Vol. 6, issue 12, article # 3

Abstract:

We propose a new approach to solving the problem on optimizing angular divergence of radiation which is based on calculations of the effective angular beam divergence from the data on distributions of the beam intensity and phase over the beam cross section directly at the exit from a nonlinear medium (an atmospheric layer) avoiding the use of a Fourier transform. It is shown in the paper that such an approach to the selection of a quality criterion makes the optimization much easier. Calculations of the optimal initial profile of a laser beam wave front made for a defocusing medium with the Kerr–type nonlinearity well agree with the data obtained using other techniques.