公开(公告)号：US07317855B2

公开(公告)日：2008-01-08

申请号：US11015509

申请日：2004-12-16

申请人： Xin Chen ,  Ming-Jun Li ,  Nicol A. Heron ,  Jeanne L. Swecker ,  Naiyue Zhou

发明人： Xin Chen ,  Ming-Jun Li ,  Nicol A. Heron ,  Jeanne L. Swecker ,  Naiyue Zhou

IPC分类号： G02B6/02

CPC分类号： C03B37/02745 ,  C03B37/032 ,  C03B37/12 ,  C03B2203/19 ,  C03B2203/36 ,  C03B2205/06 ,  G02B6/02285 ,  G02B6/278

摘要： A method for producing low-PMD fiber, in which a glass fiber is drawn from an optical fiber perform by a tractor which pulls such optical fiber from said perform; subsequent to said tractor pulling the fiber is twisted about its axis to increase the magnitude of twist which is imparted to said fiber. The fiber is then wound onto a fiber storage spool such that at least a portion of the twist imparted to said optical fiber is retained while said fiber is wound on said spool.

摘要翻译： 一种生产低PMD纤维的方法，其中玻璃纤维从由所述表面拉动这种光纤的拖拉机执行的光纤中拉出; 在所述拖拉机拉动之后，纤维围绕其轴线扭曲以增加赋予所述纤维的捻度的大小。 然后将纤维卷绕到纤维储存卷轴上，使得当所述纤维缠绕在所述卷轴上时，赋予所述光纤的扭曲的至少一部分被保持。

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。