16 quadrature amplitude modulation optical signal transmitter
    51.
    发明授权
    16 quadrature amplitude modulation optical signal transmitter 有权
    16正交幅度调制光信号发射机

    公开(公告)号:US08761612B2

    公开(公告)日:2014-06-24

    申请号:US12562260

    申请日:2009-09-18

    IPC分类号: H04B10/00

    CPC分类号: H04B10/5053 H04B10/541

    摘要: An optical transmitter includes a dividing optical coupler, a first optical modulator driven by an I component of a first signal and a I component of a second signal for modulating a lightwave, a DC bias of the first optical, a second optical modulator driven by a Q component of the first signal and a Q component of the second signal for modulating a lightwave, a DC bias of the second optical modulator, a phase shifter, and a combining optical coupler for combining the modulated lightwave from the first optical coupler and the phase shifted Q components of the first and second signals for generating a quadrature amplitude modulated signal.

    摘要翻译: 光发射机包括分光光耦合器,由第一信号的I分量驱动的第一光调制器和用于调制光波的第二信号的I分量,第一光学器件的DC偏置,第二光调制器驱动的第二光调制器 第一信号的Q分量和用于调制光波的第二信号的Q分量,第二光调制器的DC偏置,移相器和组合光耦合器,用于组合来自第一光耦合器的调制光波和相位 用于产生正交幅度调制信号的第一和第二信号的移位Q分量。

    Ultra wide-range frequency offset estimation for digital coherent optical receivers
    53.
    发明授权
    Ultra wide-range frequency offset estimation for digital coherent optical receivers 有权
    数字相干光接收机的超宽范围频偏估计

    公开(公告)号:US08463121B2

    公开(公告)日:2013-06-11

    申请号:US12902801

    申请日:2010-10-12

    IPC分类号: H04B10/08 H04B10/06

    摘要: Methods and systems for receiving an optical signal using cascaded frequency offset estimation. Coherently detecting an optical signal includes compensating for a coarse laser frequency offset between a transmitting laser and a local oscillator laser by determining a maximum phase error (MPE) in the optical signal, compensating for a residual laser frequency offset between the transmitting laser and the local oscillator laser, and decoding data stored in the optical signal.

    摘要翻译: 使用级联频偏估计接收光信号的方法和系统。 相干检测光信号包括通过确定光信号中的最大相位误差(MPE)来补偿发射激光器和本地振荡器激光器之间的粗激光频率偏移,补偿发射激光器和局部振荡器之间的残余激光频率偏移 振荡器激光器和解码存储在光信号中的数据。

    Method and apparatus for an optical duty cycle for an optical digital coherent system
    54.
    发明授权
    Method and apparatus for an optical duty cycle for an optical digital coherent system 有权
    用于光学数字相干系统的光学占空比的方法和装置

    公开(公告)号:US08358936B2

    公开(公告)日:2013-01-22

    申请号:US12562251

    申请日:2009-09-18

    IPC分类号: H04B10/04 H04B10/12

    CPC分类号: H04B10/50

    摘要: An optical apparatus includes a quadrature phase shift keying modulator for generating a non-return-to-zero quadrature phase shift keyed NRZ-QPSK signal from a received lightwave, the modulator being driven by a radio frequency RF signal, an intensity modulator for carving the NRZ-QPSK signal to return-to-zero RZ pulses with a different duty cycle than that of the NRZ-QPSK, the intensity modulator being driven by a radio frequency RF clock signal to change the NRZ-QPSK to an RZ-QPSK signal, and an optical filter with a narrow band for filtering the signal from the intensity modulator to increase optical power that is useable by an optical digital coherent detection system.

    摘要翻译: 光学装置包括:正交相移键控调制器,用于从接收到的光波产生不归零正交相移键控的NRZ-QPSK信号,调制器由射频RF信号驱动;强度调制器,用于雕刻 NRZ-QPSK信号以与NRZ-QPSK的占空比不同的占空比的归零RZ脉冲,强度调制器由射频RF时钟信号驱动,以将NRZ-QPSK改变为RZ-QPSK信号, 以及具有窄带的滤光器,用于对来自强度调制器的信号进行滤波,以增加可由光学数字相干检测系统使用的光功率。

    Feedback adjustable constellation de-mapper
    55.
    发明授权
    Feedback adjustable constellation de-mapper 有权
    反馈可调星座去映射器

    公开(公告)号:US08184731B2

    公开(公告)日:2012-05-22

    申请号:US12372378

    申请日:2009-02-17

    IPC分类号: H04L5/12

    CPC分类号: H04L27/233

    摘要: A system and method to adjust the symbol constellation used to de-map a signal in an optical coherent communications system. A feedback de-mapper adjustment module is configured to compare average Error Vector Magnitude and Bit Error Ratio to a pre-defined table to determine when a constellation de-mapper mismatch occurs. The feedback de-mapper adjustment module then rotates the de-mapper constellation in order to compensate for phase drift.

    摘要翻译: 一种用于调整用于在光学相干通信系统中去映射信号的符号星座的系统和方法。 反馈解映射器调整模块被配置为将平均误差矢量幅度和误码率与预定义的表进行比较,以确定何时发生星座解映射器失配。 反馈解映射器调整模块随后旋转去映射器星座以便补偿相位漂移。

    Wavelength division multiplexing passive optical network architecture with source-free optical network units
    57.
    发明授权
    Wavelength division multiplexing passive optical network architecture with source-free optical network units 有权
    波分复用无源光网络架构与无源光网络单元

    公开(公告)号:US07965947B2

    公开(公告)日:2011-06-21

    申请号:US11867090

    申请日:2007-10-04

    IPC分类号: H04B10/04

    摘要: An optical system and method includes a source-free optical network unit coupled to an optical fiber for receiving an original carrier signal with downstream data over the optical fiber. The optical network unit includes a modulator configured to remodulate the original carrier signal with upstream data to produce an upstream data signal for transmission back down the optical fiber in a direction opposite to a direction in which that original carrier signal was received.

    摘要翻译: 光学系统和方法包括耦合到光纤的无源光网络单元,用于通过光纤接收具有下行数据的原始载波信号。 光网络单元包括调制器,其被配置为用上行数据对原始载波信号进行再调制,以产生上行数据信号,以便在与接收原始载波信号的方向相反的方向上向下传输光纤。

    Generating A 400-Gbit/s Single-Channel Optical Signal
    58.
    发明申请
    Generating A 400-Gbit/s Single-Channel Optical Signal 有权
    生成400 Gbit / s单通道光信号

    公开(公告)号:US20110020003A1

    公开(公告)日:2011-01-27

    申请号:US12789943

    申请日:2010-05-28

    IPC分类号: H04J14/02 H04B10/04

    CPC分类号: H04B10/548 H04J14/06

    摘要: A method for generating a 400 Gb/s single channel optical signal from multiple modulated subchannels includes carving respective modulated subchannels into return-to-zero RZ modulated subchannels having non-overlapping peaks with intensity modulators having a duty cycle less than 50%, and combining the subchannels into a single channel signal aggregating the bit rate of each of the subchannels. The subchannels are combined with a flat top optical component for increased subsequent receiver sensitivity.

    摘要翻译: 用于从多个调制子信道生成400Gb / s单信道光信号的方法包括将具有非重叠峰值的相应调制子信道刻蚀成具有占空比小于50%的强度调制器的归零至零RZ调制子信道,以及组合 将子信道转换成单个信道信号,聚合每个子信道的比特率。 子通道与平顶光学部件组合,以增加后续的接收灵敏度。

    VERNIER RING TIME-TO-DIGITAL CONVERTERS WITH COMPARATOR MATRIX
    59.
    发明申请
    VERNIER RING TIME-TO-DIGITAL CONVERTERS WITH COMPARATOR MATRIX 有权
    具有比较器矩阵的VERNIER RING时间到数字转换器

    公开(公告)号:US20100283653A1

    公开(公告)日:2010-11-11

    申请号:US12697111

    申请日:2010-01-29

    IPC分类号: H03M1/50

    CPC分类号: G04F10/005

    摘要: A time to digital converter (TDC) is able to be utilized for measuring a time interval between two signals with a very fine time resolution, which is defined as the difference in propagation delay per stage between two rings or chains of delay stages. The Vernier ring TDC, Vernier TDC with comparator matrix or Vernier ring TDCs with comparator matrix comprise two rings or chains of delay stages with slightly different propagation delays per stage and a plurality of comparators for comparing two signals propagation along two rings or chains and determining when the lag signal passes the lead signal. The lead and lag signal are initiated by two events and are each fed into a separate one the first stages of one of the specified rings or chains. The comparators are able to be organized in a comparator matrix in order to occupy less space and permit reuse. As a result, the input time interval (the time between the two initiating events) is able to be measured through the product of the time resolution and the number of stages through which the two signals propagated.

    摘要翻译: 时间数字转换器(TDC)能够用于测量具有非常精细时间分辨率的两个信号之间的时间间隔,其被定义为两个环或延迟级链之间的每级传播延迟的差异。 具有比较器矩阵的游标环TDC或具有比较器矩阵的游标环TDC的游标TDC包括两个延迟级的环或链,每级具有略微不同的传播延迟,以及用于比较两个信号沿着两个环或链进行传播的多个比较器, 滞后信号通过引导信号。 引导和滞后信号由两个事件引发,并且分别被馈送到指定的环或链中的一个的第一阶段的单独的一个。 比较器能够被组织在比较器矩阵中,以占用较少的空间并允许重用。 结果,输入时间间隔(两个启动事件之间的时间)能够通过时间分辨率和传播两个信号的级数的乘积来测量。

    All Optical Up-Conversion System
    60.
    发明申请
    All Optical Up-Conversion System 有权
    所有光学上转换系统

    公开(公告)号:US20100046962A1

    公开(公告)日:2010-02-25

    申请号:US12546250

    申请日:2009-08-24

    申请人: Jianjun Yu

    发明人: Jianjun Yu

    IPC分类号: H04B10/00

    CPC分类号: H04B10/90 H04B10/2575

    摘要: An optical system for providing all-optical up-conversion of a baseband signal including an all-optical up-converter responsive to baseband signals to provide corresponding dual sideband signals about a suppressed optical carrier, said dual sideband signals each having the same polarization direction, being phase locked, having the same optical power and having a fixed frequency spacing; and an optical filter for filtering the carrier signals and providing wavelength division multiplexed signals without optical carriers. In a preferred embodiment, the all-optical up-converter includes an intensity modulator for generating two pump lightwaves that are carrier suppressed in response to the intensity modulator receiving a laser light source and being driven by an RF signal, wherein the intensity modulator is DC biased at a null point, an optical combiner for combining the baseband signal and the two pump lightwaves, a nonlinear medium for four wave mixing the baseband signal and two pump lightwaves to generate the baseband signal and corresponding dual sideband signals, and an optical interleaver for removing the baseband signal and two pump lightwaves to provide said sideband signals about the suppressed optical carrier.

    摘要翻译: 一种光学系统,用于响应于基带信号提供包括全光上变频器的基带信号的全光上变换,以提供关于被抑制的光载波的对应的双边带信号,所述双边带信号各自具有相同的偏振方向, 具有相同的光功率并具有固定的频率间隔; 以及用于对载波信号进行滤波并提供无光载波的波分复用信号的滤光器。 在一个优选实施例中,全光上变换器包括一个强度调制器,用于产生两个泵浦光波,该两个波浪波响应于接收激光光源并由RF信号驱动的强度调制器被抑制,其中强度调制器是DC 偏置在零点,用于组合基带信号和两个泵浦光波的光组合器,用于四波混频基带信号和两个泵浦光波的非线性介质,以产生基带信号和相应的双边带信号,以及用于 去除基带信号和两个泵浦光波,以提供关于被抑制的光载波的所述边带信号。