公开(公告)号：US06734955B2

公开(公告)日：2004-05-11

申请号：US10058948

申请日：2002-01-28

申请人： Mark Stephen Wight ,  Andreas Franz Ludwig Sizmann ,  Mei Du ,  Alan Glen Solheim

发明人： Mark Stephen Wight ,  Andreas Franz Ludwig Sizmann ,  Mei Du ,  Alan Glen Solheim

IPC分类号： G01N2100

CPC分类号： G01M11/338 ,  G01M11/335

摘要： A device for measuring dispersion of a link between two switching nodes of an optical network comprises a phase measuring unit PMU for determining a first phase of a data signal traveling on a first wavelength &lgr;1, and a second phase of the same data signal traveling on a second wavelength &lgr;2, received consecutively over the link under measurement. A dispersion measurement controller controls operation of the phase measuring unit and characterizes the dispersion of the link at a wavelength of interest &lgr;=(&lgr;1+&lgr;2)/2, based on the first and second phases. The PMU includes a frame detector for determining a first and a second rotation signal indicative of the digital offset between the first and second test clocks with a respective frame start, and a phase detector for measuring the phase of these test clocks with respect to a static reference. The static reference is provided by the same data signal transmitted continuously over a reference wavelength. The test and reference clocks are 1:n divided to extend the range of the measurement. A method for characterizing the dispersion of a link of an optical network is also provided.

摘要翻译： 用于测量光网络的两个交换节点之间的链路的色散的设备包括相位测量单元PMU，用于确定在第一波长λ1上行进的数据信号的第一相位，以及在第一波长λ1上行进的相同数据信号的第二相位 第二波长λ2，连续地在测量的链路上接收。 色散测量控制器控制相位测量单元的操作，并且基于第一和第二相来表征在感兴趣的波长λ=（λ1+λ2）/ 2处的链路的色散。 PMU包括帧检测器，用于确定表示第一和第二测试时钟之间的数字偏移的第一和第二旋转信号与相应的帧开始;以及相位检测器，用于测量这些测试时钟相对于静态的相位 参考。 静态参考由在参考波长上连续传输的相同数据信号提供。 测试和参考时钟为1：n，以扩展测量范围。 还提供了用于表征光网络的链路的色散的方法。