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255 条记录 (耗时 0.037 秒)

    Dispersion compensation method and apparatus
    1.
    发明授权
    Dispersion compensation method and apparatus 失效
    色散补偿方法和装置

    公开(公告)号：US07369778B2

    公开(公告)日：2008-05-06

    申请号：US10331299

    申请日：2002-12-30

    申请人： Xiang Liu ,  Linn Frederick Mollenauer ,  Xing Wei

    发明人： Xiang Liu ,  Linn Frederick Mollenauer ,  Xing Wei

    IPC分类号： H04B10/12 ,  H04B10/00

    CPC分类号： H04B10/25253 ,  H04J14/02

    摘要： In one embodiment of the invention a dispersion compensator is provided for use in a dense wavelength division multiplexed optical communication system. The dispersion compensator comprises a periodic-group-delay dispersion compensation module which provides a portion of the dispersion compensation for a dispersion managed span of the optical communication system. A remaining portion of the dispersion compensation for the dispersion managed span is provided by dispersion compensating fiber. The portions of the dispersion compensation provided by each of the periodic-group-delay dispersion compensation module and the dispersion compensating fiber is selected such that the collision-induced timing jitter is reduced.

    摘要翻译： 在本发明的一个实施例中，提供了一种用于密集波分复用光通信系统中的色散补偿器。 色散补偿器包括周期性组延迟色散补偿模块，其为光通信系统的色散管理跨度提供色散补偿的一部分。 色散管理跨度的色散补偿的剩余部分由色散补偿光纤提供。 由周期群延迟色散补偿模块和色散补偿光纤中的每一个提供的色散补偿的部分被选择为使得碰撞引起的定时抖动减小。

    System and method of optical transmission
    3.
    发明授权
    System and method of optical transmission 有权
    光传输系统和方法

    公开(公告)号：US07277647B2

    公开(公告)日：2007-10-02

    申请号：US10099105

    申请日：2002-03-14

    申请人： Douglas M Gill ,  Xiang Liu ,  Xing Wei

    发明人： Douglas M Gill ,  Xiang Liu ,  Xing Wei

    IPC分类号： H04B10/04

    CPC分类号： H04B10/505 ,  H04B10/5053 ,  H04B10/5563

    摘要： Minimum shift keying (MSK) is used as the coding scheme in a high bit rate optical transmission system, and the signal format is either RZ (return-to-zero) or NRZ (non-return-to-zero). The system can combine multiple individual channels with different wavelengths in a WDM or dense wavelength division multiplexed (DWDM) arrangement. Dispersion management can be provided using several techniques, such as quasi-linear transmissions or conventional RZ transmissions. At the transmitter, an optical MSK transmitter is used to modulate the phase of a stream of high bit rate (e.g., 40 Gbit/s) optical signals. Many such data streams can be combined in a wavelength division multiplexer and transmitted to a remote receiver, where the signal is wavelength division demultiplexed. The encoded data in each wavelength channel is then recovered by an MSK receiver, which may consist of a delay demodulator and a balanced detector.

    摘要翻译： 最小移位键控（MSK）用作高比特率光传输系统中的编码方案，信号格式为RZ（归零）或NRZ（非归零）。 该系统可以在WDM或密集波分复用（DWDM）布置中组合具有不同波长的多个单独信道。 可以使用几种技术来提供色散管理，例如准线性传输或常规RZ传输。 在发射机处，使用光学MSK发射机来调制高比特率（例如40Gbit / s）光信号流的相位。 许多这样的数据流可以组合在波分多路复用器中并被发送到远程接收机，其中信号被波分解复用。 每个波长信道中的编码数据然后由MSK接收机恢复，MSK接收机可以由延迟解调器和平衡检测器组成。

    High-bit-rate long-haul fiber optic communication system techniques and arrangements
    4.
    发明授权
    High-bit-rate long-haul fiber optic communication system techniques and arrangements 有权
    高比特率长距离光纤通信系统的技术和布置

    公开(公告)号：US07277645B2

    公开(公告)日：2007-10-02

    申请号：US10099077

    申请日：2002-03-14

    申请人： Douglas M Gill ,  Xiang Liu ,  Xing Wei

    发明人： Douglas M Gill ,  Xiang Liu ,  Xing Wei

    IPC分类号： H04B10/04

    CPC分类号： H04B10/2563 ,  G02B2006/12142 ,  G02B2006/12159 ,  G02F1/225

    摘要： A 90 degree Alternate-Phase (AP) on-off keying (OOK) transmission format for high bit rate, long-haul optical transmission systems employing a chirped or a chirp-free pulse stream generated by a pulse generator (e.g., Mach Zehnder modulator) driven by mixing two electrical signals—one for intensity modulation and another for pulse modulation. These electrical signals may be two properly skewed sinusoidal electrical signals at half the desired data rate thereby generating a pulse stream in which the maximum optical phase modulation occurs at the intensity peak of each pulse and is 90 degrees out of phase with its nearest neighbors.

    摘要翻译： 采用由脉冲发生器产生的啁啾或无啁啾脉冲流的高比特率，长途光传输系统的90度交替相位（AP）开关键控（OOK）传输格式（例如，Mach Zehnder调制器 ）通过混合两个电信号驱动，一个用于强度调制，另一个用于脉冲调制。 这些电信号可以是两倍于所需数据速率的两个正确偏斜的正弦电信号，从而产生脉冲流，其中最大光相位调制发生在每个脉冲的强度峰值处，并且与其最近的相邻部分相差90度。

    Reconstruction and restoration of an optical signal field
    7.
    发明申请
    Reconstruction and restoration of an optical signal field 有权
    光信号场的重建和恢复

    公开(公告)号：US20080075472A1

    公开(公告)日：2008-03-27

    申请号：US11525786

    申请日：2006-09-22

    申请人： Xiang Liu ,  Xing Wei

    发明人： Xiang Liu ,  Xing Wei

    IPC分类号： H04B10/06

    CPC分类号： H04B10/60 ,  H04B10/5161 ,  H04B10/677

    摘要： A digital version of both amplitude and phase of a received optical is developed by employing direct differential detection in conjunction with digital signal processing. The signal is split into three copies. An intensity profile is conventionally obtained using one of the copies. Phase information is obtained by supplying each remaining copy to a respective one of a pair of optical delay interferometers that have orthogonal phase offsets, followed by respective balanced intensity detectors. The output of each of the balanced intensity detectors, and the intensity profile, are each converted to respective digital representations. Signal processing is used to develop the phase information from the digital representations of the output of the balanced intensity detector outputs.

    摘要翻译： 通过采用与数字信号处理相结合的直接差分检测来开发接收光学的幅度和相位的数字版本。 信号分为三份。 通常使用其中一个副本来获得强度分布。 通过将每个剩余副本提供给具有正交相位偏移的一对光学延迟干涉仪中的相应一个，随后是相应的平衡强度检测器来获得相位信息。 每个平衡强度检测器的输出和强度分布都被转换成各自的数字表示。 信号处理用于从平衡强度检测器输出的输出的数字表示中开发相位信息。

    Methods and apparatus for optical pulse generator with progressive phase shift
    8.
    发明授权
    Methods and apparatus for optical pulse generator with progressive phase shift 有权
    具有逐行相移的光脉冲发生器的方法和装置

    公开(公告)号：US07027669B2

    公开(公告)日：2006-04-11

    申请号：US10641414

    申请日：2003-08-15

    申请人： Juerg Leuthold ,  Xiang Liu ,  Xing Wei

    发明人： Juerg Leuthold ,  Xiang Liu ,  Xing Wei

    IPC分类号： G02F1/035

    CPC分类号： H04B10/505 ,  G02F1/225 ,  G02F2201/126 ,  G02F2203/25 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/508

    摘要： Systems and techniques for generating optical pulses exhibiting a progressive phase shift, and the use of those pulses to transmit data, are described. One embodiment of the invention employs a Mach-Zehnder modulator using electrical signals chosen to introduce a predetermined frequency shift at the center of each pulse generated by the pulse generator. This frequency shift is achieved by introducing a timing difference between the electrical input signals. Another embodiment of the invention employs a chirp free pulse generator and a separate phase modulator to induce the desired frequency or phase shift. These progressively phase shifted pulses may be further modulated to transmit data by introducing phase or amplitude modulation on the optical pulses, depending on the data to be transmitted.

    摘要翻译： 描述了产生逐行相移的光脉冲的系统和技术，以及这些脉冲用于发送数据的用途。 本发明的一个实施例采用马赫曾德尔调制器，其使用所选择的电信号，以在由脉冲发生器产生的每个脉冲的中心处引入预定的频移。 通过引入电输入信号之间的定时差来实现该频移。 本发明的另一个实施例采用啁啾自由脉冲发生器和单独的相位调制器来诱导期望的频率或相移。 这些逐渐的相移脉冲可以被进一步调制以通过根据要发送的数据在光脉冲上引入相位或幅度调制来发送数据。

    System and method for optically labeled packet transmission
    9.
    发明申请
    System and method for optically labeled packet transmission 失效
    用于光标签包传输的系统和方法

    公开(公告)号：US20050069329A1

    公开(公告)日：2005-03-31

    申请号：US10673701

    申请日：2003-09-29

    申请人： Randy Giles ,  Xiang Liu ,  Yikai Su ,  Xing Wei

    发明人： Randy Giles ,  Xiang Liu ,  Yikai Su ,  Xing Wei

    IPC分类号： H04L27/36 ,  H04B10/02 ,  H04B10/04 ,  H04B10/06 ,  H04B10/142 ,  H04B10/152 ,  H04B10/155 ,  H04J14/08

    CPC分类号： H04B10/505 ,  H04B10/5051

    摘要： A system and method for transmitting optically labeled packets using DPSK/ASK modulation. The system comprises a transmitter including at least two modulators adapted to provide DPSK modulation of a payload portion of optically labeled packets and ASK modulation for a label portion of the optically labeled packets. A receiver is also provided which includes a balanced detector for detection of the payload portion of the optically labeled packets.

    摘要翻译： 一种使用DPSK / ASK调制发送光标签分组的系统和方法。 该系统包括发射机，包括至少两个调制器，其适于提供光学标记的分组的有效载荷部分的DPSK调制和用于光学标记的分组的标签部分的ASK调制。 还提供了一种接收机，其包括用于检测光学标记的分组的有效载荷部分的平衡检测器。