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1. 发明申请

US20180062759A1 METHODS FOR COMPENSATION OF CROSS-POLARIZATION MODULATION (XPOLM) IMPAIRMENTS IN COHERENT OPTICAL COMMUNICATIONS 审中-公开
公开(公告)号：US20180062759A1
公开(公告)日：2018-03-01
申请号：US15244071
申请日：2016-08-23
申请人： Mitsubishi Electric Research Laboratories, Inc.
发明人： Milutin Pajovic , Kieran Parsons , David Millar , Toshiaki Koike-Akino , Keisuke Kojima
IPC分类号： H04B10/61 , H04B3/32 , H04B10/079
CPC分类号： H04B10/6162 , H04B3/32 , H04B10/0795 , H04B10/2572 , H04B10/614 , H04B10/6166 , H04B2210/006
摘要： Methods and systems for decoding symbols transmitted over an optical channel having a cross-polarization modulation (XPolM) impairment, wherein an optical signal is polarized to encode the symbols on an x-polarization and an y-polarization before transmitted. The method including receiving the optical signal transmitted over the optical channel. Sampling the optical signal to produce a sequence of digital samples, wherein each digital sample includes a measurement of each polarization of the optical signal at an instance of time. Selecting a subset of the sequence of digital samples that includes a digital sample and neighboring digital samples on the sequence. Repeating the selecting and the determining for each digital sample remaining in the sequence of digital samples to produce a sequence of cross-talk coefficients; and decoding some of the symbols from the sequence of digital samples using cross-talk models with corresponding cross-talk coefficients, wherein method steps are performed using a processor.

2. 发明授权

US09866928B2 Intra-transceiver optical superchannel switching via RF sub-band multiplexing technique 有权
公开(公告)号：US09866928B2
公开(公告)日：2018-01-09
申请号：US14934078
申请日：2015-11-05
申请人： NEC Laboratories America, Inc.
发明人： Yue-Kai Huang , Shaoliang Zhang , Fatih Yaman , Ting Wang
IPC分类号： H04B10/61 , H04B10/516 , H04Q11/00 , H04J14/02
CPC分类号： H04Q11/0001 , H04B10/516 , H04B10/613 , H04B10/616 , H04B10/6166 , H04J14/0298
摘要： Systems and methods are disclosed for data communication by performing RF sub-band multiplexing and demultiplexing by cascading a radio-frequency (RF) mixing module and optical dual-polarized (DP) QPSK modulator forhybrid RF/optical IQ modulation; and performing intra-transceiver optical superchannel switching through the RF sub-band multiplexing.

3. 发明授权

US09722697B2 Polarization division multiplexing optical communication reception device, polarization division multiplexing optical communication system, and polarization division multiplexing optical communication method 有权
公开(公告)号：US09722697B2
公开(公告)日：2017-08-01
申请号：US14761371
申请日：2014-01-17
申请人： NEC Corporation
发明人： Daisaku Ogasahara
IPC分类号： H04B10/079 , H04B10/60 , H04J14/06 , H04B10/61
CPC分类号： H04B10/07953 , H04B10/60 , H04B10/614 , H04B10/6166 , H04J14/06
摘要： A polarization demultiplexing optical communication receiver is provided with a signal quality change imparting means which imparts a signal quality change to multiplexed two optical signals; and a signal quality monitoring means which compares signal qualities of the two optical signals with each other after the multiplexed two optical signals imparted with the signal quality change are subjected to polarization separation so as to specify the two optical signals based on a result of the comparison. This makes it possible to reduce transmission characteristics degradation of a polarization-multiplexed optical signal, and to implement transmission having high reliability.

4. 发明授权

US09692548B2 Techniques for blind equalization of high-order quadrature amplitude modulation signals 有权
公开(公告)号：US09692548B2
公开(公告)日：2017-06-27
申请号：US14661850
申请日：2015-03-18
申请人： ZTE Corporation
发明人： Zhensheng Jia , Hung-Chang Chien , Jianjun Yu
IPC分类号： H04J14/06 , H04L1/00 , H04B10/61
CPC分类号： H04J14/06 , H04B10/612 , H04B10/613 , H04B10/6165 , H04B10/6166 , H04L1/0036 , H04L1/0054
摘要： A blind equalization technique of high-order QAM signals is provided. A method implemented at a receiver-side in an optical communication network receives an optical signal and performs a two-step polarization tracking process on the received optical signal. Using another method, a polarization multiplexed optical transmission is received by a receiver and a polarization tracking process is performed by applying two different algorithms in parallel. One algorithm may be a decision directed least means square (DD-LMS) algorithm. Another algorithm may be a constant modulus algorithm (CMA).

5. 发明授权

US09544064B2 Electro-optical implementation of an optical spectrum inverter 有权
标题翻译：光学光学实现光谱逆变器
公开(公告)号：US09544064B2
公开(公告)日：2017-01-10
申请号：US14415028
申请日：2012-07-19
申请人： Bengt-Erik Olsson , Christina Larsson
发明人： Bengt-Erik Olsson , Christina Larsson
IPC分类号： H04B10/00 , H04B10/61 , H04B10/2531 , H04B10/255 , H04B10/2557 , H04J14/02 , H04J14/06 , H04L5/14 , H04B10/64
CPC分类号： H04B10/6166 , H04B10/2531 , H04B10/255 , H04B10/2557 , H04B10/6163 , H04B10/64 , H04J14/0202 , H04J14/06 , H04L5/14
摘要： The invention relates to an optical spectrum inverter, configured for counteracting phase distortion effects in an optical channel over a predefined frequency range, to an inverter node, configured for duplex operation in at least two wavelength channels, and to a method for counteracting phase distortion effects in an optical channel. The optical spectrum inverter comprises an optical receiver comprising a polarization diversity unit configured for polarization resolved detection, wherein the optical receiver is configured for receiving an optical input signal comprising a first wavelength span and for converting the optical input signal to an electrical signal, and an optical modulator connectable to the optical receiver and configured for modulating the electrical signal onto an optical signal, wherein the optical modulator comprises an optical filter which is configured for selecting a second wavelength span of the optical signal corresponding to an optical output side band of an inverted spectrum of the optical channel such that phase distortion effects are counteracted at least partly over the predefined frequency range. In this way, an optical spectrum inverter is provided which is simple and cost-effective to realize and allows higher optical power levels in conjunction with a higher capacity per optical channel and is also adapted for longer transmission distances.
摘要翻译：本发明涉及一种被配置为将预定频率范围内的光信道中的相位失真效应抵消到被配置为在至少两个波长信道中进行双工操作的逆变器节点的光谱逆变器以及用于抵消相位失真效应的方法在光通道中。所述光学频谱逆变器包括光接收器，该光接收器包括被配置用于偏振分辨检测的偏振分集单元，其中所述光接收器被配置为接收包括第一波长跨度的光输入信号并将所述光输入信号转换成电信号，光调制器，其可连接到光接收器并且被配置用于将电信号调制到光信号上，其中所述光调制器包括滤光器，所述滤光器被配置为选择对应于反转的光输出侧带的所述光信号的第二波长跨度光通道的频谱，使得相位失真效应至少部分地超过预定义的频率范围。以这种方式，提供了一种光谱逆变器，其实现并且允许更高的光功率水平与每个光通道的更高容量相结合，并且还适合于更长的传输距离。

6. 发明授权

US09281915B2 Optical polarization demultiplexing for a coherent-detection scheme 有权
标题翻译：用于相干检测方案的光偏振解复用
公开(公告)号：US09281915B2
公开(公告)日：2016-03-08
申请号：US13743677
申请日：2013-01-17
申请人： Noriaki Kaneda
发明人： Noriaki Kaneda
IPC分类号： H04J14/06 , H04B10/61
CPC分类号： H04J14/06 , H04B10/614 , H04B10/6166
摘要： An optical receiver having a plurality of optical IQ modulators arranged in a butterfly configuration and configured to operate as an optical polarization de-multiplexer. The optical receiver further has (i) an opto-electric circuit configured to apply optical homodyne detection to an optical input signal received by the optical receiver and (ii) a controller configured to generate one or more control signals for driving the IQ modulators of the plurality based on one or more electrical feedback signals received from the opto-electric circuit.
摘要翻译：一种具有多个光学IQ调制器的光接收器，其以蝶形配置布置并被配置为作为光偏振解复用器工作。光接收器还具有（i）光电回路，被配置为将光学零差检测应用于由光接收器接收的光输入信号，以及（ii）控制器，被配置为产生一个或多个控制信号以驱动IQ调制器基于从光电路接收的一个或多个电反馈信号来进行多个。

7. 发明授权

US09246600B2 Signal processing circuit, signal processing method, optical receiver and optical communication system 有权
标题翻译：信号处理电路，信号处理方法，光接收机和光通信系统
公开(公告)号：US09246600B2
公开(公告)日：2016-01-26
申请号：US14193020
申请日：2014-02-28
申请人： Daisaku Ogasahara
发明人： Daisaku Ogasahara
IPC分类号： H04B10/61 , H04J14/06
CPC分类号： H04B10/6162 , H04B10/614 , H04B10/6164 , H04B10/6165 , H04B10/6166 , H04J14/06
摘要： In order to reduce influence of noise due to a phase deviation, and to estimate an amount of phase compensation with superior accuracy in a polarization multiplexing/demultiplexing optical communication system, a signal processing circuit includes: optical frequency deviation estimating unit for estimating a frequency deviation which is a difference between a frequency of local light and a frequency of the optical carrier wave which is included in a signal data which corresponds to the polarizations and are generated by mixing a plurality of the optical carrier waves with the local light, which optical carrier wave is phase-modulated and have polarizations able to be demultiplexed and for outputting the estimated frequency deviation as an estimated value; for outputting the estimated frequency deviation as an estimated value; optical frequency deviation compensation amount analyzing unit for calculating an amount of frequency compensation which is an amount of compensation to make a phase of the signal data rotated so as to reduce the frequency deviation, on the basis of a plurality of the estimated values estimated per the signal data; optical frequency deviation compensating unit for making the phase of the signal data rotated correspondingly to the amount of the frequency compensation; optical phase deviation estimating unit for estimating a phase deviation included in each of input signal data and is a difference between a phase of the optical carrier wave and a phase of the local light; and optical phase deviation compensating unit for making the phase of the signal data rotated correspondingly to the phase deviation.
摘要翻译：为了减少由于相位偏差引起的噪声的影响，并且为了在极化复用/解复用光通信系统中以高精度估计相位补偿量，信号处理电路包括：用于估计频偏的光频偏差估计单元其是局部光的频率和包括在与偏振相对应并且通过将多个光载波与本地光混合而产生的信号数据中的光载波的频率之间的差异，该光载波波被相位调制，并且具有能够解复用的偏振和用于将估计的频率偏差输出作为估计值; 用于输出所估计的频率偏差作为估计值; 光频偏移补偿量分析单元，用于计算作为使信号数据的相位旋转以减少频率偏差的补偿量的频率补偿量，所述补偿量基于每个所估计的多个估计值信号数据; 光频偏移补偿单元，用于使信号数据相位相应于频率补偿量; 光学相位偏差估计单元，用于估计每个输入信号数据中包括的相位偏差，并且是光载波的相位和局部光的相位之间的差; 以及用于使信号数据的相位相应于相位偏差旋转的光学相位偏移补偿单元。

8. 发明申请

US20150358078A1 POLARIZATION DIVISION MULTIPLEXING OPTICAL COMMUNICATION RECEPTION DEVICE, POLARIZATION DIVISION MULTIPLEXING OPTICAL COMMUNICATION SYSTEM, AND POLARIZATION DIVISION MULTIPLEXING OPTICAL COMMUNICATION METHOD 有权
标题翻译：极化多路复用光通信接收设备，极化多路复用光通信系统和极化多路复用光通信方法
公开(公告)号：US20150358078A1
公开(公告)日：2015-12-10
申请号：US14761371
申请日：2014-01-17
申请人： NEC CORPORATION
发明人： DAISAKU OGASAHARA
IPC分类号： H04B10/079 , H04B10/60 , H04J14/06
CPC分类号： H04B10/07953 , H04B10/60 , H04B10/614 , H04B10/6166 , H04J14/06
摘要： A polarization demultiplexing optical communication receiver is provided with a signal quality change imparting means which imparts a signal quality change to multiplexed two optical signals; and a signal quality monitoring means which compares signal qualities of the two optical signals with each other after the multiplexed two optical signals imparted with the signal quality change are subjected to polarization separation so as to specify the two optical signals based on a result of the comparison. This makes it possible to reduce transmission characteristics degradation of a polarization-multiplexed optical signal, and to implement transmission having high reliability.
摘要翻译：偏振解复用光通信接收机设置有信号质量改变赋予装置，其对多路复用的两个光信号赋予信号质量改变; 以及信号质量监视装置，其在赋予信号质量变化的多路复用的两个光信号经过偏振分离之后对两个光信号的信号质量进行比较，以便基于比较结果来指定两个光信号。这使得可以降低偏振复用光信号的传输特性劣化，并实现高可靠性的传输。

9. 发明授权

US09100125B2 Frame formatting for high rate optical communications 有权
标题翻译：高速光通信的帧格式
公开(公告)号：US09100125B2
公开(公告)日：2015-08-04
申请号：US14028157
申请日：2013-09-16
申请人： ViaSat, Inc.
发明人： Fan Mo , Sameep Dave
IPC分类号： H04B10/00 , H04B10/06 , H04B10/50 , H04B10/516 , H04B10/077 , H04B10/61 , H04B10/69 , H04L27/20 , H04L27/22
CPC分类号： H04B10/505 , H04B10/077 , H04B10/516 , H04B10/6166 , H04B10/6971 , H04L27/2096 , H04L27/22
摘要： Methods, systems, and devices are described for formatting of data streams to be transmitted over fiber optic channels, and for processing received optical signals. A data transmission device may include a digital coding and modulation module that encodes a digital data stream, inserts unique words into the digital data stream, and modulates the encoded data stream and unique words onto optical channels for transmission over an optical fiber. A demodulation and decoding device may include a unique word identification module that identifies the unique words inserted in each optical channel stream, determines one or more characteristics of the plurality of optical channels based on the unique words, and provides the one or more characteristics to one or more other modules in the demodulator and decoding device.
摘要翻译：描述了通过光纤通道传输的数据流的格式化以及处理所接收的光信号的方法，系统和设备。数据传输设备可以包括对数字数据流进行编码的数字编码和调制模块，将唯一字插入到数字数据流中，并且将经编码的数据流和唯一字调制到光信道上以在光纤上传输。解调和解码设备可以包括识别在每个光信道流中插入的唯一字的唯一字识别模块，基于唯一字确定多个光信道的一个或多个特性，并将一个或多个特性提供给一个或更多其他模块在解调器和解码设备。

10. 发明授权

US09025963B2 Processing data in a coherent optical communication system 有权
标题翻译：在相干光通信系统中处理数据
公开(公告)号：US09025963B2
公开(公告)日：2015-05-05
申请号：US13434213
申请日：2012-03-29
申请人： Christian Malouin , Theodore John Schmidt , Bo Zhang , Elias Simpson , Roberto Marcoccia
发明人： Christian Malouin , Theodore John Schmidt , Bo Zhang , Elias Simpson , Roberto Marcoccia
IPC分类号： H04B10/61
CPC分类号： H04B10/6161 , H04B10/40 , H04B10/616 , H04B10/6166 , H04J14/06 , H04L7/0075 , H04L27/2273
摘要： This disclosure describes techniques to sample electrical data streams in coherent receivers. For instance, an analog-to-digital converter (ADC) samples the received electrical data stream at a sampling rate that is nominally twice or greater than twice the symbol rate of the electrical data stream that the ADC receives. A digital filter receives the digital data stream from the ADC, and digitally filters the digital data streams to output a filtered digital electrical data stream at an effective sampling rate that is less than the sampling rate and less than twice the symbol rate, and greater than or equal to the symbol rate.
摘要翻译：本公开描述了在相干接收机中采样电数据流的技术。例如，模数转换器（ADC）以标称值为ADC接收的电数据流的符号速率的两倍或更大的采样速率对接收的电数据流进行采样。数字滤波器从ADC接收数字数据流，并对数字数据流进行数字滤波，以低于采样速率且小于符号速率的两倍的有效采样速率输出滤波后的数字电子数据流，并且大于或等于符号率。

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