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1. 发明申请

WO2011037806A1 DIGITAL COHERENT DETECTION OF MULTI-CARRIER OPTICAL SIGNAL 审中-公开
标题翻译：多载波光信号的数字相关检测
公开(公告)号：WO2011037806A1
公开(公告)日：2011-03-31
申请号：PCT/US2010/049019
申请日：2010-09-16
申请人： ALCATEL-LUCENT USA INC. , LIU, Xiang , SETHUMADHAVAN, Chandrasekhar , TKACH, Robert, William
发明人： LIU, Xiang , SETHUMADHAVAN, Chandrasekhar , TKACH, Robert, William
IPC分类号： H04B10/148 , H04B10/158 , H04J14/02
CPC分类号： H04B10/675 , H04B10/61 , H04B10/614 , H04B10/6161 , H04B10/6165
摘要： Embodiments for optical communication are provided in which subbands of a multi- carrier optical signal are digital coherent detected and then processed to recover data carried by the modulated carriers corresponding to at least one of the subbands. An exemplary optical communication system includes a multi-carrier coherent optical receiver for receiving a multi-carrier optical signal having M modulated carriers that are frequency locked, wherein M is greater than 2. The multi-carrier coherent optical receiver includes a subband digital coherent detector configured to provide output signals in a digital form for N different subbands of the multi-carrier optical signal, where N is an integer greater than 1 and less than M; and a digital signal processor configured to process the digital form of the detected output signals in order to recover the data carried by the modulated carriers corresponding to at least one of the subbands of the multicarrier optical signal.
摘要翻译：提供了用于光通信的实施例，其中多载波光信号的子带被数字相干检测，然后被处理以恢复由至少一个子带对应的调制载波承载的数据。示例性光通信系统包括多载波相干光接收机，用于接收具有频率锁定的M个调制载波的多载波光信号，其中M大于2.多载波相干光接收机包括子带数字相干检测器被配置为为多载波光信号的N个不同子带提供数字形式的输出信号，其中N是大于1且小于M的整数; 以及数字信号处理器，被配置为处理检测到的输出信号的数字形式，以便恢复与多载波光信号的至少一个子带对应的调制载波承载的数据。

2. 发明申请

WO2013040129A1 COMMUNICATION THROUGH PRE-DISPERSION-COMPENSATED PHASE-CONJUGATED OPTICAL VARIANTS 审中-公开
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：WO2013040129A1
公开(公告)日：2013-03-21
申请号：PCT/US2012/055012
申请日：2012-09-13
申请人： ALCATEL-LUCENT USA INC. , LIU, Xiang , CHRAPLYVY, Andrew, Roman , TKACH, Robert, William , WINZER, Peter, J.
发明人： LIU, Xiang , CHRAPLYVY, Andrew, Roman , TKACH, Robert, William , WINZER, Peter, J.
IPC分类号： H04B10/155
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。

3. 发明申请

WO2013040004A1 COMMUNICATION THROUGH PHASE-CONJUGATED OPTICAL VARIANTS 审中-公开
标题翻译：通过相位相关的光学变量进行通信
公开(公告)号：WO2013040004A1
公开(公告)日：2013-03-21
申请号：PCT/US2012/054813
申请日：2012-09-12
申请人： ALCATEL-LUCENT USA INC. , LIU, Xiang , CHRAPLYVY, Andrew, Roman , TKACH, Robert, William , WINZER, Peter, J.
发明人： LIU, Xiang , CHRAPLYVY, Andrew, Roman , TKACH, Robert, William , WINZER, Peter, J.
IPC分类号： H04B10/155 , H04B10/158
CPC分类号： C02F1/78 , H04B10/00 , H04B10/516 , H04B10/61 , Y02W10/37
摘要： An optical transport system configured to transmit at least two phase- conjugated optical variants carrying the same modulated symbols, with the phase- conjugated optical variants in being different from one another in one or more of polarization of light, the time of transmission, spatial localization, optical carrier wavelength, and subcarrier frequency during transmission. The two phase-conjugated optical variants can be generated by a single polarization-diversity transmitter to be orthogonally polarized, and propagate through an optical transmission link with the same wavelength and spatial path. The optical variants 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 cancel out the deleterious effects of nonlinear distortions imparted on the individual phase-conjugated optical variants in an optical fiber transmission link because said nonlinear distortions tend to be opposite to each other.
摘要翻译：一种光传输系统，被配置为传送携带相同调制符号的至少两个相位共轭光学变体，其中所述相位共轭光学变体在一个或多个光偏振中的彼此不同，透射时间，空间定位，光载波波长，以及传输期间的副载波频率。两个相位共轭的光学变型可以由单个偏振分集发射器产生，以被正交极化，并且通过具有相同波长和空间路径的光传输链路传播。在接收机处以这样的方式检测和处理光学变体，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。相干相加倾向于抵消由于所述非线性失真倾向于彼此相反而在光纤传输链路中赋予单个相位共轭光学变型的非线性失真的有害影响。

4. 发明申请

WO2013033703A1 METHOD AND APPARATUS FOR SPACE-DIVISION MULTIPLEXING SYSTEMS 审中-公开
标题翻译：空间多路复用系统的方法与装置
公开(公告)号：WO2013033703A1
公开(公告)日：2013-03-07
申请号：PCT/US2012/053663
申请日：2012-09-04
申请人： ALCATEL-LUCENT USA INC. , SETHUMADHAVAN, Chandrasekhar , LIU, Xiang , WINZER, Peter, J. , GNAUCK, Alan, H.
发明人： SETHUMADHAVAN, Chandrasekhar , LIU, Xiang , WINZER, Peter, J. , GNAUCK, Alan, H.
IPC分类号： H04J14/04 , G02B6/26
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传输介质的第二段上转发光信号。传输介质可以是多芯光纤（MCF），多模光纤（MMF），多模光纤（FMF）或包括名义上未耦合的单模光纤（SMF）的带状电缆）。

5. 发明申请

WO2010021661A1 SYSTEM AND METHOD FOR RECEIVING HIGH SPECTRAL EFFICIENCY OPTICAL DPSK SIGNALS 审中-公开
标题翻译：用于接收高光谱效率的光学DPSK信号的系统和方法
公开(公告)号：WO2010021661A1
公开(公告)日：2010-02-25
申请号：PCT/US2009/004481
申请日：2009-08-05
申请人： ALCATEL-LUCENT USA INC. , LIU, Xiang , SETHUMADHAVAN, Chandrasekhar , CHRAPLYVY, Andrew, Roman
发明人： LIU, Xiang , SETHUMADHAVAN, Chandrasekhar , CHRAPLYVY, Andrew, Roman
IPC分类号： H04B10/158
CPC分类号： H04B10/677
摘要： Apparatus and methods are provided for receiving differential phase-shift keyed (DPSK) optical signals subjected to tight optical filtering, such as may be experienced by 40 Gb/s and 100 Gb/s channels in a dense wavelength division multiplexing (DWDM) communications system with 50 GHz channel spacing. An optical DPSK receiver is described which employs an optical delay interferometer (ODI) demodulator having a free spectral range (FSR) that is larger than the symbol rate (SR) of the DPSK signal to be demodulated. The receiver includes means for introducing an additional power imbalance between the outputs of the ODI demodulator, and the additional power imbalance may be related to the ratio of FSR to SR. The additional power imbalance increases the signal tolerance to tight optical filtering, thereby achieving high spectral efficiency in applications such as DWDM.
摘要翻译：提供了用于接收经受紧密光学滤波的差分相移键控（DPSK）光信号的装置和方法，例如在密集波分复用（DWDM）通信系统中可能经历40Gb / s和100Gb / s信道具有50GHz信道间隔。描述了一种光学DPSK接收机，其采用具有大于待解调的DPSK信号的符号速率（SR）的自由频谱范围（FSR）的光学延迟干涉仪（ODI）解调器。接收机包括用于在ODI解调器的输出之间引入附加功率不平衡的装置，并且附加功率不平衡可以与FSR与SR的比率有关。额外的功率不平衡增加了对严格光学滤波的信号容限，从而在诸如DWDM的应用中实现高频谱效率。

6. 发明申请

WO2012094452A1 APPARATUS AND METHOD FOR GENERATING INTERLEAVED RETURN-TO-ZERO (IRZ) POLARIZATION-DIVISION MULTIPLEXED (PDM) SIGNALS 审中-公开
标题翻译：用于产生交替返回零（IRZ）极化多路复用（PDM）信号的装置和方法
公开(公告)号：WO2012094452A1
公开(公告)日：2012-07-12
申请号：PCT/US2012/020270
申请日：2012-01-05
申请人： ALCATEL LUCENT , LIU, Xiang , SETHUMADHAVAN, Chandrasekhar
发明人： LIU, Xiang , SETHUMADHAVAN, Chandrasekhar
IPC分类号： H04B10/155
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 converters (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。

7. 发明申请

WO2010080721A1 MULTI-WAVELENGTH COHERENT RECEIVER WITH A SHARED OPTICAL HYBRID AND A MULTI-WAVELENGTH LOCAL OSCILLATOR 审中-公开
标题翻译：具有共享光学混合和多波长局部振荡器的多波长相干接收器
公开(公告)号：WO2010080721A1
公开(公告)日：2010-07-15
申请号：PCT/US2010/020005
申请日：2010-01-04
申请人： ALCATEL-LUCENT USA INC. , LIU, Xiang
发明人： LIU, Xiang
IPC分类号： H04B10/148
CPC分类号： H04B10/614 , H04B10/61 , H04B10/611 , H04B10/613
摘要： An exemplary apparatus for digital coherent detection of a multi -wavelength signal includes a polarization-diversity optical hybrid, at least four Wavelength De- Multiplexing (W-DMUX) filters, 4M detectors, and 4M analog-to-digital converters (ADCs), with M an integer greater than one. The hybrid has a first input for receiving a multi -wavelength signal including M sub-channels at different wavelengths, and a second input for receiving a reference light source including M continuous-wave references at different wavelengths that approximates center wavelengths of the M sub-channels. The hybrid has at least four outputs. A W-DMUX input for each W-DMUX filter is provided a corresponding one of the hybrid outputs, and each W-DMUX filter provides M filtered optical channel outputs. Each detector converts at least one of the filtered channel outputs into a corresponding electrical signal. Each ADC converts one of the electrical signals into a corresponding digital signal. The corresponding digital signals represent the M sub-channels.
摘要翻译：用于多波长信号的数字相干检测的示例性装置包括偏振分集光混合，至少四个波长去复用（W-DMUX）滤波器，4M检测器和4M模数转换器（ADC）， M为大于1的整数。混合器具有用于接收包括不同波长的M个子通道的多波长信号的第一输入端和用于接收包括M个不同波长的M个连续波基准的参考光源的第二输入，通道。混合动力具有至少四个输出。每个W-DMUX滤波器的W-DMUX输入端提供相应的一个混合输出，每个W-DMUX滤波器提供M个滤波后的光信道输出。每个检测器将至少一个滤波后的通道输出转换成相应的电信号。每个ADC将一个电信号转换成相应的数字信号。相应的数字信号表示M个子通道。

8. 发明申请

WO2010002425A1 APPARATUS AND METHOD FOR IMPROVING THE TOLERANCE OF TONE-BASED OPTICAL CHANNEL MONITORING TO STIMULATED RAMAN SCATTERING 审中-公开
标题翻译：改进基于色调的光通道监测对刺激拉曼散射的装置和方法
公开(公告)号：WO2010002425A1
公开(公告)日：2010-01-07
申请号：PCT/US2009/002964
申请日：2009-05-13
申请人： ALCATEL-LUCENT USA INC. , JIANG, Song , KELLY, Colin, G. , LIU, Xiang , REMEDIOS, Derrick, A.
发明人： JIANG, Song , KELLY, Colin, G. , LIU, Xiang , REMEDIOS, Derrick, A.
IPC分类号： H04J14/02 , H04B10/08
CPC分类号： H04J14/0221 , H04B10/0775 , H04B2210/075 , H04J14/0227 , H04J14/0258 , H04J14/0276 , H04J14/0298
摘要： For wavelength division multiplexing (WDM) communications, apparatus and methods are provided for performing tone-based optical channel monitoring that is less sensitive to stimulated Raman scattering (SRS). In tone-based optical channel monitoring, in which WDM channels are modulated with one or more tones, detecting and measuring the tone power is commonly used as a measure of signal power in each channel. In WDM systems with long fiber spans and high signal powers, however, SRS tends to transfer energy from shorter wavelengths to longer wavelengths, whereby the tones are no longer accurately indicative of the signal power of the individual wavelength channels. Apparatus and methods are provided which reduce the effect of SRS by filtering the monitored WDM signals into sub-bands and detecting each sub-band independently.
摘要翻译：对于波分复用（WDM）通信，提供了用于执行对受激拉曼散射（SRS）较不敏感的基于色调的光信道监视的装置和方法。在基于色调的光信道监视中，其中WDM信道用一个或多个音调进行调制，检测和测量音调功率通常用作每个信道中信号功率的度量。然而，在具有长光纤跨距和高信号功率的WDM系统中，SRS倾向于将能量从较短波长传输到较长波长，由此音调不再准确地指示各个波长信道的信号功率。提供了通过将监视的WDM信号滤波成子带并独立地检测每个子带来降低SRS的影响的装置和方法。

9. 发明申请

WO2012078460A1 PILOT-ASSISTED DATA TRANSMISSION IN A COHERENT OPTICAL-COMMUNICATION SYSTEM 审中-公开
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：WO2012078460A1
公开(公告)日：2012-06-14
申请号：PCT/US2011/063004
申请日：2011-12-02
申请人： ALCATEL LUCENT , LIU, Xiang , SETHUMADHAVAN, Chandrasekhar
发明人： LIU, Xiang , SETHUMADHAVAN, Chandrasekhar
IPC分类号： H04B10/155 , H04J14/02 , H04L27/26
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 - 补偿过程以相对较低的频率位错误率，这些信号中编码的数据。

10. 发明申请

WO2012078445A1 COHERENT OPTICAL RECEIVER FOR PILOT-ASSISTED DATA TRANSMISSION 审中-公开
标题翻译：用于辅助数据传输的相关光接收机
公开(公告)号：WO2012078445A1
公开(公告)日：2012-06-14
申请号：PCT/US2011/062850
申请日：2011-12-01
申请人： ALCATEL LUCENT , LIU, Xiang , SETHUMADHAVAN, Chandrasekhar
发明人： LIU, Xiang , SETHUMADHAVAN, Chandrasekhar
IPC分类号： H04J14/06 , H04L27/26
CPC分类号： H04B10/61 , H04J14/06 , H04L27/2605 , H04L27/265 , H04L27/2697
摘要： A coherent optical receiver for a data-frame format in which a data frame has two or more pilot-symbol blocks, each having a cyclic prefix or suffix, and one or more payload-symbol blocks, each of which is concatenated with at least one adjacent block without a guard interval between them. The receiver uses optical signals corresponding to the pilot-symbol blocks to perform data-frame synchronization, frequency-offset correction, and channel-estimation procedures, which are robust even in the presence of certain transmission impairments. The receiver applies block-overlap processing with a sliding window to recover the payload data in a manner that substantially cancels the adverse effects of inter-block interference caused by the absence of guard intervals in the payload portion of the data frame. In one embodiment, the receiver performs channel-estimation and block-overlap processing for polarization-division-multiplexed signals in a manner that enables a combined, intertwined application of channel-response-compensation and polarization-demultiplexing procedures.
摘要翻译：一种用于数据帧格式的相干光接收机，其中数据帧具有两个或多个导频符号块，每个具有循环前缀或后缀，以及一个或多个有效载荷符号块，每个有效载荷符号块至少与一个相邻块之间没有保护间隔。接收机使用与导频符号块相对应的光信号来执行数据帧同步，频偏校正和信道估计过程，即使存在某些传输损伤也是鲁棒的。接收机采用具有滑动窗口的块重叠处理来以基本上消除由于在数据帧的有效载荷部分中不存在保护间隔而引起的块间干扰的不利影响的方式来恢复有效载荷数据。在一个实施例中，接收机以使得能够组合，交织在一起的信道响应补偿和偏振解复用过程的应用的方式来执行偏振分复用信号的信道估计和块重叠处理。

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