Laser Beam Propagation In The Atmosphere Pdf

Based on the thin window model the analytical propagation formulae are derived by using the quadratic approximation of the nonlinear phase shift.

Laser beam propagation in the atmosphere pdf.

The characteristics of high power partially coherent laser beams propagating upwards in the turbulent atmosphere are studied where the principal features of diffraction nonlinear self focusing and turbulence are considered. Laser beam propagation in the atmosphere. In papers by fleck morris and feit 2 kandidov and ledenev 3 and konyaev 4 the method of spectral samples was used to generate 2d random phase screens in the problem of propagation of a coherent beam through a randomly inhomogeneous medium and in particular for estimating the efficiency of phase correction of atmospheric distortions. John carl leader this item is only available on the spie digital library.

The methods are applicable to the propagation of high energy laser beams through the atmosphere in the presence of a horizontal wind and turbulence for most situations of interest. Laser beam propagation in atmosphere the topic of laser propagation in atmosphere is a subtopic of a more general problem the propagation of waves in turbulent medium. High flux propagation through the atmosphere. The computation of time dependent three space dimensional laser beam propagation is described.

In this paper propagation of a gaussian laser beam through turbulent atmosphere is evaluated numerically. Laser beam propagation in the atmosphere. The propagation of high energy laser hel beams in the atmosphere is rich in fundamental physics and of paramount importance to the navy s directed ener gy research program. Mcaulay generating 2000 kolmogorov phase screens for modeling.

The beam quality factor for the propagated beam has been estimated for different turbulent conditions that are characterized by parameter c n the calculations show that the beam quality can be affected dramatically by atmospheric turbulence and the laser beam size and wavelength have. 12 july 1983 table of contents show all abstracts hide all abstracts. Possible cases are propagation of cw beams through stagnation zones multi pulse propagation including the self. All laser systems which involve propagation of the laser beam over a path of several kilometres through the atmosphere usually experience a degradation of their performance due to a variety of natural causes such as the gaseous and particulate constituents fog snow rain and atmospheric turbulence.

Strohbehn 1978 laser beam propagation in the atmosphere springer verlag berlin heidelberg new york 11 41.