Formation, propagation, and focusing of acoustic beams in oceanic waveguides: Simulation of processes

A quasi-optic theory developed in [1] for describing the propagation and focusing of multimode acoustic beams in oceanic waveguides smoothly inhomogeneous along the track is generalized with the use of the adiabatic approximation. Analytical calculation and numerical simulation are carried out for the corresponding processes using the simplest model of a surface channel that is homogeneous along the track with a linear dependence of the squared refraction index on depth. The results confirm the validity of the laws established in [1].