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Proceedings Paper

Two deformable mirror concept for correcting scintillation effects in laser beam projection
Author(s): Michael C. Roggemann; David J. Lee
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Paper Abstract

A two deformable mirror concept for correcting scintillation effects in laser beam projection through the turbulent atmosphere is presented. This system uses a deformable mirror and a Fourier transforming mirror to adjust the amplitude of the wave front in the telescope pupil, similar to kinoforms used in laser beam shaping. 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. Simulations of propagation through a single turbulent layer sufficiently distant from the beacon observation and laser beam transmission aperture to cause scintillation shows that, for an ideal deformable mirror system, this field conjugate approach improves the on-axis field amplitude by a factor of approximately 1.4 to 1.5 compared to a conventional phase-only correction system.

Paper Details

Date Published: 8 September 1998
PDF: 10 pages
Proc. SPIE 3381, Airborne Laser Advanced Technology, (8 September 1998); doi: 10.1117/12.323926
Show Author Affiliations
Michael C. Roggemann, Michigan Technological Univ. (United States)
David J. Lee, Air Force Research Lab. (United States)


Published in SPIE Proceedings Vol. 3381:
Airborne Laser Advanced Technology
Todd D. Steiner; Paul H. Merritt, Editor(s)

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