We present the results of research aimed at optimizing adaptive-optics closed-loop bandwidth settings to maximize imaging-system performance. The optimum closed-loop bandwidth settings are determined as a function of target-object light levels and atmospheric seeing conditions. Our work shows that, for bright objects, the optimum closed-loop bandwidth is near the Greenwood frequency. However, for dim objects without the use of a laser beacon the preferred closed-loop bandwidth settings are a small fraction of the Greenwood frequency. In addition, under low light levels selection of the proper closed-loop bandwidth is more critical for achieving maximum performance than it is under high light levels. We also present a strategy for selecting the closed-loop bandwidth to provide robust system performance for different target-object light levels.
© 1998 Optical Society of America
Robert T. Brigantic, Michael C. Roggemann, Byron M. Welsh, and Kenneth W. Bauer, "Optimization of Adaptive-Optics Systems Closed-Loop Bandwidth Settings to Maximize Imaging-System Performance," Appl. Opt. 37, 848-855 (1998)