公开(公告)号：US20080279559A1

公开(公告)日：2008-11-13

申请号：US12117347

申请日：2008-05-08

申请人： Jianjun Yu ,  Dayou Qian ,  Lei Xu ,  Ting Wang

发明人： Jianjun Yu ,  Dayou Qian ,  Lei Xu ,  Ting Wang

IPC分类号： H04B10/00 ,  H04B10/04

CPC分类号： H04B10/25758

摘要： A method includes generating an optical millimeter wave signal for modulation of a first data signal, and deriving from the generated optical millimeter wave signal a subsequent light source for modulation of a second data signal. More specifically the generating includes modulating a light wave to a multiple of a frequency of an oscillating signal. Alternatively, the generating includes modulating a data signal mixed with an oscillating signal to a multiple of a frequency of the oscillating signal. The deriving includes modulating a frequency component filtered from a data modulation of the generated optical millimeter wave signal.

摘要翻译： 一种方法包括产生用于调制第一数据信号的光学毫米波信号，以及从所生成的光学毫米波信号中导出用于调制第二数据信号的后续光源。 更具体地，生成包括将光波调制到振荡信号的频率的倍数。 或者，生成包括将与振荡信号混合的数据信号调制为振荡信号的频率的倍数。 导出包括调制从产生的光学毫米波信号的数据调制滤波的频率分量。

公开(公告)号：US20080166129A1

公开(公告)日：2008-07-10

申请号：US11940419

申请日：2007-11-15

申请人： Yuanqiu Luo ,  Jianjun Yu ,  Junqiang Hu ,  Lei Xu ,  Philip Nan Ji ,  Ting Wang ,  Milorad Cvijetic

发明人： Yuanqiu Luo ,  Jianjun Yu ,  Junqiang Hu ,  Lei Xu ,  Philip Nan Ji ,  Ting Wang ,  Milorad Cvijetic

IPC分类号： H04J14/02

CPC分类号： H04J14/0226 ,  H04J14/0232 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282 ,  H04J14/0298

摘要： An optical network component, architecture and method for a wavelength division multiplexed passive optical network includes a band coupler configured to demultiplex first and second wavelength division multiplexed content transmitted from an optical line terminal into a first band signal and a second band signal. An arrayed wavelength grating is configured to receive the first band signal and to further demultiplex the first band signal into different wavelengths to provide a plurality of wavelength signals. An optical splitter is configured to split the second band signal into sub-signals and multiplex the sub-signals with each of the wavelength signals such that the first and second wavelength division multiplexed content is provided on a single wavelength to a user.

摘要翻译： 用于波分复用无源光网络的光网络部件，结构和方法包括：频带耦合器，被配置为将从光线路终端发送的第一和第二波分复用内容解复用为第一频带信号和第二频带信号。 阵列波长光栅被配置为接收第一频带信号并进一步将第一频带信号解复用为不同波长以提供多个波长信号。 光分路器被配置为将第二频带信号分割为子信号，并且将子信号与每个波长信号进行复用，使得第一和第二波分复用内容以单个波长提供给用户。

公开(公告)号：US08977121B2

公开(公告)日：2015-03-10

申请号：US13270213

申请日：2011-10-10

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

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

IPC分类号： H04J14/04 ,  H04J14/02 ,  H04B10/25 ,  H04B10/291 ,  H04J14/06

CPC分类号： H04J14/0278 ,  H04B10/25 ,  H04B10/291 ,  H04J14/0201 ,  H04J14/04 ,  H04J14/06

摘要： An optical transport network based on multimode/multicore fibers includes a mode-multiplexer to multiplex independent data streams from one or more transmitters; a multimode erbium-doped fiber amplifier (MM EDFA) to compensate for MMF loss; a multimode optical add-drop multiplexer (MM OADM) to add and/or drop multimode channels in multimode networks; a multimode optical cross-connect; and a mode-demultiplexer to separate various mode streams to one or more receivers.

摘要翻译： 基于多模/多芯光纤的光传输网络包括：多路复用器，用于复用来自一个或多个发射机的独立数据流; 用于补偿MMF损耗的多模掺铒光纤放大器（MM EDFA）; 多模光分插复用器（MM OADM），用于在多模网络中添加和/或删除多模信道; 多模光交叉连接; 以及模式解复用器，用于将各种模式流分离到一个或多个接收器。

公开(公告)号：US08724998B2

公开(公告)日：2014-05-13

申请号：US13478892

申请日：2012-05-23

申请人： Lei Xu ,  Dayou Qian ,  Ting Wang

发明人： Lei Xu ,  Dayou Qian ,  Ting Wang

IPC分类号： H04B10/04 ,  H04J14/00

CPC分类号： H04L5/0012 ,  H04L5/0008 ,  H04L27/2642 ,  H04L27/2647

摘要： Methods and systems for secure communication include assigning data streams to respective orthogonal sub-carriers according to random number information at a transmitter. The data streams are modulated onto the respective orthogonal sub-carriers before the orthogonal sub-carriers are transmitted. The random number information is transmitted on a second medium, separate from the transmission medium. The orthogonal sub-carriers are received from the transmission medium at a receiver, while the random number information is received from the second medium at the receiver. The orthogonal sub-carriers are associated with data streams using the random number information and demodulated to produce data for the associated data stream.

摘要翻译： 用于安全通信的方法和系统包括根据发射机处的随机数信息将数据流分配给各个正交子载波。 在发送正交子载波之前，将数据流调制到各个正交子载波上。 在与传输介质分离的第二介质上发送随机数信息。 在接收机处从传输介质接收正交子载波，而在接收机处从第二媒体接收随机数信息。 正交子载波与使用随机数信息的数据流相关联并被解调以产生用于相关联的数据流的数据。

公开(公告)号：US08699625B2

公开(公告)日：2014-04-15

申请号：US13270211

申请日：2011-10-10

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

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

IPC分类号： H03K9/00 ,  H04Q11/02 ,  H04B3/20

CPC分类号： H04L1/0057 ,  H04L1/0042 ,  H04L5/0016 ,  H04L5/04 ,  H04L25/067 ,  H04L27/2628 ,  H04L27/3427

摘要： A coded multidimensional modulation system called generalized OFDM (GOFDM) uses orthogonal subcarriers as bases functions, and the signal constellation points of corresponding multidimensional constellation diagram are obtained as N-dimensional Cartesian product of one-dimensional PAM/two-dimensional QAM. In GOFDM, the N-dimensional/2N-dimensional signal constellation point is transmitted over all N subcarriers/2N-subcarriers, which serve as individual bases functions. Even if some of the subcarriers are severely affected by channel distortion, the overall signal constellation point will face only small distortion, when strong channel capacity achieving channel codes are used. In addition, because the channel capacity is a linear function of number of dimensions, the spectral efficiency of optical transmission systems is significantly improved. Finally, since Euclidean distance of multidimensional signal constellation is much larger that that of two-dimensional signal constellations, OSNR sensitivity is dramatically improved.

摘要翻译： 称为广义OFDM（GOFDM）的编码多维调制系统使用正交子载波作为基本功能，并且获得相应多维星座图的信号星座点作为一维PAM /二维QAM的N维笛卡尔乘积。 在GOFDM中，N维/ 2N维信号星座点在用作各个基本功能的所有N个子载波/ 2N个子载波上发送。 即使某些子载波受到信道失真的严重影响，当使用实现信道码的强信道容量时，整个信号星座点也只会面临小的失真。 另外，由于信道容量是维数的线性函数，所以光传输系统的频谱效率显着提高。 最后，由于多维信号星座的欧几里德距离远大于二维信号星座的距离，因此OSNR灵敏度得到显着提高。

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。

公开(公告)号：US08358936B2

公开(公告)日：2013-01-22

申请号：US12562251

申请日：2009-09-18

申请人： Jianjun Yu ,  Lei Xu ,  Dayou Qian ,  Ting Wang

发明人： Jianjun Yu ,  Lei Xu ,  Dayou Qian ,  Ting Wang

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。

公开(公告)号：US20120321303A1

公开(公告)日：2012-12-20

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

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：US20120263468A1

公开(公告)日：2012-10-18

申请号：US13446370

申请日：2012-04-13

申请人： Fatih Yaman ,  Shaoliang Zhang ,  Lei Xu ,  Yin Shao ,  Ting Wang

发明人： Fatih Yaman ,  Shaoliang Zhang ,  Lei Xu ,  Yin Shao ,  Ting Wang

IPC分类号： H04B10/04 ,  H04J14/02 ,  H04J14/06

CPC分类号： H04B10/5167 ,  H04B10/5561 ,  H04L27/2096

摘要： An optical method for generating an optical quadrature duobinary QDB signal includes receiving a quadrature phase-shift-keying QPSK signal, and adding a delay to the received quadrature phase-shift-keying QPSK signal to generate an optical quadrature duobinary signal.

摘要翻译： 用于产生光学正交双二进制QDB信号的光学方法包括：接收正交相移键控QPSK信号，并将相加的延迟加到接收的正交相移键控QPSK信号上以产生光学正交二进制信号。

公开(公告)号：US20120263251A1

公开(公告)日：2012-10-18

申请号：US13270211

申请日：2011-10-10

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

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

IPC分类号： H04L23/02 ,  H04L27/28

CPC分类号： H04L1/0057 ,  H04L1/0042 ,  H04L5/0016 ,  H04L5/04 ,  H04L25/067 ,  H04L27/2628 ,  H04L27/3427

摘要： A coded multidimensional modulation system called generalized OFDM (GOFDM) uses orthogonal subcarriers as bases functions, and the signal constellation points of corresponding multidimensional constellation diagram are obtained as N-dimensional Cartesian product of one-dimensional PAM/two-dimensional QAM. In GOFDM, the N-dimensional/2N-dimensional signal constellation point is transmitted over all N subcarriers/2N-subcarriers, which serve as individual bases functions. Even if some of the subcarriers are severely affected by channel distortion, the overall signal constellation point will face only small distortion, when strong channel capacity achieving channel codes are used. In addition, because the channel capacity is a linear function of number of dimensions, the spectral efficiency of optical transmission systems is significantly improved. Finally, since Euclidean distance of multidimensional signal constellation is much larger that that of two-dimensional signal constellations, OSNR sensitivity is dramatically improved.

摘要翻译： 称为广义OFDM（GOFDM）的编码多维调制系统使用正交子载波作为基本功能，并且获得相应多维星座图的信号星座点作为一维PAM /二维QAM的N维笛卡尔乘积。 在GOFDM中，N维/ 2N维信号星座点在用作各个基本功能的所有N个子载波/ 2N个子载波上发送。 即使某些子载波受到信道失真的严重影响，当使用实现信道码的强信道容量时，整个信号星座点也只会面临小的失真。 另外，由于信道容量是维数的线性函数，所以光传输系统的频谱效率显着提高。 最后，由于多维信号星座的欧几里德距离远大于二维信号星座的距离，因此OSNR灵敏度得到显着提高。