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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

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。

7. 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。

8. 发明申请

US20130071119A1 COMMUNICATION THROUGH PRE-DISPERSION-COMPENSATED PHASE-CONJUGATED OPTICAL VARIANTS 有权
标题翻译：通过预分散补偿的相位光学变量进行通信
公开(公告)号：US20130071119A1
公开(公告)日：2013-03-21
申请号：US13601236
申请日：2012-08-31
申请人： Xiang Liu , Peter J. Winzer , Andrew Roman Chraplyvy , Robert William Tkach
发明人： Xiang Liu , Peter J. Winzer , Andrew Roman Chraplyvy , Robert William Tkach
IPC分类号： H04B10/18 , H04J14/06
CPC分类号： H04B10/516 , H04B10/25137
摘要： An apparatus comprises an optical transmitter that comprises a processor and at least one optical modulator. The processor is configured to generate electronic representations of at least two pre-dispersion-compensated phase-conjugated optical variants carrying a same modulated payload data for transmission. The at least one optical modulator is configured to modulate the electronic representations, wherein an amount of dispersion induced on the pre-dispersion-compensated phase-conjugated optical variants depends on an accumulated dispersion (AD) of a transmission link through which the pre-dispersion-compensated phase-conjugated optical variants are to be transmitted. The amount of dispersion induced on the phase-conjugated optical variants may be approximately −AD/2, where AD is the accumulated dispersion of the transmission link. The pre-dispersion-compensated phase-conjugated optical variants are different from one another in one or more dimensions such as the polarization of light, the time of transmission, the spatial localization, the optical carrier wavelength, or the subcarrier frequency during transmission.
摘要翻译：一种装置包括光发射机，其包括处理器和至少一个光调制器。处理器被配置为生成携带相同调制有效载荷数据以进行传输的至少两个预色散补偿相位共轭光学变型的电子表示。所述至少一个光调制器被配置为调制电子表示，其中在预色散补偿的相位共轭光学变体上感应的色散量取决于传输链路的累积色散（AD），通过该传播链路的预分散补偿的相位共轭光学变体将被传输。在相位共轭光学变体上引起的色散量可以近似为-AD / 2，其中AD是传输链路的累积色散。预色散补偿相位共轭光学变体在一个或多个维度上彼此不同，例如光的偏振，透射时间，空间定位，光载波波长或透射期间的副载波频率。

9. 发明授权

US08824501B2 Performance enhancement through optical variants 有权
标题翻译：通过光学变体提高性能
公开(公告)号：US08824501B2
公开(公告)日：2014-09-02
申请号：US13245160
申请日：2011-09-26
申请人： Xiang Liu , Peter J. Winzer , Andrew Chraplyvy
发明人： Xiang Liu , Peter J. Winzer , Andrew Chraplyvy
IPC分类号： H04B10/00
CPC分类号： C02F1/78 , H04B10/00 , H04B10/516 , H04B10/61 , Y02W10/37
摘要： An optical transport system configured to transmit a set of two or more optical variants per bit-word, with the optical variants in the set being different from one another in one or more of the time of transmission, spatial localization, polarization of light, carrier wavelength, and subcarrier frequency. Differences between the optical variants may also be due to different respective constellation mapping. The optical variants of each set are detected and processed at the receiver in a manner that enables coherent summation of the corresponding electrical signals prior to constellation de-mapping. The coherent summation tends to average out the deleterious effects of linear and nonlinear noise/distortions imparted on the individual optical variants in the optical transport link because said noise/distortions are incoherent in nature. A BER reduction enabled by the use of optical variants may be implemented in addition to or instead of that provided by FEC coding.
摘要翻译：一种光传输系统，被配置为在每个位字发送一组两个或更多个光学变体，其中所述组中的光学变体在传输时间，空间定位，光的偏振，载波的一个或多个中彼此不同波长和副载波频率。光学变体之间的差异也可能是由于不同的星座映射。每个组的光学变体在接收机处被检测和处理，使得能够在星座解映射之前对相应的电信号进行相干相加。相干相加倾向于平均在光传输链路中赋予各个光学变体的线性和非线性噪声/失真的有害影响，因为所述噪声/失真本质上是不相干的。除了由FEC编码提供的BER之外，也可以通过使用光学变体来实现BER减小。

10. 发明申请

US20130070785A1 PERFORMANCE ENHANCEMENT THROUGH OPTICAL VARIANTS 有权
标题翻译：通过光学变化的性能提升
公开(公告)号：US20130070785A1
公开(公告)日：2013-03-21
申请号：US13245160
申请日：2011-09-26
申请人： Xiang Liu , Peter J. Winzer , Andrew Chraplyvy
发明人： Xiang Liu , Peter J. Winzer , Andrew Chraplyvy
IPC分类号： H04B10/00 , H04J14/00
CPC分类号： C02F1/78 , H04B10/00 , H04B10/516 , H04B10/61 , Y02W10/37
摘要： An optical transport system configured to transmit a set of two or more optical variants per bit-word, with the optical variants in the set being different from one another in one or more of the time of transmission, spatial localization, polarization of light, carrier wavelength, and subcarrier frequency. Differences between the optical variants may also be due to different respective constellation mapping. The optical variants of each set are detected and processed at the receiver in a manner that enables coherent summation of the corresponding electrical signals prior to constellation de-mapping. The coherent summation tends to average out the deleterious effects of linear and nonlinear noise/distortions imparted on the individual optical variants in the optical transport link because said noise/distortions are incoherent in nature. A BER reduction enabled by the use of optical variants may be implemented in addition to or instead of that provided by FEC coding.
摘要翻译：一种光传输系统，被配置为在每个位字发送一组两个或更多个光学变体，其中所述组中的光学变体在传输时间，空间定位，光的偏振，载波的一个或多个中彼此不同波长和副载波频率。光学变体之间的差异也可能是由于不同的星座映射。每个组的光学变体在接收机处被检测和处理，使得能够在星座解映射之前对相应的电信号进行相干相加。相干相加倾向于平均在光传输链路中赋予各个光学变体的线性和非线性噪声/失真的有害影响，因为所述噪声/失真本质上是不相干的。除了由FEC编码提供的BER之外，也可以通过使用光学变体来实现BER减小。

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