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。

公开(公告)号：US20100054759A1

公开(公告)日：2010-03-04

申请号：US12458104

申请日：2009-06-30

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： H04B10/06

CPC分类号： H04L25/03038 ,  H04B10/6971 ,  H04L2025/03566

摘要： In a digital signal processing circuit of an optical receiver applicable to this method for electric power supply control, tap coefficients of a filter used in a waveform equalization section are calculated in a tap coefficient calculating section, based on a state of an optical fiber transmission line. Then, among the calculated tap coefficients, a tap coefficient for which an absolute value is less than a previously determined threshold is determined, and electric power supply to a circuit part of a filter corresponding to the tap coefficient is stopped. As a result, for an optical receiver that performs digital signal processing, it is possible to reduce the power consumption, while realizing waveform equalization at a high accuracy.

摘要翻译： 在适用于该电力供给控制方法的光接收机的数字信号处理电路中，根据光纤传输线的状态，在抽头系数计算部中计算波形均衡部中使用的滤波器的抽头系数 。 然后，在所计算的抽头系数中，确定绝对值小于先前确定的阈值的抽头系数，并且停止对与抽头系数相对应的滤波器的电路部分的电力供应。 结果，对于执行数字信号处理的光接收机，可以在高精度地实现波形均衡的同时降低功耗。

公开(公告)号：US20100040383A1

公开(公告)日：2010-02-18

申请号：US12565812

申请日：2009-09-24

申请人： Kazuo Hironishi ,  Takeshi Hoshida

发明人： Kazuo Hironishi ,  Takeshi Hoshida

IPC分类号： H04B10/06

CPC分类号： H04L27/223 ,  H04B10/66 ,  H04B10/677

摘要： A first optical splitter splits an input optical signal and outputs it to first and second optical paths. A second optical splitter outputs the optical signal from the first optical path to third and fourth optical paths. A third optical splitter outputs the optical signal from the second optical path to fifth and sixth optical paths. In the second optical path, 1-symbol delay element and π/4 phase shifter element are configured. In the fourth optical path, π/2 phase shifter element is configured. First and second adjuster circuits adjust the optical path length of the second and the fourth optical paths, respectively, by temperature control. A first optical coupler couples optical signals transmitted via the third and the fifth optical paths. A second optical coupler couples optical signals transmitted via the fourth and the sixth optical paths. Photodetectors convert the optical signals from the optical couplers into electrical signals.

摘要翻译： 第一光分路器分离输入光信号并将其输出到第一和第二光路。 第二光分路器将光信号从第一光路输出到第三和第四光路。 第三光分路器将光信号从第二光路输出到第五和第六光路。 在第二光路中配置1符号延迟元件和＆pgr / 4移相器元件。 在第四光路中配置＆pgr / 2移相器元件。 第一和第二调节器电路通过温度控制分别调节第二和第四光路的光路长度。 第一光耦合器耦合经由第三和第五光路传输的光信号。 第二光耦合器耦合经由第四和第六光路传输的光信号。 光电检测器将光耦合器的光信号转换为电信号。

公开(公告)号：US20080297270A1

公开(公告)日：2008-12-04

申请号：US12216270

申请日：2008-07-02

申请人： Tomoo Takahara ,  Takeshi Hoshida ,  Hisao Nakashima

发明人： Tomoo Takahara ,  Takeshi Hoshida ,  Hisao Nakashima

IPC分类号： H03C3/00

CPC分类号： G02F1/225 ,  G02F2001/212 ,  G02F2201/18 ,  G02F2203/50 ,  H04B10/505 ,  H04B10/5561

摘要： A drive signal generation unit generates first and second drive signals for driving first and second phase modulators of a DQPSK optical modulator. First and second regeneration circuits regenerate the first and second drive signals with respect to clock signals. The first and second phase modulators are driven by the regenerated first and second drive signals. The amplitude of the first drive signal is adjusted by a first attenuator. The clock signal for the second regeneration circuit is applied after attenuated by a second attenuator. The delay time caused by the first attenuator is the same as the delay time caused by the second attenuator.

摘要翻译： 驱动信号生成单元生成用于驱动DQPSK光调制器的第一和第二相位调制器的第一和第二驱动信号。 第一和第二再生电路相对于时钟信号再生第一和第二驱动信号。 第一和第二相位调制器由再生的第一和第二驱动信号驱动。 第一驱动信号的振幅由第一衰减器调节。 第二再生电路的时钟信号由第二衰减器衰减后施加。 由第一衰减器引起的延迟时间与由第二衰减器引起的延迟时间相同。

公开(公告)号：US20080080805A1

公开(公告)日：2008-04-03

申请号：US11882062

申请日：2007-07-30

申请人： Hisao Nakashima ,  Takeshi Hoshida

发明人： Hisao Nakashima ,  Takeshi Hoshida

IPC分类号： G02B6/00

CPC分类号： H04L7/0075 ,  G02B6/278 ,  H04B10/2569

摘要： In a PMD compensator of the present invention, a signal light input to an input terminal is supplied to a polarizer via a polarization controller; a part of polarized light transmitted through the polarizer is branched by an optical coupler as a monitor light; the monitor light is converted into a electrical signal by a photodiode; a clock corresponding to a RZ clock frequency of the signal light is extracted from the electrical signal using a band-pass filter, to thereby monitor the intensity thereof; and the polarization controller is feedback controlled by a PC control section so that the monitored intensity of the clock becomes maximum. As a result, a miniaturized and low-cost PMD compensator which can reliably compensate for first-order polarization mode dispersion of a RZ-pulsed signal light is provided.

摘要翻译： 在本发明的PMD补偿器中，输入到输入端子的信号光通过偏振控制器提供给偏振器; 通过偏振器的偏振光的一部分由作为监视光的光耦合器分支; 监视器光被光电二极管转换成电信号; 使用带通滤波器从电信号中提取对应于信号光的RZ时钟频率的时钟，从而监视其强度; 并且偏振控制器由PC控制部分反馈控制，使得监视的时钟强度变为最大。 因此，提供了可以可靠地补偿RZ脉冲信号光的一阶偏振模色散的小型化和低成本的PMD补偿器。

公开(公告)号：US07200344B1

公开(公告)日：2007-04-03

申请号：US09853318

申请日：2001-05-10

申请人： Takeshi Hoshida

发明人： Takeshi Hoshida

IPC分类号： H04B10/06

CPC分类号： H04B10/69 ,  H04B10/0779 ,  H04B10/67 ,  H04J14/02

摘要： A method and system for transmitting information in a wavelength division multiplex (WDM) or other suitable multichannel optical communication system includes receiving a multichannel signal having a symbol rate and comprising a plurality of non-intensity modulated optical information signals. The non-intensity modulated optical information signals have a minimum channel spacing comprising a multiple of the symbol rate within 0.4 to 0.6 of an integer. The non-intensity modulated optical information signals are separated from the multichannel signal and each converted into an intensity modulated optical information signal using an asymmetric interferometer. A data signal is recovered from the intensity modulated optical information signal.

摘要翻译： 用于在波分多路复用（WDM）或其他合适的多信道光通信系统中发送信息的方法和系统包括接收具有符号率并包括多个非强度调制光信息信号的多信道信号。 非强度调制光信息信号具有最小信道间隔，其包括整数的0.4至0.6之内的符号率的倍数。 非强度调制光信息信号与多信道信号分离，并使用非对称干涉仪将其转换成强度调制光信息信号。 从强度调制光信息信号中恢复数据信号。

公开(公告)号：US20060222377A1

公开(公告)日：2006-10-05

申请号：US11391414

申请日：2006-03-29

申请人： Takeshi Hoshida ,  Nobuhiro Fukushima

发明人： Takeshi Hoshida ,  Nobuhiro Fukushima

IPC分类号： H04B10/06

CPC分类号： H04L27/22 ,  H04B10/60

摘要： A small size and low cost optical receiving apparatus, which can stably demodulate the signal, lights in accordance with the differential M-phase shift keying (DMPSK) system. An optical receiving apparatus comprises a light branching unit for branching the differential M-phase shift keying signal beam into four signal light beams, a delay adjusting unit giving a delay time difference of one symbol between a first signal light beam and a second signal light beam and between a third signal light beam and a fourth signal light beam, a demodulating unit for outputting a least two demodulated light signals through respective interferences between the first signal light beam and the second signal light beam, and between the third signal light beam and the fourth signal light beam on one plane which is not parallel to any signal light beam, and at least two optical detectors for converting at least two light signals into electrical signals.

摘要翻译： 可以稳定地解调信号的小尺寸和低成本的光接收装置根据差分M相移键控（DMPSK）系统点亮。 光接收装置包括用于将差分M相移键控信号光束分支为四个信号光束的光分支单元，延迟调整单元，其给出第一信号光束和第二信号光束之间的一个符号的延迟时间差 并且在第三信号光束和第四信号光束之间，解调单元，用于通过第一信号光束和第二信号光束之间的相应干扰以及第三信号光束和第二信号光束之间的相应干扰输出至少两个解调光信号; 在不平行于任何信号光束的一个平面上的第四信号光束，以及用于将至少两个光信号转换为电信号的至少两个光学检测器。

公开(公告)号：US20060171718A1

公开(公告)日：2006-08-03

申请号：US11117429

申请日：2005-04-29

申请人： Takeshi Hoshida

发明人： Takeshi Hoshida

IPC分类号： H04B10/00

CPC分类号： H04B10/61 ,  H04B10/532

摘要： In an optical receiver according to the present invention, an input signal light subjected to the differential quadrature phase shift keying (DQPSK) is incident on a PANDA type fiber in a linearly polarized state by 45°, so that a delay time difference corresponding to one symbol is generated between orthogonal polarization components in the DQPSK signal light, and then, the signal light is branched by a half mirror into two, to be sent to first and second paths respectively, thereby giving, by a ¼ wave plate disposed on one of the paths, a relative birefringent amount difference of π/2 between the lights propagated through the respective paths. Then, each of the lights propagated through the first and second paths is separated into two orthogonal polarization components by a polarization beam splitter, and the respective polarization components are received by a differential reception circuit so that in-phase components and quadrature components in the DQPSK signal are demodulated. Thus, a small sized and low cost optical receiver capable of stably demodulating the DQPSK signal is provided.

公开(公告)号：US20050117908A1

公开(公告)日：2005-06-02

申请号：US10726157

申请日：2003-12-02

申请人： Gerardo Castanon ,  Remi Pecqueur ,  Takeshi Hoshida

发明人： Gerardo Castanon ,  Remi Pecqueur ,  Takeshi Hoshida

IPC分类号： H04B10/02 ,  H04J14/00 ,  H04J14/02 ,  H04Q11/00 ,  G02B6/26 ,  G02B6/42

CPC分类号： H04Q11/0005 ,  H04Q2011/0015

摘要： An optical cross-connect includes multiple input ports that each receive an optical input signal and multiple output ports that each output an optical output signal. The optical cross-connect also includes a distributing amplifier associated with each input port that generates multiple copies of the input signal received at the associated input port. Furthermore, the optical cross-connect includes multiple filter units that receive a copy of one or more of the input signals from one or more of the distributing amplifiers and forward traffic in selected channels of one or more of the received copies. In addition, the optical cross-connect includes a combining amplifier associated with each output port. Each combining amplifier receives the traffic in one or more of the channels forwarded by one or more of the filter units and combines the received traffic into an output signal to be output from the associated output port. The optical cross-connect further includes one or more regeneration modules that each regenerate the traffic in one or more channels of one or more of the input signals.

摘要翻译： 光交叉连接包括多个输入端口，每个输入端口接收光输入信号和多个输出端口，每个输出端口输出光输出信号。 光交叉连接还包括与每个输入端口相关联的分配放大器，其产生在相关联的输入端口处接收的输入信号的多个副本。 此外，光交叉连接包括多个滤波器单元，其接收来自一个或多个分配放大器的一个或多个输入信号的副本以及一个或多个所接收副本的所选频道中的前向业务。 此外，光交叉连接包括与每个输出端口相关联的组合放大器。 每个组合放大器接收由一个或多个滤波器单元转发的一个或多个信道中的业务，并将接收到的业务组合成输出信号以从相关联的输出端口输出。 光学交叉连接还包括一个或多个再生模块，每个再生模块在一个或多个输入信号的一个或多个通道中重新生成流量。

公开(公告)号：US08935115B2

公开(公告)日：2015-01-13

申请号：US13412176

申请日：2012-03-05

申请人： Weizhen Yan ,  Zhenning Tao ,  Takeshi Hoshida

发明人： Weizhen Yan ,  Zhenning Tao ,  Takeshi Hoshida

IPC分类号： G06F19/00 ,  H04B10/255 ,  H04B10/69

CPC分类号： H04B10/255 ,  H04B10/6971

摘要： A method and apparatus for compensating nonlinear damage are disclosed. The method for compensating nonlinear damage, including: determining an additive parameter indicating an amount of nonlinear damage based on a plurality of sampled signal sets among which a sampling time of an input signal varies according to different time; and subtracting the additive parameter from the input signal.

摘要翻译： 公开了一种用于补偿非线性损伤的方法和装置。 一种用于补偿非线性损伤的方法，包括：基于多个采样信号集确定表示非线性损伤量的附加参数，其中输入信号的采样时间根据不同的时间而变化; 并从输入信号中减去加法参数。