公开(公告)号：US06937821B1

公开(公告)日：2005-08-30

申请号：US10008080

申请日：2001-11-02

申请人： Richard W Heath ,  Duncan J Forbes

发明人： Richard W Heath ,  Duncan J Forbes

IPC分类号： H04B10/08

CPC分类号： H04B10/077 ,  H04B10/07955

摘要： A method for detecting power transients in a signal wavelength carried by an optical transmission medium in a band consisting of a first plurality of wavebands, such as a wavelength division multiplexed signal, comprises dividing the band into a second plurality of wavebands, equal to or less than the first plurality, and detecting power transients within each of the second plurality of wavebands. The power of each wavelength in the second plurality of wavebands is determined by detecting the power level in each second plurality of wavebands as a function of the contribution from each of the wavebands in the second plurality of wavebands to derive a plurality of simultaneous equations, equal in number to the second plurality of wavebands, and solving the plurality of simultaneous equations to determine the levels of each wave-length component of each waveband in the second plurality of wavebands. Correlation with error bursts detected in the optical receiver enable an audit of the error event to be conducted.

摘要翻译： 一种用于检测在由诸如波分复用信号的第一多个波段组成的频带中由光传输介质承载的信号波长中的功率瞬变的方法，包括将所述频带划分成等于或小于等于或等于 并且检测所述第二多个波段内的功率瞬变。 通过在第二多个波段中检测功率电平来确定第二多个波段中的每个波长的功率，作为来自第二多个波段中每个波段的贡献的函数，以导出多个联立方程 并且求解多个联立方程以确定第二多个波段中每个波段的每个波长分量的电平。 与在光接收机中检测到的错误突发的相关性使得能够进行错误事件的审计。

公开(公告)号：US06978090B1

公开(公告)日：2005-12-20

申请号：US09629785

申请日：2000-07-31

申请人： Duncan J Forbes ,  Peter Dyke ,  Michael P Dyer

发明人： Duncan J Forbes ,  Peter Dyke ,  Michael P Dyer

IPC分类号： H04B10/20 ,  H04B10/207 ,  H04B10/213

CPC分类号： H04B10/271 ,  H04B10/2755

摘要： A communications network having two complementary optical networks each connectable to a headend, each optical network comprising a plurality of periodic interleaving filters serially connected by optical waveguides such that an output port of one periodic interleaving filter is couple to an input port of another periodic interleaving filter, and wherein an input or output node of the network is formed by a non-serially connected input or output port of a periodic interleaving filter.

摘要翻译： 一种具有两个互补光网络的通信网络，每个互连光网络可连接到头端，每个光网络包括由光波导串联连接的多个周期性交错滤波器，使得一个周期性交织滤波器的输出端口耦合到另一周期性交织滤波器的输入端口 并且其中所述网络的输入或输出节点由周期性交织过滤器的非串行连接的输入或输出端口形成。

公开(公告)号：US06424757B1

公开(公告)日：2002-07-23

申请号：US09474543

申请日：1999-12-29

申请人： Adrian P Sparks ,  Duncan J Forbes

发明人： Adrian P Sparks ,  Duncan J Forbes

IPC分类号： G02B626

CPC分类号： G02B6/3586 ,  G02B6/3512 ,  G02B6/3546 ,  G02B6/3588

摘要： In optical communication switching equipment there is a need to set up optical paths through the switch before there is an optical signal present. The present invention provides an optical switching apparatus comprising: an optical switch having a number of optical paths for switching optical channels; a demultiplexer coupled to said switch; a broadband light source coupled to said demultiplexer which distributes said light in said channels to enable correct alignment of said optical paths.

摘要翻译： 在光通信交换设备中，需要在存在光信号之前通过开关设置光路。 本发明提供了一种光开关装置，包括：光开关，其具有用于切换光通道的多个光路; 耦合到所述开关的解复用器; 耦合到所述解复用器的宽带光源，其将所述光分配在所述通道中以使得所述光路的校准对准。

公开(公告)号：US06400861B1

公开(公告)日：2002-06-04

申请号：US09559854

申请日：2000-04-27

申请人： Duncan J Forbes ,  Robert Spagnoletti ,  Nigel Baker

发明人： Duncan J Forbes ,  Robert Spagnoletti ,  Nigel Baker

IPC分类号： H04J1402

CPC分类号： H04J14/02

摘要： Wave division multiplexers and demultiplexers utilizing fused fiber couplers and similar devices are expensive to implement. This is a barrier to deployment of optical networks particularly in the metro and access areas. The invention provides a cheaper design scheme to help overcome this problem. The invention provides an apparatus arranged to demultiplex a predetermined range and number of wavelengths comprising a plurality of devices each having at least one input port and two output ports, the output ports of each device having a periodic and complimentary series of minimum attenuation wavelength peaks, wherein the devices are arranged such that each demultiplexes a unique series of wavelengths, and wherein the apparatus comprises at least one device having a series of minimum attenuation wavelength peaks which do not correspond to the unique series of wavelengths the device is arranged to demultiplex.

摘要翻译： 使用融合光纤耦合器和类似器件的波分复用器和解复用器实现昂贵。 这是部署光网络的障碍，特别是在地铁和接入区域。 本发明提供了一种更便宜的设计方案来帮助克服这个问题。 本发明提供了一种设备，用于对包括多个装置的预定范围和数量的波长进行解复用，每个装置具有至少一个输入端口和两个输出端口，每个装置的输出端口具有周期性和互补的一系列最小衰减波长峰值， 其中所述装置被布置为使得每个多路复用唯一的一系列波长，并且其中所述装置包括至少一个具有一系列最小衰减波长峰值的装置，所述最小衰减波长峰值不对应于所述装置被布置为解复用的唯一波长序列。