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1. 发明授权

US07362979B2 Apparatus and method for duobinary transmission 失效
标题翻译：二元传输装置及方法
公开(公告)号：US07362979B2
公开(公告)日：2008-04-22
申请号：US10355583
申请日：2003-01-31
申请人： Douglas M. Gill , David S. Levy , Xiang Liu , Moncef B. Tayahi , Xing Wei
发明人： Douglas M. Gill , David S. Levy , Xiang Liu , Moncef B. Tayahi , Xing Wei
IPC分类号： H04B10/12 , H04B10/04
CPC分类号： H04B10/508 , H04B10/505
摘要： An apparatus and method are provided for transmitting an optical duobinary signal using a low bandwidth modulator having a bandwidth of less than about 60% of the transmission bit rate of the transmitter. The modulator is adapted to provide low pass filtering for low pass filtered duobinary transmission in an optical fiber transmission system having residual dispersion.
摘要翻译：提供一种装置和方法，用于使用具有小于发射机的传输比特率的约60％的带宽的低带宽调制器来发送光学双二进制信号。调制器适于在具有残余色散的光纤传输系统中为低通滤波的双二进制传输提供低通滤波。

2. 发明授权

US07277647B2 System and method of optical transmission 有权
标题翻译：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。

3. 发明授权

US07277645B2 High-bit-rate long-haul fiber optic communication system techniques and arrangements 有权
标题翻译：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。

4. 发明授权

US07362980B2 Duobinary transmission system and method 失效
标题翻译：二元传输系统及方法
公开(公告)号：US07362980B2
公开(公告)日：2008-04-22
申请号：US10356203
申请日：2003-01-31
申请人： Douglas M. Gill , David S. Levy , Xiang Liu , Moncef B. Tayahi , Xing Wei
发明人： Douglas M. Gill , David S. Levy , Xiang Liu , Moncef B. Tayahi , Xing Wei
IPC分类号： H04B10/12 , H04B10/04
CPC分类号： H04B10/508 , H04B10/505
摘要： An optical duobinary transmission system and method are provided for transmitting optical duobinary signals across an optical transmission link having residual dispersion. The system includes a transmitter having a low bandwidth modulator, adapted to provide filtering for low pass filtered duobinary transmission. The transmission link is designed such that the residual dispersion of the transmission link substantially compensates for signal distortion from the transmitter.
摘要翻译：提供了一种用于在具有残余色散的光传输链路上传输光双二进制信号的光双二进制传输系统和方法。该系统包括具有低带宽调制器的发射机，适于对低通滤波的双二进制传输提供滤波。传输链路被设计成使得传输链路的残余色散基本上补偿来自发射机的信号失真。

5. 发明授权

US07317845B2 Optical modulator having reduced bandwidth requirements and method of operation thereof 失效
标题翻译：具有减少带宽要求的光调制器及其操作方法
公开(公告)号：US07317845B2
公开(公告)日：2008-01-08
申请号：US10875015
申请日：2004-06-23
申请人： Douglas M. Gill , Xiang Liu
发明人： Douglas M. Gill , Xiang Liu
IPC分类号： G02F1/035
CPC分类号： H04B10/505
摘要： An optical modulator is overdriven to increase its nonlinearity and therefore improve its response as it pertains to differential phase shift keyed (DPSK) transmission and a method of operating the same. In one embodiment, the MZM includes an MZM drive circuit coupled to the electrodes and configured to deliver to the electrode a DPSK drive signal bearing digital data and having a voltage that exceeds a normal drive voltage of the MZM by at least about 20%.
摘要翻译：光调制器被过载以增加其非线性并因此改善其响应，因为它涉及差分相移键控（DPSK）传输及其操作方法。在一个实施例中，MZM包括耦合到电极的MZM驱动电路并且被配置为向电极传送承载数字数据并具有超过MZM的正常驱动电压至少约20％的电压的DPSK驱动信号。

6. 发明申请

US20090136238A1 Security over an optical fiber link 审中-公开
标题翻译：通过光纤链路的安全
公开(公告)号：US20090136238A1
公开(公告)日：2009-05-28
申请号：US12286024
申请日：2008-09-26
申请人： Douglas M. Gill , Xiang Liu
发明人： Douglas M. Gill , Xiang Liu
IPC分类号： H04B10/12 , H04B10/04 , H04B10/00
CPC分类号： H04B10/85
摘要： An apparatus includes an optical transmitter having a first dynamically reconfigurable optical filter, an optical receiver having a second dynamically reconfigurable optical filter. The optical transmitter and optical receive are connected via an optical fiber transmission line. The optical filters are configured to function in a complementary manner.
摘要翻译：一种装置包括具有第一动态可重构光滤波器的光发射机，具有第二动态可重配置光滤波器的光接收机。光发射机和光接收机经由光纤传输线连接。光学滤波器被配置为以互补的方式起作用。

7. 发明授权

US07409163B2 Method and apparatus for optical signal transmission 有权
标题翻译：光信号传输方法及装置
公开(公告)号：US07409163B2
公开(公告)日：2008-08-05
申请号：US10881236
申请日：2004-06-30
申请人： Douglas M Gill , Xiang Liu
发明人： Douglas M Gill , Xiang Liu
IPC分类号： H04B10/00 , H04B10/12 , H04B10/04
CPC分类号： H04B10/5055 , H04B10/25137 , H04B10/2543 , H04B10/2572 , H04B10/505 , H04B10/50575 , H04B10/5167
摘要： A method and apparatus for transmission of optical signals across an optical transmission link wherein duobinary signals or inverse-data signals are transmitted when the chromatic dispersion of the transmission link is above or below a dispersion threshold, respectively, to significantly improve optical signal transmission performance.
摘要翻译：一种用于在光传输链路之间传输光信号的方法和装置，其中当传输链路的色散分别高于或低于色散阈值时，传输双二进制信号或反数据信号，以显着提高光信号传输性能。

8. 发明授权

US07133191B2 Optical equalization 有权
公开(公告)号：US07133191B2
公开(公告)日：2006-11-07
申请号：US11025436
申请日：2004-12-29
申请人： Douglas M. Gill , Xiang Liu
发明人： Douglas M. Gill , Xiang Liu
IPC分类号： G02F1/365 , G02B6/26
CPC分类号： H04B10/2507
摘要： A device and method for processing a signal e.g. equalizing a signal, is disclosed. Such processing involves dividing a signal into two portions that each traverses a wavepath and then are combined. The respective wavepaths impose a non-linear frequency-versus-phase dependency on a signal portion. The frequency-versus-phase dependencies that characterize the respective wavepaths are similar in shape but inverted from each other. A processed signal has significantly improved signal-to-noise ratio.

9. 发明授权

US08045862B2 Optical communication method and apparatus 有权
标题翻译：光通信方法及装置
公开(公告)号：US08045862B2
公开(公告)日：2011-10-25
申请号：US10790434
申请日：2004-02-27
申请人： Xiang Liu , Yikai Su , Xing Wei
发明人： Xiang Liu , Yikai Su , Xing Wei
IPC分类号： H04B10/02
CPC分类号： H04B10/291 , H04B10/2914 , H04B2210/258
摘要： An optical amplification method and apparatus implemented using RZ-DPSK modulation or variants thereof and a deeply saturated semiconductor optical amplifier.
摘要翻译：使用RZ-DPSK调制或其变体和深饱和半导体光放大器实现的光放大方法和装置。

10. 发明申请

US20080075472A1 Reconstruction and restoration of an optical signal field 有权
标题翻译：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。

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