Propagation characteristics of laser pointing in atmosphere environment

Aiming at the problem of pointing error of laser spot in atmosphere environment, in combination with the approximate integration on the refractiveindex fluctuations of the modified Von Karman spectrum model and the Hufngel-Valley turbulence profile model, the pulse broadening and scintillation index of Gaussian pulsed beam in the far-field horizontal and slant path propagation in the turbulent atmosphere are studied. The relation between the light intensity distribution and pulse broadening of 1.06 quasi-monochromatic laser beam propagating in the far-field strong atmospheric turbulence are analyzed. The comparison and validation of the numerical results are presented, which show that the critical parameters affecting the pointing error are the optical wavelength and propagation distance. Theoretical analysis and experiment results show that application of the laser spot whole-field data and analysis result in the available error compensation method can make effective compensation to the pointing error.The laser pointing error is A0.1mrad when the visibility of air in the range of 1km～3km.