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：US07580630B2

公开(公告)日：2009-08-25

申请号：US10940459

申请日：2004-09-14

申请人： Huai Kee ,  Richard Epworth ,  Alan Robinson ,  Robin Rickard

发明人： Huai Kee ,  Richard Epworth ,  Alan Robinson ,  Robin Rickard

IPC分类号： H04J14/00 ,  H04B10/08 ,  H04B10/04

CPC分类号： H04B10/2543 ,  H04B10/548 ,  H04B10/58

摘要： A transmitter for an optical transmission system transmits an optical sub carrier multiplexed signal comprising number of sub-carriers, onto an optical transmission path, and provides spectral shaping by different magnitudes of the sub-carriers, or different modulation formats for different sub carriers. This spectral shaping can reduce performance degradation by Kerr effect optical non linearities. This can mean higher input powers may be launched. The magnitudes can provide a signal spectrum which is lower near a center of a band of sub carriers than near an edge of the band. Such spectral shaping can be provided in the receiver either to undo the pre emphasis in the transmitter, or to reduce non linearities from components at the receiving side.

摘要翻译： 用于光传输系统的发射机将包括多个子载波的光副载波复用信号发送到光传输路径上，并且通过不同幅度的子载波或不同子载波的不同调制格式提供频谱整形。 这种频谱整形可以通过克尔效应光学非线性来降低性能下降。 这可能意味着可能会启动更高的输入功率。 幅度可以提供在子载波带的中心附近比带的边缘附近较低的信号频谱。 可以在接收机中提供这样的频谱整形以消除发射机中的预加重，或者减少来自接收侧的组件的非线性。

公开(公告)号：US07389055B1

公开(公告)日：2008-06-17

申请号：US11082999

申请日：2005-03-17

申请人： Robin Rickard ,  Hual Kee ,  Alan Robinson

发明人： Robin Rickard ,  Hual Kee ,  Alan Robinson

IPC分类号： H04B10/06

CPC分类号： H04B10/677 ,  H04B10/505 ,  H04B10/5053 ,  H04B10/50577 ,  H04B10/6911 ,  H04B10/695

摘要： An optical receiver for receiving an optical differential phase shift keyed signal has an optical component sensitive to the optical phase of the signal, such as an interferometer, a device arranged to generate a control signal by non linear limiting of an output of the optical component, such as an RF amplifier arranged to operate in a region near saturation point, and a phase controller for tuning a phase response of the optical component to the received signal according to the control signal.

摘要翻译： 用于接收光学差分相移键控信号的光学接收器具有对信号的光学相位敏感的光学部件，例如干涉仪，被设置成通过光学部件的输出的非线性限制来产生控制信号的装置， 例如布置成在靠近饱和点的区域中工作的RF放大器，以及根据控制信号将光学部件的相位响应调谐到接收信号的相位控制器。

公开(公告)号：US20050271387A1

公开(公告)日：2005-12-08

申请号：US10940459

申请日：2004-09-14

申请人： Huai Kee ,  Richard Epworth ,  Alan Robinson ,  Robin Rickard

发明人： Huai Kee ,  Richard Epworth ,  Alan Robinson ,  Robin Rickard

IPC分类号： H04B10/00 ,  H04B10/155 ,  H04B10/18

CPC分类号： H04B10/2543 ,  H04B10/548 ,  H04B10/58

摘要： A transmitter for an optical transmission system transmits an optical sub carrier multiplexed signal comprising number of sub-carriers, onto an optical transmission path, and provides spectral shaping by different magnitudes of the sub-carriers, or different modulation formats for different sub carriers. This spectral shaping can reduce performance degradation by Kerr effect optical non linearities. This can mean higher input powers may be launched. The magnitudes can provide a signal spectrum which is lower near a centre of a band of sub carriers than near an edge of the band. Such spectral shaping can be provided in the receiver either to undo the pre emphasis in the transmitter, or to reduce non linearities from components at the receiving side.

摘要翻译： 用于光传输系统的发射机将包括多个子载波的光副载波复用信号发送到光传输路径上，并且通过不同幅度的子载波或不同子载波的不同调制格式提供频谱整形。 这种频谱整形可以通过克尔效应光学非线性来降低性能下降。 这可能意味着可能会启动更高的输入功率。 幅度可以提供在子载波带的中心附近比带的边缘附近较低的信号频谱。 可以在接收机中提供这样的频谱整形以消除发射机中的预加重，或者减少来自接收侧的组件的非线性。

公开(公告)号：US06847769B1

公开(公告)日：2005-01-25

申请号：US09739529

申请日：2000-12-15

申请人： Alan Robinson ,  Jonathan King ,  Stephen Wilson

发明人： Alan Robinson ,  Jonathan King ,  Stephen Wilson

IPC分类号： H01S3/067 ,  G02B6/16

CPC分类号： H01S3/06708

摘要： An optical amplifier comprises a doped fiber core and a cladding layer surrounding the core. The mode field diameter of the fiber is greater than 8 μm and the refractive index difference between the core and the cladding layer is selected such that the cut-off wavelength at which the fiber becomes single mode lies in the range 1000-1550 nm. This amplifier uses a large made field diameter fiber, which reduces the intensity for a specified output power. This results in reduced filtering of the low frequency components of the signal. The refractive index difference between the core and cladding is selected such that the fiber is multi-mode at 980 nm, which enables bend performance to be improved.

摘要翻译： 光放大器包括掺杂光纤芯和围绕芯的包覆层。 纤维的模场直径大于8μm，并且选择芯和包层之间的折射率差，使得光纤变成单模的截止波长在1000-1550nm的范围内。 该放大器使用大的制造的直径光纤，这降低了指定输出功率的强度。 这导致信号的低频分量的滤波减少。 芯和包层之间的折射率差被选择为使得光纤在980nm处是多模的，这使得能够改善弯曲性能。

公开(公告)号：US06459533B1

公开(公告)日：2002-10-01

申请号：US09603080

申请日：2000-06-26

申请人： Terry V Clapp ,  Alan Robinson

发明人： Terry V Clapp ,  Alan Robinson

IPC分类号： G02B2700

CPC分类号： G02F1/1326 ,  G02B2006/12107 ,  G02B2006/12164 ,  G02F1/011 ,  G02F1/0147 ,  G02F2201/307

摘要： An optical waveguide format tuneable optical filter is formed using Bragg grating reflectors to define one or more optical cavities of a Fabry Pérot etalon, the or each cavity of the etalon including one or more slots containing a controllable refractive index medium, for instance a silicone gel whose index is regulated by Joule heating, or a polymer dispersed liquid crystal whose index is electric field regulated. Strong coupling coefficient (˜ a few tens mm−1) gratings may be made using lithography to form linear arrays of buried high index inclusions extending along the waveguide core axis.

摘要翻译： 使用布拉格光栅反射器形成光波导格式的可调谐光学滤波器以限定法布里标准具的一个或多个光学腔，标准具的每个空腔包括一个或多个包含可控折射率介质的槽，例如硅胶 其指数由焦耳加热调节，或指数为电场调节的聚合物分散液晶。 可以使用光刻法形成强耦合系数（〜几十mm -1）的光栅，以形成沿着波导芯轴延伸的埋藏的高折射率夹杂物的线性阵列。

公开(公告)号：US6124960A

公开(公告)日：2000-09-26

申请号：US929360

申请日：1997-09-08

申请人： Dietmar Garthe ,  Ross Alexander Saunders ,  Alan Robinson ,  Maurice O'Sullivan ,  Rongqing Hui

发明人： Dietmar Garthe ,  Ross Alexander Saunders ,  Alan Robinson ,  Maurice O'Sullivan ,  Rongqing Hui

IPC分类号： G02F1/01 ,  H04B3/06 ,  H04B10/02 ,  H04B10/18 ,  H04B10/04

CPC分类号： H04B10/25137 ,  H04B10/255 ,  H04B10/2557

摘要： In a WDM transmission system carrying amplitude modulated traffic in which significant cross-phase modulation occurs, each of the individual channels is pre-chirped at the transmitter with replicas, or low-pass filtered replicas of the amplitude modulation applied to each of the other channels. Prechirping of each individual channel with a replica of the amplitude modulation applied to that channel may be added in order additionally to provide compensation for self-phase modulation.

摘要翻译： 在承载幅度调制业务的WDM传输系统中，发生显着的跨相位调制，各个信道在发射机处被预先啁啾，其中复制或低通滤波后的复制品被施加到每个其它信道 。 每个单独信道的预加速可以应用于该信道的幅度调制的复制品，以便额外地添加以对自相位调制提供补偿。

公开(公告)号：US5949560A

公开(公告)日：1999-09-07

申请号：US795684

申请日：1997-02-05

申请人： Kim Byron Roberts ,  Alan Robinson ,  Richard Edward Epworth ,  Henry John Harvey

发明人： Kim Byron Roberts ,  Alan Robinson ,  Richard Edward Epworth ,  Henry John Harvey

IPC分类号： G01M11/02 ,  H04B3/46 ,  H04B10/02 ,  H04B10/08 ,  H04B10/135 ,  H04B10/18 ,  H04B10/00

CPC分类号： H04B10/2572 ,  H04B10/07951 ,  H04B10/2569

摘要： An Optical Transmission System includes a monitor for outputting monitored data representative of the extent to which an optical signal is degraded by polarization mode dispersion. The monitor measures the degree of depolarization present in a sample of the optical signal derived from an optical tap, the depolarization being associated with polarization variation at the bit rate frequency of a signal data stream carried by the optical signal. The monitored data is used to control operation of the system to reroute the optical path taken by the optical signal in the event of a threshold level of polarization mode dispersion being exceeded. A transmitter of the optical signal may also be controlled to minimize polarization mode dispersion by varying the polarization state of the optical signal at launch so as to reduce the measured monitor data. The monitor functions during normal transmission of optical signals without the need for shutting down links of the system for measurement purposes. The invention has particular application to long haul optical transmissions of data streams at 10 Gb/sec or more.

摘要翻译： 光传输系统包括用于输出表示通过偏振模色散使光信号劣化程度的监视数据的监视器。 监视器测量从光学抽头导出的光学信号的样本中存在的去极化程度，去极化与由光信号携带的信号数据流的比特率频率处的偏振变化相关联。 所监视的数据用于控制在超过极化模式色散的阈值水平的情况下系统重新路由由光信号拍摄的光路的操作。 也可以通过改变发射时的光信号的偏振状态来控制光信号的发射器，以使偏振模色散最小化，从而减少测量的监视数据。 监视器在光信号的正常传输期间起作用，而不需要关闭系统的链路用于测量目的。 本发明特别适用于10Gb /秒以上的数据流的长距离光传输。

公开(公告)号：US07558479B1

公开(公告)日：2009-07-07

申请号：US10825542

申请日：2004-04-15

申请人： Alan Robinson

发明人： Alan Robinson

IPC分类号： H04B10/08 ,  H04B10/00

CPC分类号： H04B10/0795 ,  H04B10/25137 ,  H04B10/2543 ,  H04B2210/252 ,  H04B2210/254

摘要： An optical communications system has a plurality of spans between a transmitter and a receiver. The receiver has optical to electrical conversion circuitry for converting the received optical signal to an electric signal, analogue to digital conversion circuitry and digital signal processing means for analysing the electrical digital signal. The digital signal processing means derives information concerning characteristics of individual spans from the electrical digital signal. This enables parameters such as per-span variations in provisioned power, local dispersion and span loss to be measured. In-service measurements of system characteristics can be used to enable optimisation of the network operation.

摘要翻译： 光通信系统在发射机和接收机之间具有多个跨度。 接收器具有用于将接收到的光信号转换成电信号的光电转换电路，用于分析电数字信号的模数转换电路和数字信号处理装置。 数字信号处理装置从电数字信号中得出关于各个跨度的特性的信息。 这使得可以测量诸如每次跨度变化的参数，局部色散和跨度损失等参数。 可以使用系统特性的在线测量来实现网络操作的优化。

公开(公告)号：US20080237505A1

公开(公告)日：2008-10-02

申请号：US10597468

申请日：2005-02-03

申请人： Marco A. Rodrigues ,  Alan Robinson ,  Lyuba Alboul

发明人： Marco A. Rodrigues ,  Alan Robinson ,  Lyuba Alboul

IPC分类号： G01N23/04

CPC分类号： G01B11/25 ,  G06K9/2036 ,  G06K2209/40 ,  G06T7/521

摘要： A 3D scanning apparatus configured to image a physical entity comprises a radiation projector for projecting a plurality of radiation stripes onto the physical entity, a detector for detecting striped radiation received from the physical entity; and a data storage device for storing the received radiation as a pixellated bitmap image, the apparatus characterised in that the physical entity, the radiation projector and the detector are geometrically arranged to constrain the number of times that each received stripe is permitted to occur in a given pixel row of the bitmap, the geometrica) constraint determining a stored occlusion classification comprising a plurality of types of occlusions and the apparatus additionally comprising an occlusion type processing means configured to utilise the classification for detecting the various types of occlusions in said received image data.

摘要翻译： 被配置为对物理实体成像的3D扫描装置包括用于将多个辐射条投射到物理实体上的辐射投影仪，用于检测从物理实体接收的条纹辐射的检测器; 以及用于将接收的辐射存储为像素化位图图像的数据存储装置，其特征在于，所述物理实体，放射线投射器和检测器被几何地布置成限制允许在每个接收的条带中发生的次数 确定包含多种类型的遮挡的存储的遮挡分类的几何形状约束，并且所述装置还包括被配置为利用所述分类来检测所述接收的图像数据中的各种类型的遮挡的遮挡类型处理装置 。