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1. 发明公开

EP2201706A1 RECONSTRUCTION OF TWO POLARIZATION COMPONENTS OF AN OPTICAL SIGNAL FIELD 有权
标题翻译：光信号场中两个极化分量的重构
公开(公告)号：EP2201706A1
公开(公告)日：2010-06-30
申请号：EP08830507.3
申请日：2008-09-02
申请人： LUCENT TECHNOLOGIES INC.
发明人： LIU, Xiang
IPC分类号： H04B10/18 , H04B10/158
CPC分类号： H04B10/60 , H04B10/2513 , H04B10/67 , H04B10/677 , H04B10/69
摘要： A digital version of both amplitude and phase of at least one generic polarization component of a received optical signal is developed using dual-polarization direct differential detection with digital signal processing. The received signal is split into orthogonal polarization components, each of which is split into three copies. For each orthogonal polarization component a) an intensity profile is conventionally obtained using a copy and b) phase information is obtained by supplying each remaining copy to a respective one of a pair of optical delay interferometers having orthogonal phase offsets, followed by respective balanced intensity detectors. The outputs the balanced intensity detectors and the intensity profiles are converted into digital representations and used to develop, via signal processing, the optical field information of at least one generic polarization component of the received optical signal. Compensation of impairments, such as PMD, is realized through further processing.
摘要翻译：接收到的光信号的至少一个通用偏振分量的幅度和相位的数字版本使用数字信号处理的双偏振直接差分检测来形成。接收到的信号被分成正交偏振分量，每个正交偏振分量被分成三份。对于每个正交偏振分量a），通常使用副本获得强度分布，并且b）通过将每个剩余副本提供给具有正交相位偏移的一对光学延迟干涉仪中的相应一个，随后分别获得平衡强度检测器。平衡强度检测器和强度分布的输出被转换成数字表示，并被用于通过信号处理产生接收到的光信号的至少一个普通偏振分量的光场信息。通过进一步处理实现PMD等损伤补偿。

2. 发明公开

EP2047615A2 METHOD AND APPARATUS FOR THE GENERATION AND DETECTION OF OPTICAL DIFFERENTIAL VARIED-MULTILEVEL PHASE-SHIFT KEYING WITH PULSE AMPLITUDE MODULATION (ODVMPSK/PAM) SIGNALS 有权
标题翻译：方法和设备生成和光个别多级相位调制脉冲宽度调制信号的检测
公开(公告)号：EP2047615A2
公开(公告)日：2009-04-15
申请号：EP07796793.3
申请日：2007-07-12
申请人： LUCENT TECHNOLOGIES INC.
发明人： GILES, Randy, Clinton , LIU, Xiang
IPC分类号： H04B10/155 , H04L27/32
CPC分类号： H04L27/38 , H04B10/541 , H04B10/5561 , H04L25/4917 , H04L27/2096 , H04L27/34 , H04L27/362
摘要： Methods and apparatus are described for generating and receiving amplitude and differential-phase encoded signals in which the number of phase states at a given amplitude level is always less than or equal to that at a higher amplitude level and at least two amplitude levels have different numbers of phase states.

3. 发明公开

EP2070224A1 RECONSTRUCTION AND RESTORATION OF AN OPTICAL SIGNAL FIELD 有权
标题翻译：重建和恢复的光信号场
公开(公告)号：EP2070224A1
公开(公告)日：2009-06-17
申请号：EP07838555.6
申请日：2007-09-20
申请人： LUCENT TECHNOLOGIES INC.
发明人： LIU, Xiang , WEI, Xing
IPC分类号： H04B10/158
CPC分类号： H04B10/60 , H04B10/5161 , H04B10/677
摘要： A digital version of both amplitude and phase of a received optical signal is developed by employing direct differential detection in conjunction with digital signal processing. The signal is split into three copies. An intensity profile is conventionally obtained using one of the copies. Phase information is obtained by supplying each remaining copy to a respective one of a pair of optical delay interferometers that have orthogonal phase offsets, followed by respective balanced intensity detectors. The output of each of the balanced intensity detectors, and the intensity profile, are each converted to respective digital representations. Signal processing is used to develop the phase information from the digital representations of the output of the balanced intensity detector outputs.

4. 发明公开

EP2186239A2 RATE-ADAPTIVE FORWARD ERROR CORRECTION FOR OPTICAL TRANSPORT SYSTEMS 有权转让
标题翻译：具有自适应码率光传输系统前向纠错
公开(公告)号：EP2186239A2
公开(公告)日：2010-05-19
申请号：EP08794805.5
申请日：2008-07-28
申请人： LUCENT TECHNOLOGIES INC.
发明人： DE LIND VAN WIJNGAARDEN, Adriaan, J. , GILES, Randy, Clinton , KOROTKY, Steven, K. , LIU, Xiang
IPC分类号： H04L1/00 , H04B10/00
CPC分类号： H04L1/0009 , H04L1/0015
摘要： An optical transport system (OTS) having a plurality of optical transponders (OTs) connected via one or more optical links and adapted to communicate with one another using respective rate-adaptive forward-error-correction (FEC) codes. In one embodiment, the OTS has a rate control unit (RCU) adapted to configure the OTs to dynamically adjust the rates of the FEC codes (310) based on an estimated performance margin (306) for each link between two respective communicating OTs to optimize the overall capacity of the OTS while maintaining an adequate, but not excessive, overall system margin.

5. 发明公开

EP1949630A1 DIGITAL APPARATUS FOR SOFT DETECTION OF MULTI-CHIP DBPSK SIGNALS 审中-公开
标题翻译：数字设备中的软解码MULTI-CHIP DBPSK SIGNALS
公开(公告)号：EP1949630A1
公开(公告)日：2008-07-30
申请号：EP06827539.5
申请日：2006-11-03
申请人： Lucent Technologies Inc.
发明人： LIU, Xiang
IPC分类号： H04L27/22 , H04L25/06
CPC分类号： H04L27/223 , H04B10/695 , H04L25/067
摘要： A system for implementing the soft decision of a 3-chip differential binary phase shift keying (DBPSK) optical signal using digital components. Pair-wise comparisons of three differentially detected signals are performed and analyzed by digital logic which determines the most likely sequence of data. In a first variant, pairs of adjacent data bits are detected simultaneously, whereas in a second variant, data bits are detected individually. The digital logic can be implemented using conventional logic gates.

6. 发明授权

EP2047615B1 METHOD AND APPARATUS FOR THE GENERATION AND DETECTION OF OPTICAL DIFFERENTIAL VARIED-MULTILEVEL PHASE-SHIFT KEYING WITH PULSE AMPLITUDE MODULATION (ODVMPSK/PAM) SIGNALS 有权
标题翻译：方法和设备生成和光个别多级相位调制脉冲宽度调制信号的检测
公开(公告)号：EP2047615B1
公开(公告)日：2010-04-21
申请号：EP07796793.3
申请日：2007-07-12
申请人： LUCENT TECHNOLOGIES INC.
发明人： GILES, Randy, Clinton , LIU, Xiang
IPC分类号： H04B10/155 , H04L27/32
CPC分类号： H04L27/38 , H04B10/541 , H04B10/5561 , H04L25/4917 , H04L27/2096 , H04L27/34 , H04L27/362
摘要： Methods and apparatus are described for generating and receiving amplitude and differential-phase encoded signals in which the number of phase states at a given amplitude level is always less than or equal to that at a higher amplitude level and at least two amplitude levels have different numbers of phase states.

7. 发明公开

EP1932261A1 OPTICAL DEMODULATING APPARATUS AND METHOD 有权
标题翻译： DEVICE AND METHOD FOR光解调
公开(公告)号：EP1932261A1
公开(公告)日：2008-06-18
申请号：EP06816417.7
申请日：2006-10-05
申请人： Lucent Technologies Inc.
发明人： LIU, Xiang
IPC分类号： H04B10/158
CPC分类号： H04B10/66
摘要： An optical demodulator and accompanying method(s) that demodulates a DQPSK signal employing a single optical delay interferometer comprising a free-space Michelson interferometer having two optical paths, connected to a 1x2 coupler. Positioned within an arm of the Michelson interferometer is a phase shifter that produces a phase difference of τr/2 between the two paths. The resulting demodulator is compact, reliable, and may be constructed to be substantially immune from undesirable thermal sensitivities.

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