公开(公告)号：US20070292143A1

公开(公告)日：2007-12-20

申请号：US11761021

申请日：2007-06-11

申请人： Jianjun Yu ,  Lei Xu ,  Ting Wang

发明人： Jianjun Yu ,  Lei Xu ,  Ting Wang

IPC分类号： H04B10/04

CPC分类号： H04B10/25754

摘要： An apparatus includes multiple signal paths for optically converting an optical signal to multiples of the optical signal at different respective carrier frequencies for reducing interference between wireless transmissions of the multiples of the optical signal. Preferably, the converting includes a first modulator for modulating the optical signal into a first optical carrier and an initial first-order sideband signal with a frequency spacing twice that of the first optical carrier and a first interleaver for separating the first optical carrier and the initial first-order sideband signal. The converting also includes a second phase modulator for modulating the first optical carrier into a second optical carrier and a second first-order sideband signal with a frequency spacing twice that of the second optical carrier.

摘要翻译： 一种装置包括多个信号路径，用于将光信号光学地转换成不同相应载波频率处的光信号的倍数，以减少光信号的倍数的无线传输之间的干扰。 优选地，转换包括用于将光信号调制成第一光载波的第一调制器和具有两倍于第一光载波的频率间隔的初始一阶边带信号和用于分离第一光载波的初始交织器和初始 一阶边带信号。 转换还包括用于将第一光载波调制成第二光载波的第二相位调制器和频率间隔是第二光载波的频率间隔的第二一阶边带信号。

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：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：US20100247104A1

公开(公告)日：2010-09-30

申请号：US12698688

申请日：2010-02-02

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

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

IPC分类号： H04B10/00

CPC分类号： H04B10/508 ,  H04B10/2575 ,  H04B10/505 ,  H04J14/02 ,  H04J14/0256

摘要： A method of generating a dark-RZ pulse in an optical communications system with a dual-arm modulator by setting a direct current bias on the modulator to a specific value such that an output optical power from the modulator achieves a maximum value when the RF signals on the first and second arms of the modulator are off and maintaining the direct current bias at the specific value and applying RF signals to the first and second arms of the modulator and delaying one of the RF signals applied to one of the first and second arms relative to the other of the RF signals such that a dark-RZ pulse is generated with a duty cycle based on the delay. Another aspect of the invention provides a method for generating dense wave division multiplexing (DWDM) optical mm-waves in an optical transmission system by phase modulated DWDM optical signal and applying the phase modulated DWDM optical signal to an input port of an optical interleaver, the optical interleaver having a specified bandwidth to suppress the optical carriers and convert the DWDM optical signal to DWDM optical mm-waves; and amplifying the DWDM optical mm-waves and transmitting the DWDM optical mm-waves over single mode fiber (SMF).

摘要翻译： 一种在具有双臂调制器的光通信系统中通过将调制器上的直流偏置设置为特定值来产生暗RZ脉冲的方法，使得来自调制器的输出光功率在RF信号 在调制器的第一和第二臂处关闭并将直流偏压保持在特定值并且将RF信号施加到调制器的第一和第二臂并且延迟施加到第一和第二臂之一的RF信号之一 相对于RF信号中的另一个，使得以基于延迟的占空比产生暗RZ脉冲。 本发明的另一方面提供了一种通过相位调制DWDM光信号在光传输系统中产生密集波分复用（DWDM）光学毫米波的方法，并将相位调制的DWDM光信号应用于光交织器的输入端口， 具有指定带宽的光交错器以抑制光载波并将DWDM光信号转换为DWDM光学毫米波; 并放大DWDM光学毫米波，并通过单模光纤（SMF）传输DWDM光学毫米波。

公开(公告)号：US20100232803A1

公开(公告)日：2010-09-16

申请号：US12731869

申请日：2010-03-25

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： H04B10/12

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：US20090016739A1

公开(公告)日：2009-01-15

申请号：US11830987

申请日：2007-07-31

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

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

IPC分类号： H04B10/00

CPC分类号： H04B10/25073

摘要： A passive optical equalizer and a predistortion technique are employed to reduce pattern effect in optical signals which result from narrow filtering.

摘要翻译： 采用无源光学均衡器和预失真技术来减少由窄滤波引起的光信号中的图案效应。

公开(公告)号：US09130679B1

公开(公告)日：2015-09-08

申请号：US13437502

申请日：2012-04-02

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

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

IPC分类号： H04B10/04 ,  H04B10/524 ,  H04B10/556 ,  H04B10/532 ,  H04L27/20

CPC分类号： H04B10/524 ,  H04B10/532 ,  H04B10/556 ,  H04B10/5561 ,  H04L25/4923 ,  H04L27/20 ,  H04L27/2075

摘要： Methods and systems for transmission and reception of ternary phase-shift keyed data that include mapping triplets of binary bits to pairs of ternary symbols, such that three bits of data are encoded across two symbols having three-point constellations; modulating the pairs of ternary symbols onto a carrier; and transmitting the modulated carrier across a transmission medium.

摘要翻译： 用于发送和接收三进制移相键控数据的方法和系统，包括将二进制位的三元组映射到三进制符号对，使得三位数据在具有三点星座的两个符号之间被编码; 将三元符号对调制到载体上; 以及在传输介质上传送调制载波。

公开(公告)号：US08515292B2

公开(公告)日：2013-08-20

申请号：US12938738

申请日：2010-11-03

申请人： Lei Xu ,  Shaoling Zhang ,  Ting Wang

发明人： Lei Xu ,  Shaoling Zhang ,  Ting Wang

IPC分类号： H04B10/06 ,  H04B10/00

CPC分类号： H04L27/223 ,  H04L1/0045 ,  H04L1/0057 ,  H04L27/2275 ,  H04L27/3836 ,  H04L2027/0055 ,  H04L2027/0067

摘要： Methods and systems for normalized least mean square phase estimation are shown that include receiving optical transmissions that include a modulated signal, determining a step size based on a signal-to-noise ratio (SNR) and a laser linewidth that provides a balance between convergence speed and precision, estimating phase error using the determined step size, derotating the modulated signal to remove the estimated phase error, and demodulating the derotated signal to produce a bitstream.

摘要翻译： 示出了用于归一化的最小均方相位估计的方法和系统，其包括接收包括调制信号的光传输，基于信噪比（SNR）确定步长，以及提供收敛速度之间的平衡的激光线宽 和精确度，使用所确定的步长估计相位误差，解调调制信号以去除估计的相位误差，以及解调解旋信号以产生比特流。