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1. 发明授权

US09344779B2 Method and apparatus for space-division multiplexing systems 有权
标题翻译：空分复用系统的方法和装置
公开(公告)号：US09344779B2
公开(公告)日：2016-05-17
申请号：US13602722
申请日：2012-09-04
申请人： Chandrasekhar Sethumadhavan , Xiang Liu , Peter J. Winzer , Alan H. Gnauck
发明人： Chandrasekhar Sethumadhavan , Xiang Liu , Peter J. Winzer , Alan H. Gnauck
IPC分类号： G02B6/036 , H04Q11/00 , G02B6/293 , H04J14/04 , H04J14/00 , H04J14/02 , G02B6/26 , G02B6/02
CPC分类号： H04Q11/0003 , G02B6/02042 , G02B6/26 , G02B6/29383 , H04J14/00 , H04J14/02 , H04J14/021 , H04J14/0212 , H04J14/04
摘要： A space division multiplexed (SDM) transmission system that includes at least two segments of transmission media in which a spatial assignment of the two segments is different is provided. For example, the SDM transmission may include a first segment of transmission media having a first spatial assignment and a second segment of transmission media having a second spatial assignment, wherein the first spatial assignment differs from the second spatial assignment. An example method obtains an optical signal on a first segment of transmission media having a first spatial assignment and forwards the optical signal on a second segment of transmission media with a different spatial assignment. The transmission media may be a multi-core fiber (MCF), a multi-mode fiber (MMF), a few-mode fiber (FMF), or a ribbon cable comprising nominally uncoupled single-mode fiber (SMF).
摘要翻译：提供了包括两个段的空间分配不同的至少两个传输介质段的空分复用（SDM）传输系统。例如，SDM传输可以包括具有第一空间分配的传输介质的第一段和具有第二空间分配的传输介质的第二段，其中第一空间分配与第二空间分配不同。示例性方法在具有第一空间分配的传输介质的第一段上获得光信号，并且在具有不同空间分配的第二传输介质段上转发光信号。传输介质可以是多芯光纤（MCF），多模光纤（MMF），多模光纤（FMF）或包括名义上脱耦单模光纤（SMF）的带状电缆）。

2. 发明授权

US09203682B2 Frequency-dependent I/Q-signal imbalance correction coherent optical transceivers 有权
标题翻译：频率依赖的I / Q信号不平衡校正相干光收发器
公开(公告)号：US09203682B2
公开(公告)日：2015-12-01
申请号：US12876489
申请日：2010-09-07
申请人： Peter J. Winzer , Xiang Liu , Chandrasekhar Sethumadhavan , Alan H. Gnauck
发明人： Peter J. Winzer , Xiang Liu , Chandrasekhar Sethumadhavan , Alan H. Gnauck
IPC分类号： H04B10/00 , H04L27/38 , H04B10/60 , H04B10/61 , H04L27/00
CPC分类号： H04L27/3863 , H04B10/60 , H04B10/611 , H04B10/613 , H04L27/0014
摘要： In one embodiment, a coherent optical receiver has a digital signal processor that processes one or more digital I/Q-signal pairs to recover data carried by a modulated optical signal in a manner that mitigates, based on calibration data retrieved from a memory or on appropriate performance measures and feedback mechanisms, the detrimental effects of frequency-dependent imbalances between the I and Q sub-channels of at least one of the I/Q channels of the receiver. In various embodiments, the calibration data can be generated and written into the memory at the fabrication facility or in situ while the receiver is being operated in a calibration mode. Alternatively or in addition, the calibration data can be generated and dynamically adjusted online during normal operation of the receiver.
摘要翻译：在一个实施例中，相干光接收器具有数字信号处理器，其处理一个或多个数字I / Q信号对以恢复由调制的光信号携带的数据，其方法是基于从存储器或从存储器检索的校准数据减轻适当的性能测量和反馈机制，接收机的至少一个I / Q信道的I和Q子信道之间频率不平衡的有害影响。在各种实施例中，在接收器以校准模式操作的同时，校准数据可以在制造设备处或在原位产生并写入存储器。或者或另外，校准数据可以在接收机的正常操作期间在线生成和动态调整。

3. 发明申请

US20130236175A1 Method And Apparatus For Space-Division Multiplexing Systems 有权
标题翻译：空分复用系统的方法与装置
公开(公告)号：US20130236175A1
公开(公告)日：2013-09-12
申请号：US13602722
申请日：2012-09-04
申请人： Chandrasekhar Sethumadhavan , Xiang Liu , Peter J. Winzer , Alan H. Gnauck
发明人： Chandrasekhar Sethumadhavan , Xiang Liu , Peter J. Winzer , Alan H. Gnauck
IPC分类号： H04Q11/00
CPC分类号： H04Q11/0003 , G02B6/02042 , G02B6/26 , G02B6/29383 , H04J14/00 , H04J14/02 , H04J14/021 , H04J14/0212 , H04J14/04
摘要： A space division multiplexed (SDM) transmission system that includes at least two segments of transmission media in which a spatial assignment of the two segments is different is provided. For example, the SDM transmission may include a first segment of transmission media having a first spatial assignment and a second segment of transmission media having a second spatial assignment, wherein the first spatial assignment differs from the second spatial assignment. An example method obtains an optical signal on a first segment of transmission media having a first spatial assignment and forwards the optical signal on a second segment of transmission media with a different spatial assignment. The transmission media may be a multi-core fiber (MCF), a multi-mode fiber (MMF), a few-mode fiber (FMF), or a ribbon cable comprising nominally uncoupled single-mode fiber (SMF).
摘要翻译：提供了包括两个段的空间分配不同的至少两个传输介质段的空分复用（SDM）传输系统。例如，SDM传输可以包括具有第一空间分配的传输介质的第一段和具有第二空间分配的传输介质的第二段，其中第一空间分配与第二空间分配不同。示例性方法在具有第一空间分配的传输介质的第一段上获得光信号，并且在具有不同空间分配的第二传输介质段上转发光信号。传输介质可以是多芯光纤（MCF），多模光纤（MMF），多模光纤（FMF）或包括名义上脱耦单模光纤（SMF）的带状电缆）。

4. 发明申请

US20120057863A1 FREQUENCY-DEPENDENT I/Q-SIGNAL IMBALANCE CORRECTION FOR COHERENT OPTICAL TRANSCEIVERS 有权
标题翻译：频率依赖的I / Q信号不平衡校正光信号收发器
公开(公告)号：US20120057863A1
公开(公告)日：2012-03-08
申请号：US12876489
申请日：2010-09-07
申请人： Peter J. Winzer , Xiang Liu , Chandrasekhar Sethumadhavan , Alan H. Gnauck
发明人： Peter J. Winzer , Xiang Liu , Chandrasekhar Sethumadhavan , Alan H. Gnauck
IPC分类号： H04B10/04 , H04B10/06
CPC分类号： H04L27/3863 , H04B10/60 , H04B10/611 , H04B10/613 , H04L27/0014
摘要： In one embodiment, a coherent optical receiver has a digital signal processor that processes one or more digital I/Q-signal pairs to recover data carried by a modulated optical signal in a manner that mitigates, based on calibration data retrieved from a memory or on appropriate performance measures and feedback mechanisms, the detrimental effects of frequency-dependent imbalances between the I and Q sub-channels of at least one of the I/Q channels of the receiver. In various embodiments, the calibration data can be generated and written into the memory at the fabrication facility or in situ while the receiver is being operated in a calibration mode. Alternatively or in addition, the calibration data can be generated and dynamically adjusted online during normal operation of the receiver.
摘要翻译：在一个实施例中，相干光接收器具有数字信号处理器，其处理一个或多个数字I / Q信号对以恢复由调制的光信号携带的数据，其方法是基于从存储器或从存储器检索的校准数据减轻适当的性能测量和反馈机制，接收机的至少一个I / Q信道的I和Q子信道之间频率不平衡的有害影响。在各种实施例中，在接收器以校准模式操作的同时，校准数据可以在制造设备处或在原位产生并写入存储器。或者或另外，校准数据可以在接收机的正常操作期间在线生成和动态调整。

5. 发明申请

US20140029957A1 FREQUENCY EQUALIZATION FOR AN OPTICAL TRANSMITTER 有权
标题翻译：用于光学发射机的频率均衡
公开(公告)号：US20140029957A1
公开(公告)日：2014-01-30
申请号：US13556635
申请日：2012-07-24
申请人： Chandrasekhar Sethumadhavan , Xiang Liu , Peter J. Winzer , Andrew Chraplyvy
发明人： Chandrasekhar Sethumadhavan , Xiang Liu , Peter J. Winzer , Andrew Chraplyvy
IPC分类号： H04B10/04
CPC分类号： H04B10/588
摘要： An optical transmitter configured to perform digital signal equalization directed at mitigating the detrimental effects of a frequency roll-off in the transmitter's optical I-Q modulator. In various embodiments, a frequency-dependent spectral-correction function used for the digital signal equalization can be constructed to cause the spectrum of the modulated optical signal generated by the transmitter to have a desired degree of flatness in the vicinity of an optical carrier frequency and/or to at least partially mirror the frequency roll-off in the optical I-Q modulator.
摘要翻译：一种光发射机，被配置为执行数字信号均衡，以减轻发射机的光学I-Q调制器中的频率滚降的有害影响。在各种实施例中，可以构造用于数字信号均衡的频率依赖频谱校正功能，以使由发射机产生的调制光信号的频谱在光载波频率附近具有期望的平坦度， /或至少部分地反映光学IQ调制器中的频率滚降。

6. 发明授权

US09300400B2 Communication through multiplexed one-dimensional optical signals 有权
标题翻译：通过多路复用一维光信号进行通信
公开(公告)号：US09300400B2
公开(公告)日：2016-03-29
申请号：US13731738
申请日：2012-12-31
申请人： Xiang Liu , Peter J Winzer , Andrew R Chraplyvy , Robert W Tkach , Chandrasekhar Sethumadhavan
发明人： Xiang Liu , Peter J Winzer , Andrew R Chraplyvy , Robert W Tkach , Chandrasekhar Sethumadhavan
IPC分类号： H04B10/12 , H04B10/2507 , H04B10/2513 , H04B10/516 , H04B10/50
CPC分类号： H04B10/2507 , H04B10/25137 , H04B10/5053 , H04B10/516
摘要： An example apparatus comprises an optical transmitter which includes a first processor and at least two optical modulators. The first processor is configured to generate a first electronic representation for each of at least two optical signals for carrying payload data modulated according to a one-dimensional (1-D) modulation format, and to induce on respective ones of the first electronic representations an amount of dispersion that depends on a power-weighted accumulated dispersion (ADPW) of a transmission link through which the at least two optical signals are to be transmitted thereby generating complex-valued electronic representations of pre-dispersion-compensated optical signals. Each of the at least two optical modulators modulate a respective analog version corresponding to a respective one of the complex-valued electronic representations onto a polarization of an optical carrier.
摘要翻译：示例性装置包括光发射机，其包括第一处理器和至少两个光调制器。第一处理器被配置为为至少两个光信号中的每一个生成用于承载根据一维（1-D）调制格式调制的有效载荷数据的第一电子表示，并且在第一电子表示中的相应的一个取决于要发送至少两个光信号的传输链路的功率加权累积色散（ADPW）的色散量，从而生成预色散补偿光信号的复值电子表示。所述至少两个光调制器中的每一个将对应于复值电子表示的相应模拟版本调制到光载波的偏振上。

7. 发明授权

US08923706B2 Frequency equalization for an optical transmitter 有权
标题翻译：光发射机的频率均衡
公开(公告)号：US08923706B2
公开(公告)日：2014-12-30
申请号：US13556635
申请日：2012-07-24
申请人： Chandrasekhar Sethumadhavan , Xiang Liu , Peter J. Winzer , Andrew Chraplyvy
发明人： Chandrasekhar Sethumadhavan , Xiang Liu , Peter J. Winzer , Andrew Chraplyvy
IPC分类号： H04B10/04 , H04B10/12
CPC分类号： H04B10/588
摘要： An optical transmitter configured to perform digital signal equalization directed at mitigating the detrimental effects of a frequency roll-off in the transmitter's optical I-Q modulator. In various embodiments, a frequency-dependent spectral-correction function used for the digital signal equalization can be constructed to cause the spectrum of the modulated optical signal generated by the transmitter to have a desired degree of flatness in the vicinity of an optical carrier frequency and/or to at least partially mirror the frequency roll-off in the optical I-Q modulator.
摘要翻译：一种光发射机，被配置为执行数字信号均衡，以减轻发射机的光学I-Q调制器中的频率滚降的有害影响。在各种实施例中，可以构造用于数字信号均衡的频率依赖频谱校正功能，以使由发射机产生的调制光信号的频谱在光载波频率附近具有期望的平坦度， /或至少部分地反映光学IQ调制器中的频率滚降。

8. 发明申请

US20130136449A1 COMMUNICATION THROUGH MULTIPLEXED ONE-DIMENSIONAL OPTICAL SIGNALS 有权
标题翻译：通过多路复用一维光信号进行通信
公开(公告)号：US20130136449A1
公开(公告)日：2013-05-30
申请号：US13731738
申请日：2012-12-31
申请人： Xiang Liu , Peter J. Winzer , Andrew R. Chraplyvy , Robert W. Tkach , Chandrasekhar Sethumadhavan
发明人： Xiang Liu , Peter J. Winzer , Andrew R. Chraplyvy , Robert W. Tkach , Chandrasekhar Sethumadhavan
IPC分类号： H04B10/2507
CPC分类号： H04B10/2507 , H04B10/25137 , H04B10/5053 , H04B10/516
摘要： An example apparatus comprises an optical transmitter which includes a first processor and at least two optical modulators. The first processor is configured to generate a first electronic representation for each of at least two optical signals for carrying payload data modulated according to a one-dimensional (1-D) modulation format, and to induce on respective ones of the first electronic representations an amount of dispersion that depends on a power-weighted accumulated dispersion (ADPW) of a transmission link through which the at least two optical signals are to be transmitted thereby generating complex-valued electronic representations of pre-dispersion-compensated optical signals. Each of the at least two optical modulators modulate a respective analog version corresponding to a respective one of the complex-valued electronic representations onto a polarization of an optical carrier.
摘要翻译：示例性装置包括光发射机，其包括第一处理器和至少两个光调制器。第一处理器被配置为为至少两个光信号中的每一个生成用于承载根据一维（1-D）调制格式调制的有效载荷数据的第一电子表示，并且在第一电子表示中的相应的一个取决于要发送至少两个光信号的传输链路的功率加权累积色散（ADPW）的色散量，从而生成预色散补偿光信号的复值电子表示。所述至少两个光调制器中的每一个将对应于复值电子表示的相应模拟版本调制到光载波的极化。

9. 发明申请

US20120177372A1 Apparatus And Method For Generating Interleaved Return-To-Zero (IRZ) Polarization-Division Multiplexed (PDM) Signals 有权
标题翻译：用于生成交错归零（IRZ）偏振分复用（PDM）信号的装置和方法
公开(公告)号：US20120177372A1
公开(公告)日：2012-07-12
申请号：US12985835
申请日：2011-01-06
申请人： Xiang Liu , Chandrasekhar Sethumadhavan
发明人： Xiang Liu , Chandrasekhar Sethumadhavan
IPC分类号： H04J14/06 , H04B10/00
CPC分类号： H04B10/532 , H04B10/5053 , H04B10/5055 , H04B10/508 , H04B10/5162 , H04B10/5561
摘要： Return To Zero (RZ) shaping is performed for a first I/Q modulator whose output corresponds to a first polarization component using a first two digital-to-analog convertors (DACs), each of which is sampled at approximately twice a modulation symbol rate or more and has an output with a first interleaving order that interleaves one of a first pair of intended drive signal patterns and zeros. RZ shaping is also performed for a second I/Q modulator whose output corresponds to a second polarization component using a second two DACs, each sampled at approximately twice the modulation symbol rate or more and having a second interleaving order that interleaves zeros and one of a second pair of intended drive signal patterns, the second interleaving order opposite the first interleaving order. The first polarization and the second polarization may be combined, thereby forming an Interleaved Return To Zero (IRZ) Polarization Division Multiplexed (PDM) signal.
摘要翻译：对于其输出对应于使用前两个数模转换器（DAC）的第一偏振分量的第一I / Q调制器执行归零（RZ）整形，其中每一个被调制大约是调制符号率的两倍或具有具有交织第一对预期驱动信号模式和零之一的第一交错顺序的输出。还对第二I / Q调制器执行RZ整形，其第二I / Q调制器的输出对应于使用第二两个DAC的第二偏振分量，每个DAC以大约两倍的调制符号速率被采样，并且具有第二交织顺序，交织零和一个第二对预期驱动信号模式，第二交织顺序与第一交错顺序相反。可以组合第一偏振和第二偏振，从而形成交错回零（IRZ）偏振分复用（PDM）信号。

10. 发明申请

US20120148255A1 PILOT-ASSISTED DATA TRANSMISSION IN A COHERENT OPTICAL-COMMUNICATION SYSTEM 有权
标题翻译：在相关的光通信系统中的辅助数据传输
公开(公告)号：US20120148255A1
公开(公告)日：2012-06-14
申请号：US12964929
申请日：2010-12-10
申请人： Xiang Liu , Chandrasekhar Sethumadhavan
发明人： Xiang Liu , Chandrasekhar Sethumadhavan
IPC分类号： H04B10/04 , H04B10/00
CPC分类号： H04L25/0226 , H04B10/50 , H04L25/0224
摘要： In one embodiment, an optical transmission system transmits data using a format according to which a data frame has two or more pilot-symbol blocks, each having a guard interval, and two or more payload-symbol blocks that are concatenated without a guard interval between them. The use of guard intervals in the pilot-symbol blocks helps the synchronization and channel-estimation procedures performed at a receiver of the optical transmission system to be robust in the presence of certain transmission impairments. The absence of guard intervals in the payload-symbol blocks helps to minimize the transmission overhead and thus achieve relatively high payload-data throughput. Pilot-symbol blocks have a structure that enables the receiver to determine channel-response characteristics for each data frame and then apply appropriate channel-response-compensation procedures to signals corresponding to the payload-symbol blocks of the frame to recover, with a relatively low bit-error rate, the data encoded in those signals.
摘要翻译：在一个实施例中，光传输系统使用格式来传输数据，根据该格式，数据帧具有两个或更多个导频符号块，每个导频符号块具有保护间隔，以及两个或更多个有效载荷符号块，其间没有保护间隔他们。在导频符号块中使用保护间隔有助于在存在某些传输损伤的情况下在光传输系统的接收机处执行的同步和信道估计过程是鲁棒的。有效载荷符号块中没有保护间隔有助于最小化传输开销，从而实现相对较高的有效载荷数据吞吐量。导频符号块具有使得接收机能够确定每个数据帧的信道响应特性的结构，然后对相应于该帧的有效载荷符号块的信号应用适当的信道响应 - 补偿程序以相对较低的频率位错误率，这些信号中编码的数据。

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