散补偿器; 相位处理单元，其基于所述相位变化来旋转所述色散减小信号的相位; 以及鉴别单元，其识别相位旋转信号。

公开(公告)号：US20120141130A1

公开(公告)日：2012-06-07

申请号：US13267909

申请日：2011-10-07

申请人： Hisao Nakashima ,  Takeshi Hoshida

发明人： Hisao Nakashima ,  Takeshi Hoshida

IPC分类号： H04B10/04 ,  H04J14/02

CPC分类号： H04B10/505 ,  H04B10/572

摘要： The optical transmitter includes a light source; a signal processor; an optical modulator that modulates output light from the light source in accordance with a transmitting signal subjected to digital signal processing in the signal processor and outputs the modulated light as a light signal to a transmission path; and a control circuit that controls a carrier-wave frequency of the light signal output from the optical modulator, the signal processor including a mapping circuit that maps the transmitting signal to electric-field information according to a modulating scheme, and a phase rotating circuit that provides a phase rotation having a constant cycle to an electric-field phase of the electric-field information to which the mapping circuit maps the transmitting signal, the control circuit controlling the cycle of the phase rotation that the phase rotating circuit provides and thereby controlling the carrier-wave frequency of the light signal output from the optical modulator.

摘要翻译： 光发射机包括光源; 一个信号处理器; 光调制器，其根据在信号处理器中进行数字信号处理的发送信号调制来自光源的输出光，并将调制光作为光信号输出到传输路径; 以及控制电路，其控制从所述光调制器输出的光信号的载波频率，所述信号处理器包括映射电路，所述映射电路根据调制方案将所述发送信号映射到电场信息;以及相位旋转电路， 向映射电路映射发送信号的电场信息的电场相位提供恒定周期的相位旋转，控制电路控制相位旋转电路提供的相位旋转的周期，从而控制 从光调制器输出的光信号的载波频率。

公开(公告)号：US20110170881A1

公开(公告)日：2011-07-14

申请号：US12977979

申请日：2010-12-23

申请人： Hisao NAKASHIMA ,  Takeshi Hoshida

发明人： Hisao NAKASHIMA ,  Takeshi Hoshida

IPC分类号： H04B10/06

CPC分类号： H04B10/6165 ,  H04B10/6161 ,  H04B10/6162 ,  H04B10/6164 ,  H04B10/697 ,  H04L7/0335

摘要： A light receiving device includes: a converter digitalizing an analog signal with a given sampling clock frequency, the analog signal being obtained through a photoelectric conversion of a received optical signal; a plurality of fixed distortion compensators compensating an output signal of the converter for waveform distortion with a fixed compensation amount that is different from each other; a plurality of phase shift detector circuits detecting a sampling phase shift from an output signal of the plurality of the fixed distortion compensators; a phase-adjusting-amount determiner determining a sampling phase adjusting amount with use of an output signal of the plurality of the phase shift detector circuits; and a phase adjusting circuit reducing a phase difference between the sampling clock frequency and the received optical signal based on a determination result of the phase-adjusting-amount determiner.

摘要翻译： 光接收装置包括：转换器，其以给定的采样时钟频率对模拟信号进行数字化，模拟信号通过光接收光信号获得; 多个固定失真补偿器，其以相互不同的固定补偿量补偿所述转换器的输出信号的波形失真; 多个相移检测器电路，从多个固定失真补偿器的输出信号中检测采样相移; 相位调整量确定器，利用多个相移检测器电路的输出信号确定采样相位调整量; 以及相位调整电路，根据相位调整量判定器的判定结果，减小采样时钟频率与接收到的光信号之间的相位差。

公开(公告)号：US07869719B2

公开(公告)日：2011-01-11

申请号：US12401674

申请日：2009-03-11

申请人： Takeshi Hoshida ,  Seemant Choudhary

发明人： Takeshi Hoshida ,  Seemant Choudhary

IPC分类号： H04B10/06 ,  H04B10/00

CPC分类号： H04B10/69 ,  H04B10/67 ,  H04B10/676 ,  H04B10/677

摘要： A method for receiving an optical signal is included where an ingress signal is split into a first portion and a second portion. A relative delay is induced between the first portion and the second portion, which are optically interfered to generate at least one interfered signal. Quality criteria of a monitored signal at least based on the at least one interfered signal is monitored so that a relative delay based in the quality criteria may be adjusted.

摘要翻译： 包括用于接收光信号的方法，其中入口信号被分成第一部分和第二部分。 在第一部分和第二部分之间产生相对的延迟，其被光学干涉以产生至少一个干扰信号。 至少基于至少一个干扰信号的监视信号的质量标准被监控，使得可以调整基于质量标准的相对延迟。