公开(公告)号：US20080253768A1

公开(公告)日：2008-10-16

申请号：US12060351

申请日：2008-04-01

申请人： Jianjun Yu ,  Philip Nan Ji ,  Lei Xu ,  Ting Wang

发明人： Jianjun Yu ,  Philip Nan Ji ,  Lei Xu ,  Ting Wang

IPC分类号： H04J14/00

CPC分类号： H04J14/0227 ,  H04B10/5165 ,  H04B10/54 ,  H04B10/5561 ,  H04J14/0246 ,  H04J14/0279 ,  H04L5/0005 ,  H04L5/0044 ,  H04L5/0053 ,  H04L27/02

摘要： Optical packets are generated by generating a first optical beam with a first wavelength and a second optical beam with a second optical beam. The first optical beam is modulated with a payload signal and then filtered to reduce the bandwidth of the signal. The second optical beam is modulated with a label signal. The filtered modulated first optical beam and modulated second optical beam are combined to generate a dual-wavelength optical beam.

摘要翻译： 通过产生具有第一波长的第一光束和具有第二光束的第二光束来产生光学分组。 用有效载荷信号调制第一个光束，然后滤波以减少信号的带宽。 用标签信号调制第二光束。 经过滤波的调制的第一光束和调制的第二光束被组合以产生双波长光束。

公开(公告)号：US20080240736A1

公开(公告)日：2008-10-02

申请号：US11692432

申请日：2007-03-28

申请人： Philip Nan Ji ,  Lei Xu ,  Ting Wang ,  Shuji Murakami ,  Tsutomu Tajima ,  Yutaka Yano

发明人： Philip Nan Ji ,  Lei Xu ,  Ting Wang ,  Shuji Murakami ,  Tsutomu Tajima ,  Yutaka Yano

IPC分类号： H04B10/06

CPC分类号： H04B10/677

摘要： An optical device includes an interferometer for a received optical differential phase shift keying DPSK signal, and an equalizer integrated with the interferometer in a manner for reducing from optical filtering effects an interference by signal bits of the DPSK signal with signal bits of a contiguous DPSK signal. The interferometer is a Michelson delay interferometer type, but can also be a Mach-Zehnder delay interferometer type on fiber, waveguide or other optical structure. The equalizer is a Fabry-Perot type equalizer, but can be a ring resonator type or a fiber based equalizer.

摘要翻译： 光学装置包括用于接收的光学差分相移键控DPSK信号的干涉仪，以及与干涉仪集成的均衡器，以减少光学滤波的方式，利用DPSK信号的信号位与相邻DPSK信号的信号位的干扰 。 干涉仪是迈克尔逊延迟干涉仪型号，但也可以是光纤，波导或其他光学结构上的马赫 - 曾德延迟干涉仪。 均衡器是法布里 - 珀罗型均衡器，但可以是环形谐振器型或基于光纤的均衡器。

公开(公告)号：US08873953B2

公开(公告)日：2014-10-28

申请号：US13523103

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： H04Q11/00 ,  H04B10/04 ,  H04J14/06 ,  H04B10/532 ,  H04B10/556

CPC分类号： H04Q11/00 ,  H04B10/532 ,  H04B10/5561 ,  H04L27/2075 ,  H04L27/2096 ,  H04L27/223 ,  H04Q2213/1301

摘要： An inventive method for multi-symbol polarization switching for differential detection optical systems includes modulating a laser source by a DQPSK modulator, driving the DQPSK modulator with a data block configured for generating multi-symbol polarization-switched DQPSK differential-encoded signals, and polarizing the multi-symbol polarization-switched DQPSK signals with a polarizing modulator whose modulation speed is based on how often polarization states vary, wherein the data block provides a bits manipulation to provide the multi-symbol polarization switching thereby enabling differential detection for recovering correct original data by a receiver.

摘要翻译： 用于差分检测光学系统的多符号偏振切换的创新方法包括通过DQPSK调制器调制激光源，用配置用于产生多符号偏振切换DQPSK差分编码信号的数据块驱动DQPSK调制器， 具有偏振调制器的多符号偏振切换DQPSK信号，其调制速度基于偏振态变化的频率，其中数据块提供比特操作以提供多符号偏振切换，从而使差分检测能够通过以下方式恢复正确的原始数据： 接收器

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。

公开(公告)号：US08718490B2

公开(公告)日：2014-05-06

申请号：US12183332

申请日：2008-07-31

申请人： Lei Xu ,  Junqiang Hu ,  Ting Wang ,  Dayou Qian ,  Yutaka Yano

发明人： Lei Xu ,  Junqiang Hu ,  Ting Wang ,  Dayou Qian ,  Yutaka Yano

IPC分类号： H04B10/61

CPC分类号： H04L27/2647 ,  H04B10/63

摘要： A method includes producing interference between a received optical OFDM signal and an optical carrier extracted from the received optical OFDM signal to provide optical coherent detection of the received optical OFDM signal. Preferably, producing the interference includes optically splitting the received optical OFDM signal into a first part that is filtered to extract the carrier from the received optical OFDM signal and a second part similar to the received optical OFDM signal.

摘要翻译： 一种方法包括：从所接收的光学OFDM信号中提取接收到的光OFDM信号与光载波之间产生干扰，以提供所接收的光OFDM信号的光相干检测。 优选地，产生干扰包括将所接收的光学OFDM信号光学分割成被滤波的第一部分，以从接收的光学OFDM信号中提取载波，以及类似于接收的光学OFDM信号的第二部分。

公开(公告)号：US08588623B2

公开(公告)日：2013-11-19

申请号：US12860659

申请日：2010-08-20

申请人： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

发明人： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

IPC分类号： H04B10/06

CPC分类号： H04L25/03171 ,  H04B10/532 ,  H04B10/6971 ,  H04J14/002 ,  H04J14/06 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0071 ,  H04L27/3405

摘要： Systems and methods for optical communication that use a transmitter/receiver. The systems and methods include receiving a modulated, encoded input stream. Channel memory is reduced using coarse digital backpropagation and other channel impairments are removed using turbo equalization. Symbols are detected in the input stream that conform to a non-uniform, polar constellation having a Gaussian source distribution to produce a stream of encoded data. The stream of encoded data is decoded with one or more low density parity check (LDPC) decoders.

摘要翻译： 使用发射机/接收机的光通信系统和方法。 系统和方法包括接收经调制的编码的输入流。 使用粗数字反向传播减少信道存储，并且使用turbo均衡消除其他信道损伤。 在符合具有高斯源分布的非均匀极坐标的输入流中检测符号以产生编码数据流。 编码数据流用一个或多个低密度奇偶校验（LDPC）解码器解码。

公开(公告)号：US08582769B2

公开(公告)日：2013-11-12

申请号：US12846915

申请日：2010-07-30

申请人： Yi Zhao ,  Martin Roetteler ,  Lei Xu ,  Ting Wang

发明人： Yi Zhao ,  Martin Roetteler ,  Lei Xu ,  Ting Wang

IPC分类号： H04K1/00

CPC分类号： H04L9/0852

摘要： Systems and methods to communicate securely includes communicating quantum encryption data on a first wavelength-division multiplexing passive optical network (WDM-PON); and communicating data over separate classical channels of a second WDM-PON, wherein the second WDM-PON synchronizes with the first WDM-PON while providing data communication over the classical channels.

摘要翻译： 用于安全通信的系统和方法包括在第一波分复用无源光网络（WDM-PON）上传送量子加密数据; 以及在第二WDM-PON的单独的经典信道上传送数据，其中所述第二WDM-PON与所述第一WDM-PON同步，同时在经典信道上提供数据通信。

公开(公告)号：US08538278B2

公开(公告)日：2013-09-17

申请号：US12702895

申请日：2010-02-09

申请人： Hussam G. Batshon ,  Lei Xu ,  Ting Wang ,  Ivan B. Djordjevic

发明人： Hussam G. Batshon ,  Lei Xu ,  Ting Wang ,  Ivan B. Djordjevic

IPC分类号： H04B10/06

CPC分类号： H04J14/06 ,  H04B10/60 ,  H04B10/6161 ,  H04B10/6162

摘要： In a polarization-multiplexing optical communications system, a method and system for coherent reception of polarization-multiplexed optical communications. Training and data sequences are recovered from a plurality of orthogonally polarized signals, such that training and data sequences may be used on a single channel without loss of spectral efficiency. This is accomplished by estimating a channel response for each orthogonally polarized signal based on the mean of the signal and distinguishing between a data sequence and a training sequence in each orthogonally polarized signal. Such distinguishing is accomplished according to an iterative linear minimum mean-square equalization based on the respective channel response estimate.

摘要翻译： 在偏振复用光通信系统中，用于偏振复用光通信的相干接收的方法和系统。 从多个正交极化信号恢复训练和数据序列，使得训练和数据序列可以在单个信道上使用而不损失频谱效率。 这通过基于信号的平均值估计每个正交极化信号的信道响应并且在每个正交极化信号中区分数据序列和训练序列来实现。 这种区分是根据相应的信道响应估计的迭代线性最小均方均衡完成的。

公开(公告)号：US08385439B2

公开(公告)日：2013-02-26

申请号：US12392294

申请日：2009-02-25

申请人： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

发明人： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

IPC分类号： H04K1/10 ,  H04K3/00 ,  H04B10/06

CPC分类号： H04L27/3405 ,  H04B10/2569 ,  H04B10/60 ,  H04B10/697 ,  H04B2210/252 ,  H04L1/005 ,  H04L1/0631 ,  H04L1/0656 ,  H04L5/0023 ,  H04L25/067 ,  H04L27/2649 ,  H04L2025/03426 ,  H04L2025/03611

摘要： Receivers and methods are provided for polarization mode dispersion compensation in multi-level coded-modulation schemes using a BLAST algorithm and iterative polarization cancellation. A receiver includes a vertical Bell Laboratories Layered Space-Time Architecture (V-BLAST) orthogonal frequency division multiplexing (OFDM) detector configured to receive input sequences and partially cancel polarization interference with respect to the input sequences to output symbol estimates for the input sequences. The receiver further includes one or more low-density parity-check (LDPC) decoders coupled to the V-BLAST OFDM detector configured to receive channel bit reliabilities and output code words. The channel bit reliabilities are indirectly calculated from the symbol estimates. The one or more LDPC decoders iteratively provide extrinsic soft information feedback to the V-BLAST OFDM detector to compensate for the polarization interference.

摘要翻译： 为使用BLAST算法和迭代偏振消除的多电平编码调制方案中的偏振模色散补偿提供接收机和方法。 接收机包括垂直的贝尔实验室分层时空架构（V-BLAST）正交频分复用（OFDM）检测器，其被配置为接收输入序列并部分地消除相对于输入序列的偏振干扰，以输出输入序列的符号估计。 接收机还包括耦合到V-BLAST OFDM检测器的一个或多个低密度奇偶校验（LDPC）解码器，被配置为接收信道位可靠性和输出码字。 信道位可靠性是从符号估计中间接计算的。 一个或多个LDPC解码器向V-BLAST OFDM检测器反复地提供外在的软信息反馈以补偿极化干扰。

公开(公告)号：US08234538B2

公开(公告)日：2012-07-31

申请号：US11941747

申请日：2007-11-16

申请人： Ivan B. Djordjevic ,  Milorad Cvijetic ,  Lei Xu ,  Ting Wang

发明人： Ivan B. Djordjevic ,  Milorad Cvijetic ,  Lei Xu ,  Ting Wang

IPC分类号： H03M13/00

CPC分类号： H03M13/1111 ,  H03M13/255 ,  H03M13/6325

摘要： An optical communication system includes a bit-interleaved coded modulation (BICM) coder; and a low-density parity-check (LDPC) coder coupled to the BICM coder to generate codes used as component codes and in combination with a coherent detector.

摘要翻译： 光通信系统包括位交织编码调制（BICM）编码器; 以及耦合到BICM编码器的低密度奇偶校验（LDPC）编码器，以生成用作分量代码并与相干检测器组合的代码。