Two deformable mirror concept for correcting scintillation effects in laser beam projection

Michael C. Roggemann; David J. Lee

doi:10.1117/12.323926

8 September 1998 Two deformable mirror concept for correcting scintillation effects in laser beam projection

Michael C. Roggemann, David J. Lee

Proceedings Volume 3381, Airborne Laser Advanced Technology; (1998) https://doi.org/10.1117/12.323926
Event: Aerospace/Defense Sensing and Controls, 1998, Orlando, FL, United States

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.

Citation Download Citation

Michael C. Roggemann and David J. Lee "Two deformable mirror concept for correcting scintillation effects in laser beam projection", Proc. SPIE 3381, Airborne Laser Advanced Technology, (8 September 1998); https://doi.org/10.1117/12.323926

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