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1. 发明授权

US09369228B2 Method and apparatus for heterodyne coherent detection 有权
标题翻译：用于外差相干检测的方法和装置
公开(公告)号：US09369228B2
公开(公告)日：2016-06-14
申请号：US13966845
申请日：2013-08-14
申请人： ZTE (USA) INC.
发明人： Jianjun Yu , Ze Dong , Hung-Chang Chien
IPC分类号： H04B10/06 , H04J14/08 , H04J14/02 , H04J14/06 , H04B10/61 , H04B10/64
CPC分类号： H04J14/08 , H04B10/614 , H04B10/64 , H04J14/02 , H04J14/06
摘要： A simplified coherent receiver based on heterodyne detection with only two balanced photo detectors (PD) and two analog-to-digital converters (ADC) is disclosed. The polarization diversity hybrid can be simplified relative to the conventional one. The detected intermediate frequency signals are first down converted to baseband with I/Q separation.
摘要翻译：公开了一种基于仅使用两个平衡光电检测器（PD）和两个模拟 - 数字转换器（ADC）的外差检测的简化相干接收机。相对于传统的偏振分集混合可以简化。检测到的中频信号首先通过I / Q分离下变频到基带。

2. 发明授权

US09825707B2 System and method for coherent detection with digital signal procession 有权
公开(公告)号：US09825707B2
公开(公告)日：2017-11-21
申请号：US14377685
申请日：2013-02-08
申请人： ZTE (USA) Inc. , Jianjun Yu , Jianqiang Li , Hung-chang Chien , Zhensheng Jia
发明人： Jianjun Yu , Jianqiang Li , Hung-Chang Chien , Zhensheng Jia
IPC分类号： H04B10/2507 , H04B1/50 , H04B10/548 , H04L27/26 , H04L27/20 , H04L25/03 , H04J14/02 , H04B10/50
CPC分类号： H04B10/2507 , H04B10/50 , H04B10/548 , H04J14/0298 , H04L25/03178 , H04L27/2096 , H04L27/2601 , H04L27/2627 , H04L27/2697 , H04L2025/03414
摘要： Aspects of the present invention include apparatus and methods for transmitting and receiving signals in communication systems. A multicarrier generator generates a multicarrier signal. An optical demultiplexer separates the multicarrier signal into separate multicarrier signals. At least one QPSK modulator modulates signals from the separate multicarrier signals. An optical multiplexer combines the QPSK modulated signals into a multiplexed signal. The multiplexed signal is then transmitted.

3. 发明授权

US09584223B2 Digital generation of multi-carrier optical signals 有权
标题翻译：数字生成多载波光信号
公开(公告)号：US09584223B2
公开(公告)日：2017-02-28
申请号：US14302333
申请日：2014-06-11
申请人： ZTE (USA) Inc.
发明人： Hung-Chang Chien , Zhensheng Jia , Jianjun Yu
IPC分类号： H04B10/04 , H04B10/50 , H04B10/516 , H04B10/548
CPC分类号： H04B10/506 , H04B10/5165 , H04B10/548
摘要： A transmitter of optical signals uses a single light transmitter to modulate a multi-carrier signal. The multi-carrier signal is generated by performing digital signal processing in the digital domain to generate a plurality of components by performing Hilbert transform filtering. The components are modulated on to an optical transmitter as in-phase and quadrature components, thereby generating a multi-carrier waveform using a single optical transmitter.
摘要翻译：光信号的发射机使用单个光发射机来调制多载波信号。通过在数字域中进行数字信号处理来生成多载波信号，以通过执行希尔伯特变换滤波来生成多个分量。这些分量作为同相和正交分量被调制到光发射机，由此使用单个光发射机产生多载波波形。

4. 发明申请

US20130223843A1 NYQUIST WAVELENGTH DIVISION MULTIPLEXING SYSTEM 有权
标题翻译： NYQUIST波段多路复用系统
公开(公告)号：US20130223843A1
公开(公告)日：2013-08-29
申请号：US13778434
申请日：2013-02-27
申请人： ZTE (USA) INC.
发明人： Zhensheng Jia , Jianjun Yu , Hung-Chang Chien
IPC分类号： H04J14/02
CPC分类号： H04J14/02 , H04J14/0254 , H04J14/06
摘要： Aspects of the present invention include apparatus and methods for transmitting and receiving signals in communication systems. A beam splitter splits an optical signal into a plurality of signals. At least one QPSK modulator generates a plurality of QPSK modulated signals from the plurality of signals. An optical multiplexer combines the plurality of QPSK modulated signals into a multiplexed signal. The multiplexed signal is then transmitted.
摘要翻译：本发明的方面包括在通信系统中发送和接收信号的装置和方法。分束器将光信号分离成多个信号。至少一个QPSK调制器从多个信号产生多个QPSK调制信号。光复用器将多个QPSK调制信号组合成复用信号。然后发送复用的信号。

5. 发明申请

US20180294880A1 SYSTEM AND METHOD FOR COHERENT DETECTION WITH DIGITAL SIGNAL PROCESSION 审中-公开
公开(公告)号：US20180294880A1
公开(公告)日：2018-10-11
申请号：US15850782
申请日：2017-12-21
申请人： ZTE (USA) Inc.
发明人： JIANJUN YU , Jianqiang Li , Hung-Chang Chien , Zhensheng Jia
IPC分类号： H04B10/2513 , H04L27/26 , H04B10/61 , H04J14/02 , H04B10/516 , H04B10/50 , H04J14/06
CPC分类号： H04B10/548 , H04B10/5561 , H04B10/613 , H04L27/2637 , H04L27/2697
摘要： Methods and apparatus to realize high spectral efficiency in optical signals transmitted over long distances.

6. 发明授权

US09880351B2 Directly-modulated multi-polarization optical transmitters 有权
公开(公告)号：US09880351B2
公开(公告)日：2018-01-30
申请号：US14254296
申请日：2014-04-16
申请人： ZTE (USA) INC.
发明人： Hung-Chang Chien , Zhensheng Jia , Jianjun Yu
IPC分类号： H04B10/00 , G02B6/10 , H04B10/50 , H04B10/532 , H04B10/556
CPC分类号： G02B6/105 , H04B10/5053 , H04B10/532 , H04B10/5561
摘要： The present invention relates to optical transmitters, transceivers, and transponders used for transmission of information or data in any form through a physical medium dependent (PMD) network. The speed of such networks depends, in part, on the density of information that can be transmitted through the physical medium. Optical transmitters or transceivers can be used to transmit multiple independent signals simultaneously through the same medium using different directions or axes of polarization, where the difference in the directions or axes of polarization can be used to distinguish the multiple signals at the receiver. In this invention, we use a master laser (l0) to synchronize two slave lasers (l1 and l2) by its x-polarization and y-polarization components of carrier, respectively, so that two slave lasers can be enforced to lock on exactly the same wavelength l0 with perpendicular polarization directions.

7. 发明申请

US20140314368A1 DIRECTLY-MODULATED MULTI-POLARIZATION OPTICAL TRANSMITTERS 有权
标题翻译：直接调制多极化光学发射器
公开(公告)号：US20140314368A1
公开(公告)日：2014-10-23
申请号：US14254296
申请日：2014-04-16
申请人： ZTE (USA) INC.
发明人： Hung-Chang Chien , Zhensheng Jia , Jianjun Yu
IPC分类号： G02B6/10
CPC分类号： G02B6/105 , H04B10/5053 , H04B10/532 , H04B10/5561
摘要： The present invention relates to optical transmitters, transceivers, and transponders used for transmission of information or data in any form through a physical medium dependent (PMD) network. The speed of such networks depends, in part, on the density of information that can be transmitted through the physical medium. Optical transmitters or transceivers can be used to transmit multiple independent signals simultaneously through the same medium using different directions or axes of polarization, where the difference in the directions or axes of polarization can be used to distinguish the multiple signals at the receiver. In this invention, we use a master laser (l0) to synchronize two slave lasers (l1 and l2) by its x-polarization and y-polarization components of carrier, respectively, so that two slave lasers can be enforced to lock on exactly the same wavelength l0 with perpendicular polarization directions.
摘要翻译：本发明涉及用于通过物理介质依赖（PMD）网络以任何形式传输信息或数据的光发射机，收发机和应答器。这种网络的速度部分取决于可以通过物理介质传输的信息的密度。光发射器或收发器可用于通过使用不同方向或偏振轴的同一介质同时传输多个独立信号，其中极化方向或偏心轴的差异可用于区分接收器处的多个信号。在本发明中，我们使用主激光器（10）来分别使两个从属激光器（l1和l2）分别乘以载波的x偏振和y偏振分量，从而可以强制执行两个从属激光器来精确地锁定具有垂直偏振方向的相同波长l0。

8. 发明申请

US20140099108A1 SYSTEM AND METHOD FOR HETERODYNE COHERENT DETECTION WITH OPTIMAL OFFSET 有权
标题翻译：用于异位相关检测的系统和方法与最佳偏移
公开(公告)号：US20140099108A1
公开(公告)日：2014-04-10
申请号：US14045992
申请日：2013-10-04
申请人： ZTE (USA) INC.
发明人： Jianjun Yu , Ze Dong , Hung-Chang Chien
IPC分类号： H04B10/61
CPC分类号： H04B10/614 , H04B10/64
摘要： A heterodyne optical signal detector and method performed thereby, the signal detector including an optical signal spectrum shaper operable to modify the shape of the frequency spectrum of a received optical signal, a laser local oscillator (LO), and polarization beam splitters (PBSs) to divide the signal and the LO into orthogonal components, waveguides in which intermediate frequency (IF) signals are formed, balanced photodetectors (BPDs) arranged to receive the IF signals and operable to convert the IF signals into electric signals, and analog to digital converters (ADCs) that digitize the electric signals. In embodiments, the ADCs have a predetermined bandwidth, the received signal has a spectrum which, if not shaped, would produce IF signals with a bandwidth greater than that of the ADCs, the spectrum shaper modifies the received signal spectrum to produce IF signals that have a bandwidth substantially equal to half the bandwidth of the ADCs, the laser frequency is adjusted produce IF signals in the waveguides having a frequency spectrum centered at the midpoint of the ADCs' bandwidth.
摘要翻译：一种外差光信号检测器和由此执行的方法，所述信号检测器包括可操作以修改所接收的光信号的频谱的形状的光信号频谱整形器，激光本地振荡器（LO）和偏振分束器（PBS）至将信号和LO分成正交分量，其中形成中频（IF）信号的波导，布置成接收IF信号并可操作以将IF信号转换成电信号的平衡光电检测器（BPD）和模数转换器 ADC），数字化电信号。在实施例中，ADC具有预定带宽，所接收的信号具有频谱，如果不成形，将产生带宽大于ADC的带宽的IF信号，频谱整形器修改接收信号频谱以产生具有带宽基本上等于ADC的一半带宽，激光频率被调整，在具有以ADC的带宽中点为中心的频谱的波导中产生IF信号。

9. 发明授权

US09391731B2 Nyquist wavelength division multiplexing system 有权
标题翻译：奈奎斯特波分复用系统
公开(公告)号：US09391731B2
公开(公告)日：2016-07-12
申请号：US13778434
申请日：2013-02-27
申请人： ZTE (USA) Inc.
发明人： Zhensheng Jia , Jianjun Yu , Hung-Chang Chien
IPC分类号： H04B10/61 , H04B10/60 , H04J14/02 , H04J14/06
CPC分类号： H04J14/02 , H04J14/0254 , H04J14/06
摘要： Aspects of the present invention include apparatus and methods for transmitting and receiving signals in communication systems. A beam splitter splits an optical signal into a plurality of signals. At least one QPSK modulator generates a plurality of QPSK modulated signals from the plurality of signals. An optical multiplexer combines the plurality of QPSK modulated signals into a multiplexed signal. The multiplexed signal is then transmitted.
摘要翻译：本发明的方面包括在通信系统中发送和接收信号的装置和方法。分束器将光信号分离成多个信号。至少一个QPSK调制器从多个信号产生多个QPSK调制信号。光复用器将多个QPSK调制信号组合成复用信号。然后发送复用的信号。

10. 发明授权

US09209908B2 System and method for heterodyne coherent detection with optimal offset 有权
标题翻译：用于具有最佳偏移量的外差相干检测的系统和方法
公开(公告)号：US09209908B2
公开(公告)日：2015-12-08
申请号：US14045992
申请日：2013-10-04
申请人： ZTE (USA) INC.
发明人： Jianjun Yu , Ze Dong , Hung-Chang Chien
IPC分类号： H04B10/06 , H04B10/61 , H04B10/64
CPC分类号： H04B10/614 , H04B10/64
摘要： A heterodyne optical signal detector and method performed thereby, the signal detector including an optical signal spectrum shaper operable to modify the shape of the frequency spectrum of a received optical signal, a laser local oscillator (LO), and polarization beam splitters (PBSs) to divide the signal and the LO into orthogonal components, waveguides in which intermediate frequency (IF) signals are formed, balanced photodetectors (BPDs) arranged to receive the IF signals and operable to convert the IF signals into electric signals, and analog to digital converters (ADCs) that digitize the electric signals. In embodiments, the ADCs have a predetermined bandwidth, the received signal has a spectrum which, if not shaped, would produce IF signals with a bandwidth greater than that of the ADCs, the spectrum shaper modifies the received signal spectrum to produce IF signals that have a bandwidth substantially equal to half the bandwidth of the ADCs, the laser frequency is adjusted produce IF signals in the waveguides having a frequency spectrum centered at the midpoint of the ADCs' bandwidth.
摘要翻译：一种外差光信号检测器和由此执行的方法，所述信号检测器包括可操作以修改所接收的光信号的频谱的形状的光信号频谱整形器，激光本地振荡器（LO）和偏振分束器（PBS）至将信号和LO分成正交分量，其中形成中频（IF）信号的波导，布置成接收IF信号并可操作以将IF信号转换成电信号的平衡光电检测器（BPD）和模数转换器 ADC），数字化电信号。在实施例中，ADC具有预定带宽，所接收的信号具有频谱，如果不成形，将产生带宽大于ADC的带宽的IF信号，频谱整形器修改接收信号频谱以产生具有带宽基本上等于ADC的一半带宽，激光频率被调整，在具有以ADC的带宽中点为中心的频谱的波导中产生IF信号。

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