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1. 发明申请

US20130051793A1 OPTICAL SIGNAL MONITORING METHOD AND APPARATUS 有权
标题翻译：光信号监测方法和装置
公开(公告)号：US20130051793A1
公开(公告)日：2013-02-28
申请号：US13253016
申请日：2011-10-04
申请人： ROBERTO MAGRI , RAFFAELE CORSINI , ERNESTO CIARAMELLA , EMMA MATARAZZO , ANDREA PERACCHI
发明人： ROBERTO MAGRI , RAFFAELE CORSINI , ERNESTO CIARAMELLA , EMMA MATARAZZO , ANDREA PERACCHI
IPC分类号： H04B10/08 , H04B17/00
CPC分类号： H04B10/2569
摘要： A method of monitoring a differential group delay, DGD, of an optical communications signal having a polarisation multiplexed modulation format is described. The method includes the steps of receiving a signal and performing analogue to digital conversion of the signal to generate a digitised signal corresponding to one polarisation of the signal and to generate another digitised signal corresponding to another polarisation of the signal, and applying a polarisation mode dispersion, PMD, compensation to each of the digitised signals. The method further includes the steps of obtaining an indication of the channel transfer function of the optical communications signal, determining a DGD in dependence on the indication of the channel transfer function, determining a delay between the PMD compensated digitised signals, subtracting the delay from the DGD to obtain a corrected DGD, and generating and transmitting a monitoring signal with an indication of the corrected DGD.
摘要翻译：描述了具有偏振复用调制格式的光通信信号的差分组延迟DGD的监视方法。该方法包括以下步骤：接收信号并执行信号的模数转换以产生对应于信号的一个极化的数字化信号，并产生对应于该信号的另一极化的另一数字化信号，以及施加偏振模色散，PMD，补偿每个数字化信号。该方法还包括以下步骤：获得光通信信号的信道传递函数的指示，根据信道传递函数的指示确定DGD，确定PMD补偿的数字化信号之间的延迟，减去从 DGD以获得校正的DGD，以及生成并发送具有校正的DGD的指示的监视信号。

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