J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 645-648
Large-aperture deformable mirror correction of tiled-grating wavefront errorB.E. Kruschwitz, R. Jungquist, J. Qiao, S. Abbey, S.E. Dean, D.N. Maywar, M.D. Moore, L.J. Waxer and M.E. Wilson
Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, NY 14623, USA
When tiling three gratings, with each individually exhibiting astigmatism and power due to holographic errors and coating stress, the resulting wavefront aberrations contain high-frequency components as well as the fundamental frequency, which is nearly three cycles across the aperture in the tiling direction. A deformable mirror (DM) that was designed to compensate for much slower errors (e.g., those arising from distortion in amplifier disks) is being used to compensate for this tiling-induced error. This investigation studies the effectiveness of compensating only the fundamental frequency of the tiled aberration, and shows that this provides a significant improvement that is adequate for a range of expected aberrations. Limitations of the DM correction technique are also studied.
© EDP Sciences 2006