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21. 发明申请

US20100303474A1 DIGITAL COHERENT OPTICAL RECEIVER 有权
标题翻译：数字相干光接收机
公开(公告)号：US20100303474A1
公开(公告)日：2010-12-02
申请号：US12776514
申请日：2010-05-10
申请人： Hisao NAKASHIMA , Takeshi Hoshida
发明人： Hisao NAKASHIMA , Takeshi Hoshida
IPC分类号： H04B10/06
CPC分类号： H04B10/697 , H04B10/61 , H04B10/611 , H04B10/613 , H04B10/6165
摘要： A digital coherent optical receiver provided with a 90-degree optical hybrid circuit for detecting an in-phase signal and a quadrature signal of an input optical signal, includes first through fourth circuits. The first circuit calculates a square of a sum of the in-phase signal and the quadrature signal. The second circuit subtracts a squared value of the in-phase signal and a squared value of the quadrature signal from the calculation result of the first circuit. The third circuit detects a phase error of the 90-degree optical hybrid circuit based on the calculation result of the second circuit. The fourth circuit corrects at least one of the in-phase signal and the quadrature signal according to the phase error detected by the third circuit.
摘要翻译：具有用于检测输入光信号的同相信号和正交信号的90度光混合电路的数字相干光接收机包括第一至第四电路。第一电路计算同相信号和正交信号之和的平方。第二电路从第一电路的计算结果中减去同相信号的平方值和正交信号的平方值。第三电路基于第二电路的计算结果来检测90度光混合电路的相位误差。第四电路根据由第三电路检测到的相位误差校正至少一个同相信号和正交信号。

22. 发明授权

US07773283B2 Optical modulation device and optical modulation method 有权
标题翻译：光调制装置及光调制方式
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。

23. 发明授权

US07706695B2 Optical DQPSK receiver apparatus 失效
标题翻译：光DQPSK接收机
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。

24. 发明申请

US20100054759A1 Method for Electric Power Supply of Optical Receiver, Digital Signal Processing Circuit, and Optical Receiver 有权
标题翻译：光接收机，数字信号处理电路和光接收机的供电方法
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。

25. 发明申请

US20100040383A1 Differential multilevel modulated optical signal receiver apparatus 失效
标题翻译：差分多电平调制光信号接收装置
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。

26. 发明授权

US07555061B2 Optical communication device 有权
标题翻译：光通信设备
公开(公告)号：US07555061B2
公开(公告)日：2009-06-30
申请号：US11155666
申请日：2005-06-20
申请人： Toru Katagiri , Takeshi Hoshida , Tomoo Takahara , Kentaro Nakamura , Naoki Kuwata
发明人： Toru Katagiri , Takeshi Hoshida , Tomoo Takahara , Kentaro Nakamura , Naoki Kuwata
IPC分类号： H04L27/20
CPC分类号： H04B10/5051 , H04B10/505 , H04B10/5053 , H04B10/5055 , H04B10/5561 , H04L25/03343 , H04L27/2075 , H04L27/2096
摘要： An optical sender is disclosed that operates in a Differential Quadrature Phase Shift Keying modulation scheme for high speed optical transmission and is capable of performing logical calculations at a low speed. The optical sender transmits a Differential Quadrature Phase Shift Keying (DQPSK) signal generated with modulation signals ρk and ηk so that a signal directly output from a signal receiver corresponding to the optical sender is in agreement with data signals Ik and Qk to be transmitted. The signal receiver is capable of modulation by DQPSK, and the modulation signals ρk and ηk are precoded by using the data signals Ik and Qk and the modulation signals one symbol earlier (ρk−1 and ηk−1) . The optical sender includes plural precoders that perform logical calculation simultaneously and in parallel on plural data signals one period after another period.
摘要翻译：公开了一种用于高速光传输的差分正交相移键控调制方案的光发送器，并能够以低速进行逻辑运算。光发送器发送利用调制信号rhok和etak生成的差分正交相移键控（DQPSK）信号，使得从与光发送器对应的信号接收器直接输出的信号与要发送的数据信号Ik和Qk一致。信号接收机能够通过DQPSK调制，并且通过使用数据信号Ik和Qk以及前一个符号（rhok-1和etak-1）的调制信号对调制信号rhok和etak进行预编码。光发送器包括多个预编码器，这些预编码器在一个周期之后的一个周期上同时并行并行地执行多个数据信号。

27. 发明授权

US07505414B2 Network designing device and computer-readable medium 有权
标题翻译：网络设计设备和计算机可读介质
公开(公告)号：US07505414B2
公开(公告)日：2009-03-17
申请号：US10992829
申请日：2004-11-22
申请人： Hisao Nakashima , Takeshi Hoshida , Yuichi Akiyama , Takafumi Terahara
发明人： Hisao Nakashima , Takeshi Hoshida , Yuichi Akiyama , Takafumi Terahara
IPC分类号： H04L12/28
CPC分类号： H04L41/145
摘要： Linear networks are divided into a plurality of regeneration repeating sections which have nodes having regeneration repeaters arranged therein at both ends, devices such as linear repeaters or OADMs are arranged at the nodes positioned in the regeneration repeating sections, a plurality of assumed paths assumed as a result of arranging the devices are extracted in the regeneration repeating sections, and transmission permission/inhibition is determined transmission permission/inhibition is displayed to allow a user to perform settings again.
摘要翻译：线性网络被分成多个再生重复部分，其具有在其两端布置有再生中继器的节点，诸如线性中继器或OADM的设备被布置在位于再生重复部分中的节点处，多个假定路径被假定为在再生重复部分中抽出装置的结果，对每个假设路径确定发送允许/禁止，然后显示所确定的发送允许/禁止以允许用户再次执行设置。

28. 发明申请

US20080297270A1 Driver circuit of optical modulator 失效
标题翻译：光调制器的驱动电路
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。

29. 发明申请

US20080080805A1 Compensating method and compensator of first-order polarization mode dispersion, and optical transmission system using same 审中-公开
标题翻译：一阶偏振模色散的补偿方法和补偿器，以及使用其的光传输系统
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。

30. 发明授权

US07200344B1 Receiver and method for a multichannel optical communication system 有权
标题翻译：多通道光通信系统的接收机和方法
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。

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