Fast-Fourier-transform-based simulators of atmospheric wave fronts with a von Kármán turbulence spectrum were tested with reference to the phase-structure function and phase variance over a pupil on large square and rectangular formats. The symmetry and the accuracy of the phase-structure function were found to be limited by the aspect ratio and the size of the phase screen. The phase variance over a pupil is less sensitive to the aspect ratio than the phase-structure function and is dependent mainly on the size of the phase screen. Several tests are reported and discussed together with a method of compensation for the negative effects of rectangular formats.
© 1998 Optical Society of America
Giorgio Sedmak, "Performance Analysis of and Compensation for Aspect-Ratio Effects of Fast-Fourier-Transform-Based Simulations of Large Atmospheric Wave Fronts," Appl. Opt. 37, 4605-4613 (1998)