Laser Beam Wavefront Model Analysis

Abstract

The paper evaluates the nature of the change in the wavefront surface curvature in the initial position, which is formed at the exit pupil of the optical system located directly behind the last refractive surface. To solve the problem, an experimental setup has been developed, consisting of a semiconductor laser and an aberration optical system with a mechanism for moving screens. The arrangement of the optical system with a radiation source at a given limiting parameter causes an increase in the action of wave aberration, which ensures the redistribution of the intensity in the transverse section of the converted laser beam. The center of the diaphragm and the mark on the screen are located on the same axis, which coincides with the axis of the converted laser beam. A functional dependence was obtained between the inclination angle of the normal to the converted laser beam axis of the interference structure on the radial location of the normal intersection point with the wavefront surface relative to the axis laser beam. Based on the use of modern optical systems technologies, the problems of changing the spatial-geometric parameters of the laser beam and obtaining a measuring system using the proposed parameter of the interference structure in the cross section of the laser beam are analyzed.