公开(公告)号：US20080063396A1

公开(公告)日：2008-03-13

申请号：US11690926

申请日：2007-03-26

Applicant: Jianjun Yu ,  Lei Xu ,  Philip Nan Ji ,  Ting Wang

Inventor： Jianjun Yu ,  Lei Xu ,  Philip Nan Ji ,  Ting Wang

IPC: H04B10/24

CPC classification number: H04B10/5561 ,  H04B10/505 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/5162 ,  H04B10/5165

Abstract: An apparatus includes a generator for obtaining at least two lightwave carriers from a single lightwave source, at least two modulators for selectively varying the lightwave carriers according to respective data signals; and a coupler for combining the modulated lightwave carriers for optical transmission. The generator can be one of an optical carrier suppression or phase modulation. The apparatus can employ a filter for separating the lightwave carriers by a fixed wavelength spacing before selectively varying the lightwave carriers according to the respective data signals. In an exemplary embodiment of the invention, the respective data signals are two 50 Gbit/s differential quadrature phase key DQPSK signals, each 50 Gbit/s DQPSK signal including a first 25 Gbit/s data signal out of phase with a second 25 Gbit/s data signal for selectively varying a respective one of the two lightwave carriers, and the combined modulated lightwave carriers are a 100 Gbit/s DQPSK signal. Preferably, the apparatus includes a modulator for pulse shaping the lightwave carriers.

Abstract translation: 一种装置包括用于从单个光波源获得至少两个光波载波的发生器，至少两个用于根据相应数据信号选择性地改变光波载波的调制器; 以及用于组合用于光传输的调制光波载波的耦合器。 发生器可以是光载波抑制或相位调制之一。 根据相应的数据信号，在选择性地改变光波载波之前，该装置可以采用用于将光波载波分离固定波长间隔的滤波器。 在本发明的示例性实施例中，相应的数据信号是两个50Gbit / s的差分正交相位键DQPSK信号，每个50Gbit / s的DQPSK信号包括与第二25Gbit / s的第二25Gbit / s数据信号异相， 用于选择性地改变两个光波载波中的相应一个的数据信号，并且组合的调制的光波载波是100Gbit / s的DQPSK信号。 优选地，该装置包括用于对光波载波进行脉冲整形的调制器。

公开(公告)号：US20070292143A1

公开(公告)日：2007-12-20

申请号：US11761021

申请日：2007-06-11

Applicant: Jianjun Yu ,  Lei Xu ,  Ting Wang

Inventor： Jianjun Yu ,  Lei Xu ,  Ting Wang

IPC: H04B10/04

CPC classification number: H04B10/25754

Abstract: 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.

Abstract translation: 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：US20110069964A1

公开(公告)日：2011-03-24

申请号：US12562353

申请日：2009-09-18

Applicant: Jianjun Yu ,  Ting Wang

Inventor： Jianjun Yu ,  Ting Wang

IPC: H04B10/00

CPC classification number: H04B10/90 ,  H04B10/25759

Abstract: An optical wireless network includes an optical coupler for diverting received millimeter-wave signals comprised of an optical carrier and second order sidebands into multiple transmission paths; a downstream optical path being one of the multiple transmission paths and including an optical filter for filtering passing through the optical carrier with a single sideband, a converter for converting the optical carrier and single sideband to a corresponding electrical signal for amplification and broadcast transmission from an antenna; and an upstream path being one of the multiple transmission paths and having a filter for passing through the optical carrier only from the mm-wave signals and an intensity modulator driven by data received over the antenna to modulate the optical carrier for optical transmission to a receiving destination.

Abstract translation: 光无线网络包括用于将接收到的由光载波和二阶边带构成的毫米波信号转换成多个传输路径的光耦合器; 下行光路是多个传输路径之一，并且包括用于通过单个边带通过光载波的滤波器的滤光器，用于将光载波和单边带转换为相应的电信号的转换器，用于放大和广播传输 天线; 并且上游路径是多个传输路径中的一个，并且具有仅从mm波信号通过光载波的滤波器和由天线接收的数据驱动的强度调制器，以将用于光传输的光载波调制到接收 目的地。

公开(公告)号：US20100329696A1

公开(公告)日：2010-12-30

申请号：US12562260

申请日：2009-09-18

Applicant: Jianjun Yu ,  Ting Wang ,  Dayou Qian

Inventor： Jianjun Yu ,  Ting Wang ,  Dayou Qian

IPC: H04B10/04

CPC classification number: H04B10/5053 ,  H04B10/541

Abstract: An optical transmitter including a dividing optical coupler for dividing a lightwave onto optical paths; a first optical modulator in a first of the optical paths and driven by an I component of a first signal and a I component of a second signal for modulating the lightwave, a DC bias of the first optical modulator being at a quadrature point; a second optical modulator in a second of the optical paths and driven by a Q component of the first signal and a Q component of the second signal for modulating the lightwave, a DC bias of the second optical modulator being at the quadrature point; a phase shifter for generating a 90 degree phase shift in the Q components of the first and second signals that are modulated by the second optical coupler; and a combining optical coupler for combining the modulated lightwave from the first optical coupler and the phase shifted Q components of the first and second signals for generating a quadrature amplitude modulated signal.

Abstract translation: 一种光发射机，包括用于将光波分解成光路的分光光耦合器; 在第一光路中的由第一信号的I分量和用于调制光波的第二信号的I分量驱动的第一光调制器，第一光调制器的DC偏置处于正交点; 在第二光路中的第二光调制器，由第一信号的Q分量和第二信号的Q分量驱动，用于调制光波，第二光调制器的DC偏置处于正交点; 移相器，用于产生由第二光耦合器调制的第一和第二信号的Q分量中的90度相移; 以及组合光耦合器，用于组合来自第一光耦合器的调制光波和用于产生正交幅度调制信号的第一和第二信号的相移Q分量。

公开(公告)号：US20100247104A1

公开(公告)日：2010-09-30

申请号：US12698688

申请日：2010-02-02

Applicant: Jianjun Yu ,  Lei Xu ,  Philip Nan Ji ,  Ting Wang

Inventor： Jianjun Yu ,  Lei Xu ,  Philip Nan Ji ,  Ting Wang

IPC: H04B10/00

CPC classification number: H04B10/508 ,  H04B10/2575 ,  H04B10/505 ,  H04J14/02 ,  H04J14/0256

Abstract: 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).

Abstract translation: 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：US20090290877A1

公开(公告)日：2009-11-26

申请号：US12124402

申请日：2008-05-21

Applicant: Jianjun Yu ,  Ting Wang ,  Junqiang Hu

Inventor： Jianjun Yu ,  Ting Wang ,  Junqiang Hu

IPC: H04J14/02

CPC classification number: H04B10/0795 ,  H04L27/2602

Abstract: A method includes coupling an optical signal upconverted to a higher frequency and a digital signal having a bit rate similar to that of a subchannel of the upconverted optical signal, and obtaining, responsive to the coupling, a transmission signal with an optical carrier frequency carrying the digital signal and subchannels about the optical carrier frequency carrying the upconverted optical signal, the bit rate of the optical carrier being similar to that of the subchannels. In a preferred embodiment, the coupling includes electrically power coupling the upconverted optical signal with the digital signal, and modulating the coupled optical carrier frequency carrying the digital signal and subchannels about the optical carrier frequency carrying the upconverted optical signal.

Abstract translation: 一种方法包括将上变频到较高频率的光信号和具有与上变频光信号的子信道的比特率相似的比特率的数字信号耦合，并且响应于耦合获得具有携带 关于携带上变频光信号的光载波频率的数字信号和子信道，光载波的比特率与子信道的比特率相似。 在优选实施例中，耦合包括将上变频的光信号与数字信号进行电功率耦合，以及调制载有数字信号的耦合的光载波频率和携带上变频的光信号的光载波频率的子信道。

公开(公告)号：US20090016739A1

公开(公告)日：2009-01-15

申请号：US11830987

申请日：2007-07-31

Applicant: Jianjun Yu ,  Lei Xu ,  Philip Nan Ji ,  Ting Wang

Inventor： Jianjun Yu ,  Lei Xu ,  Philip Nan Ji ,  Ting Wang

IPC: H04B10/00

CPC classification number: H04B10/25073

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

Abstract translation: 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：US08873970B2

公开(公告)日：2014-10-28

申请号：US12789943

申请日：2010-05-28

Applicant: Jianjun Yu ,  Dayou Qian ,  Philip Nan Ji ,  Ting Wang

Inventor： Jianjun Yu ,  Dayou Qian ,  Philip Nan Ji ,  Ting Wang

IPC: H04B10/04 ,  H04B10/12 ,  H04B10/548 ,  H04J14/06

CPC classification number: H04B10/548 ,  H04J14/06

Abstract: A method for generating a 400 Gb/s single channel optical signal from multiple modulated subchannels includes carving respective modulated subchannels into return-to-zero RZ modulated subchannels having non-overlapping peaks with intensity modulators having a duty cycle less than 50%, and combining the subchannels into a single channel signal aggregating the bit rate of each of the subchannels. The subchannels are combined with a flat top optical component for increased subsequent receiver sensitivity.

Abstract translation: 用于从多个调制子信道生成400Gb / s单信道光信号的方法包括将具有非重叠峰值的相应调制子信道刻蚀成具有占空比小于50％的强度调制器的归零至零RZ调制子信道，以及组合 将子信道转换成单个信道信号，聚合每个子信道的比特率。 子通道与平顶光学部件组合，以增加后续的接收灵敏度。

公开(公告)号：US08761612B2

公开(公告)日：2014-06-24

申请号：US12562260

申请日：2009-09-18

Applicant: Jianjun Yu ,  Ting Wang ,  Dayou Qian

Inventor： Jianjun Yu ,  Ting Wang ,  Dayou Qian

IPC: H04B10/00

CPC classification number: H04B10/5053 ,  H04B10/541

Abstract: An optical transmitter includes a dividing optical coupler, a first optical modulator driven by an I component of a first signal and a I component of a second signal for modulating a lightwave, a DC bias of the first optical, a second optical modulator driven by a Q component of the first signal and a Q component of the second signal for modulating a lightwave, a DC bias of the second optical modulator, a phase shifter, and a combining optical coupler for combining the modulated lightwave from the first optical coupler and the phase shifted Q components of the first and second signals for generating a quadrature amplitude modulated signal.

Abstract translation: 光发射机包括分光光耦合器，由第一信号的I分量驱动的第一光调制器和用于调制光波的第二信号的I分量，第一光学器件的DC偏置，第二光调制器驱动的第二光调制器 第一信号的Q分量和用于调制光波的第二信号的Q分量，第二光调制器的DC偏置，移相器和组合光耦合器，用于组合来自第一光耦合器的调制光波和相位 用于产生正交幅度调制信号的第一和第二信号的移位Q分量。

公开(公告)号：US08463121B2

公开(公告)日：2013-06-11

申请号：US12902801

申请日：2010-10-12

Applicant: Lei Xu ,  Shaoliang Zhang ,  Jianjun Yu ,  Ting Wang

Inventor： Lei Xu ,  Shaoliang Zhang ,  Jianjun Yu ,  Ting Wang

IPC: H04B10/08 ,  H04B10/06

CPC classification number: H04B10/611 ,  H04B10/60 ,  H04B10/6164 ,  H04B10/6165

Abstract: 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.

Abstract translation: 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。