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公开(公告)号：US20140186024A1
公开(公告)日：2014-07-03
申请号：US13729403
申请日：2012-12-28
IPC分类号： H04B10/08
CPC分类号： H04B10/614 , H04B10/616
摘要： An optical receiver comprising an optical-to-electrical converter and a digital processor having one or more equalizer stages. The optical-to-electrical converter is configured to mix an optical input signal and an optical local-oscillator signal to generate a plurality of electrical digital measures of the optical input signal. The digital processor is configured to process the electrical digital measures to recover the data carried by the optical input signal. At least one of the equalizer stages is configured to perform signal-equalization processing in which the electrical digital measures and/or digital signals derived from the electrical digital measures are being treated as linear combinations of arbitrarily coupled signals, rather than one or more pairs of 90-degree phase-locked I and Q signals. The latter feature enables the digital processor to more-effectively mitigate the receiver-, link-, and/or transmitter-induced signal impairments because various orthogonality-degrading effects can be mitigated in a relatively straightforward manner.
摘要翻译： 一种光接收机，包括光电转换器和具有一个或多个均衡器级的数字处理器。 光 - 电转换器被配置为混合光输入信号和光本地振荡器信号以产生光输入信号的多个电数字测量。 数字处理器被配置为处理电数字措施以恢复由光输入信号携带的数据。 均衡器级中的至少一个被配置为执行信号均衡处理，其中从电数字测量导出的电数字测量和/或数字信号被视为任意耦合信号的线性组合，而不是一对或多对 90度锁相I和Q信号。 后者的特征使得数字处理器可以更有效地减轻接收机，链路和/或发射机诱发的信号损伤，因为可以以相对简单的方式减轻各种正交性降级的影响。
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公开(公告)号：US09077455B2
公开(公告)日：2015-07-07
申请号：US13729403
申请日：2012-12-28
CPC分类号： H04B10/614 , H04B10/616
摘要： An optical receiver comprising an optical-to-electrical converter and a digital processor having one or more equalizer stages. The optical-to-electrical converter is configured to mix an optical input signal and an optical local-oscillator signal to generate a plurality of electrical digital measures of the optical input signal. The digital processor is configured to process the electrical digital measures to recover the data carried by the optical input signal. At least one of the equalizer stages is configured to perform signal-equalization processing in which the electrical digital measures and/or digital signals derived from the electrical digital measures are being treated as linear combinations of arbitrarily coupled signals, rather than one or more pairs of 90-degree phase-locked I and Q signals. The latter feature enables the digital processor to more-effectively mitigate the receiver-, link-, and/or transmitter-induced signal impairments because various orthogonality-degrading effects can be mitigated in a relatively straightforward manner.
摘要翻译： 一种光接收机，包括光电转换器和具有一个或多个均衡器级的数字处理器。 光 - 电转换器被配置为混合光输入信号和光本地振荡器信号以产生光输入信号的多个电数字测量。 数字处理器被配置为处理电数字措施以恢复由光输入信号携带的数据。 均衡器级中的至少一个被配置为执行信号均衡处理，其中从电数字测量导出的电数字测量和/或数字信号被视为任意耦合信号的线性组合，而不是一对或多对 90度锁相I和Q信号。 后者的特征使得数字处理器可以更有效地减轻接收机，链路和/或发射机诱发的信号损伤，因为可以以相对简单的方式减轻各种正交性降级的影响。
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公开(公告)号：US20100329670A1
公开(公告)日：2010-12-30
申请号：US12492391
申请日：2009-06-26
申请人： Rene-Jean Essiambre , Roland Ryf , Peter J. Winzer
发明人： Rene-Jean Essiambre , Roland Ryf , Peter J. Winzer
CPC分类号： H04J14/04 , G02B6/2817 , G02B6/34 , H04B10/2581 , H04B10/60 , H04B10/611 , H04B10/613 , H04B10/614 , H04J14/002 , H04J14/021 , H04J14/06
摘要： A representative optical receiver of the invention receives an optical transverse-mode-multiplexed (TMM) signal through a multimode fiber that supports a plurality of transverse modes. The optical receiver has a plurality of optical detectors operatively coupled to a digital signal processor configured to process the TMM signal to determine its modal composition. Based on the determined modal composition, the optical receiver demodulates each of the independently modulated components of the TMM signal to recover the data encoded onto the TMM signal at the remote transmitter.
摘要翻译： 本发明的代表性光接收机通过支持多个横向模式的多模光纤接收光学横向模复用（TMM）信号。 光接收器具有多个光学检测器，其可操作地耦合到数字信号处理器，该数字信号处理器被配置为处理TMM信号以确定其模态组成。 基于确定的模态组合，光接收机解调TMM信号中的每个独立调制分量，以恢复在远程发射机处编码到TMM信号上的数据。
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4.发明申请公开(公告)号：US20100150559A1
公开(公告)日：2010-06-17
申请号：US12316389
申请日：2008-12-12
IPC分类号： H04J14/02
CPC分类号： H04J14/06
摘要： A WDM system having at least two channels, each of which employs two polarizations, is arranged so that the start times of symbols carried by one polarization of a channel are displaced in time from the start times of symbols carried by the other polarization of that channel, e.g., the start time for each symbol on one polarization is not substantially synchronized with the closest-in-time symbol start time on the other polarization of that channel. Preferably, the data signals are modulated using a return-to-zero (RZ) format and the start times of the symbols of the data signal carried by one polarization of a channel is offset from the start time of the symbols data signal carried by the other polarization of that channel by between 20% to 80%—preferably 50%—of the symbol period of the data signals, when the data signals have the same symbol period.
摘要翻译： 布置具有至少两个通道的WDM系统，每个通道采用两个极化，以使得通道的一个极化所承载的符号的开始时间从该通道的另一个极化所承载的符号的开始时间的时间偏移 例如，一个极化上的每个符号的开始时间基本上与该通道的另一个极化上的最接近时间符号开始时间同步。 优选地，使用归零（RZ）格式对数据信号进行调制，并且通过信道的一个极化承载的数据信号的符号的开始时间偏离由信道携带的符号数据信号的起始时间 当数据信号具有相同的符号周期时，该信道的其它极化在数据信号的符号周期的20％至80％之间优选地为50％。
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公开(公告)号：US08331800B2
公开(公告)日：2012-12-11
申请号：US12652784
申请日：2010-01-06
申请人： Rene-Jean Essiambre , Chongjin Xie
发明人： Rene-Jean Essiambre , Chongjin Xie
CPC分类号： H04B10/25137 , H04B10/25133
摘要： An arrangement is described for compensating intra-channel nonlinearities in an optical communications system which combines optical dispersion compensation with electronic pre-distortion (EPD). EPD with moderate lookup table size can effectively suppress intra-channel nonlinearities over optical transmission links incorporating optical dispersion compensation. The arrangement can be implemented for a variety of optical communications systems, including 10 Gb/s, 40 Gb/s and higher bit rate systems as well as single-channel and wavelength-division multiplexing (WDM) systems.
摘要翻译： 描述了将光学色散补偿与电子预失真（EPD）组合的光通信系统中的用于补偿信道内非线性的装置。 具有中等查找表大小的EPD可以有效地抑制包含光色散补偿的光传输链路的通道内非线性。 该装置可以实现用于各种光通信系统，包括10Gb / s，40Gb / s和更高比特率系统，以及单通道和波分复用（WDM）系统。
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公开(公告)号：US07672599B2
公开(公告)日：2010-03-02
申请号：US11382815
申请日：2006-05-11
申请人： Rene-Jean Essiambre , Chongjin Xie
发明人： Rene-Jean Essiambre , Chongjin Xie
CPC分类号： H04B10/25137 , H04B10/25133
摘要： An arrangement is described for compensating intra-channel nonlinearities in an optical communications system which combines optical dispersion compensation with electronic pre-distortion (EPD). EPD with moderate lookup table size can effectively suppress intra-channel nonlinearities over optical transmission links incorporating optical dispersion compensation. The arrangement can be implemented for a variety of optical communications systems, including 10 Gb/s, 40 Gb/s and higher bit rate systems as well as single-channel and wavelength-division multiplexing (WDM) systems.
摘要翻译： 描述了将光学色散补偿与电子预失真（EPD）组合的光通信系统中的用于补偿信道内非线性的装置。 具有中等查找表大小的EPD可以有效地抑制包含光色散补偿的光传输链路的通道内非线性。 该装置可以实现用于各种光通信系统，包括10Gb / s，40Gb / s和更高比特率系统，以及单通道和波分复用（WDM）系统。
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公开(公告)号：US20060045541A1
公开(公告)日：2006-03-02
申请号：US10932980
申请日：2004-09-02
IPC分类号： H04B10/04
CPC分类号： H04B10/2531
摘要： An apparatus includes a non-solitonic all-optical communication path having serially connected first and second segments. The first segment end-couples to a lumped optical transmitter. The second segment end-couples to a lumped optical receiver. Each segment has a series of spans of transmission optical fibers. The all-optical communication path has an optical phase conjugator that optically end-couples the first segment to the second segment. The optical phase conjugator is positioned away from the path's midpoint.
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公开(公告)号：US20100111542A1
公开(公告)日：2010-05-06
申请号：US12652784
申请日：2010-01-06
申请人： Rene-Jean Essiambre , Chongjin Xie
发明人： Rene-Jean Essiambre , Chongjin Xie
IPC分类号： H04B10/04
CPC分类号： H04B10/25137 , H04B10/25133
摘要： An arrangement is described for compensating intra-channel nonlinearities in an optical communications system which combines optical dispersion compensation with electronic pre-distortion (EPD). EPD with moderate lookup table size can effectively suppress intra-channel nonlinearities over optical transmission links incorporating optical dispersion compensation. The arrangement can be implemented for a variety of optical communications systems, including 10 Gb/s, 40 Gb/s and higher bit rate systems as well as single-channel and wavelength-division multiplexing (WDM) systems.
摘要翻译： 描述了将光学色散补偿与电子预失真（EPD）组合的光通信系统中的用于补偿信道内非线性的装置。 具有中等查找表大小的EPD可以有效地抑制包含光色散补偿的光传输链路的通道内非线性。 该装置可以实现用于各种光通信系统，包括10Gb / s，40Gb / s和更高比特率系统，以及单通道和波分复用（WDM）系统。
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公开(公告)号：US20080069573A1
公开(公告)日：2008-03-20
申请号：US11522785
申请日：2006-09-15
IPC分类号： H04B10/00
CPC分类号： H04B10/25253
摘要： One method configures an all-optical network such that at least eighty percent of optical fiber spans of a portion of a first all-optical path of the network have substantially a first residual dispersion per span and at least eighty percent of optical fiber spans of a remainder of the first all-optical path have residual dispersions per span substantially differing from the first residual dispersion per span. The remainder of the first all-optical path includes an overlap between the first all-optical path and a second all-optical path of the network. The second all-optical path has a plurality of optical fiber spans and a substantially singly periodic dispersion map.
摘要翻译： 一种方法配置全光网络，使得网络的第一全光路径的一部分的至少百分之八十的光纤跨度基本上具有每跨度的第一残余色散和至少百分之八十的光纤跨度 第一全光路的剩余部分具有与每个跨度的第一残余色散基本上不同的跨度的残余色散。 第一全光路的其余部分包括网络的第一全光路和第二全光路之间的重叠。 第二全光路具有多个光纤跨度和基本上单周期性的色散图。
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10.发明申请MAXIMUM LIKELIHOOD SEQUENCE ESTIMATION FOR HIGH SPECTRAL EFFICIENCY OPTICAL COMMUNICATION SYSTEMS 审中-公开用于高光谱效率光通信系统的最大似然序列估计公开(公告)号：US20080199191A1
公开(公告)日：2008-08-21
申请号：US11306177
申请日：2005-12-19
CPC分类号： H04L25/03057 , H04B10/697 , H04L2025/03503 , H04L2025/03605
摘要： Severe inter-symbol interference (ISI), introduced by narrow-band optical filtering in high spectral efficiency wavelength-division multiplexed (WDM) systems to avoid coherent WDM crosstalk, can be substantially mitigated by the use of maximum-likelihood sequence estimation (MLSE) reception. Compared to conventional threshold detection, the use of an MLSE receiver allows, for example, a 22% reduction in optical receive filter bandwidth. For tight optical filtering, the MLSE receiver benefits from taking into account noise correlation. MLSE receivers with one and with two samples per bit are described and it is shown that while oversampling is beneficial for wide-band optical filters, the benefit goes away for narrow-band optical filtering, thereby facilitating MLSE design for rates beyond 10 Gb/s.
摘要翻译： 通过使用最大似然序列估计（MLSE）可以大大减轻在高光谱效率波分复用（WDM）系统中通过窄带光滤波引入的严重符号间干扰（ISI），以避免相干WDM串扰， 接待处 与常规阈值检测相比，使用MLSE接收器允许例如光接收滤波器带宽减少22％。 对于紧密的光学滤波，MLSE接收机可以从考虑噪声相关性中受益。 描述了每位具有一个和两个采样的MLSE接收器，并且示出了虽然过采样对于宽带光滤波器是有益的，但是对于窄带光学滤波，益处将消失，从而有助于MLSE设计的速率超过10Gb / s 。
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