Smart adaptive optical system for correcting the laser wavefront distorted by atmospheric turbulence

Abstract

An adaptive optical system is developed to correct the wavefront of laser radiation distorted by a turbulent air flow. The use of a field-programmable gate array as the main control element makes it possible to achieve a system bandwidth of 2 kHz. The results of experiments on dynamic correction of the phase of a laser beam distorted by a flow of heated air are presented and analysed.

Adaptive optics for Cr:CdSe laser with a moving active element

“…A 31-element bimorph adaptive mirror has been used in calculations to correct wavefront distortions [5]. Figure 3 shows its characteristic response functions.…”

Development of an adaptive optical system for stabilizing laser radiation and correcting its turbulent distortions

“…A set of control signals for a mirror simulating Tip-Tilt tilts can be formed both from the results of trace measurements and using a numerical model of beam image jitter in the focal plane and suggests the possibility of repeated repetition of emulated beam distortions. Atmospheric turbulence emulation is actually a special tool that allows you to solve actual problems of creating optical systems, debugging them and studying the technical characteristics of elements of optical systems, as well as developing adaptive correction algorithms [13].…”

Emulation of atmospheric turbulence for image stabilization of laser radiation on the stand of adaptive optical system

“…Under real conditions, the repeatability of atmospheric parameters on open paths is low. To study the characteristics of adaptive optical systems [14,15], we used mathematical modeling and open atmospheric paths [16].…”

“…Also, the computer through the electric heating elements control unit (13) ensures the formation of thermal air flows over the electric heating elements (6,11,21,27) and their intensity to create the required turbulence in the optical beams. The computer through the control units (14,15,16) programmatically sets the tilts of the deflector mirrors (9,8,17), forming the tilt angles of the wave front of the corresponding beams.…”