ITERATIVE TECHNIQUE FOR HIGH-RESOLUTION PHASE-DISTORTION COMPENSATIONIN ADAPTIVE INTERFEROMETERS

High-resolution adaptive phase distortion suppression is experimentall y demonstrated for laser interferometers using a liquid crystal televi sion as a phase modulator and an optoelectronic feedback loop, The exp eriments are carried out for both amplitude division (Mach-Zehnder) an d rotational shear types of interferometers. The suggested iterative c ontrol algorithm is based solely on interference pattern information. The results of numerical simulations of a high-resolution adaptive sys tem based on rotational shear type interferometers show the system's p otential for atmospheric turbulence phase distortion suppression. (C) 1997 Society of Photo-Optical Instrumentation Engineers.