Development of Adaptive Optics Methods for Correcting Laser Radiation Distortions on Long Horizontal Atmospheric Paths

An adaptive optical system for correction of laser radiation distortions on a long atmospheric path in real time is presented. The system includes an atmospheric turbulence emulator and a circuit for the forward correction of laser beam tilt angle errors caused by the delay of the tip-tilt correcting mirror. The forward error correction (FEC) algorithms are tested based on the numerical analysis of measurements performed by the Shack –Hartmann wavefront sensor.