Song Dianyou, Wang Zhiyong, Chen Xinwei, Zhang Hongxia, Liu Tiegen
Appl Opt. 2015 Mar 10;54(8):1918-25. doi: 10.1364/AO.54.001918.
Ghost coupling points in distributed polarization crosstalk measurements adopting a white light interferometric method are analyzed under the circumstances of anisotropy perturbation induced polarization crosstalk and principal axis misalignment induced polarization crosstalk in polarization-maintaining fiber. The relationship between the intensities of the ghost coupling points and the real crosstalk points, as well as the relationship between their positions, are theoretically analyzed and proved by experiment. A simple method has been developed to identify the ghost coupling points by using a rotatable half-wave plate to adjust the angle between the principal axis of the analyzer and the exciting mode propagating in the polarization-maintaining fiber. The experimental results have a good agreement with the theoretical results.
分析了采用白光干涉法进行分布式偏振串扰测量时，在保偏光纤中由各向异性扰动引起的偏振串扰和主轴失准引起的偏振串扰情况下的鬼耦合点。从理论上分析并通过实验证明了鬼耦合点强度与实际串扰点强度之间的关系以及它们位置之间的关系。开发了一种简单的方法，通过使用可旋转的半波片来调整分析仪主轴与在保偏光纤中传播的激发模式之间的角度来识别鬼耦合点。实验结果与理论结果吻合良好。
