公开(公告)号：US08655194B2

公开(公告)日：2014-02-18

申请号：US13566229

申请日：2012-08-03

申请人： Xiang Zhou

发明人： Xiang Zhou

IPC分类号： H04B10/06 ,  H04B10/12

CPC分类号： H04B10/6971 ,  H04B10/2513 ,  H04B10/25133 ,  H04B10/61 ,  H04B10/611 ,  H04B10/614 ,  H04B10/6161 ,  H04B10/6162 ,  H04B2210/252

摘要： A method and system for mitigating distortion in coherent single-ended photo-detection is disclosed. The methodology comprises: receiving an optical signal carried on an optical transmission medium and coherently detecting the received optical signal to produce a digitized signal; estimating a time-dependent random variable introducing distortion to the coherently detected signal; and subtracting the distortion from digitized signal to produce a distortion mitigated output signal.

摘要翻译： 公开了一种减轻相干单端光检测失真的方法和系统。 该方法包括：接收在光传输介质上承载的光信号，并相干地检测接收到的光信号以产生数字化信号; 估计对相干检测信号引入失真的时间依赖随机变量; 并从数字化信号中减去失真以产生失真缓解输出信号。

公开(公告)号：US20140016929A1

公开(公告)日：2014-01-16

申请号：US13981298

申请日：2012-01-24

申请人： Etsushi Yamazaki ,  Takayuki Kobayashi ,  Masahito Tomizawa ,  Riichi Kudo ,  Koichi Ishihara ,  Tadao Nakagawa ,  Mitsuteru Ishikawa

发明人： Etsushi Yamazaki ,  Takayuki Kobayashi ,  Masahito Tomizawa ,  Riichi Kudo ,  Koichi Ishihara ,  Tadao Nakagawa ,  Mitsuteru Ishikawa

IPC分类号： H04B10/079

CPC分类号： H04B10/07951 ,  H04B10/2513

摘要： A wavelength dispersion amount estimation method, a wavelength dispersion compensation circuit, and a receiving device which rapidly estimate and set a wavelength dispersion amount to compensate with high accuracy at the receiving device which compensates waveform distortion at an optical fiber transmission path. A wavelength dispersion compensation circuit includes an analog-digital converter which converts an optical analog waveform received from the optical fiber transmission path to a digital signal, a digital signal processor which compensates waveform distortion of the digital signal output from the analog-digital converter due to wavelength dispersion at the optical fiber transmission path with a dispersion compensation amount estimated with the wavelength dispersion amount estimation method, and a symbol clock extractor which extracts a symbol arrival timing clock of received data contained in the digital signal output from the analog-digital converter and outputs strength of the symbol arrival timing clock as the clock detection value.

摘要翻译： 波长色散量估计方法，波长色散补偿电路和接收装置，其快速估计和设置在补偿光纤传输路径上的波形失真的接收装置处以高精度补偿的波长色散量。 波长色散补偿电路包括将从光纤传输路径接收的光模拟波形转换为数字信号的模拟数字转换器，用于补偿由于模拟数字转换器输出的数字信号的波形失真，数字信号处理器由于 在具有由波长色散量估计方法估计的色散补偿量的光纤传输路径处的波长色散，以及符号时钟提取器，其提取包含在从模数转换器输出的数字信号中的接收数据的符号到达定时时钟，以及 输出符号到达定时时钟的强度作为时钟检测值。

公开(公告)号：US08565596B2

公开(公告)日：2013-10-22

申请号：US13032698

申请日：2011-02-23

申请人： Kazuyuki Tajima ,  Tomohiro Hashiguchi ,  Yutaka Takita

发明人： Kazuyuki Tajima ,  Tomohiro Hashiguchi ,  Yutaka Takita

IPC分类号： H04B10/2513

CPC分类号： H04B10/2513 ,  H04J14/0268 ,  H04J14/0269 ,  H04J14/0271

摘要： In an apparatus for supporting designing of an optical network including a plurality of nodes and links which connect the plurality of nodes: a storage stores information indicating distances of the links and information indicating amounts of chromatic dispersion in the links; and a path selection unit selects a path for use in transmission of an optical signal, from among a plurality of paths each extending from a start node to a destination node, by reference to the storage. The path selection unit selects the path for use in transmission on the basis of deviations of amounts of chromatic dispersion accumulated by transmission to respective nodes on each of the plurality of paths, from reference amounts at the respective nodes, and the reference amounts at the respective nodes on each of the plurality of paths are determined according to distances from the start node to the respective nodes.

摘要翻译： 在用于支持包括连接多个节点的多个节点和链路的光网络的设计的装置中：存储器存储指示链路的距离的信息和指示链路中的色散量的信息; 并且路径选择单元通过参考存储器从从开始节点到目的地节点延伸的多个路径中选择用于光信号的传输的路径。 路径选择单元根据从多个路径中的每一个路径上的各个节点的传输累积的色散量的偏差，从各个节点的参考量和各个节点的参考量，选择用于发送的路径。 根据从起始节点到相应节点的距离来确定多个路径中的每一个上的节点。

公开(公告)号：US08543012B2

公开(公告)日：2013-09-24

申请号：US12780283

申请日：2010-05-14

申请人： Tiejun J. Xia ,  Glenn A. Wellbrock

发明人： Tiejun J. Xia ,  Glenn A. Wellbrock

IPC分类号： H04B10/06 ,  H04B10/08 ,  H04B10/12 ,  H04B10/00

CPC分类号： H04B10/2513

摘要： A device may include a group delay monitor and a signal receiver. The group delay monitor may be configured to obtain group delay data corresponding to group delay of an optical signal and provide the group delay data to a signal receiver. The signal receiver configured to obtain a time-domain digital signal corresponding to the optical signal, convert the time-domain digital signal into a frequency-domain signal, apply a digital filter constructed based on the group delay data to the frequency-domain signal to obtain an output signal, and transmit the output signal.

摘要翻译： 设备可以包括组延迟监视器和信号接收器。 组延迟监视器可以被配置为获得对应于光信号的组延迟的组延迟数据，并将组延迟数据提供给信号接收器。 所述信号接收器被配置为获得与所述光信号对应的时域数字信号，将所述时域数字信号转换为频域信号，将基于所述群延迟数据构成的数字滤波器应用于所述频域信号 获得输出信号，并传输输出信号。

公开(公告)号：US08538272B1

公开(公告)日：2013-09-17

申请号：US10829545

申请日：2004-04-22

申请人： Alan Robinson ,  Adrian Sparks ,  Robin Rickard

发明人： Alan Robinson ,  Adrian Sparks ,  Robin Rickard

IPC分类号： H04B10/00 ,  H04B10/04

CPC分类号： H04B10/2513 ,  H04B10/2543 ,  H04B2210/252 ,  H04B2210/254

摘要： A method of encrypting an optical communications signal involves determining an encryption function, filtering an electrical input signal using the encryption function to generate an encrypted electrical signal, and modulating an optical source using the encrypted electrical signal to generate a corresponding encrypted optical signal. This is then transmitted through an optical communications system. The encryption is selected such as to substantially remove symbol definition from the optical signal. This method provides digital signal processing of an electrical input signal in order to derive a signal for controlling an optical modulator in such a way that the optical signal transmitted over the link is a continuous analogue signal rather than a series of discrete symbols which alternate between well-defined signal values. This makes it difficult for a third party to derive the binary bit sequence encoded by the optical signal.

摘要翻译： 一种加密光通信信号的方法涉及确定加密功能，使用加密功能对电输入信号进行滤波以产生加密的电信号，以及使用加密的电信号调制光源以产生相应的加密光信号。 然后通过光通信系统传输。 选择加密，以便基本上从光信号中去除符号定义。 该方法提供电输入信号的数字信号处理，以便导出用于控制光调制器的信号，使得通过链路传输的光信号是连续的模拟信号，而不是在井之间交替的一系列离散符号 定义的信号值。 这使得第三方难以导出由光信号编码的二进制位序列。

公开(公告)号：US08467688B2

公开(公告)日：2013-06-18

申请号：US11855514

申请日：2007-09-14

申请人： Jean-Luc Archambault ,  Steven Arvo Surek ,  Martin Nuss

发明人： Jean-Luc Archambault ,  Steven Arvo Surek ,  Martin Nuss

IPC分类号： H04B10/12 ,  H04B10/2513

CPC分类号： H04B10/25133 ,  H04B10/2513 ,  H04J3/0682 ,  H04J3/0685 ,  H04J14/02

摘要： Systems and methods for extended reach low differential latency optical networking with optical amplifiers and dispersion compensation modules configured to minimize latency between transmit and receive paths are provided. Additionally, systems and methods are provided for incorporating absolute time references wherein the relative accuracy of clock time between various servers used in various multi-site enterprises is required. The transport systems and methods are used in conjunction with low differential latency systems. The transport systems and methods provide that the differential latency between transmit and receive directions is maintained within about +/−5 microseconds of the transmit/receive path differential delay requirement in order to perform within the overall parameters of the low differential latency system architecture.

摘要翻译： 提供了用于延长达到的低差分延迟光网络的系统和方法，其中光学放大器和色散补偿模块被配置为最小化发射和接收路径之间的等待时间。 此外，提供了用于引入绝对时间参考的系统和方法，其中需要在各种多站点企业中使用的各种服务器之间的时钟时间的相对精度。 传输系统和方法与低差分延迟系统结合使用。 传输系统和方法提供发送和接收方向之间的差分等待时间保持在发射/接收路径差分延迟要求的大约+/- 5微秒内，以便在低差分延迟系统架构的总体参数内执行。

公开(公告)号：US08380069B2

公开(公告)日：2013-02-19

申请号：US12909721

申请日：2010-10-21

申请人： Wayne S. Pelouch ,  Do-Il Chang

发明人： Wayne S. Pelouch ,  Do-Il Chang

IPC分类号： H04J14/02

CPC分类号： H04B10/2513 ,  H04B10/61 ,  H04B10/66

摘要： The mixing of coherent optical wavelength channels with non-coherent optical wavelength channels. Before mixing, a dispersive element introduces dispersion into the coherent optical wavelength channels and/or into the non-coherent optical wavelength channels such that the dispersion map of the coherent optical wavelength channels is different than the dispersion map of the non-coherent optical wavelength channels. By allowing the coherent channels to have a different dispersion map, the dispersion map may be moved further from the zero dispersion point, which can degrade coherent detection. Accordingly, coherent optical channels and non-coherent optical channels may be transmitted effectively over the same optical link.

摘要翻译： 相干光波长通道与非相干光波长通道的混合。 在混合之前，色散元件将相干光波长通道中的色散和/或非相干光波长通道引入色散，使得相干光波长通道的色散图与非相干光波长通道的色散图不同 。 通过允许相干通道具有不同的色散图，色散图可以从零色散点进一步移动，这可以降低相干检测。 因此，相干光信道和非相干光信道可以在相同的光链路上有效传输。

公开(公告)号：US08380068B2

公开(公告)日：2013-02-19

申请号：US12895585

申请日：2010-09-30

申请人： Do-Il Chang ,  Wayne S. Pelouch

发明人： Do-Il Chang ,  Wayne S. Pelouch

IPC分类号： H04J14/02 ,  H04B10/12

CPC分类号： H04B10/2513 ,  H04B10/61 ,  H04B10/66

摘要： An optical assembly in an optical link coupling two optical terminals. The optical assembly receives and demultiplexes two groups of optical wavelength channels which are each treated separately as far as dispersion compensation and discrete amplification are concerned. The optical assembly then multiplexes the two groups back into the same fiber for further transmission. For instance, one group of optical wavelength channels may each be coherent channels, and subject to no dispersion in the optical assembly, while the other group may contain non-coherent channels, which are subject to dispersion compensation in the optical assembly.

摘要翻译： 耦合两个光学终端的光学链路中的光学组件。 光学组件接收和解复用两组光波长通道，每组光波长通道分别对分散补偿和离散放大进行处理。 光学组件然后将两组复用回相同的光纤进行进一步传输。 例如，一组光波长通道可以各自是相干通道，并且不会在光学组件中产生色散，而另一组光束可能包含在光学组件中进行色散补偿的非相干通道。

公开(公告)号：US20120263463A1

公开(公告)日：2012-10-18

申请号：US13429767

申请日：2012-03-26

申请人： Takashi TOYOMAKI

发明人： Takashi TOYOMAKI

IPC分类号： H04B10/04 ,  H04J14/02

CPC分类号： H04J14/0212 ,  H04B10/0775 ,  H04B10/2513 ,  H04J14/0284

摘要： An optical transmission device includes a signal generator configured to generate a first signal corresponding to an amount of residual chromatic dispersion that occurs in a light signal transmitted from the optical transmission device to a downstream device, and a superimposer configured to superimpose the first signal on the light signal transmitted from the optical transmission device and transmit the light signal superimposed by the first signal to the downstream device.

摘要翻译： 一种光传输装置，包括：信号发生器，被配置为产生与从所述光传输装置发送到下游装置的光信号中发生的残余色散量对应的第一信号;以及叠加器，被配置为将所述第一信号叠加在 光信号从光传输装置发送，并将由第一信号叠加的光信号发送到下游装置。

公开(公告)号：US08275267B2

公开(公告)日：2012-09-25

申请号：US12785679

申请日：2010-05-24

申请人： Yuejian Wu

发明人： Yuejian Wu

IPC分类号： H04B10/12 ,  H04B10/00 ,  H04B10/06

CPC分类号： H04B10/2513

摘要： Filter implementation using Hermitian conjugates and time division multiplexing (TDM) is disclosed to more efficiently compensate for chromatic dispersion of optical signals transmitted over a fiber optic medium. Embodiments for an input, filter, and output sections of a Digital Signal Processor (DSP) are described. The disclosed methods, and corresponding apparatus and systems enables a substantial reduction in the complexity of the hardware needed to implement CD compensation in the DSP. According to another embodiment, Inverse-Fourier transform circuits receive TDM data from the filter section and assemble the TDM data format back to a non-TDM format.

摘要翻译： 公开了使用埃米特共轭和时分复用（TDM）的滤波器实现，以更有效地补偿通过光纤介质传输的光信号的色散。 描述了数字信号处理器（DSP）的输入，滤波器和输出部分的实施例。 所公开的方法和相应的装置和系统能够显着降低在DSP中实现CD补偿所需的硬件的复杂性。 根据另一实施例，逆傅立叶变换电路从滤波器部分接收TDM数据，并将TDM数据格式组合成非TDM格式。