公开(公告)号：US06946646B2

公开(公告)日：2005-09-20

申请号：US10287995

申请日：2002-11-05

申请人： Xin Chen ,  Nicol A. Heron ,  Timothy L. Hunt ,  Eric J. Mozdy ,  Darren A. Stainer

发明人： Xin Chen ,  Nicol A. Heron ,  Timothy L. Hunt ,  Eric J. Mozdy ,  Darren A. Stainer

IPC分类号： G01J3/447 ,  G01J4/00 ,  G01M11/00 ,  G02F1/01 ,  H04B10/00

CPC分类号： G01M11/3181

摘要： A method for screening fiber polarization mode dispersion using a polarization optical time domain reflectometer. A pulse radiation is emitted into the fiber under test, and the backscattered radiation is measured by the POTDR and used to obtain a POTDR trace. The POTDR trace is then analyzed to compare the variation of signals along the length of the fiber, the variation in signals relating to the level of PMD along the length of the fiber. Because high levels of PMD correspond to localized levels of low variability, by setting the variability of signal threshold sufficiently low, fibers having unacceptably high localized PMD can be identified and removed.

摘要翻译： 一种使用偏振光学时域反射计屏蔽光纤偏振模色散的方法。 脉冲辐射被发射到被测光纤中，反向散射辐射由POTDR测量并用于获得POTDR迹线。 然后分析POTDR迹线以比较沿着光纤长度的信号的变化，与沿着光纤长度的PMD的水平相关的信号的变化。 由于高水平的PMD对应于低变异性的局部水平，通过将信号阈值的可变性设置得足够低，可以识别和去除具有不可接受的高局部PMD的纤维。