Adaptive Phase Distortion Correction in Strong Speckle-Modulation Conditions
We introduce beam-quality metrics for adaptive wave-front control that permit estimation of the degree of laser beam energy concentration on a remotely located extended object based upon the backscattered wave intensity distribution at the receiver. A 37-control-channel adaptive optics system with phase correction of the output wave capable of operating in the presence of speckle-field-induced strong intensity modulation is presented. System operation is based on optimization of the speckle-field-based metric by the stochastic parallel gradient descent technique. Results demonstrate that adaptive wave-front correction using speckle-field-based beam-quality metrics can significantly improve laser beam concentration on extended objects.
Copyright © 2002, Optical Society of America
Optical Society of America
Vorontsov, Mikhail and Carhart, Gary W., "Adaptive Phase Distortion Correction in Strong Speckle-Modulation Conditions" (2002). Electro-Optics and Photonics Faculty Publications. 111.