中国激光, 2019, 46 (2): 0208002, 网络出版: 2019-05-09
椭球形粒子浓度对激光偏振传输特性的影响 下载: 1147次
Effect of Ellipsoidal Particle Concentration on Laser Polarization Transmission Characteristics
散射 偏振传输特性 偏振度 蒙特卡罗仿真 椭球形粒子 scattering polarization transmission characteristics polarization degree Monte Carlo simulation ellipsoidal particles
摘要
采用随机抽样拟合相函数的蒙特卡罗仿真方法,模拟了偏振光经过椭球形粒子发生多次散射后的偏振特性,并通过实验验证了其正确性。以长、短轴比为1.5的椭球形酵母菌粒子为研究对象,研究了激光在椭球形粒子烟雾中传输时的偏振特性。研究了波长为532 nm的0°线偏振光、45°线偏振光以及左旋圆偏振光在椭球形粒子烟雾扩散过程中偏振态的变化情况。结果表明,椭球形粒子的浓度越高,偏振度变化的随机性越大,且圆偏振光的保偏性优于线偏振光。在相同浓度下,不同起偏角度的线偏振光对偏振态的影响差别不大。
Abstract
The Monte Carlo simulation method based on phase function fitting with random sampling is used to simulate the polarization characteristics of polarized light after multiple scattering by ellipsoidal particles, and its correctness is also verified by experiments. The ellipsoidal yeast particles with a long and short axis ratio of 1.5 are taken as study target, and the polarization transmission characteristics of laser are studied when propagating in soot. The polarization changes of 532 nm laser with 0° linear polarization, 45° linear polarization and left circular polarization are investigated during the ellipsoidal particle diffusion process. The results show that the higher the ellipsoidal particle concentration is, the greater the randomness of the polarization degree change is. Moreover, the polarization-maintaining property of a circularly polarized light is better than that of a linearly polarized light. At the same concentration, the effects of linearly polarized light with different polarization angles on polarization state are not much different.
于婷, 战俊彤, 马莉莉, 鲍富成, 杨絮, 段锦, 姜会林. 椭球形粒子浓度对激光偏振传输特性的影响[J]. 中国激光, 2019, 46(2): 0208002. Ting Yu, Juntong Zhan, Lili Ma, Fucheng Bao, Xu Yang, Jin Duan, Huilin Jiang. Effect of Ellipsoidal Particle Concentration on Laser Polarization Transmission Characteristics[J]. Chinese Journal of Lasers, 2019, 46(2): 0208002.