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公开(公告)号：US08320769B2
公开(公告)日：2012-11-27
申请号：US12492399
申请日：2009-06-26
CPC分类号： H04J14/04 , G02B6/14 , G02B6/2817 , G02B6/2848 , G02B6/34 , H04B10/2581 , H04B10/677
摘要： An optical communication system having an optical transmitter and an optical receiver optically coupled via a multi-path fiber. The optical transmitter launches, into the multi-path fiber, an optical transverse-mode-multiplexed (TMM) signal having a plurality of independently modulated components by coupling each independently modulated component into a respective transverse mode of the multi-path fiber. The TMM signal undergoes inter-mode mixing in the multi-path fiber before being received by the optical receiver. The optical receiver processes the received TMM signal to reverse the effects of inter-mode mixing and recover the data carried by each of the independently modulated components.
摘要翻译： 一种光通信系统，具有通过多路径光纤光耦合的光发射机和光接收机。 光发射机通过将每个独立调制的分量耦合到多径光纤的相应横向模式中，将具有多个独立调制分量的光学横向模式多路复用（TMM）信号发射到多径光纤中。 TMM信号在由光接收机接收之前在多路径光纤中进行模式间混合。 光接收器处理接收到的TMM信号以反转模式间混合的影响并恢复由每个独立调制的分量承载的数据。
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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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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：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：US08355638B2
公开(公告)日：2013-01-15
申请号：US12492391
申请日：2009-06-26
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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公开(公告)号：US20100329671A1
公开(公告)日：2010-12-30
申请号：US12492399
申请日：2009-06-26
IPC分类号： H04J14/04
CPC分类号： H04J14/04 , G02B6/14 , G02B6/2817 , G02B6/2848 , G02B6/34 , H04B10/2581 , H04B10/677
摘要： An optical communication system having an optical transmitter and an optical receiver optically coupled via a multi-path fiber. The optical transmitter launches, into the multi-path fiber, an optical transverse-mode-multiplexed (TMM) signal having a plurality of independently modulated components by coupling each independently modulated component into a respective transverse mode of the multi-path fiber. The TMM signal undergoes inter-mode mixing in the multi-path fiber before being received by the optical receiver. The optical receiver processes the received TMM signal to reverse the effects of inter-mode mixing and recover the data carried by each of the independently modulated components.
摘要翻译： 一种光通信系统，具有通过多路径光纤光耦合的光发射机和光接收机。 光发射机通过将每个独立调制的分量耦合到多径光纤的相应横向模式中，将具有多个独立调制分量的光学横向模式多路复用（TMM）信号发射到多径光纤中。 TMM信号在由光接收机接收之前在多路径光纤中进行模式间混合。 光接收器处理接收到的TMM信号以反转模式间混合的影响并恢复由每个独立调制的分量承载的数据。
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7.发明授权Optimum sample spacing in over-sampled maximum likelihood sequence estimation receivers 有权过采样最大似然序列估计接收机中的最佳采样间隔公开(公告)号：US07474860B2
公开(公告)日：2009-01-06
申请号：US11306174
申请日：2005-12-19
IPC分类号： H04B10/06
CPC分类号： H04L25/03178 , H04B10/66
摘要： In an over-sampled maximum-likelihood sequence estimation (MLSE) receiver system, the optimal sample spacing is determined for a variety of conditions. In an illustrative implementation, the system includes an optical filter for tightly filtering an incoming optical data signal with an on-off-keying (OOK) non-return-to-zero (NRZ) format, followed by an optical-to-electrical converter, an electrical filter, a sampler, and a MLSE receiver. The sampler samples the filtered electrical data signal twice each bit period with unequal sample spacings. For wide optical filtering bandwidths, the optimal sample spacing occurs at less than 50% of a bit period. For narrow bandwidths, the optimal sample instances occur closer to the maximum eye opening.
摘要翻译： 在过采样的最大似然序列估计（MLSE）接收机系统中，针对各种条件确定最佳采样间隔。 在说明性实施方案中，该系统包括用于使用开关键（OOK）不归零（NRZ）格式紧密地滤波输入的光数据信号的光学滤波器，随后是光 - 电转换器 ，电气滤波器，采样器和MLSE接收器。 采样器以不相等的样本间隔对滤波后的电数据信号采样两次，每个位周期。 对于宽光学滤波带宽，最佳采样间隔发生在小于位周期的50％。 对于窄带宽，最佳采样实例更接近最大眼睛开度。
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8.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：US20100150577A1
公开(公告)日：2010-06-17
申请号：US12639750
申请日：2009-12-16
CPC分类号： H04B10/5053 , H04B10/5561
摘要： An example method includes modulating an optical signal using a Phase Shift Keying (PSK) signal constellation, wherein signal points of the PSK signal constellation are located on at least two rings. The first ring has a first radius r1 and a second ring has a second radius r2, wherein the first radius and second radius differ, and wherein the signal points are not located on a regular n-dimension lattice, where n is an integer. The regular n-dimension lattice is formed from a minimum number of lines parallel to an axis for each of the n-dimensions that connect ones of the signal points of the PSK signal constellation on either side of an origin of the axis. The second radius may be greater than the first radius, with the second radius a non-integer multiple of the first ring radius.
摘要翻译： 示例性方法包括使用相移键控（PSK）信号星座调制光信号，其中PSK信号星座的信号点位于至少两个环上。 第一环具有第一半径r1，第二环具有第二半径r2，其中第一半径和第二半径不同，并且其中信号点不位于规则的n维晶格上，其中n是整数。 规则的n维格子由平行于轴线的最小数量的线形成，用于连接在轴原点的任一侧的PSK信号星座的信号点中的每一个的n维。 第二半径可以大于第一半径，第二半径是第一环半径的非整数倍。
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10.发明授权Arrangement for generating chirped return to zero (CRZ) optical data signals 有权用于产生啁啾回归（CRZ）光数据信号的布置公开(公告)号：US06693929B1
公开(公告)日：2004-02-17
申请号：US10205643
申请日：2002-07-25
IPC分类号： H01S310
CPC分类号： H04B10/505 , G02F1/225 , G02F2201/126 , H04B10/5051 , H04B10/508
摘要： Optical chirped return-to-zero (CRZ) data signals are generated without the need for a separate phase modulator, by using a dual-drive Mach-Zehnder modulator for RZ pulse carving that is driven with two typically sinusoidal signals of either unequal amplitude or unequal relative phase, i.e. of non-vanishing phase difference.
摘要翻译： 通过使用用于RZ脉冲雕刻的双驱动马赫 - 曾德调制器来驱动具有不等幅度的两个典型的正弦信号，而不需要单独的相位调制器来产生光啁啾回归（CRZ）数据信号 相对相位不相等，即非消失相位差。
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