公开(公告)号：US20110158654A1

公开(公告)日：2011-06-30

申请号：US12982002

申请日：2010-12-30

申请人： Xinliang ZHANG ,  Yu YU ,  Lun WEI ,  Lijun LI

发明人： Xinliang ZHANG ,  Yu YU ,  Lun WEI ,  Lijun LI

IPC分类号： H04B10/02 ,  H04L27/20 ,  H04L27/10

CPC分类号： H04B10/5053 ,  H04B10/5055 ,  H04B10/5561 ,  H04B10/677 ,  H04J14/02 ,  H04J14/0279 ,  H04J14/0282 ,  H04J14/06 ,  H04J14/08

摘要： A differential quadrature phase shift keying (DQPSK) system, method, and device are disclosed. The DQPSK system includes: a transmitter, configured to: pre-code an input first signal and second signal, and generate an in-phase signal and a quadrature signal; modulate the in-phase signal to generate a first differential phase shift keying (DPSK) signal, and modulate the quadrature signal to generate a second DPSK signal; perform a 90 degree phase shift on the first DPSK signal or the second DPSK signal, and interfere with the other DPSK signal to obtain a DQPSK signal; and send the DQPSK signal to a receiver; the receiver, configured to: demodulate the DQPSK signal sent from the transmitter in detuned filter mode, and restore the first signal and the second signal through optical/electrical (o/E) conversion. With the present invention, the accurate control on the phase difference between two arms of an Asymmetric Mach-Zehnder Interferometer (AMZI) is avoided, thus facilitating the signal control and adjustment, and greatly lowering the system cost.

摘要翻译： 公开了差分正交相移键控（DQPSK）系统，方法和装置。 DQPSK系统包括：发射机，被配置为：对输入的第一信号和第二信号进行预编码，并产生同相信号和正交信号; 调制同相信号以产生第一差分相移键控（DPSK）信号，并调制正交信号以产生第二DPSK信号; 对第一DPSK信号或第二DPSK信号执行90度相移，并干扰其他DPSK信号以获得DQPSK信号; 并将DQPSK信号发送到接收机; 所述接收器被配置为：以失谐滤波器模式解调从所述发射机发送的DQPSK信号，并且通过光/电（o / E）转换恢复所述第一信号和所述第二信号。 利用本发明，避免了对非对称马赫 - 曾德干涉仪（AMZI）的两臂之间的相位差的精确控制，从而便于信号的控制和调节，并大大降低了系统成本。

公开(公告)号：US20090127443A1

公开(公告)日：2009-05-21

申请号：US12269502

申请日：2008-11-12

申请人： Yue LIU ,  Lijun LI ,  Zhihui TAO ,  Wei FU

发明人： Yue LIU ,  Lijun LI ,  Zhihui TAO ,  Wei FU

IPC分类号： G01J5/08

CPC分类号： H04B10/07951

摘要： The present invention discloses a method for detecting dispersion, overcoming disadvantages of complex configuration and insensitivity to a tiny dispersion of the method and device for detecting dispersion in the prior art. The inventive method includes: obtaining a signal within a predetermined bandwidth range from an optical signal received; obtaining an operated value of power via an operation on the signal within the predetermined bandwidth range; and obtaining amount of system dispersion according to a corresponding relation between the operated value of power and the amount of system dispersion. A device for detecting dispersion is disclosed, including a photoelectric filter operational unit and a processing unit, where an output of the photoelectric filter operational unit is connected to an input of the processing unit. The device for detecting dispersion of the present invention is applicable to an adaptive dispersion compensation system. An optical signal transmission system is further disclosed.

摘要翻译： 本发明公开了一种检测色散的方法，克服了现有技术中用于检测色散的方法和装置的微分散的复杂配置和不敏感的缺点。 本发明的方法包括：从接收的光信号获得在预定带宽范围内的信号; 通过对所述预定带宽范围内的信号进行操作来获得功率的操作值; 并根据操作的功率值和系统色散量之间的对应关系获得系统色散量。 公开了一种用于检测色散的装置，包括光电过滤器操作单元和处理单元，其中光电过滤器操作单元的输出连接到处理单元的输入。 用于检测本发明的色散的装置可应用于自适应色散补偿系统。 进一步公开了一种光信号传输系统。

公开(公告)号：US20120027406A1

公开(公告)日：2012-02-02

申请号：US13253744

申请日：2011-10-05

申请人： Yue LIU ,  Lijun LI ,  Zhihui TAO ,  Wei FU

发明人： Yue LIU ,  Lijun LI ,  Zhihui TAO ,  Wei FU

IPC分类号： H04B10/08

CPC分类号： H04B10/07951

摘要： The present invention discloses a method for detecting dispersion, overcoming disadvantages of complex configuration and insensitivity to a tiny dispersion of the method and device for detecting dispersion in the prior art. The inventive method includes: obtaining a signal within a predetermined bandwidth range from an optical signal received; obtaining an operated value of power via an operation on the signal within the predetermined bandwidth range; and obtaining amount of system dispersion according to a corresponding relation between the operated value of power and the amount of system dispersion. A device for detecting dispersion is disclosed, including a photoelectric filter operational unit and a processing unit, where an output of the photoelectric filter operational unit is connected to an input of the processing unit. The device for detecting dispersion of the present invention is applicable to an adaptive dispersion compensation system. An optical signal transmission system is further disclosed.

摘要翻译： 本发明公开了一种检测色散的方法，克服了现有技术中用于检测色散的方法和装置的微分散的复杂配置和不敏感的缺点。 本发明的方法包括：从接收的光信号获得在预定带宽范围内的信号; 通过对所述预定带宽范围内的信号进行操作来获得功率的操作值; 并根据操作的功率值和系统色散量之间的对应关系获得系统色散量。 公开了一种用于检测色散的装置，包括光电过滤器操作单元和处理单元，其中光电过滤器操作单元的输出连接到处理单元的输入。 用于检测本发明的色散的装置可应用于自适应色散补偿系统。 进一步公开了一种光信号传输系统。