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Proceedings Paper

Scintillation compensation for laser beam projection using segmented deformable mirrors
Author(s): Michael C. Roggemann; Shilan Deng
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Paper Abstract

A two deformable mirror concept for correcting scintillation effects in laser beam projection through the turbulence atmosphere has been previously studied. This system uses a deformable mirror and a Fourier transforming mirror to adjust the amplitude of the wave front in the telescope pupil. A second deformable mirror is used to correct the phase of the wave front before it leaves the aperture. The phase applied to the deformable mirror used for controlling the beam amplitude is obtained using a technique based on the Fienup phase retrieval algorithm. In the earlier work pointwise control of the wave front phase was assumed. In this paper we explore the consequences of using realistic finite degree of freedom segmented deformable mirrors to implement the two deformable mirror-based scintillation compensation technique. Our results show that under nearly all conditions of interest single deformable mirror branch point-based phase reconstruction provides equal or superior performance in this laser beam projection paradigm.

Paper Details

Date Published: 5 October 1999
PDF: 12 pages
Proc. SPIE 3763, Propagation and Imaging through the Atmosphere III, (5 October 1999); doi: 10.1117/12.363624
Show Author Affiliations
Michael C. Roggemann, Michigan Technological Univ. (United States)
Shilan Deng, Michigan Technological Univ. (China)

Published in SPIE Proceedings Vol. 3763:
Propagation and Imaging through the Atmosphere III
Michael C. Roggemann; Luc R. Bissonnette, Editor(s)

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