中国光学2021，Vol.14Issue(2)：409-417,9.DOI:10.37188/CO.2020-0095
斜程湍流大气中部分相干艾里光束的偏振特性研究
Polarization changes of partially-coherent Airy-Gaussian beams in a slanted turbulent atmosphere
摘要
Abstract
Investigating polarization changes in a turbulent atmosphere holds great significance because po-larization is one of the most important parameters in laser communication. Based on the extended Huygens-Fresnel principle and the unified theory of coherence and polarization, an analytical expression for the de-gree of polarization (DoP) in partially-coherent Airy-Gaussian beams propagating in a slanted turbulent at-mosphere is derived. It is then used to study the dependence of polarization changes in turbulent parameter, coherence length, zenith angle, truncation and distribution factor. The polarization between the slanted and horizontal paths is also compared. Compared with horizontal turbulence, the beams traverse a longer dis-tance to recover their initial polarization in slanted turbulence. An increase in the zenith angle, receiving height and truncation factor, or a decrease in the coherence length can increase the DoP. A smaller distribu-tion factor or a higher coherence length is beneficial to reducing the effect of the zenith angle on the polariza-tion. Analysis of the influence of the distribution factor on polarization also shows that maintaining the polar-ization of a Gaussian beam with higher coherence in a horizontally turbulent atmosphere has a greater ad-vantage to that of a pure Airy beam from the view of keeping polarization invariance. The results show that optical information encoding can be achieved by selecting appropriate parameters, which is useful for study-ing atmospheric communication.关键词
偏振度/艾里高斯光束/湍流大气/传输Key words
degree of polarization/airy-gaussian beams/turbulent atmosphere/propagation分类
信息技术与安全科学引用本文复制引用
程科,卢刚,朱博源,舒凌云..斜程湍流大气中部分相干艾里光束的偏振特性研究[J].中国光学,2021,14(2):409-417,9.基金项目
四川省科技计划资助项目(No. 2020YJ0431)Supported by Sichuan Science and Technology Program (No. 2020YJ0431) （No. 2020YJ0431）
