公开(公告)号：US20120082414A1

公开(公告)日：2012-04-05

申请号：US13377774

申请日：2010-06-30

Applicant: Yohei Sakamaki ,  Toshikazu Hashimoto ,  Yusuke Nasu ,  Kuninori Hattori ,  Hiroshi Takahashi

Inventor： Yohei Sakamaki ,  Toshikazu Hashimoto ,  Yusuke Nasu ,  Kuninori Hattori ,  Hiroshi Takahashi

IPC: G02B6/26

CPC classification number: H04B10/677 ,  G02B6/12004 ,  G02B6/12007 ,  H04B10/611 ,  H04B10/613

Abstract: An optical 90-degree hybrid circuit includes: first and second optical splitters for receiving and splitting a first and second light beam into two, respectively; a first optical coupler for generating an interfering light beam by multiplexing one of the light beams split by the first optical splitter and the second optical splitter; and a second optical coupler for generating an interfering light beam by multiplexing another one of the light beams split by the first optical splitter and the second optical splitter. The first optical splitter includes an optical coupler configured to output two light beams having equal phases, and the second optical splitter includes an optical coupler configured to output two light beams having a phase difference of 90 degrees.

Abstract translation: 光学90度混合电路包括：第一和第二光分路器，用于分别将第一和第二光束分别接收和分离成两个; 第一光耦合器，用于通过复用由第一光分路器和第二分光器分裂的光束之一来产生干涉光束; 以及第二光耦合器，用于通过复用由第一光分路器和第二分光器分裂的另一个光束来产生干涉光束。 第一光分路器包括配置为输出具有相等相位的两个光束的光耦合器，并且第二光分路器包括配置成输出具有90度相位差的两个光束的光耦合器。

公开(公告)号：US08103166B2

公开(公告)日：2012-01-24

申请号：US12319777

申请日：2009-01-12

Applicant: Xiang Liu

Inventor： Xiang Liu

IPC: H04J14/06

CPC classification number: H04B10/614 ,  H04B10/61 ,  H04B10/611 ,  H04B10/613

Abstract: An exemplary apparatus for digital coherent detection of a multi-wavelength signal includes a polarization-diversity optical hybrid, at least four Wavelength De-Multiplexing (W-DMUX) filters, 4M detectors, and 4M analog-to-digital converters (ADCs), with M an integer greater than one. The hybrid has a first input for receiving a multi-wavelength signal including M sub-channels at different wavelengths, and a second input for receiving a reference light source including M continuous-wave references at different wavelengths that approximates center wavelengths of the M sub-channels. The hybrid has at least four outputs. A W-DMUX input for each W-DMUX filter is provided a corresponding one of the hybrid outputs, and each W-DMUX filter provides M filtered optical channel outputs. Each detector converts at least one of the filtered channel outputs into a corresponding electrical signal. Each ADC converts one of the electrical signals into a corresponding digital signal. The corresponding digital signals represent the M sub-channels.

Abstract translation: 用于多波长信号的数字相干检测的示例性装置包括偏振分集光混合器，至少四个波分复用（W-DMUX）滤波器，4M检测器和4M模数转换器（ADC）， M为大于1的整数。 该混合器具有用于接收包括不同波长的M个子信道的多波长信号的第一输入端和用于接收包括M个不同波长的M个连续波参考的参考光源的第二输入，该参考光源近似于M个子通道的中心波长， 频道 混合动力具有至少四个输出。 每个W-DMUX滤波器的W-DMUX输入端提供相应的一个混合输出，每个W-DMUX滤波器提供M个滤波后的光信道输出。 每个检测器将至少一个滤波的通道输出转换成相应的电信号。 每个ADC将一个电信号转换成相应的数字信号。 相应的数字信号表示M个子通道。

公开(公告)号：US20120008961A1

公开(公告)日：2012-01-12

申请号：US12915506

申请日：2010-10-29

Applicant: Young-Kai Chen ,  Noriaki Kaneda ,  Alex Pidwerbetsky

Inventor： Young-Kai Chen ,  Noriaki Kaneda ,  Alex Pidwerbetsky

IPC: H04B10/00

CPC classification number: H04B10/1121 ,  H04B10/613

Abstract: An approach is provided that uses diversity to compensate fading of free-space optical (FSO) signals propagating through an environment characterized by atmospheric scintillation. One embodiment involves collecting at least one FSO beam, demultiplexing the beam by wavelength into at least two sub-beams, detecting each sub-beam to produce an electrical output therefrom, and recovering a signal using complementary information from at least two of the electrical outputs. Another embodiment involves collecting the FSO beam onto an array of spatially separated sub-apertures, detecting the light entering each sub-aperture to produce an electrical output therefrom, and recovering a signal using complementary information from at least two of the electrical outputs. This second embodiment enables both electronic adaptive processing to coherently integrate across the sub-apertures and in the case of multiple transmit apertures a free space optical Multiple Input Multiple Output (MIMO) system.

Abstract translation: 提供了一种使用分集来补偿通过大气闪烁特征的环境传播的自由空间光（FSO）信号的衰落的方法。 一个实施例涉及收集至少一个FSO波束，通过波长将光束解复用为至少两个子波束，检测每个子波束以产生电输出，以及使用来自至少两个电输出的补充信息来恢复信号 。 另一个实施例涉及将FSO光束收集到空间上分离的子孔径阵列上，检测进入每个子孔径的光以产生其电输出，以及使用来自至少两个电输出的补充信息来恢复信号。 该第二实施例使得电子自适应处理能够在子孔径之间相干地集成，并且在多个发射孔径的情况下使得自由空间光学多输入多输出（MIMO）系统。

公开(公告)号：US20110318017A1

公开(公告)日：2011-12-29

申请号：US12824490

申请日：2010-06-28

Applicant: Han Henry Sun ,  Kuang-Tsan Wu

Inventor： Han Henry Sun ,  Kuang-Tsan Wu

IPC: H04B10/00 ,  H04B10/04

CPC classification number: H04B10/6165 ,  H04B10/611 ,  H04B10/612 ,  H04B10/613

Abstract: Consistent with the present disclosure, optical signals are modulated in accordance with a higher order QAM modulation format, such as 8-QAM, to carry customer data, for example. The optical signals are converted to corresponding electrical signals, which are then subject to further processing. In particular, phase data associated with the higher order QAM constellation is processed, such that the outer points of the constellation are rotated to have the same phase as the inner points. As a result, both the inner and outer points resemble a constellation, and both may be more readily processed using feedforward or feedback carrier recovery. After such carrier recovery, the phase data is further processed so that the outer points are rotated back and the customer data can be extracted from the phase data.

Abstract translation: 与本公开一致，例如根据诸如8-QAM的更高阶QAM调制格式来调制光信号以承载客户数据。 光信号被转换成相应的电信号，然后进行进一步的处理。 特别地，处理与高阶QAM星座相关联的相位数据，使得星座的外部点被旋转以具有与内部点相同的相位。 结果，内点和外部点都类似于星座，并且两者可以使用前馈或反馈载波恢复更容易地进行处理。 在这种载波恢复之后，进一步处理相位数据，使得外点被回转并且可以从相位数据中提取客户数据。

公开(公告)号：US20110200339A1

公开(公告)日：2011-08-18

申请号：US13017874

申请日：2011-01-31

Applicant: Kosuke KOMAKI ,  Masahiro Shioda ,  Katsumi Fukumitsu ,  Osamu Takeuchi

Inventor： Kosuke KOMAKI ,  Masahiro Shioda ,  Katsumi Fukumitsu ,  Osamu Takeuchi

IPC: H04B10/06

CPC classification number: H04B10/6971 ,  H04B10/61 ,  H04B10/611 ,  H04B10/613 ,  H04B10/6151 ,  H04B10/6161 ,  H04B10/6165 ,  H04L7/0004 ,  H04L7/0335 ,  H04L27/223 ,  H04L27/227

Abstract: An optical receiver includes: a waveform distortion compensator to perform an operation on digital signal representing an optical signal generated by an A/D converter to compensate for waveform distortion of the optical signal; a phase detector to generate phase information representing sampling phase of the A/D converter; a phase adjuster to generate digital signal representing an optical signal in which the sampling phase of the A/D converter is adjusted from an output signal of the waveform distortion compensator using the phase information; a demodulator to generate a demodulated signal from the output signal of the phase adjuster; a phase controller to control the sampling phase of the A/D converter; a peak detector to detect a peak value of the phase information while the sampling phase of the A/D converter is controlled by the phase controller; and a compensation controller to control the waveform distortion compensator using the peak value.

Abstract translation: 光接收器包括：波形失真补偿器，用于对表示由A / D转换器产生的光信号的数字信号进行操作以补偿光信号的波形失真; 相位检测器，用于产生表示A / D转换器的采样相位的相位信息; 相位调节器，用于产生代表使用相位信息的波形失真补偿器的输出信号调整A / D转换器的采样相位的光信号的数字信号; 解调器，用于从所述相位调节器的输出信号产生解调信号; 控制A / D转换器采样相位的相位控制器; 峰值检测器，用于在由相位控制器控制A / D转换器的采样相位时检测相位信息的峰值; 以及使用峰值来控制波形失真补偿器的补偿控制器。

公开(公告)号：US20110150503A1

公开(公告)日：2011-06-23

申请号：US12642765

申请日：2009-12-18

Applicant: Peter J. Winzer

Inventor： Peter J. Winzer

IPC: H04B10/06

CPC classification number: H04B10/611 ,  H04B10/60 ,  H04B10/613 ,  H04B10/614

Abstract: A digital signal processor (DSP) operating within, for example, an optical receiver wherein the DSP processes complex sample streams derived from a modulated optical signal, the DSP configured to perform a method of acquiring an intermediate frequency (IF) signal from within the received optical signal, the method comprising: processing at least one block of complex sample stream symbols using a frequency locked loop (FLL) to achieve an initial constellation lock condition, the FLL having a nominal lock-in spectral region; if an initial constellation lock condition is not achieved within a predetermined amount of time, shifting the spectral region processed by the FLL to a spectral region proximate a current operating spectral region.

Abstract translation: 在例如光接收器中操作的数字信号处理器（DSP），其中DSP处理从调制的光信号导出的复杂样本流，该DSP被配置为执行从接收到的信号中获取中频（IF）信号的方法 所述方法包括：使用频率锁定环（FLL）处理至少一个复杂采样流符号块以实现初始星座锁定状态，所述FLL具有标称锁定光谱区域; 如果在预定时间内没有实现初始星座锁定条件，则将由FLL处理的频谱区域移动到接近当前工作频谱区域的频谱区域。

公开(公告)号：US20100329698A1

公开(公告)日：2010-12-30

申请号：US12822348

申请日：2010-06-24

Applicant: Hisao NAKASHIMA

Inventor： Hisao NAKASHIMA

IPC: H04B10/06

CPC classification number: H04B10/6161 ,  H04B10/60 ,  H04B10/613 ,  H04B10/614

Abstract: A signal processing circuit includes: a first compensator configured to compensate for waveform distortion corresponding to chromatic dispersion of a received optical signal by using digital electrical signals obtained by sampling analog electrical signals by using a sampling signal, the analog electrical signals being obtained by opto-electric conversion of multiple optical signals that include an intensity of the received optical signal and phase information thereon; and a chromatic dispersion compensation controller configured to control a compensation value for the chromatic dispersion in the first compensation from the digital electrical signals in which the chromatic dispersion has been compensated for on the basis of a detected phase offset between the sampling signal and a modulation frequency of the received optical signal.

Abstract translation: 信号处理电路包括：第一补偿器，被配置为通过使用通过使用采样信号对模拟电信号进行采样而获得的数字电信号来补偿对应于所接收的光信号的色散的波形失真，所述模拟电信号通过光 - 包括所接收的光信号的强度和相位信息的多个光信号的电转换; 以及色散补偿控制器，被配置为基于所检测到的采样信号和调制频率之间的相位偏移，从已经补偿了色散的数字电信号中控制第一补偿中的色散的补偿值 的接收光信号。

公开(公告)号：US07809284B2

公开(公告)日：2010-10-05

申请号：US11426191

申请日：2006-06-23

Applicant: Noriaki Kaneda ,  Andreas B. Leven

Inventor： Noriaki Kaneda ,  Andreas B. Leven

IPC: H04B10/06

CPC classification number: H04B10/614 ,  H04B10/61 ,  H04B10/613 ,  H04B10/63

Abstract: An apparatus, a polarization diversity receiver and a method of receiving a received optical signal. In one embodiment, the apparatus includes: (1) an optical device configured to separate in-phase and quadrature components of a received optical signal, to transmit the in-phase components to a first optical output thereof and to transmit the quadrature components to a second optical output thereof, (2) a first polarization splitter coupled to receive light at the first optical output and (3) a second polarization splitter coupled to receive light at the second optical output.

Abstract translation: 一种装置，极化分集接收机和接收接收的光信号的方法。 在一个实施例中，该装置包括：（1）配置成分离所接收的光信号的同相和正交分量的光学装置，以将同相分量传输到其第一光输出，并将正交分量传输到 （2）耦合以在第一光输出处接收光的第一偏振分离器和（3）耦合以在第二光输出处接收光的第二偏振分离器。

公开(公告)号：US20100209121A1

公开(公告)日：2010-08-19

申请号：US12707113

申请日：2010-02-17

Applicant: Takahito TANIMURA

Inventor： Takahito TANIMURA

IPC: H04B10/06 ,  G02F1/01

CPC classification number: H04B10/611 ,  H04B10/613 ,  H04B10/6162 ,  H04J14/06 ,  H04L7/002 ,  H04L7/0335

Abstract: A signal processing device includes: a phase controller configured to control respective phases of an in-phase signal and an quadrature signal, which are obtained by converting an analog signal into a digital signal when a multi-value phase modulation light is demodulated, by digital signal processing; and a control amount provider configured to provide a control amount to the phase controller based on an output of the phase controller.

Abstract translation: 一种信号处理装置，包括：相位控制器，被配置为控制同相信号和正交信号的各个相位，所述相位相位和正交信号是通过数字地将多值相位调制光解调时将模拟信号转换为数字信号而获得的 信号处理; 以及控制量提供器，被配置为基于所述相位控制器的输出向所述相位控制器提供控制量。

公开(公告)号：US20100178065A1

公开(公告)日：2010-07-15

申请号：US12620540

申请日：2009-11-17

Applicant: Masato Nishihara ,  Tomoo Takahara ,  Hisao Nakahima

Inventor： Masato Nishihara ,  Tomoo Takahara ,  Hisao Nakahima

IPC: H04B10/06 ,  H03M1/12

CPC classification number: H04B10/614 ,  H04B10/61 ,  H04B10/613 ,  H04B10/6165

Abstract: A delay device that provides a delay amount to at least one of the in-phase signal and the quadrature signal, and a delay control section that controls the delay amount provided by the delay device based on a quality of the signals when the in-phase signal and the quadrature signal, to the at least one of which the delay amount is provided, at the delay device are converted into digital signals by the analog-digital converter, and the digital signal processing is carried out at the processor are provided. Thereby, the signal quality of recovered data at a receiving end of a multi-level phase modulation communication system is improved.

Abstract translation: 一种向至少一个同相信号和正交信号提供延迟量的延迟装置，以及延迟控制部分，当延迟装置根据同相信号和正交信号中的信号质量， 信号和正交信号至延迟装置中提供的延迟量中的至少一个被模拟数字转换器转换成数字信号，并且在处理器处执行数字信号处理。 因此，提高了在多级相位调制通信系统的接收端的恢复数据的信号质量。