The degree of polarization (DOP) ellipsoid can be used as either feedback or feedforward signal for automatic polarization mode dispersion compensation. We have realized the experiment for obtaining DOP ellipsoid from...The degree of polarization (DOP) ellipsoid can be used as either feedback or feedforward signal for automatic polarization mode dispersion compensation. We have realized the experiment for obtaining DOP ellipsoid from 100 sampling data of output states of polarization using particle swarm optimization (PSO) as ellipsoid data fitting algorithm. It was shown that the PSO algorithm was powerful for ellipsoid data fitting with high precision within 250 ms.展开更多
以斯托克斯矢量理论为基础,通过搭建偏振传输半实物模拟装置进行模拟实验,观测激光在模拟环境(不同浓度的椭球粒子在非均匀分布状态)下偏振度(degree of polarization,DOP)的变化。实验选取灵芝孢子碳化粉末作为椭球粒子的实验对象,通...以斯托克斯矢量理论为基础,通过搭建偏振传输半实物模拟装置进行模拟实验,观测激光在模拟环境(不同浓度的椭球粒子在非均匀分布状态)下偏振度(degree of polarization,DOP)的变化。实验选取灵芝孢子碳化粉末作为椭球粒子的实验对象,通过烟雾机将椭球粒子形成不同浓度的烟雾,研究入射波长为532nm、671nm的激光在0°、+45°、90°的线偏振光以及左旋圆偏振光经过模拟环境后偏振度(DOP)的变化情况。实验结果表明:入射偏振光随着烟雾浓度的增大,偏振度呈下降趋势;3种入射线偏振光随浓度增大降幅不尽相同,没有明显的规律可循;不同波长低浓度烟雾时,线偏振光与圆偏振光的偏振度下降幅度大抵相同,大约为3%左右;随着烟雾浓度的增大,线偏振光的偏振度表现出不同程度的下降,可达20%,圆偏振光的偏振度仅下降5%,表现出了较好的保偏能力。展开更多
基金This work was supported by the National Natural Science Foundation of China (No. 60072042 and 60377026), the National "863" High Technology Project of China (No. 2001AA122041 and 2003AA311070), and Corporative Building Project of Beijing Educational Committee (No. XK100130437).
文摘The degree of polarization (DOP) ellipsoid can be used as either feedback or feedforward signal for automatic polarization mode dispersion compensation. We have realized the experiment for obtaining DOP ellipsoid from 100 sampling data of output states of polarization using particle swarm optimization (PSO) as ellipsoid data fitting algorithm. It was shown that the PSO algorithm was powerful for ellipsoid data fitting with high precision within 250 ms.
文摘以斯托克斯矢量理论为基础,通过搭建偏振传输半实物模拟装置进行模拟实验,观测激光在模拟环境(不同浓度的椭球粒子在非均匀分布状态)下偏振度(degree of polarization,DOP)的变化。实验选取灵芝孢子碳化粉末作为椭球粒子的实验对象,通过烟雾机将椭球粒子形成不同浓度的烟雾,研究入射波长为532nm、671nm的激光在0°、+45°、90°的线偏振光以及左旋圆偏振光经过模拟环境后偏振度(DOP)的变化情况。实验结果表明:入射偏振光随着烟雾浓度的增大,偏振度呈下降趋势;3种入射线偏振光随浓度增大降幅不尽相同,没有明显的规律可循;不同波长低浓度烟雾时,线偏振光与圆偏振光的偏振度下降幅度大抵相同,大约为3%左右;随着烟雾浓度的增大,线偏振光的偏振度表现出不同程度的下降,可达20%,圆偏振光的偏振度仅下降5%,表现出了较好的保偏能力。