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    Analog-to-digital conversion controller, optical receiving device, optical receiving method, and waveform-distortion compensating device
    21.
    发明申请
    Analog-to-digital conversion controller, optical receiving device, optical receiving method, and waveform-distortion compensating device 有权
    模数转换控制器，光接收装置，光接收方式和波形失真补偿装置

    公开(公告)号：US20080198051A1

    公开(公告)日：2008-08-21

    申请号：US12068234

    申请日：2008-02-04

    申请人： Takahito Tanimura ,  Hisao Nakashima ,  Takeshi Hoshida

    发明人： Takahito Tanimura ,  Hisao Nakashima ,  Takeshi Hoshida

    IPC分类号： H03M1/00

    CPC分类号： H04L7/007 ,  H03M1/1255 ,  H04B10/697

    摘要： An optical receiving device of the present invention receives optical signals from an optical transmitting device which uses a modulation format wherein an optical intensity waveform of each symbol is return-to-zero (RZ) pulse, and converts the received optical signals into digital signals by a conversion process of an analog to digital (AD) converter. A control-value calculating unit subsequent to the AD converter digitally processes the digital signals, retrieves an absolute value of the digital signals or a value corresponding one-to-one with the absolute value of the digital signals, estimates errors from an appropriate timing of a sampling timing in the AD converter based on the absolute value of the digital signals or the value corresponding one-to-one with the absolute value of the digital signals, and calculates a control value controlling the sampling timing based on the estimated errors. Based on the control value, a phase of a pulse regulating the sampling timing of AD conversion can be compensated.

    摘要翻译： 本发明的光接收装置接收来自光发送装置的光信号，该光发送装置采用调制格式，其中每个符号的光强度波形为归零（RZ）脉冲，并将接收到的光信号转换成数字信号 模数转换器（AD）转换器的转换过程。 AD转换器之后的控制值计算单元对数字信号进行数字处理，用数字信号的绝对值检索数字信号的绝对值或与之对应的值，从适当的定时估计误差 基于数字信号的绝对值的AD转换器中的采样定时或与数字信号的绝对值一一对应的值，并且基于估计的误差来计算控制采样定时的控制值。 基于控制值，可以补偿调节AD转换的采样定时的脉冲的相位。

    Optical receiving apparatus and digital receiving circuit
    22.
    发明授权
    Optical receiving apparatus and digital receiving circuit 有权
    光接收装置和数字接收电路

    公开(公告)号：US08744276B2

    公开(公告)日：2014-06-03

    申请号：US12408176

    申请日：2009-03-20

    申请人： Hisao Nakashima ,  Takeshi Hoshida ,  Takahito Tanimura ,  Lei Li ,  Ling Liu

    发明人： Hisao Nakashima ,  Takeshi Hoshida ,  Takahito Tanimura ,  Lei Li ,  Ling Liu

    IPC分类号： H04B10/00

    CPC分类号： H04B10/6165 ,  H04B10/61 ,  H04B10/611 ,  H04L7/0054 ,  H04L27/223

    摘要： An optical receiving apparatus includes a combining unit that combines signal light and reference light; a optoelectric converting unit that converts, into electrical signals, two or more optical signals that enable reconstruction of a complex electric field signal of the signal light obtained by the combining unit; and a sampling clock generating unit that generates a sampling clock that has a frequency preset based on a symbol rate of the signal light and is asynchronous with the signal light. The optical receiving apparatus further includes a digital converting unit that samples at the frequency of the sampling clock signal, an electrical signal obtained by the optoelectric converting unit and converts the electrical signal into a digital signal; and a digital signal processing unit that demodulates a received signal based on a complex digital signal obtained from the digital signal obtained by the digital converting unit.

    摘要翻译： 光接收装置包括组合信号光和参考光的组合单元; 光电转换单元，其将电信号转换成能够重构由组合单元获得的信号光的复电场信号的两个或更多个光信号; 以及采样时钟产生单元，其生成具有基于信号光的符号率预设的频率并且与信号光异步的采样时钟。 光接收装置还包括数字转换单元，以采样时钟信号的频率采样，由光电转换单元获得的电信号，并将该电信号转换为数字信号; 以及数字信号处理单元，其基于从由数字转换单元获得的数字信号获得的复数数字信号来解调接收信号。

    Analog-to-digital conversion controller, optical receiving device, optical receiving method, and waveform-distortion compensating device
    24.
    发明授权
    Analog-to-digital conversion controller, optical receiving device, optical receiving method, and waveform-distortion compensating device 有权
    模数转换控制器，光接收装置，光接收方式和波形失真补偿装置

    公开(公告)号：US07602322B2

    公开(公告)日：2009-10-13

    申请号：US12068234

    申请日：2008-02-04

    申请人： Takahito Tanimura ,  Hisao Nakashima ,  Takeshi Hoshida

    发明人： Takahito Tanimura ,  Hisao Nakashima ,  Takeshi Hoshida

    IPC分类号： H03M1/06

    CPC分类号： H04L7/007 ,  H03M1/1255 ,  H04B10/697

    摘要： An optical receiving device of the present invention receives optical signals from an optical transmitting device which uses a modulation format wherein an optical intensity waveform of each symbol is return-to-zero (RZ) pulse, and converts the received optical signals into digital signals by a conversion process of an analog to digital (AD) converter. A control-value calculating unit subsequent to the AD converter digitally processes the digital signals, retrieves an absolute value of the digital signals or a value corresponding one-to-one with the absolute value of the digital signals, estimates errors from an appropriate timing of a sampling timing in the AD converter based on the absolute value of the digital signals or the value corresponding one-to-one with the absolute value of the digital signals, and calculates a control value controlling the sampling timing based on the estimated errors. Based on the control value, a phase of a pulse regulating the sampling timing of AD conversion can be compensated.

    摘要翻译： 本发明的光接收装置接收来自光发送装置的光信号，该光发送装置采用调制格式，其中每个符号的光强度波形为归零（RZ）脉冲，并将接收到的光信号转换成数字信号 模数转换器（AD）转换器的转换过程。 AD转换器之后的控制值计算单元对数字信号进行数字处理，用数字信号的绝对值检索数字信号的绝对值或与之对应的值，从适当的定时估计误差 基于数字信号的绝对值的AD转换器中的采样定时或与数字信号的绝对值一一对应的值，并且基于估计的误差来计算控制采样定时的控制值。 基于控制值，可以补偿调节AD转换的采样定时的脉冲的相位。

    Optical receiving apparatus and method
    25.
    发明申请
    Optical receiving apparatus and method 审中-公开
    光接收装置及方法

    公开(公告)号：US20090226187A1

    公开(公告)日：2009-09-10

    申请号：US12320069

    申请日：2009-01-15

    申请人： Takahito Tanimura ,  Takeshi Hoshida ,  Hisao Nakashima ,  Shoichiro Oda

    发明人： Takahito Tanimura ,  Takeshi Hoshida ,  Hisao Nakashima ,  Shoichiro Oda

    IPC分类号： H04B10/06

    CPC分类号： H04B10/677 ,  H04B10/60 ,  H04B10/69

    摘要： An optical receiving apparatus compensates degradation of an optical signal received, based a division operation using the intensity of the optical signal. A receiving unit outputs a first electrical signal corresponding to the phase of the optical signal and a second electrical signal corresponding to the intensity of the optical signal. An analog first dividing unit and a second dividing unit divide the first electrical signal by the second electrical signal. A first ADC and a second ADC convert the divided electrical signal to a digital signal. An identifying unit identifies data of the optical signal based on calculation using the digital signal.

    摘要翻译： 光接收装置基于使用光信号的强度的分割操作来补偿所接收的光信号的劣化。 接收单元输出对应于光信号的相位的第一电信号和对应于光信号的强度的第二电信号。 模拟第一分割单元和第二分割单元将第一电信号除以第二电信号。 第一ADC和第二ADC将分频电信号转换为数字信号。 识别单元基于使用数字信号的计算来识别光信号的数据。

    Optical receiver and optical transmission system
    26.
    发明授权
    Optical receiver and optical transmission system 有权
    光接收机和光传输系统

    公开(公告)号：US08768173B2

    公开(公告)日：2014-07-01

    申请号：US13324639

    申请日：2011-12-13

    申请人： Takahito Tanimura ,  Takeshi Hoshida

    发明人： Takahito Tanimura ,  Takeshi Hoshida

    IPC分类号： H04B10/06 ,  H04B10/00 ,  H04L27/00

    CPC分类号： H04B10/61

    摘要： An optical receiver includes: a first generator to generate, from an optical signal to which a reference signal is inserted, a first digital signal representing a signal component of a first partial band including the reference signal, using a first local oscillation light of a first frequency; a second generator to generate, from the optical signal, a second digital signal representing a signal component of a second partial band including the reference signal, using a second local oscillation light of a second frequency being different from the first frequency; a frequency compensator to adjust a frequency of the signal component of the first partial band and a frequency of the signal component of the second partial band according to a frequency of the reference signal; and a combiner to combine the first and second partial bands adjusted by the frequency compensator.

    摘要翻译： 一种光接收机，包括：第一发生器，用于从第一数字信号中产生参考信号，第一数字信号表示包含参考信号的第一部分频带的信号分量，使用第一本地振荡光 频率; 第二发生器，使用与所述第一频率不同的第二频率的第二本地振荡光，从所述光信号产生表示包括所述参考信号的第二部分频带的信号分量的第二数字信号; 频率补偿器，用于根据参考信号的频率调整第一部分频带的信号分量的频率和第二部分频带的信号分量的频率; 以及组合器，以组合由频率补偿器调整的第一和第二部分频带。

    MULTI-WAVELENGTH LIGHT SOURCE
    27.
    发明申请
    MULTI-WAVELENGTH LIGHT SOURCE 有权
    多波长光源

    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 。

    Polarization multiplexing and transmitting apparatus
    29.
    发明授权
    Polarization multiplexing and transmitting apparatus 有权

    公开(公告)号：US08380084B2

    公开(公告)日：2013-02-19

    申请号：US13348245

    申请日：2012-01-11

    申请人： Takahito Tanimura ,  Takeshi Hoshida

    发明人： Takahito Tanimura ,  Takeshi Hoshida

    IPC分类号： H04B10/04

    CPC分类号： H04J14/06 ,  H04B10/505 ,  H04B10/532 ,  H04B10/541 ,  H04B10/548 ,  H04B10/5561 ,  H04J14/08 ,  H04L5/04

    摘要： A polarization multiplexing and transmitting apparatus generates polarization multiplexed light by multiplexing modulated signal components that having varying intensities and are in polarization states orthogonal to each other. The polarization multiplexing and transmitting apparatus includes a converting unit that converts light generated by a light source into signal components having a varying intensity synchronized with a clock signal input thereto and a varying intensity inversely synchronized with the clock signal, respectively; a modulating unit that modulates the signal components, respectively; and a polarization adjusting unit that orthogonalizes polarization states of the signal components.