公开(公告)号：US20090245810A1

公开(公告)日：2009-10-01

申请号：US12054763

申请日：2008-03-25

申请人： Yue-Kai Huang ,  Ting Wang ,  Lei Xu

发明人： Yue-Kai Huang ,  Ting Wang ,  Lei Xu

IPC分类号： H04B10/04 ,  H04B10/12

CPC分类号： H04B10/25137 ,  H04B10/2575

摘要： In an optical transmission system, data is transmitted via an optical beam modulated with an arbitrary waveform. The optical beam is transmitted through at least one optical element. Transmission through at least one optical element degrades the signal quality of the initial optical beam. The signal characteristics of at least one optical beam at the output of least one optical element are used as feedback to shape the arbitrary waveform to improve signal characteristics. An arbitrary waveform may be used to compensate signal degradation caused by a multiplexer/demultiplexer in a wavelength division multiplex system.

摘要翻译： 在光传输系统中，通过任意波形调制的光束发送数据。 光束通过至少一个光学元件透射。 通过至少一个光学元件的透射降低了初始光束的信号质量。 在至少一个光学元件的输出处的至少一个光束的信号特性被用作反馈以形成任意波形以改善信号特性。 可以使用任意波形来补偿由波分多路复用系统中的多路复用器/解复用器引起的信号劣化。

公开(公告)号：US20090162066A1

公开(公告)日：2009-06-25

申请号：US12128748

申请日：2008-05-29

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： H04J14/02

CPC分类号： G02B6/29386 ,  G02B6/29335 ,  G02B6/2935 ,  G02B6/29358 ,  H04B10/25073 ,  H04J14/02

摘要： An apparatus includes an interleaver configuration for at least one of combining or separating odd and even channel groups to achieve channel density doubling; and an optical equalizer for suppressing inter symbol interference within the channels to provide intra-channel equalizing in the optical path, the equalizer being integrated into the interleaver. Preferably, optical equalizer and interleaver are integrated together as a single monolithic device, the optical equalizer includes a passband that has a dip in the channel center to achieve a raised-cosine filtering profile in the optical signal path to achieve inter-symbol interference ISI suppression, and the equalizer includes integration into the optical path of the interleaver to realize a monolithic device combining or separating odd and even channel groups to achieve channel density doubling. Preferably, also, the optical equalizer includes a first equalizer with half the depth of required ripple dips at both a first output port and an input port and a second equalizer with half the depth of required ripple dips at a second output port.

摘要翻译： 一种装置包括用于组合或分离奇数和偶数信道组中的至少一个的交织器配置，以实现信道密度倍增; 以及光学均衡器，用于抑制信道内的符号间干扰，以在光路中提供信道间均衡，均衡器被集成到交织器中。 优选地，光学均衡器和交织器作为单个单片器件集成在一起，光学均衡器包括通道，该通带在信道中心具有下降以在光信号路径中实现升余弦滤波曲线，以实现符号间干扰ISI抑制 并且均衡器包括集成到交织器的光路中，以实现组合或分离奇数和偶数信道组的单片设备，以实现信道密度加倍。 优选地，光学均衡器还包括第一均衡器，其具有在第一输出端口和输入端口处的所需波纹下降的一半深度，以及在第二输出端口处具有所需纹波下降的一半深度的第二均衡器。

公开(公告)号：US07529484B2

公开(公告)日：2009-05-05

申请号：US11276486

申请日：2006-03-02

申请人： Lei Xu ,  Lei Zong ,  Philip Nan Ji ,  Ting Wang ,  Yuji Abe

发明人： Lei Xu ,  Lei Zong ,  Philip Nan Ji ,  Ting Wang ,  Yuji Abe

IPC分类号： H04J14/00 ,  H04J14/02

CPC分类号： H04J14/0226 ,  H04B10/40 ,  H04J14/0232 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0282 ,  H04J14/0298

摘要： An optical triplexer transceiver that utilizes parallel signal detection for use in broadband passive optical networks (B-PONs). The triplexer transceiver includes an optical filter comprising a first port coupled to a laser for receiving upstream optical data signals, a second port for passing the upstream optical data signals to a network, and for receiving combined downstream optical data and video signals from the network, the video signals modulated by subcarrier modulation (SCM), and a third port for communicating the combined downstream optical data and video signals to a photodetector constructed and arranged for simultaneously receiving the combined downstream optical data and video signals and converting the optical data and video signals to electrical signals. A plurality of filters are coupled to the photodetector for separating the combined downstream data and video signals, including a low-pass filter for passing the downstream data signals, and a band-pass filter for passing the video signals. The video signals are coherently detected in a number of stages corresponding to stages of SCM applied to the video signals. The triplexer transceiver is adapted to receive optical video signals that have been subjected first and second stages of SCM to move the spectra of the SCM video signals to a higher frequency range that does not overlap with a frequency range of the baseband data signals.

摘要翻译： 一种使用并行信号检测用于宽带无源光网络（B-PON）的光学三重收发器。 三重收发器包括光滤波器，其包括耦合到激光器的第一端口用于接收上游光数据信号，用于将上游光数据信号传递到网络的第二端口，以及用于从网络接收组合的下行光数据和视频信号， 通过副载波调制（SCM）调制的视频信号和用于将组合的下行光数据和视频信号传送到光电探测器的第三端口，该光电探测器被构造和布置成同时接收组合的下行光数据和视频信号并转换光数据和视频信号 到电信号。 多个滤波器耦合到光电检测器，用于分离组合的下行数据和视频信号，包括用于通过下行数据信号的低通滤波器和用于传递视频信号的带通滤波器。 视频信号在对应于应用于视频信号的单片机的阶段的多个级中被相干检测。 三重收发器适于接收已经经历SCM的第一和第二级的光学视频信号，以将SCM视频信号的频谱移动到与基带数据信号的频率范围不重叠的较高频率范围。

公开(公告)号：US20090092393A1

公开(公告)日：2009-04-09

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： H04J11/00 ,  H04B10/06

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：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：US20070133987A1

公开(公告)日：2007-06-14

申请号：US11276486

申请日：2006-03-02

申请人： Lei Xu ,  Lei Zong ,  Philip Ji ,  Ting Wang ,  Yuji Abe

发明人： Lei Xu ,  Lei Zong ,  Philip Ji ,  Ting Wang ,  Yuji Abe

IPC分类号： H04J14/00

CPC分类号： H04J14/0226 ,  H04B10/40 ,  H04J14/0232 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0282 ,  H04J14/0298

摘要： An optical triplexer transceiver that utilizes parallel signal detection for use in broadband passive optical networks (B-PONs). The triplexer transceiver includes an optical filter comprising a first port coupled to a laser for receiving upstream optical data signals, a second port for passing the upstream optical data signals to a network, and for receiving combined downstream optical data and video signals from the network, the video signals modulated by subcarrier modulation (SCM), and a third port for communicating the combined downstream optical data and video signals to a photodetector constructed and arranged for simultaneously receiving the combined downstream optical data and video signals and converting the optical data and video signals to electrical signals. A plurality of filters are coupled to the photodetector for separating the combined downstream data and video signals, including a low-pass filter for passing the downstream data signals, and a band-pass filter for passing the video signals. The video signals are coherently detected in a number of stages corresponding to stages of SCM applied to the video signals. The triplexer transceiver is adapted to receive optical video signals that have been subjected first and second stages of SCM to move the spectra of the SCM video signals to a higher frequency range that does not overlap with a frequency range of the baseband data signals.

摘要翻译： 一种使用并行信号检测用于宽带无源光网络（B-PON）的光学三重收发器。 三重收发器包括光滤波器，其包括耦合到激光器的第一端口用于接收上游光数据信号，用于将上游光数据信号传递到网络的第二端口，以及用于从网络接收组合的下行光数据和视频信号， 通过副载波调制（SCM）调制的视频信号和用于将组合的下行光数据和视频信号传送到光电探测器的第三端口，该光电探测器被构造和布置成同时接收组合的下行光数据和视频信号并转换光数据和视频信号 到电信号。 多个滤波器耦合到光电检测器，用于分离组合的下行数据和视频信号，包括用于通过下行数据信号的低通滤波器和用于传递视频信号的带通滤波器。 视频信号在对应于应用于视频信号的单片机的阶段的多个级中被相干检测。 三重收发器适于接收已经经历SCM的第一和第二级的光学视频信号，以将SCM视频信号的频谱移动到与基带数据信号的频率范围不重叠的较高频率范围。

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：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。