Estimation and display for far-field energy density distribution of laser spot

Abstract

Due to the interaction between atmospheric molecules and particles of aerosols, attenuation and turbulence of atmospheric is appeared in the process of laser transmission. Far-field energy density distribution is severe affected in this process. We have designed the testing system of laser far-field energy density distribution. The actual outfield experiment was carried out based on our testing system. But the data and the laser spot image were obtained only in a given distance in ours experiment. In order to get laser transmission characteristics in arbitrary position, the effect of atmospheric transmission is studied in this paper now. While the data of energy distribution and spot image in a given distance is acquired, the energy density distribution in arbitrary position is estimated by compute, analysis and simulation. Pseudo-color transforms makes 256 gray-scale image of the laser spot changes into the continuous pseudo-color image. Spot energy density distribution is shown by the technology in different regions of image.