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1. 发明授权

US07433604B1 Direct-detection optical differential 8-level phase shift keying (OD8PSK) for spectrally efficient transmission 有权
标题翻译：直接检测光差分8级相移键控（OD8PSK），用于频谱高效传输
公开(公告)号：US07433604B1
公开(公告)日：2008-10-07
申请号：US11168154
申请日：2005-06-28
申请人： Cheolhwan Kim , Yan Han , Guifang Li
发明人： Cheolhwan Kim , Yan Han , Guifang Li
IPC分类号： H04B10/04
CPC分类号： H04B10/5051 , H04B10/5053 , H04B10/5055 , H04B10/5561 , H04B10/677
摘要： Efficient systems, devices, apparatus and methods to generate, transmit and detect differentially encoded 8-level phase-modulated optical signals for spectrally efficient optical communication systems is invented. It includes an electrical encoder and an optical encoder for generation of differentially encoded 8-level phase-modulated optical signals and optical demodulators and balanced detectors for detection of the optical signals. The optical signals are transmitted through optical fiber links or air. The electrical encoder maps three independent data channels into three differentially-encoded data sequences. In the optical encoder, the encoded data sequences from the electrical encoder drive optical modulators to generate differentially-encoded 8-level phase modulated optical signals at a symbol rate equal to the bit rate of each input data channel. After transmission through optical fiber, the optical signals are demodulated optically and the original data are recovered by the balanced detectors with direct detection.
摘要翻译：发明了用于频谱有效的光通信系统的用于生成，传输和检测差分编码的8级相位调制光信号的有效系统，装置，装置和方法。它包括电编码器和用于产生差分编码的8电平相位调制光信号的光编码器和用于检测光信号的光解调器和平衡检波器。光信号通过光纤链路或空气传输。电编码器将三个独立的数据通道映射成三个差分编码的数据序列。在光学编码器中，来自电编码器的编码数据序列驱动光调制器，以等于每个输入数据信道的比特率的符号速率产生差分编码的8电平相位调制光信号。在通过光纤传输之后，光信号被光学解调，原始数据由直接检测的平衡检测器恢复。

2. 发明授权

US07369779B1 Regeneration of optical phase modulated signals 有权
标题翻译：光相位调制信号的再生
公开(公告)号：US07369779B1
公开(公告)日：2008-05-06
申请号：US11181399
申请日：2005-07-14
申请人： Kevin A. Croussore , Guifang Li , Cheolhwan Kim
发明人： Kevin A. Croussore , Guifang Li , Cheolhwan Kim
IPC分类号： H04B10/02
CPC分类号： H04B10/299 , H01S3/06754 , H01S3/10007
摘要： A regenerator for restoring the originally encoded optical phase of a differential-phase-shift-keyed signal. In an embodiment, the regenerator simultaneously provides limiting amplification and reduces amplitude noise based on a phase-sensitive optical amplifier that combines a weak signal field of a degraded input data with a strong pump field supplied by a local oscillator in a nonlinear interferometer. The two fields interact through degenerate four-wave mixing, and optical energy is transferred from the pump to the signal and vice versa. The phase sensitive nature of the optical gain leads to amplification of a specific phase component of the signal, determined by the input pump-signal phase difference and the incident signal phase is restored to two distinct states, separated by 180° according to the original encoding. Simultaneously, gain saturation of the pump wave by the signal wave results in limiting amplification of the signal wave for removing signal amplitude noise.
摘要翻译：一种用于恢复差分相移键控信号的原始编码光相位的再生器。在一个实施例中，再生器同时提供限制放大，并且基于将劣化输入数据的弱信号场与由非线性干涉仪中的本地振荡器提供的强泵浦场组合的相敏光放大器同时提供限幅放大并降低振幅噪声。两个场通过简并四波混频相互作用，光能从泵传输到信号，反之亦然。光增益的相敏特性导致由输入泵浦信号相位差确定的信号的特定相位分量的放大，并且入射信号相位被恢复到两个不同状态，根据原始编码分开180° 。同时，通过信号波的泵浦波的增益饱和导致信号波的放大，以消除信号幅度噪声。

3. 发明授权

US07643760B1 Direct detection differential polarization-phase-shift keying for high spectral efficiency optical communication 有权
标题翻译：用于高光谱效率光通信的直接检测差分极化相移键控
公开(公告)号：US07643760B1
公开(公告)日：2010-01-05
申请号：US11367828
申请日：2006-03-03
申请人： Yan Han , Guifang Li
发明人： Yan Han , Guifang Li
IPC分类号： H04B10/04
CPC分类号： H04B10/5561 , H04B10/505 , H04B10/5161 , H04B10/532 , H04B10/677
摘要： Efficient apparatus, methods, systems and devices to generate, transmit and detect optical differential polarization-phase-shift keying signals are disclosed for high spectral efficiency optical communication systems. It includes an electrical encoder and an optical encoder for generation of differentially encoded polarization-phase modulated optical signals and optical demodulators and balanced detectors for detection of the optical signals. The optical signals are transmitted through optical fiber links or free space. The electrical encoder maps independent data channels into differentially-encoded data sequences. In the optical encoder, the encoded data sequences from the electrical encoder drive optical modulators to generate differentially-encoded polarization-phase modulated optical signals at a symbol rate equal to the bit rate of each input data channel. After transmission through a transmission medium, the optical signals are demodulated optically and the original data are recovered by multilevel detection, without recovering the polarization state of received signals.
摘要翻译：公开了用于高光谱效率光通信系统的用于生成，发射和检测光学差分偏振相移键控信号的有效装置，方法，系统和装置。它包括电编码器和用于产生差分编码的偏振相位调制光信号的光编码器和用于检测光信号的光解调器和平衡检波器。光信号通过光纤链路或自由空间传输。电编码器将独立数据信道映射到差分编码数据序列中。在光学编码器中，来自电编码器的编码数据序列驱动光调制器，以等于每个输入数据信道的位速率的符号速率产生差分编码的偏振相位调制光信号。在通过传输介质传输之后，光信号被光学解调，原始数据通过多级检测恢复，而不恢复接收信号的偏振状态。

4. 发明授权

US08213795B2 Systems and methods of polarization time coding for optical communications 有权
标题翻译：用于光通信的偏振时间编码系统和方法
公开(公告)号：US08213795B2
公开(公告)日：2012-07-03
申请号：US12118642
申请日：2008-05-09
申请人： Yan Han , Guifang Li
发明人： Yan Han , Guifang Li
IPC分类号： H04B10/00
CPC分类号： H04B10/50 , H04B10/2507 , H04B10/5161 , H04B10/532
摘要： Systems and methods of polarization-time coding are disclosed. One method includes encoding information in orthogonal polarizations of light and correlated information in multiple time slots, and transmitting the information using the orthogonal polarizations in the time slots. Another method includes receiving a first input pair which specifies a first polarization state and a second input pair containing which specifies a second polarization state; transforming each input pair according to a matrix specifying a conjugate operation to produce four output pairs. The method further includes transmitting at a first time the first output pair using the first polarization state and the third output pair using the second polarization state. The method further includes transmitting at a second time the second output pair using the first polarization state and the fourth output pair using the second polarization state.
摘要翻译：公开了偏振时间编码的系统和方法。一种方法包括在多个时隙中的光和相关信息的正交偏振中编码信息，以及在时隙中使用正交偏振来发送信息。另一方法包括接收指定第一偏振状态的第一输入对和包含指定第二偏振状态的第二输入对; 根据指定共轭运算的矩阵来变换每个输入对以产生四个输出对。该方法还包括使用第二偏振态使用第一偏振状态和第三输出对在第一时间发送第一输出对。该方法还包括使用第二偏振态使用第一偏振状态和第四输出对在第二时间发送第二输出对。

5. 发明授权

US07983570B2 Direct detection differential polarization-phase-shift keying for high spectral efficiency optical communication 有权
标题翻译：用于高光谱效率光通信的直接检测差分极化相移键控
公开(公告)号：US07983570B2
公开(公告)日：2011-07-19
申请号：US12618370
申请日：2009-11-13
申请人： Yan Han , Guifang Li
发明人： Yan Han , Guifang Li
IPC分类号： H04B10/04
CPC分类号： H04B10/5561 , H04B10/505 , H04B10/5161 , H04B10/532 , H04B10/677
摘要： Efficient apparatus, methods, systems and devices to generate, transmit and detect optical differential polarization-phase-shift keying signals are disclosed for high spectral efficiency optical communication systems. It includes an electrical encoder and an optical encoder for generation of differentially encoded polarization-phase modulated optical signals and optical demodulators and balanced detectors for detection of the optical signals. The optical signals are transmitted through optical fiber links or free space. The electrical encoder maps independent data channels into differentially-encoded data sequences. In the optical encoder, the encoded data sequences from the electrical encoder drive optical modulators to generate differentially-encoded polarization-phase modulated optical signals at a symbol rate equal to the bit rate of each input data channel. After transmission through a transmission medium, the optical signals are demodulated optically and the original data are recovered by multilevel detection, without recovering the polarization state of received signals.
摘要翻译：公开了用于高光谱效率光通信系统的用于生成，发射和检测光学差分偏振相移键控信号的有效装置，方法，系统和装置。它包括电编码器和用于产生差分编码的偏振相位调制光信号的光编码器和用于检测光信号的光解调器和平衡检波器。光信号通过光纤链路或自由空间传输。电编码器将独立数据信道映射到差分编码数据序列中。在光学编码器中，来自电编码器的编码数据序列驱动光调制器，以等于每个输入数据信道的位速率的符号速率产生差分编码的偏振相位调制光信号。在通过传输介质传输之后，光信号被光学解调，原始数据通过多级检测恢复，而不恢复接收信号的偏振状态。

6. 发明申请

US20100142970A1 Direct Detection Differential Polarization-Phase-Shift Keying for High Spectral Efficiency Optical Communication 有权
标题翻译：直接检测差分极化相移键控高光谱效率光通信
公开(公告)号：US20100142970A1
公开(公告)日：2010-06-10
申请号：US12618370
申请日：2009-11-13
申请人： Yan Han , Guifang Li
发明人： Yan Han , Guifang Li
IPC分类号： H04B10/00
CPC分类号： H04B10/5561 , H04B10/505 , H04B10/5161 , H04B10/532 , H04B10/677
摘要： Efficient apparatus, methods, systems and devices to generate, transmit and detect optical differential polarization-phase-shift keying signals are disclosed for high spectral efficiency optical communication systems. It includes an electrical encoder and an optical encoder for generation of differentially encoded polarization-phase modulated optical signals and optical demodulators and balanced detectors for detection of the optical signals. The optical signals are transmitted through optical fiber links or free space. The electrical encoder maps independent data channels into differentially-encoded data sequences. In the optical encoder, the encoded data sequences from the electrical encoder drive optical modulators to generate differentially-encoded polarization-phase modulated optical signals at a symbol rate equal to the bit rate of each input data channel. After transmission through a transmission medium, the optical signals are demodulated optically and the original data are recovered by multilevel detection, without recovering the polarization state of received signals.
摘要翻译：公开了用于高光谱效率光通信系统的用于生成，发射和检测光学差分偏振相移键控信号的有效装置，方法，系统和装置。它包括电编码器和用于产生差分编码的偏振相位调制光信号的光编码器和用于检测光信号的光解调器和平衡检波器。光信号通过光纤链路或自由空间传输。电编码器将独立数据信道映射到差分编码数据序列中。在光学编码器中，来自电编码器的编码数据序列驱动光调制器，以等于每个输入数据信道的位速率的符号速率产生差分编码的偏振相位调制光信号。在通过传输介质传输之后，光信号被光学解调，并且原始数据通过多级检测恢复，而不恢复接收信号的偏振状态。

7. 发明申请

US20080279564A1 Systems and Methods of Polarization Time Coding for Optical Communications 有权
标题翻译：光通信极化时间编码系统与方法
公开(公告)号：US20080279564A1
公开(公告)日：2008-11-13
申请号：US12118642
申请日：2008-05-09
申请人： Yan Han , Guifang Li
发明人： Yan Han , Guifang Li
IPC分类号： H04B10/00
CPC分类号： H04B10/50 , H04B10/2507 , H04B10/5161 , H04B10/532
摘要： Systems and methods of polarization-time coding are disclosed. One method includes encoding information in orthogonal polarizations of light and correlated information in multiple time slots, and transmitting the information using the orthogonal polarizations in the time slots. Another method includes receiving a first input pair which specifies a first polarization state and a second input pair containing which specifies a second polarization state; transforming each input pair according to a matrix specifying a conjugate operation to produce four output pairs. The method further includes transmitting at a first time the first output pair using the first polarization state and the third output pair using the second polarization state. The method further includes transmitting at a second time the second output pair using the first polarization state and the fourth output pair using the second polarization state.
摘要翻译：公开了偏振时间编码的系统和方法。一种方法包括在多个时隙中的光和相关信息的正交偏振中编码信息，以及在时隙中使用正交偏振来发送信息。另一方法包括接收指定第一偏振状态的第一输入对和包含指定第二偏振状态的第二输入对; 根据指定共轭运算的矩阵来变换每个输入对以产生四个输出对。该方法还包括使用第二偏振态使用第一偏振状态和第三输出对在第一时间发送第一输出对。该方法还包括使用第二偏振态使用第一偏振状态和第四输出对在第二时间发送第二输出对。

8. 发明授权

US09103961B2 Systems and methods for optical transmission using supermodes 有权
标题翻译：使用超模光学传输的系统和方法
公开(公告)号：US09103961B2
公开(公告)日：2015-08-11
申请号：US13584129
申请日：2012-08-13
申请人： Guifang Li , Xia Cen , Neng Bai
发明人： Guifang Li , Xia Cen , Neng Bai
IPC分类号： G02B6/036 , G02B6/02
CPC分类号： G02B6/02042
摘要： In some embodiments, coupled multi-core fiber is used for optical transmission. The coupled multi-core fiber includes multiple cores each supporting a spatial mode. The cores are positioned close enough to cause coupling between their modes that generates supermodes, that are used to transmit data.
摘要翻译：在一些实施例中，耦合的多芯光纤用于光传输。耦合的多芯光纤包括多个核，每个核支持空间模式。核心位置足够接近，以产生用于传输数据的生成超文本的模式之间的耦合。

9. 发明申请

US20140248052A1 MODE-ROUTED OPTICAL NETWORKS 审中-公开
标题翻译：模式布线的光网络
公开(公告)号：US20140248052A1
公开(公告)日：2014-09-04
申请号：US13789410
申请日：2013-03-07
申请人： Guifang Li , Mustafa Bassiouni
发明人： Guifang Li , Mustafa Bassiouni
IPC分类号： H04J14/04
CPC分类号： H04J14/04 , H04B10/2581 , H04Q11/0005 , H04Q2011/0011 , H04Q2011/0024
摘要： In one embodiment, an optical network includes multiple cross-connects configured to switch spatial modes in which signals are propagated across the network and multiple fiber links that extend between pairs of cross-connects, the fiber links including multimode optical fibers that support multiple spatial modes.
摘要翻译：在一个实施例中，光网络包括多个交叉连接，其被配置为切换信号在网络上传播的空间模式，以及在交叉连接对之间延伸的多个光纤链路，光纤链路包括支持多个空间模式的多模光纤。

10. 发明申请

US20130230311A1 Systems and methods for compensating for interference in multimode optical fiber 审中-公开
标题翻译：用于补偿多模光纤中的干扰的系统和方法
公开(公告)号：US20130230311A1
公开(公告)日：2013-09-05
申请号：US13573700
申请日：2012-10-03
申请人： Neng Bai , Guifang Li
发明人： Neng Bai , Guifang Li
IPC分类号： H04B10/2507
CPC分类号： H04B10/2507 , H04B10/2581
摘要： In one embodiment, compensating for interference in optical fiber relates to receiving a signal transmitted over the optical fiber, multiplying the signal by a frequency domain equalization (FDE) filter that compensates for the interference to obtain a filtered signal, computing an error in the filtered signal, estimating a gradient based upon the computed error, and updating the FDE filter using the estimated gradient.
摘要翻译：在一个实施例中，补偿光纤中的干扰涉及接收通过光纤传输的信号，将信号乘以频域均衡（FDE）滤波器，其补偿干扰以获得滤波信号，计算滤波后的误差信号，基于所计算的误差估计梯度，以及使用估计的梯度来更新FDE滤波器。

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