title: Optimization of adaptive-optics systems closed-loop bandwidth settings to maximize imaging-system performance.
abstract: 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.
authors.forename: R T
authors.initials: RT
authors.lastname: Brigantic
authors.forename: M C
authors.initials: MC
authors.lastname: Roggemann
authors.forename: B M
authors.initials: BM
authors.lastname: Welsh
authors.forename: K W
authors.initials: KW
authors.lastname: Bauer