公开(公告)号：US20040037570A1

公开(公告)日：2004-02-26

申请号：US10617204

申请日：2003-07-11

申请人： ALCATEL

发明人： Berthold Wedding

IPC分类号： H04B010/14 ,  H04B010/18

CPC分类号： H04B10/504 ,  H04L27/2096

摘要： To transmit a digital signal over an optical fiber link, the digital signal is modulated onto an optical carrier using frequency shift keying modulation at a modulation index of h

摘要翻译： 为了通过光纤链路传输数字信号，数字信号在调制指数为h <0.5的频移键控调制下调制到光载波上。 在光纤中的非线性传输效应的影响下，调制指数h <0.5的使用导致光信号的最大允许发射功率的增加，增加的接收机灵敏度和增加的频谱效率。

公开(公告)号：US20040037568A1

公开(公告)日：2004-02-26

申请号：US10613917

申请日：2003-07-03

发明人： Stephen G. Evangelides JR.

IPC分类号： H04B010/18 ,  H04B010/16

CPC分类号： H04B10/2972 ,  H04B10/25253

摘要： An optical transmission system includes a first transmitter unit and a first receiver unit. A first optical transmission path interconnects the first transmitter unit and the first receiver unit. The first optical transmission path is defined by at least three transmission spans. The first optical transmission path has a periodic dispersion map with a first periodic component comprising a fixed portion and an adjustable portion, and a second periodic component greater in length than the first periodic component. The fixed portion of the first periodic component of the periodic dispersion map is provided by the respective transmission spans. A plurality of optical repeaters each optically couple adjacent ones of the transmission spans to one another. A first plurality of adjustable dispersion trimming element are each located in one of the optical repeaters and optically couples one of the transmission spans to an optical amplifier located in the optical repeater. The first adjustable dispersion trimming elements each have an adjustable path average dispersion that provides the adjustable portion of the first periodic component. The adjustable path average dispersion is selected such that the fixed portion of the first periodic component of the periodic dispersion map plus the adjustable component of the dispersion map associated therewith has a desired value.

摘要翻译： 光传输系统包括第一发射机单元和第一接收机单元。 第一光传输路径将第一发射机单元和第一接收机单元相互连接。 第一光传输路径由至少三个传输跨度限定。 第一光传输路径具有包括固定部分和可调节部分的第一周期性分量的周期性色散图以及长度大于第一周期分量的第二周期分量。 周期性色散图的第一周期性分量的固定部分由相应的传输跨度提供。 多个光学中继器，每个光学中继器将相邻的传输跨度彼此光耦合。 第一多个可调节色散修剪元件分别位于一个光中继器中，并且将一个传输跨度光耦合到位于光中继器中的光放大器。 第一可调色散修剪元件各自具有提供第一周期性元件的可调节部分的可调路径平均色散。 选择可调路径平均色散使得周期色散图的第一周期分量的固定部分加上与其相关联的色散图的可调组件具有期望值。

公开(公告)号：US20030108267A1

公开(公告)日：2003-06-12

申请号：US10204812

申请日：2002-10-30

发明人： Adalbert Bandemer ,  Egbert Krause

IPC分类号： G02B006/27 ,  H04B010/08 ,  G02B027/28 ,  G02B006/26 ,  H04B010/18

CPC分类号： H04B10/2569 ,  G01M11/336

摘要： The invention relates to a device for detecting the PMD of optoelectronic transmission lines. The inventive device is characterized in that it comprises a narrow-band, tuneable laser, whose illumination is superimposed with the illumination of the transmission line to be analysed and an optoelectronic heterodyne receiver which receives the superimposed signal.

摘要翻译： 本发明涉及一种用于检测光电传输线路的PMD的装置。 本发明的装置的特征在于它包括窄带可调谐激光器，其照明与要分析的传输线的照明叠加，以及接收叠加信号的光电外差接收器。

公开(公告)号：US20030103723A1

公开(公告)日：2003-06-05

申请号：US10254420

申请日：2002-09-25

发明人： Marc Bohn ,  Georg Mohs ,  Sven Otte ,  Christian Scheerer ,  Christoph Glingener ,  Jan Mietzner ,  Werner Rosenkranz

IPC分类号： G02B006/26 ,  H04J014/02 ,  H04B010/18

CPC分类号： H04B10/2507 ,  H04B10/25133 ,  H04B10/2572

摘要： A compensation system for adaptive equalization of an optical signal, wherein an optical filter, whose complex coefficients are adjustable, is used for signal equalization. The quality of the optical signal is used, after conversion to an electrical data signal, as a control criterion. The compensation device can largely compensate for distortion produced by dispersion, polarization mode dispersion or self phase modulation. An optical compensation filter with a wide free spectral range is used to compensate for the wavelength-dependent dispersion in a wavelength-division multiplexed system. The setting of the filter may be fixed, or may be adjusted adaptively in a closed control loop.

摘要翻译： 用于光信号的自适应均衡的补偿系统，其中复数系数可调的滤光器用于信号均衡。 在转换为电数据信号之后，将光信号的质量用作控制标准。 补偿装置可以大大补偿由色散，偏振模色散或自相位调制产生的失真。 使用具有宽自由光谱范围的光学补偿滤波器来补偿波分复用系统中的依赖于波长的色散。 过滤器的设置可以是固定的，或者可以在闭合的控制回路中自适应地调整。

公开(公告)号：US20020012147A1

公开(公告)日：2002-01-31

申请号：US09771660

申请日：2001-01-30

发明人： Neville John Hazell ,  David Wall ,  Peter Terribili ,  Olivier Gautheron ,  Jose Chesnoy ,  Gerard Bourret

IPC分类号： H04B010/18 ,  H04B010/12 ,  H04B010/00

CPC分类号： H04B10/2525 ,  H04B2210/256 ,  H04B2210/258

摘要： The present invention provides a method of dispersion compensation comprising the steps of: receiving an optical signal having a number of channels separated by wavelength; and applying dispersion compensation over at least one predetermined wavelength band independently of wavelengths outside the wavelength band, wherein the wavelength band spans a plurality of channels numbering less than the total number of channels in the signal. The present invention allows dispersion compensation to be applied to a group of channels within a wavelength band with the use of a dispersion compensation element optimised for the particular wavelength band in terms of dispersion compensation and attenuation. Two or more wavelength bands may be chosen to collectively span a WDM signal. Accordingly, the dispersion compensation characteristics of a number dispersion compensation elements may be collocated to create a favourable dispersion compensation characteristic extending over the bandwidth of WDM signal, without the need to treat each channel individually. A mid-span single device permits 40 channels at 10 Gbitsnull1 over two bands over a distance of at least 6000 km. The simple configuration allows for rapid implementation.

摘要翻译： 本发明提供一种色散补偿方法，包括以下步骤：接收具有由波长隔开的多个通道的光信号; 以及独立于所述波长带外的波长而在至少一个预定波长带上施加色散补偿，其中所述波长带跨越编号小于所述信号中的信道总数的多个信道。 本发明允许使用在色散补偿和衰减方面针对特定波长带优化的色散补偿元件将色散补偿应用于波长带内的一组信道。 可以选择两个或更多个波长带以共同跨越WDM信号。 因此，可以配置数个色散补偿元件的色散补偿特性，以产生在WDM信号的带宽上延伸的良好的色散补偿特性，而不需要分别处理每个通道。 中跨单个设备允许在至少6000公里的两个频带上的10个千兆位-1的40个信道。 简单的配置允许快速实现。

公开(公告)号：US20040101300A1

公开(公告)日：2004-05-27

申请号：US10275454

申请日：2003-07-01

发明人： Joachim Bialas ,  Anton Schex

IPC分类号： H04B010/18

CPC分类号： H04B10/07955 ,  H04B10/077

摘要： The invention relates to the determination of the carrier-to-noise ratio for optical transmissions when a noise-affected optical signal containing a message signal is transmitted along an optical signal transmission path, whereby the optical signal together with the optical noise transmitted therewith is fed to an optical filter (OF). The optical output signal from the above is converted into a corresponding electrical signal in a detector device (Det) and either the mid-frequency of the optical filter (OF), or the detector device (Det) is periodically modulated with a modulation signal (Um). The received total light power (Pges) is determined from a direct current component of the electrical signal and the signal power (Pse) of said message signal is determined from a time-dependent modulation component. The carrier-to-noise ratio is determined from the above parameters.

摘要翻译： 本发明涉及当包含消息信号的噪声影响光信号沿着光信号传输路径传输时，确定光传输的载波噪声比，由此光信号与其传输的光噪声一起被馈送 到光学滤光器（OF）。 来自上述的光输出信号在检测器装置（Det）中被转换成相应的电信号，并且光滤波器（OF）的中频或检测器装置（Det）的周期性调制是用调制信号（ 嗯）。 从电信号的直流分量确定接收到的总光功率（Pges），并且从时间相关的调制分量确定所述消息信号的信号功率（Pse）。 从上述参数确定载波噪声比。

公开(公告)号：US20040067066A1

公开(公告)日：2004-04-08

申请号：US10302851

申请日：2002-11-25

申请人： Innovation Core SEI, Inc.

发明人： Katsumi Uesaka

IPC分类号： H04B010/00 ,  H04B010/12 ,  H04B010/18

CPC分类号： H04B10/25133

摘要： An optical transmission system comprising an input for accepting a signal, a laser diode within an optical transmitter for signal modulation and/or for signal amplification, a nonlinear material for compensating signal distortions, a transmission fiber for signal transmission, and an optical receiver for receiving the signal. The optical transmission system may include a multiple of input signals, each input signal fed into one of a multiple of optical transmitters. Each of the multiple of optical transmitters is coupled to a nonlinear material. The output of each nonlinear material is coupled to an optical multiplexer for multiplexing the multiple of input signals into a multiplexed signal for transmission through a transmission fiber. The multiplexed signal is then de-multiplexed into a multiple of de-multiplexed signals, each de-multiplexed signal corresponding to each of the multiple of input signals, and each de-multiplexed signal is received by one of a multiple of receivers.

摘要翻译： 一种光传输系统，包括用于接收信号的输入端，用于信号调制和/或用于信号放大的光发射机内的激光二极管，用于补偿信号失真的非线性材料，用于信号传输的传输光纤和用于接收的光接收器 信号。 光传输系统可以包括多个输入信号，每个输入信号被馈送到多个光发射机中的一个。 多个光发射机中的每一个耦合到非线性材料。 每个非线性材料的输出耦合到光复用器，用于将多个输入信号复用成多路复用信号以通过传输光纤传输。 然后将复用的信号解复用为多路复用信号，每个解复用信号对应于多个输入信号中的每一个，并且每个解复用信号由多个接收机之一接收。

公开(公告)号：US20040052523A1

公开(公告)日：2004-03-18

申请号：US09758219

申请日：2001-01-12

发明人： Michael John Yadlowsky ,  Mark Francis Krol ,  J. Michael Harris

IPC分类号： H04B010/08 ,  H04B010/18 ,  H04J014/02

CPC分类号： H04J14/0227 ,  H04B10/07953

摘要： A method of and system for estimating the bit error rate of a channel in an optical communication system includes a method of and system for measuring the in-band cross-talk of the channel in a wavelength division multiplexed system. A single channel is selected from the plurality of channels in the optical communication system. The signal in this single channel is passed to a digital signal processor proportional to the time rate of change of a phase of an optical source generating the signal. The digital signal processor converts the filtered signal into the frequency domain, and a spectrum analyzer determines the features of the in-band cross-talk from the signal in the frequency domain. The features of the in-band cross-talk may be combined with other measured noise features, such as the power spectral density, to estimate BER.

摘要翻译： 用于估计光通信系统中的信道的误码率的方法和系统包括用于测量波分复用系统中信道的带内串扰的方法和系统。 从光通信系统中的多个信道中选择单个信道。 该单通道中的信号被传递到与产生信号的光源的相位的时间变化率成比例的数字信号处理器。 数字信号处理器将滤波后的信号转换成频域，频谱分析仪根据频域信号确定带内串扰的特征。 带内串扰的特征可以与其他测量的噪声特征（例如功率谱密度）组合以估计BER。

公开(公告)号：US20040037562A1

公开(公告)日：2004-02-26

申请号：US10453898

申请日：2003-06-03

发明人： Stephen G. Evangelides JR.

IPC分类号： H04J014/02 ,  H04B010/18

CPC分类号： H04B10/2557 ,  H04B10/2563

摘要： An optical communication system transmitting a plurality of channel wavelengths is provided. The system includes a transmitter unit, a receiver unit, and an optical transmission path interconnecting the transmitter and receiver units. The transmission path has a concatonation of optical fibers defining a dispersion map such that each of the channel wavelengths are located at FMX and XPM antiresonances at which FWM and XPM are suppressed.

摘要翻译： 提供了发送多个信道波长的光通信系统。 该系统包括发射机单元，接收机单元和互连发射机和接收机单元的光传输路径。 传输路径具有限定色散映射的光纤的集合，使得每个信道波长位于FMM和XPM反谐振处，在FWM和XPM被抑制的情况下。

公开(公告)号：US20040008993A1

公开(公告)日：2004-01-15

申请号：US10193505

申请日：2002-07-10

发明人： Shu-Lin Tai

IPC分类号： H04B010/18 ,  H04J014/02

CPC分类号： H04B10/2569 ,  H04J14/02 ,  H04J14/06

摘要： An operation unit of a PMD compensation module includes a PBS, a compensated part and a combiner. The PBS separates an optical input into a first polarized signal and a second polarized signal. The compensated part includes a fixed prism and a movable prism. The first polarized signal outputted from the PBS travels through the fixed prism and the movable prism in series. The light path of the first polarized signal in the movable prism is elongated or shortened according to a position of the movable prism. A continuously variable delay can thus be applied between the first and second polarized signals. The combiner recombines the first polarized signal received from the compensated part and the second polarized signal received from the PBS into an optical output signal.

摘要翻译： PMD补偿模块的操作单元包括PBS，补偿部分和组合器。 PBS将光输入分离成第一偏振信号和第二偏振信号。 补偿部分包括固定棱镜和可动棱镜。 从PBS输出的第一极化信号通过固定棱镜和可动棱镜串联。 可动棱镜中的第一极化信号的光路根据可动棱镜的位置被拉长或缩短。 因此可以在第一和第二极化信号之间施加连续可变的延迟。 组合器将从补偿部分接收的第一极化信号和从PBS接收的第二极化信号复合成光输出信号。