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1. 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。

2. 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。

3. 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。

4. 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。

5. 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。

6. 发明授权

US08503881B1 Systems for extending WDM transmission into the O-band 有权
标题翻译：将WDM传输扩展到O波段的系统
公开(公告)号：US08503881B1
公开(公告)日：2013-08-06
申请号：US12062030
申请日：2008-04-03
申请人： Guifang Li
发明人： Guifang Li
IPC分类号： H04J14/02
CPC分类号： H04J14/02 , H04B10/2525 , H04B10/506 , H04J14/0279 , H04J14/06
摘要： Method, apparatus and systems for a wavelength division multiplexing system operating at O-Band. The system includes a transmitter for wavelength division multiplexing digital O-band optical channels into a multiplexed optical signal, amplifying and transmitting the multiplexed optical signal, a fiber transmission span using constant intensity modulation and semiconductor optical amplification, and a receiver for receiving and amplifying the transmitted multiplexed optical signal and restoring the individual digital O-band optical signals. In an embodiment, the transmission span is a single mode fiber transmission span and in another embodiment includes an optical amplifier module coupled into the fiber transmission span. In another embodiment, the transmission span includes a length of O-band dispersion compensating fiber to reduce four-wave mixing. In another embodiment the system uses wavelength division multiplexing in combination with polarization interleaving. In another embodiment, the wavelength division multiplexing system operates at both O-Band and C-Band.
摘要翻译：用于在O波段操作的波分复用系统的方法，装置和系统。该系统包括用于将数字O波段光信道波分复用为复用光信号，放大和发送复用光信号的发射机，使用恒定强度调制和半导体光放大的光纤传输跨度，以及用于接收和放大传输复用光信号和恢复各个数字O波段光信号。在一个实施例中，传输跨度是单模光纤传输跨度，并且在另一实施例中包括耦合到光纤传输范围内的光放大器模块。在另一个实施例中，传输跨度包括一段O波段色散补偿光纤以减少四波混频。在另一个实施例中，该系统结合使用波分复用与极化交织。在另一个实施例中，波分复用系统在O波段和C波段两者下工作。

7. 发明申请

US20120177386A1 ELECTRONIC PHASE CONJUGATION FOR IMPAIRMENT COMPENSATION IN A FIBER COMMUNICATION SYSTEM 有权
标题翻译：用于纤维通信系统中的补偿补偿的电子相位联合
公开(公告)号：US20120177386A1
公开(公告)日：2012-07-12
申请号：US12987595
申请日：2011-01-10
申请人： Xiang Zhou , Guifang Li , Eduardo F. Mateo
发明人： Xiang Zhou , Guifang Li , Eduardo F. Mateo
IPC分类号： H04B10/06
CPC分类号： H04B10/2513 , H04B10/2537 , H04B10/2543 , H04B10/2569 , H04B10/2572
摘要： Exemplary embodiments include a method and systems for impairment compensation in a communication system. The systems can include an electronic phase conjugation system that receives an incoming optical signal from a first section of a fiber optic link, converts the incoming optical signal to an in-phase electric signal and a quadrature electrical signal, and generates a phase conjugated outgoing optical signal from the in-phase and quadrature electrical signals. The phase conjugated outgoing optical signal compensates for impairment of the fiber in the communication system.
摘要翻译：示例性实施例包括用于通信系统中的损伤补偿的方法和系统。该系统可以包括电子相位共轭系统，其接收来自光纤链路的第一部分的输入光信号，将输入光信号转换为同相电信号和正交电信号，并产生相位共轭输出光来自同相和正交电信号的信号。相位共轭输出光信号补偿通信系统中光纤的损伤。

8. 发明授权

US07856184B2 Systems and methods for adaptive interference cancellation 有权
标题翻译：自适应干扰消除的系统和方法
公开(公告)号：US07856184B2
公开(公告)日：2010-12-21
申请号：US11846232
申请日：2007-08-28
申请人： Guifang Li
发明人： Guifang Li
IPC分类号： H04B10/00 , H04B10/04
CPC分类号： H04B10/25758
摘要： In one embodiment a communications system includes an RF receiver that receives a desired signal and the interference signal, a first phase modulator that receives the desired signal and the interference signal from the RF receiver and generates a resulting optical signal, a second phase modulator that generates a modulated optical signal relative to an inverse interference signal and transmits the modulated optical signal to the first phase modulator, and a detector that receives the resulting optical signal from the first phase modulator and detects the desired signal, wherein the resulting optical signal comprises a modulated optical signal generated by the first phase modulator relative to the desired signal and the interference signal received from the RF receiver and relative to the modulated optical signal received from the second phase modulator.
摘要翻译：在一个实施例中，通信系统包括接收期望信号和干扰信号的RF接收机，接收所需信号的第一相位调制器和来自RF接收机的干扰信号并产生所得到的光信号，第二相位调制器产生相对于反相干扰信号的调制光信号，并将经调制的光信号发射到第一相位调制器;以及检测器，其接收来自第一相位调制器的结果光信号并检测所需信号，其中所得到的光信号包括调制的由第一相位调制器相对于期望信号产生的光信号和从RF接收机接收的干扰信号和相对于从第二相位调制器接收的调制光信号。

9. 发明授权

US07224863B1 All optical regeneration 有权
标题翻译：所有光学再生
公开(公告)号：US07224863B1
公开(公告)日：2007-05-29
申请号：US10661184
申请日：2003-09-12
申请人： Yuhua Li , Guifang Li
发明人： Yuhua Li , Guifang Li
IPC分类号： G02B6/26
CPC分类号： H04B10/299 , G02B6/02028
摘要： All optical regeneration methods and systems can be realized through an exponential amplifier and a limiting amplifier, which could be two independent devices (one piece of fiber with parametric amplification and a semiconductor optical amplifier operating at saturation state) or one single device (one piece of fiber). The signal quality and the extinction ratio after regeneration are significantly improved compared with the degraded incoming data using a parametric amplifier with the data signal to be regenerated as the pump. The regenerated data has an extinction ratio as high as 14 dB, an extinction ratio enhancement of approximately 5 dB and an approximately 5 dB negative power penalty. This regeneration schemes are format transparent (RZ and NRZ), and provide noise reduction both for bit 1's and bit 0's of the data sequence. The regeneration method and apparatus that just utilizes fibers has the additional capability of ultrafast response speed (several femtoseconds due to the Kerr effect).
摘要翻译：所有光学再生方法和系统都可以通过指数放大器和限幅放大器来实现，该放大器可以是两个独立的器件（一个具有参数放大的光纤和在饱和状态下工作的半导体光放大器）或一个单一器件纤维）。再生后的信号质量和消光比与使用参数放大器的劣化输入数据相比显着提高，数据信号作为泵再生。再生数据具有高达14dB的消光比，大约5dB的消光比增强和大约5dB的负功率损耗。这种再生方案是格式透明的（RZ和NRZ），并且为数据序列的位1和位0提供降噪。刚刚利用光纤的再生方法和装置具有超快速响应速度（由于克尔效应而产生的几个飞秒）的附加能力。

10. 发明授权

US5619103A Inductively coupled plasma generating devices 失效
标题翻译：电感耦合等离子体发生装置
公开(公告)号：US5619103A
公开(公告)日：1997-04-08
申请号：US486917
申请日：1995-06-07
申请人： Jeffrey A. Tobin , Guifang Li
发明人： Jeffrey A. Tobin , Guifang Li
IPC分类号： H01J37/32 , H01J65/04 , H01J7/24
CPC分类号： H01J37/321 , H01J65/048
摘要： A broad area plasma lighting device in which a sealed gas envelope placed adjacent to a planar inductive coupling structure generates visible light. Representative planar inductive coupling structures include a planar spiral coil and a parallel conductor coupling structure. According to the invention, a parallel conductor coupling structure has two basic forms: separate parallel conductors each driven by its own generator/tuning circuit, or single conductor such as a flattened helix or series of square coils driven by one generator/tuning circuit. In addition, a plasma generating device having one or more parallel conductor inductive coupling structures is described. The resulting plasma generator can be used in such applications as plasma processing and inductive plasma lighting.
摘要翻译：一种广泛的等离子体照明装置，其中与平面感应耦合结构相邻放置的密封气体封套产生可见光。代表性的平面感应耦合结构包括平面螺旋线圈和平行导体耦合结构。根据本发明，并联导体耦合结构具有两种基本形式：每个由其自身的发电机/调谐电路驱动的单独的并联导体，或由一个发电机/调谐电路驱动的扁平螺旋或一系列方形线圈的单导体。此外，描述了具有一个或多个平行导体感应耦合结构的等离子体产生装置。所得到的等离子体发生器可用于等离子体处理和感应等离子体照明等应用。

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