Thermal Blooming During Wind Turbulence, Numerical Model of Adaptive-OpticsSystems, and Trichroic Beam Splitter for Deuterium Fluoride Chemical Lasers.(Selected Articles)

摘要

There are various favorable and unfavorable effects on laser beam transmissiondue to atmospheric conditions, mainly in variable wind force and variable direction relative to height in the atmosphere, such as random up-and-down motion of wind and turbulence in the atmosphere. Usually, winds are favorable to restrain thermal blooming; however, atmospheric turbulence mainly leads to the effect of beam expansion, and reduced beam coherence. The paper presents various wind models. Turbulence is simulated with multiphase shield, with the application of the Kolmogorov spectrum. In section II, fundamental equations are given. In section III, the selection principle of time and space step lengths are discussed. In section IV, the results of calculations are listed along with a brief analysis. In section V, several conclusions are provided in the stages of the study. p3 4.