2015/04/14 by Alexander Rudy, Lisa Poyneer, Rudy, Alexander +7
Physics and Astronomy · #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Optics (physics.optics) #astro-ph.IM #physics.optics
paper · pdf · doi:10.48550/arxiv.1504.03686
17 pages, 10 figures, Submitted to Optics Express
arxiv created 2015/04/14 · arxiv updated 2015/04/16
We present the laboratory verification of a method for re- moving the effects of frozen-flow atmospheric turbulence using a Linear Quadratic Gaussian (LQG) controller, also known as a Kalman Filter. This method, which we term "Predictive Fourier Control," can identify correlated atmospheric motions due to layers of frozen flow turbulence, and can predictively remove the effects of these correlated motions in real-time. Our laboratory verification suggests a factor of 3 improvement in the RMS residual wavefront error and a 10% improvement in measured Strehl of the system. We found that the RMS residual wavefront error was suppressed from 35.0 nm to 11.2 nm due to the use of Predictive Fourier Control, and that the far field Strehl improved from 0.479 to 0.520.