Adaptive Optics Compensation in Deep Atmospheric Turbulence

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$99,928.00
Award Year:
2008
Program:
SBIR
Phase:
Phase I
Contract:
FA9451-08-M-0034
Agency Tracking Number:
F073-002-0755
Solicitation Year:
2007
Solicitation Topic Code:
AF073-002
Solicitation Number:
2007.3
Small Business Information
MZA ASSOC. CORP.
2021 Girard SE, Suite 150, Albuquerque, NM, 87106
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
794350025
Principal Investigator:
AaronMasino
Senior Scientist
(561) 747-6881
amasino@mza.com
Business Contact:
Ted Cunion
CFO
(505) 245-9970
cunion@mza.com
Research Institution:
n/a
Abstract
Adaptive optics (AO) compensation of deep atmospheric turbulence remains a significant obstacle to the deployment of laser beam projection and imaging systems for a many applications. Tactical high-energy laser (HEL) weapon systems will be particularly limited by inadequate AO schemes as they will often be required to operate in engagement scenarios encountering deep turbulence. AO systems that employ a Shack-Hartmann WFS are particularly hampered in strong turbulence due to the presence of branch cuts in the sensed phase function. MZA proposes to investigate a novel multi-conjugate AO system concept, model a prototype in a tactical HEL weapon system context, and evaluate its performance in strong turbulence via wave-optics and experimentation. The concept, named SIRCAO, utilizes an SPGD driven DM conjugate to a location along the propagation path and a second DM, conjugate to the pupil plane, driven by WFS outputs, where the WFS is a Shack-Hartmann or SRI. Beyond HEL cleanup, the SPGD DM provides an intensity remapping of the BIL return before it is sensed by the WFS by applying a phase change and then reimaging. This reduces branch cuts in the phase and allows for significant performance increase of the WFS and the overall system.

* information listed above is at the time of submission.

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