Title :
A robust continuous-time multi-dithering technique for laser communications using adaptive optics
Author :
Loizos, Dimitrios N. ; Sotiriadis, Paul P. ; Cauwenberghs, Gert
Author_Institution :
Dept. of Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD
Abstract :
A robust system architecture to achieve optical coherency in multiple-beam free-space laser communication links with adaptive optics is introduced. It is based on deterministic multi-dithering and gradient descent flows and accounts for phase delays in the dither signal, during propagation in the atmosphere, as well as saturation of the optical phase shifters. The architecture has been mathematically analyzed and simulation results of a VLSI implementation of the architecture are presented and found in agreement with the theoretical model
Keywords :
VLSI; adaptive optics; light coherence; optical links; optical phase shifters; VLSI implementation; adaptive optics; continuous-time multidithering; free-space laser communications links; optical phase shifters; phase delays; Adaptive optics; Analytical models; Atmosphere; Atmospheric modeling; Image motion analysis; Optical propagation; Optical saturation; Phase shifters; Propagation delay; Robustness;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693412
