公开(公告)号：US07720392B2

公开(公告)日：2010-05-18

申请号：US11274824

申请日：2005-11-16

申请人： Hisao Nakashima ,  Takeshi Hoshida

发明人： Hisao Nakashima ,  Takeshi Hoshida

IPC分类号： H04B10/04 ,  H04B10/00

CPC分类号： G02F1/2255 ,  G02F2001/212 ,  H04B10/505 ,  H04B10/5053 ,  H04B10/50572 ,  H04B10/5561 ,  H04L27/2075 ,  H04L27/2096

摘要： The present invention is directed toward a method for setting a driving voltage of a differential quadrature phase-shift modulator, this method making signal quality superior in response to an individual difference in extinction ratio due to variations in manufacture of a device. To this end, signal quality of differential quadrature phase-shift modulated light output from a differential quadrature phase-shift modulator is acquired. An average amplitude of a first or second driving voltage signal is adjusted according to the signal quality of the thus-acquired differential quadrature phase-shift modulated light.

摘要翻译： 本发明涉及一种用于设定差分正交相移调制器的驱动电压的方法，该方法使得信号质量响应于由于器件的制造变化而导致的消光比的个体差别而优异。 为此，获取从差分正交相移调制器输出的差分正交相移调制光的信号质量。 根据这样获取的差分正交相移调制光的信号质量来调整第一或第二驱动电压信号的平均振幅。

公开(公告)号：US07630650B2

公开(公告)日：2009-12-08

申请号：US11655186

申请日：2007-01-19

申请人： Takeshi Hoshida ,  Hisao Nakashima

发明人： Takeshi Hoshida ,  Hisao Nakashima

IPC分类号： H04B10/12

CPC分类号： H04B10/6971 ,  H04B10/677

摘要： A multi-level modulation receiving device for adaptively compensating for chromatic dispersion and polarization mode dispersion with high precision. Each equalizing filter has at least one variable parameter as a weight therefor and equalizes the waveform of a corresponding channel signal in accordance with an averaged variable parameter value. A signal quality monitor monitors the signal quality of the filter output signal, and a variable parameter value calculator calculates a variable parameter value to be set as the variable parameter, in accordance with the signal quality. A variable parameter averaging unit averages the variable parameter values calculated for respective channels, to generate an averaged variable parameter value, and sends the averaged variable parameter value to the equalizing filters such that the same weight is set in the equalizing filters associated with the n channels.

摘要翻译： 一种用于以高精度自适应地补偿色散和偏振模色散的多电平调制接收装置。 每个均衡滤波器具有至少一个可变参数作为其权重，并根据平均的可变参数值对相应的信道信号的波形进行均衡。 信号质量监视器监视滤波器输出信号的信号质量，并且可变参数值计算器根据信号质量计算要设置为可变参数的可变参数值。 可变参数平均单元对为各个通道计算的可变参数值进行平均，以生成平均的可变参数值，并将平均的可变参数值发送到均衡滤波器，使得在与n个通道相关联的均衡滤波器中设置相同的权重 。

公开(公告)号：US07382979B2

公开(公告)日：2008-06-03

申请号：US11316961

申请日：2005-12-27

申请人： Yuichi Akiyama ,  Takafumi Terahara ,  Takeshi Hoshida ,  Hisao Nakashima

发明人： Yuichi Akiyama ,  Takafumi Terahara ,  Takeshi Hoshida ,  Hisao Nakashima

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

CPC分类号： H04B10/2513

摘要： The present invention discloses a design method of wavelength dispersion compensation of a desired link that is extracted from an optical network, the link including two or more spans, and two or more nodes (N1, N4) that are equipped with an add/drop function, as shown in FIG. 2. All residual dispersion ranges of paths that reach corresponding nodes are adjusted to fall within predetermined tolerable residual dispersion ranges that are set up for all the paths of the link by adjusting wavelength dispersion compensators provided to each of the spans.

摘要翻译： 本发明公开了一种从光网络提取的期望链路的波长色散补偿的设计方法，包括两个或多个跨度的链路，以及两个或更多个节点（N 1，N 4），其配备有添加/ drop功能，如图3所示。 2。 通过调整提供给每个跨度的波长色散补偿器，到达对应节点的路径的所有残余色散范围被调整到落在通过链路的所有路径设置的预定容许残余色散范围内。

公开(公告)号：US09071378B2

公开(公告)日：2015-06-30

申请号：US13447767

申请日：2012-04-16

申请人： Takeshi Hoshida

发明人： Takeshi Hoshida

IPC分类号： H04J14/02 ,  H04B10/077

CPC分类号： H04J14/02 ,  H04B10/0773 ,  H04B10/67 ,  H04B2210/074 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0212 ,  H04J14/0257 ,  H04J14/0258 ,  H04J14/0264 ,  H04J14/0276

摘要： A superimposed signal detection circuit detects a signal superimposed on an optical signal in a WDM system. The superimposed signal detection circuit includes: an optical filter having wavelength-dependent loss to filter a plurality of optical signals on which a corresponding superimposed signal is superimposed by frequency modulation; a photo detector to convert the plurality of optical signals filtered by the optical filter into an electric signal; and a detector to obtain information indicated by the superimposed signal respectively superimposed on the plurality of optical signals from the electric signal obtained by the photo detector.

摘要翻译： 叠加信号检测电路检测叠加在WDM系统中的光信号上的信号。 叠加信号检测电路包括：具有波长依赖性损耗的滤光器，用于对通过频率调制叠加相应叠加信号的多个光信号进行滤波; 光检测器，将由滤光器滤波的多个光信号转换为电信号; 以及检测器，从由光电检测器获得的电信号中获得由叠加在多个光信号上的叠加信号所表示的信息。

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：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：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。

公开(公告)号：US07773283B2

公开(公告)日：2010-08-10

申请号：US12058406

申请日：2008-03-28

申请人： Toshiki Tanaka ,  Hideyuki Miyata ,  Yuichi Akiyama ,  Takeshi Hoshida

发明人： Toshiki Tanaka ,  Hideyuki Miyata ,  Yuichi Akiyama ,  Takeshi Hoshida

IPC分类号： G02B26/00

CPC分类号： G02F1/2255 ,  G02F1/0123 ,  H04B10/505 ,  H04B10/5162 ,  H04B10/5167 ,  H04B10/5561

摘要： According to an aspect of an embodiment, an optical modulation device includes a Mach-Zehnder modulator and a controller. The Mach-Zehnder modulator is supplied a drive signal and a bias voltage. The Mach-Zehnder modulator modulates inputted light on the bases of the drive signal and the bias voltage. The drive signal selectively is superimposes a predetermined frequency signal. The bias voltage selectively is superimposes the predetermined frequency signal. The controller selects a superimposing target which is the drive signal or the bias voltage so as to change modulation formats.

摘要翻译： 根据实施例的一个方面，光调制装置包括马赫 - 曾德调制器和控制器。 马赫曾德尔调制器提供驱动信号和偏置电压。 Mach-Zehnder调制器根据驱动信号和偏置电压调制输入的光。 驱动信号选择性地叠加预定的频率信号。 选择性地将偏置电压叠加在预定频率信号上。 控制器选择作为驱动信号或偏置电压的叠加目标，以便改变调制格式。

公开(公告)号：US07706695B2

公开(公告)日：2010-04-27

申请号：US11476028

申请日：2006-06-28

申请人： Kazuo Hironishi ,  Takeshi Hoshida

发明人： Kazuo Hironishi ,  Takeshi Hoshida

IPC分类号： H04B10/04 ,  H04B10/06

CPC分类号： H04B10/66

摘要： An interferometer comprises a delay element and a phase shift element. The delay element delays an optical DQPSK signal by one-symbol time. The phase shift element shifts the optical DQPSK signal by π/8. A pair of photodiodes converts each of a pair of optical signals output from the interferometer into an electric signal. A photodetector circuit converts differential current obtained by a pair of the photodiodes into voltage and outputs as a detection signal. A first decision circuit outputs one-bit information based on the voltage of the detection signal. A second decision circuit outputs one-bit information based on a squared value of the voltage of the detection signal.

摘要翻译： 干涉仪包括延迟元件和相移元件。 延迟元件将光DQPSK信号延迟一个符号时间。 相移元件将光DQPSK信号移位＆pgr / / 8。 一对光电二极管将从干涉仪输出的一对光信号中的每一个转换为电信号。 光检测器电路将由一对光电二极管获得的差分电流转换为电压和输出作为检测信号。 第一判定电路基于检测信号的电压输出一位信息。 第二判定电路基于检测信号的电压的平方值输出一位信息。