非球形介质的偏振激光传输特性实验研究

摘要

In this experiment,we use a new chemical method synthesis ellipsoidal non-spherical particle which a/b(horizontal and vertical ratio) is 1.6 and take this particle as the medium,produce different concentrations of non-spherical particles in the smog chamber by using the oil mist machine,with different wavelengths of laser(532 nm,671 nm) as the incident light under uniform conditions,through attenuation film,polarizer and 1/4 wave plate,and to rotate the polarizer to the incident light into 0°,45° and left-hand polarized light.The wavelength,incident angle and the volume concentration of the non-spherical medium are taken as variables,to study the change situation of degree of polarization (DOP),polarization angle (AOP) and intensity(Ⅰ),obtain the variation law of polarization transmission characteristics and the pros and cons in performance of guaranteed degree of polarization,provide data and theory for the research on the properties of the non-spherical.%实验用一种新的化学方法合成了a/b(横纵比)1.6的椭球形非球形粒子,且以这种粒子为介质,通过油雾机在烟雾箱里产生不同浓度的非球形粒子,在均匀条件下分别以不同波长的激光(532 nm,671 nm)为入射光,透过衰减片、偏振片和1/4波片,并以旋转偏振片的方式使入射光变为0°,45°和左旋偏振光.分别以波长,入射角,非球形介质体积浓度为变量,研究偏振度(DOP)、偏振角(AOP)和光强(Ⅰ)的变化情况,得到了偏振传输特性的变化规律以及保偏性能的优劣,对非球形介质的偏振传输特性的研究提供了数据和理论支持.