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    Method and apparatus for improving spectral efficiency in wavelength division multiplexed transmission systems
    1.
    发明授权
    Method and apparatus for improving spectral efficiency in wavelength division multiplexed transmission systems 失效
    提高波分复用传输系统频谱效率的方法和装置

    公开(公告)号：US6134033A

    公开(公告)日：2000-10-17

    申请号：US31018

    申请日：1998-02-26

    Applicant: Neal S. Bergano ,  Carl R. Davidson

    Inventor： Neal S. Bergano ,  Carl R. Davidson

    IPC: H04B10/2507 ,  H04B10/2563 ,  H04B10/50 ,  H04B10/532 ,  H04J14/02 ,  H04J14/06

    CPC classification number: H04B10/2507 ,  H04B10/2563 ,  H04B10/503 ,  H04B10/505 ,  H04B10/5051 ,  H04B10/506 ,  H04B10/532 ,  H04J14/06 ,  H04J14/02

    Abstract: A method and apparatus is provided for transmitting an optical signal. The method includes the step of generating an optical signal that includes a plurality of optical channels, which are sequentially numbered from 1 to N from lowest to highest wavelength. A state-of-polarization of predetermined odd-numbered channels is oriented to be substantially orthogonal to a state of polarization of predetermined even-numbered channels by directing the predetermined odd-numbered channels and the predetermined even-numbered channels through orthogonally polarizing inputs of a polarization coupler. The odd-numbered channels and the even-numbered channels may be directed through first and second wavelength combiners, respectively, prior to orienting their states of polarization. The orthogonal relationship between the states of polarization of odd and even-numbered channels advantageously limits the four-wave mixing products that can be generated in the optical transmitter and the optical transmission path to which it is typically coupled.

    Abstract translation: 提供一种发送光信号的方法和装置。 该方法包括产生包括多个光通道的光信号的步骤，它们从最低到最高波长从1到N顺序编号。 通过将预定的奇数通道和预定的偶数通道通过正交通道的正交极化输入引导，预定的奇数通道的极化状态被定向为基本上与预定偶数通道的极化状态正交 偏振耦合器。 在定向其偏振状态之前，奇数通道和偶数通道可分别被引导通过第一和第二波长组合器。 奇数和偶数通道的极化状态之间的正交关系有利地限制了可以在光发射器中产生的四波混频产物和通常耦合到其中的光传输路径。

    Wavelength division multiplexed system employing optimal channel modulation
    2.
    发明授权
    Wavelength division multiplexed system employing optimal channel modulation 失效
    采用最优信道调制的波分复用系统

    公开(公告)号：US5946119A

    公开(公告)日：1999-08-31

    申请号：US799728

    申请日：1997-02-12

    Applicant: Neal S. Bergano ,  Carl R. Davidson ,  Stephen G. Evangelides, Jr.

    Inventor： Neal S. Bergano ,  Carl R. Davidson ,  Stephen G. Evangelides, Jr.

    IPC: H04B10/155 ,  H04J14/02 ,  H04B10/04

    CPC classification number: H04B10/50593 ,  H04B10/505 ,  H04B10/5051 ,  H04B10/5161 ,  H04B10/532 ,  H04B10/541 ,  H04B10/548 ,  H04J14/02

    Abstract: An apparatus is provided for transmitting an optical signal. The apparatus includes an optical signal source for generating an optical signal having a plurality of optical channels onto which data is modulated at a plurality of predetermined frequencies to provide a plurality of optical data channels. An amplitude modulator is coupled to the optical signal source for modulating each of the optical channels with a waveform that is independently adjustable from one another. A clock, coupled to the amplitude modulator, has a plurality of frequencies that respectively determine the modulation frequencies imparted to the plurality of optical channels by the amplitude modulator. Each of the frequencies of the clock is phase locked and equal to its respective predetermined frequency at which is data is modulated.

    Abstract translation: 提供一种用于发送光信号的装置。 该装置包括用于产生具有多个光信道的光信号的光信号源，数据以多个预定频率被调制到其上以提供多个光数据信道。 幅度调制器耦合到光信号源，用于以彼此独立调节的波形调制每个光通道。 耦合到幅度调制器的时钟具有分别由幅度调制器确定赋予多个光通道的调制频率的多个频率。 时钟的每个频率都是相位锁定的，并且等于数据被调制的相应的预定频率。

    OPTICAL COMMUNICATION SYSTEM AND METHOD USING OPTICAL CHANNELS WITH PAIR-WISE ORTHOGONAL RELATIONSHIP
    8.
    发明申请
    OPTICAL COMMUNICATION SYSTEM AND METHOD USING OPTICAL CHANNELS WITH PAIR-WISE ORTHOGONAL RELATIONSHIP 审中-公开
    光通信系统和使用光信道与对等正交关系的方法

    公开(公告)号：US20070274728A1

    公开(公告)日：2007-11-29

    申请号：US11420607

    申请日：2006-05-26

    Applicant: Neal S. Bergano ,  Chien-Jen Chen ,  Carl R. Davidson

    Inventor： Neal S. Bergano ,  Chien-Jen Chen ,  Carl R. Davidson

    IPC: H04B10/00

    CPC classification number: H04B10/2563 ,  H04J14/02 ,  H04J14/06

    Abstract: An optical communication system and method may be configured to operate with optical signals having reduced channel spacing. The system may transmit optical signals on a plurality of optical channels with a pair-wise orthogonal relationship such that a first subset of channels has a first polarization state and a second subset of channels has a second polarization state. The channels may be spaced such that there is no overlap of modulation sidebands associated with channels in each of the polarization states. When receiving the optical signals, the orthogonal channels adjacent to a selected channel of interest may be nulled.

    Abstract translation: 光通信系统和方法可以被配置为利用具有减小的信道间隔的光信号进行操作。 系统可以以成对的正交关系在多个光信道上发送光信号，使得信道的第一子集具有第一极化状态，并且第二子信道具有第二极化状态。 信道可以间隔开，使得在每个偏振状态中与通道相关联的调制边带没有重叠。 当接收到光信号时，与所选择的感兴趣信道相邻的正交信道可能被置零。

    System and method for rapidly achieving optimum dispersion in optical transmission systems
    10.
    发明授权
    System and method for rapidly achieving optimum dispersion in optical transmission systems 有权
    快速实现光传输系统最佳色散的系统和方法

    公开(公告)号：US07130030B2

    公开(公告)日：2006-10-31

    申请号：US10677193

    申请日：2003-10-02

    Applicant: Carl R. Davidson ,  Robert R. Cordell ,  Yi Cai ,  Hongbin Zhang

    Inventor： Carl R. Davidson ,  Robert R. Cordell ,  Yi Cai ,  Hongbin Zhang

    IPC: G01N21/00

    CPC classification number: H04B10/25133 ,  H04B10/07951 ,  H04B10/2513 ,  H04B10/697 ,  H04J14/02

    Abstract: A system and method for optimizing dispersion in an optical transmission line is provided. The system and method comprise measuring the amplitude of a d.c. voltage component of a synchronously demodulated data signal of at least one wavelength channel by an in-phase carrier at the baud frequency of the wavelength channel. In an alternative embodiment, the system and method comprise measuring the IF amplitude of the resulting a.c. signal of a data signal of the at least one wavelength channel comprising a received RZ signal mixed with a local oscillator, whose frequency differs from the wavelength channel baud by a relatively small amount, somewhere on the order of about 100 kHz.

    Abstract translation: 提供了一种用于优化光传输线中的色散的系统和方法。 该系统和方法包括测量直流的振幅。 通过同相载波在波长信道的波特率下的至少一个波长信道的同步解调数据信号的电压分量。 在替代实施例中，系统和方法包括测量所产生的交流电的IF幅度。 所述至少一个波长信道的数据信号的信号包括与本地振荡器混合的接收到的RZ信号，所述本地振荡器的频率与波长信道波特相差相对较小的量，约为100kHz的数量级。

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