Laser Light Scattering Of Aerosol Particles On Laser Radar Performance Impact

The scattering characteristic of aerosols to laser is critical to laser radar system. The scattering could seriously lower the performance of laser radar in high density aerosols regions. In this dissertation, the laser scattering characteristic of aerosols is investigated in detail based on the interaction of laser with spherical, non-spherical aerosol particles. We focus on the following four themes:(1) The interaction of laser with single spherical particle. In the light of the classical Mie's theory on atmospheric transmission for laser, based on the written program, the laser scattering characteristic of aerosols is studied.(2) The interaction of laser with single non-spherical particle. Up to now, there are several kinds of theory to treat the laser scattering of non-spherical aerosols for different shapes, different refraction index and different composition of matter. Based on the DDA and T-matrix methods, the laser scattering of elliptical shape of aerosol particle is researched.(3) The effect of the scattering of aerosol particles to laser on the polarization is investigated on the base of the Muller matrix and on the research of the Mie's theory about the laser scattering of spherical particles.(4) A dynamic model on the laser transmission in atmosphere is constructed based on the empirical formula on scattering of atmosphere to laser in MATLAB/Simulink workspace to simulate the dynamic characteristic of laser transmission in atmosphere.The research on the laser scattering of single spherical, non-spherical aerosol particles is actually the initial step on the interaction of laser with aerosols. Our study is only the start for the discussion on the influence of the performance of laser scattering of aerosol particles. Our aim, on one hand is to get some theoretical knowledge for our ongoing laser radar system, on the other hand, is also try to find the physical nature of the interaction of laser with aerosol particles, as well as to explore the applications of laser radar in atmosphere detection fields.