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    Polarization-alternating optical signal generation using CSRZ modulation
    3.
    发明授权
    Polarization-alternating optical signal generation using CSRZ modulation 有权
    使用CSRZ调制的极化交替光信号生成

    公开(公告)号：US08787709B2

    公开(公告)日：2014-07-22

    申请号：US13435775

    申请日：2012-03-30

    申请人： Fatih Yaman ,  Shaoliang Zhang ,  Lei Xu ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

    发明人： Fatih Yaman ,  Shaoliang Zhang ,  Lei Xu ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

    IPC分类号： G02F1/035 ,  G02F1/01

    CPC分类号： G02F1/01 ,  H04B10/5162 ,  H04B10/5165 ,  H04B10/532

    摘要： A method for optical chirp-free optical polarization modulation includes dividing a data modulated optical signal into a first optical path and a second optical path, using a Mach-Zehnder intensity modulator in the first optical path for imparting a π phase difference between adjacent symbols of the data modulated optical signal in the first optical path, adjusting a delay and amplitude of symbols of the data modulated optical signal in the second path so that the symbols in the first path and the symbols in the second path are synchronized and have substantially equal power levels, and combining the first and second optical paths so that symbols from the first and second optical paths are in orthogonal polarizations.

    摘要翻译： 一种用于无啁啾光学偏振调制的方法包括：使用第一光路中的马赫 - 曾德尔强度调制器将数据调制光信号划分成第一光路和第二光路， 在第一光路中的数据调制光信号的相邻符号之间的相位差，调整第二路径中的数据调制光信号的符号的延迟和幅度，使得第一路径中的符号和第二路径中的符号为 同步并且具有基本上相等的功率电平，并且组合第一和第二光路，使得来自第一和第二光路的符号处于正交偏振。

    SOFT-DECISION NON-BINARY LDPC CODING FOR ULTRA-LONG-HAUL OPTICAL TRANSOCEANIC TRANSMISSIONS
    4.
    发明申请
    SOFT-DECISION NON-BINARY LDPC CODING FOR ULTRA-LONG-HAUL OPTICAL TRANSOCEANIC TRANSMISSIONS 审中-公开
    用于超长距离光电传输的软决策非二进制LDPC编码

    公开(公告)号：US20120216093A1

    公开(公告)日：2012-08-23

    申请号：US13402462

    申请日：2012-02-22

    申请人： Ivan B. Djordjevic ,  Shaoliang Zhang ,  Lei Xu ,  Fatih Yaman ,  Ting Wang

    发明人： Ivan B. Djordjevic ,  Shaoliang Zhang ,  Lei Xu ,  Fatih Yaman ,  Ting Wang

    IPC分类号： H03M13/29 ,  G06F11/10

    CPC分类号： H03M13/1171 ,  H03M13/253 ,  H03M13/6561 ,  H04L1/0045 ,  H04L1/0055 ,  H04L1/0057 ,  H04L1/0071

    摘要： Methods and systems for soft-decision non-binary low-density parity-check (LDPC) coding for ultra-long-haul optical transoceanic transmissions are provided. A receiver includes one or more maximum a posteriori (MAP) equalizers configured to decode one or more symbols of an encoded input stream to provide one or more symbol log-likelihood ratios (LLRs). One or more LLR estimators are configured to estimate the log-likelihood ratios of the one or more symbol LLRs to provide one or more bit LLRs. One or more non-binary LDPC decoders are configured to decode the input stream using the one or more bit LLRs to recover an original input stream.

    摘要翻译： 提供了用于超长距离光学跨洋传输的软判决非二进制低密度奇偶校验（LDPC）编码的方法和系统。 接收机包括一个或多个最大后验（MAP）均衡器，其被配置为解码编码输入流的一个或多个符号以提供一个或多个符号对数似然比（LLR）。 一个或多个LLR估计器被配置为估计一个或多个符号LLR的对数似然比以提供一个或多个比特LLR。 一个或多个非二进制LDPC解码器被配置为使用一个或多个比特LLR解码输入流，以恢复原始输入流。

    Coherent Interleaved Polarization-Multiplexing Optical Communications with Single IQ Modulator
    5.
    发明申请
    Coherent Interleaved Polarization-Multiplexing Optical Communications with Single IQ Modulator 审中-公开
    具有单IQ调制器的相干交错极化复用光通信

    公开(公告)号：US20120321311A1

    公开(公告)日：2012-12-20

    申请号：US13523045

    申请日：2012-06-14

    申请人： Shaoliang Zhang ,  Fatih Yaman ,  Lei Xu ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

    发明人： Shaoliang Zhang ,  Fatih Yaman ,  Lei Xu ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

    IPC分类号： H04J14/06

    CPC分类号： H04B10/616 ,  H04B10/5051 ,  H04B10/532 ,  H04B10/5561 ,  H04J14/06

    摘要： An inventive method for coherent interleaved polarization-multiplexing PolMux optical communications with a single IQ modulator includes modulating a light source to generate a 50% return-to-zero RZ signal pulse at a frequency Rs, driving a single IQ modulator with inphase I and quadrature phase Q data at a bit rate of sais Rs to introduce phase modulation on said 50% RZ signal pulse to produce a QPSK pulse signal with all symbols being in a same polarization state without any time overlapping; and polarization modulating said QPSK signal to alternatively convert said QPSK signal into two orthogonal polarizations states enabling an interleaving PolMux signal with a symbol rate of Rs/2.

    摘要翻译： 用于具有单个IQ调制器的相干交错偏振复用PolMux光通信的创新方法包括调制光源以产生频率为Rs的50％归零RZ信号脉冲，以同相I和正交驱动单个IQ调制器 相位Q数据以sais的比特率在所述50％RZ信号脉冲上引入相位调制以产生QPSK脉冲信号，所有符号处于相同的极化状态，没有任何时间重叠; 以及对所述QPSK信号进行极化调制，以将所述QPSK信号交替地转换为使得能够以Rs / 2的符号率进行交织的PolMux信号的两个正交极化状态。

    Polarization-Alternating Optical Signal Generation using CSRZ Modulation
    7.
    发明申请
    Polarization-Alternating Optical Signal Generation using CSRZ Modulation 有权
    使用CSRZ调制的极化交替光信号生成

    公开(公告)号：US20120251028A1

    公开(公告)日：2012-10-04

    申请号：US13435775

    申请日：2012-03-30

    申请人： Fatih Yaman ,  Shaoliang Zhang ,  Lei Xu ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

    发明人： Fatih Yaman ,  Shaoliang Zhang ,  Lei Xu ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

    IPC分类号： G02F1/01

    CPC分类号： G02F1/01 ,  H04B10/5162 ,  H04B10/5165 ,  H04B10/532

    摘要： A method for optical chirp-free optical polarization modulation includes dividing a data modulated optical signal into a first optical path and a second optical path, using a Mach-Zehnder intensity modulator in the first optical path for imparting a π phase difference between adjacent symbols of the data modulated optical signal in the first optical path, adjusting a delay and amplitude of symbols of the data modulated optical signal in the second path so that the symbols in the first path and the symbols in the second path are synchronized and have substantially equal power levels, and combining the first and second optical paths so that symbols from the first and second optical paths are in orthogonal polarizations.

    摘要翻译： 一种用于无啁啾光学偏振调制的方法包括：使用第一光路中的马赫 - 曾德尔强度调制器将数据调制光信号划分成第一光路和第二光路， 在第一光路中的数据调制光信号的相邻符号之间的相位差，调整第二路径中的数据调制光信号的符号的延迟和幅度，使得第一路径中的符号和第二路径中的符号为 同步并且具有基本上相等的功率电平，并且组合第一和第二光路，使得来自第一和第二光路的符号处于正交偏振。

    ULTRA WIDE-RANGE FREQUENCY OFFSET ESTIMATION FOR DIGITAL COHERENT OPTICAL RECEIVERS
    9.
    发明申请
    ULTRA WIDE-RANGE FREQUENCY OFFSET ESTIMATION FOR DIGITAL COHERENT OPTICAL RECEIVERS 有权
    数字相干光接收机的超宽频偏估计

    公开(公告)号：US20110085797A1

    公开(公告)日：2011-04-14

    申请号：US12902801

    申请日：2010-10-12

    申请人： Lei Xu ,  Shaoliang Zhang ,  Jianjun Yu ,  Ting Wang

    发明人： Lei Xu ,  Shaoliang Zhang ,  Jianjun Yu ,  Ting Wang

    IPC分类号： H04B10/08 ,  H04B10/06

    CPC分类号： H04B10/611 ,  H04B10/60 ,  H04B10/6164 ,  H04B10/6165

    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。

    Ultra wide-range frequency offset estimation for digital coherent optical receivers
    10.
    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

    申请人： Lei Xu ,  Shaoliang Zhang ,  Jianjun Yu ,  Ting Wang

    发明人： Lei Xu ,  Shaoliang Zhang ,  Jianjun Yu ,  Ting Wang

    IPC分类号： H04B10/08 ,  H04B10/06

    CPC分类号： H04B10/611 ,  H04B10/60 ,  H04B10/6164 ,  H04B10/6165

    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。