针对大气环境中粒子浓度对激光传输过程的影响问题,以油雾粒子为研究对象,利用油雾粒子在扩散过程中产生的非均匀环境,进行了偏振激光传输的半实物仿真实验.实验采用532 nm激光器,分别研究了水平线偏振光、45°线偏振光以及左旋圆偏振光在油雾扩散过程中偏振态的变化情况.利用粒度仪对扩散环境进行了量化标定.实验结果表明:在油雾扩散过程中,浓度越高,偏振度变化的随机性越大,圆偏振光的保偏性优于线偏振光.在相同浓度下,0°线偏振光对偏振态的保持性要优于45°线偏振光.在浓度极高的情况下,体积浓度为2 m g/L及其以上时,线偏振光与圆偏振光的保持性趋向一致.%Aiming at the influence of particle concentration on the laser transmission process in the atmospheric environment ,taking the oil mist particles as the research object ,the semi-phys-ical simulation experiment of polarization laser transmission was carried out by using the inho-mogeneous environment generated by the oil mist particles during the diffusion process .In the experiment ,532 nm lasers were used to study the polarization state variation of horizontal line-arly polarized light ,45° linearly polarized light and left circularly polarized light during oil mist diffusion .The diffusion environment was quantitatively calibrated using the particle size analy-zer .The experimental results show that the higher the concentration is ,the greater the random-ness of the change of polarization ,and the polarization-maintaining ability of the circularly polarized light is better than that of the linearly polarized light .At the same concentration ,the polarization-main-taining ability of 0° linearly polarized light is better than 45 ° linearly polarized light .In the case of ex-tremely high concentrations ,when the volume concentration is 2 mg/L or above ,the linearly polarized light tends to coincide with the retention of circularly polarized light .
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