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61. 发明申请

US20080056710A1 Dispersion compensating apparatus and dispersion compensation control method 有权
标题翻译：色散补偿装置和色散补偿控制方法
公开(公告)号：US20080056710A1
公开(公告)日：2008-03-06
申请号：US11785896
申请日：2007-04-20
申请人： Hiroki Ooi , Hiroshi Onaka , Takeshi Hoshida
发明人： Hiroki Ooi , Hiroshi Onaka , Takeshi Hoshida
IPC分类号： H04B17/00
CPC分类号： H04B10/25133
摘要： A variable dispersion compensating unit compensates an optical signal, and changes the compensation amount according to a control signal that has a given frequency. After demodulation of the compensated optical signal, error conditions of the signal are monitored and an error signal is output. A band pass filter filters the error signal for a component having a frequency equal to or less than the given frequency. Based on the component and on the control signal, a synchronous detecting circuit generates a compensation amount modification signal. The compensation amount modification signal is superposed on the control signal.
摘要翻译：可变色散补偿单元补偿光信号，并根据具有给定频率的控制信号改变补偿量。在对补偿的光信号进行解调之后，监视信号的误差状况并输出误差信号。带通滤波器滤波具有等于或小于给定频率的频率的分量的误差信号。基于分量和控制信号，同步检测电路产生补偿量修正信号。补偿量修正信号叠加在控制信号上。

62. 发明申请

US20080031633A1 Multi-level modulation receiving device 有权
标题翻译：多级调制接收装置
公开(公告)号：US20080031633A1
公开(公告)日：2008-02-07
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。

63. 发明授权

US07233742B2 Optical communication system, method for supplying pump light, and distributed Raman amplifying apparatus 有权
标题翻译：光通信系统，泵浦光供给方法和分布式拉曼放大装置
公开(公告)号：US07233742B2
公开(公告)日：2007-06-19
申请号：US10021079
申请日：2001-12-19
申请人： Takeshi Hoshida , Takafumi Terahara
发明人： Takeshi Hoshida , Takafumi Terahara
IPC分类号： H04J14/02
CPC分类号： H04B10/2935 , H04B10/2916
摘要： An optical communication system according to the invention comprises: a transmitting station 11; an optical transmission line 12 for transmitting an optical signal sent from the transmitting station 11; a receiving station 13 for receiving the optical signal outputted from the optical transmission line 12; a repeater station 14 provided at one point or more in the optical transmission line 12; and pump light sources 21 provided in at least two of the stations 11, 13, 14, for supplying pump light to the optical transmission line 12, wherein the pump light has two types or more of wavelength. It is possible to obtain a substantially flat gain as a function of wavelength in the whole optical communication system since the pump lights with different wavelengths are supplied from a plurality of points in the optical transmission line 12 and an optical signal is amplified with various Raman gain coefficients.
摘要翻译：根据本发明的光通信系统包括：发送站11; 用于发送从发送站11发送的光信号的光传输线路12; 接收站13，用于接收从光传输线路12输出的光信号; 设置在光传输线路12中的一点以上的中继站14; 以及设置在站11,13,14中的至少两个站中的泵浦光源21，用于向光传输线12供应泵浦光，其中泵浦光具有两种或更多种波长。由于具有不同波长的泵浦光由光传输线路12中的多个点提供，所以可以在整个光通信系统中获得作为波长的函数的基本上平坦的增益，并且光信号用各种拉曼增益放大系数。

64. 发明申请

US20070127933A1 Optical DQPSK receiver apparatus 有权
标题翻译：光DQPSK接收机
公开(公告)号：US20070127933A1
公开(公告)日：2007-06-07
申请号：US11392754
申请日：2006-03-30
申请人： Takeshi Hoshida , Kazuo Hironishi
发明人： Takeshi Hoshida , Kazuo Hironishi
IPC分类号： H04B10/06
CPC分类号： H04B10/66
摘要： A first interferometer comprises a first delay element and a first phase shift element, and a second interferometer comprises a second delay element and a second phase shift element. The amounts of phase shift in the first and second phase shift element are zero and π/2, respectively. A first photo detector comprises first and second photodiodes connected in parallel, and a second photo detector comprises third and fourth photodiodes connected in series. The first photodiode is provided with a first optical output of the first interferometer, the second photodiode is provided with a first optical output of the second interferometer, the third photodiode is provided with a second optical output of the first interferometer, and the fourth photodiode is provided with a second optical output of the second interferometer. A signal process circuit recovers transmitted data based on output signals of the first and second photo detectors.
摘要翻译：第一干涉仪包括第一延迟元件和第一相移元件，第二干涉仪包括第二延迟元件和第二相移元件。第一和第二相移元件中的相移量分别为零和pi / 2。第一光电检测器包括并联连接的第一和第二光电二极管，第二光电检测器包括串联连接的第三和第四光电二极管。第一光电二极管设置有第一干涉仪的第一光输出，第二光电二极管设置有第二干涉仪的第一光输出，第三光电二极管设置有第一干涉仪的第二光输出，第四光电二极管设置有第二干涉仪的第二光输出。信号处理电路基于第一和第二光电检测器的输出信号来恢复发送的数据。

65. 发明申请

US20070047969A1 Differential quadrature phase-shift modulator and method for setting driving voltage thereof 有权
标题翻译：差分正交相移调制器及其驱动电压的设定方法
公开(公告)号：US20070047969A1
公开(公告)日：2007-03-01
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
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。

66. 发明申请

US20070047966A1 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：US20070047966A1
公开(公告)日：2007-03-01
申请号：US11289508
申请日：2005-11-30
申请人： Kazuo Hironishi , Takeshi Hoshida
发明人： Kazuo Hironishi , Takeshi Hoshida
IPC分类号： H04B10/00
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pi / 4移相器元件。在第四光路中，配置了pi / 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。

67. 发明申请

US20060193399A1 Optical communication device 有权
标题翻译：光通信设备
公开(公告)号：US20060193399A1
公开(公告)日：2006-08-31
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： H04L27/22
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。光发送器发送使用调制信号rho和k和k进行生成的差分正交相移键控（DQPSK）信号，使得从与信号接收器对应的信号接收器直接输出的信号光发送器与要发送的数据信号I SUB和Q N k一致。该信号接收机能够通过DQPSK进行调制，并且通过使用数据信号I SUB和/或其调制信号对调制信号进行预编码并且调制信号先前有一个符号（rho-k-1和eta-k-1）。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。

68. 发明授权

US07099541B2 Optical fiber cable 有权
标题翻译：光纤电缆
公开(公告)号：US07099541B2
公开(公告)日：2006-08-29
申请号：US11066537
申请日：2005-02-28
申请人： Takafumi Terahara , Rainer Hainberger , Takeshi Hoshida
发明人： Takafumi Terahara , Rainer Hainberger , Takeshi Hoshida
IPC分类号： G02B6/44
CPC分类号： H04B10/2916 , G02B6/02252 , G02B6/02266 , G02B6/262 , G02B6/29377 , H01S3/302 , H04B10/25253 , H04B2210/003
摘要： An optical fiber cable including a plurality of optical fibers, each optical fiber having a characteristic value in a middle field which is larger than characteristic values in fields other than the middle field of the optical fiber. The characteristic value in a respective field is a nonlinear refractive index of the optical fiber in the field divided by an effective cross section of the optical fiber in the field. The middle field and the characteristic value in the middle field are set as a combination to suppress a nonlinear phase shift generated in light transmitted through the plurality of optical fibers.
摘要翻译：一种包括多根光纤的光缆，每个光纤在中间场中具有比光纤的中间场以外的场中的特征值大的特征值。各个场中的特征值是场中光纤的非线性折射率除以现场光纤的有效截面。将中间场和中间场中的特征值设定为组合，以抑制在透过多根光纤的光中产生的非线性相移。

69. 发明授权

US06990296B2 Optical phase modulation 有权
公开(公告)号：US06990296B2
公开(公告)日：2006-01-24
申请号：US10028658
申请日：2001-12-21
申请人： Seemant Choudhary , Takeshi Hoshida
发明人： Seemant Choudhary , Takeshi Hoshida
IPC分类号： H04B10/04
CPC分类号： H04B10/5561 , H04B10/505 , H04B10/5051 , H04B10/5055 , H04B10/5057 , H04B10/50577
摘要： An optical modulator provides for preceding of a high data rate phase modulated optical signal. According to one embodiment, the modulator includes a first phase modulator and a second phase modulator. The first phase modulator modulates an optical carrier signal according to a first data signal to generate a modulated optical signal. The second phase modulator modulates the modulated optical signal according to a time delayed version of its optical output signal. According to another embodiment, the modulator electrically precodes multiple data streams and modulates the precoded data streams using a series of phase modulators to generate a precoded optical data signal.

70. 发明申请

US20050220388A1 Optical waveform shaper 有权
标题翻译：光波形整形器
公开(公告)号：US20050220388A1
公开(公告)日：2005-10-06
申请号：US11094642
申请日：2005-03-31
申请人： Kazuo Hironishi , Takeshi Hoshida , Hiroshi Onaka
发明人： Kazuo Hironishi , Takeshi Hoshida , Hiroshi Onaka
IPC分类号： G02F1/01 , G02F1/21 , G02F1/295 , G02F1/35 , G02F1/365 , G02F2/00
CPC分类号： H04B10/299 , G02F1/3501 , G02F1/3517 , G02F1/3519 , G02F2001/212 , G02F2201/16 , G02F2203/26
摘要： The optical waveform shaper comprises a plurality of interferometers connected in series. The transfer function of each interferometer is either one of a first transfer function, in which the second order derivative of the output optical power in respect to the input optical power is positive when the input optical power is in the neighborhood of zero, or a second transfer function, and the output optical power shows substantially periodical changes to the input optical power, or a second transfer function, in which the second order derivative of the output optical power in respect to the input optical power is negative when the input optical power is in the neighborhood of zero, or a second transfer function, and the output optical power shows substantially periodical changes to the input optical power. At least one of the interferometers uses the second transfer function.
摘要翻译：光波形整形器包括串联连接的多个干涉仪。每个干涉仪的传递函数是第一传递函数中的一个，其中输入光功率相对于输入光功率的输出光功率的二阶导数在输入光功率在零附近为正时，或第二传递函数传输函数，输出光功率对输入光功率或第二传递函数实质上周期性地改变，其中当输入光功率为输入光功率时，输出光功率的二阶导数相对于输入光功率为负值在零附近或第二传递函数中，并且输出光功率基本上周期性地改变输入光功率。至少一个干涉仪使用第二传递函数。

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