Subaperture Adaptive Optics for directed energy phased arrays

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA9451-13-M-0065
Agency Tracking Number: F12B-T13-0079
Amount: $149,988.00
Phase: Phase I
Program: STTR
Awards Year: 2013
Solicitation Year: 2012
Solicitation Topic Code: AF12-BT13
Solicitation Number: 2012.B
Small Business Information
1341 South Sunkist Street, Anaheim, CA, -
DUNS: 801256199
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 David Mann
 Senior Research Scientist
 (714) 772-7668
Business Contact
 Glenn Tyler
Title: President
Phone: (714) 772-7668
Research Institution
 Air Force Institute of Technology
 Ashley Ungericht
 2950 Hobson Way
Bldg. 640 Rm 213
WPAFB, OH, 45433-
 (937) 255-3636
 Nonprofit college or university
ABSTRACT: The proposed research will develop a method of compensating atmospheric disturbances in the transmitting subapertures of a phased array transceiver operating in the infrared. The aero-optical boundary layer and atmospheric turbulence create phase variations within each subaperture. To compensate these variations, an adaptive optical system will be used in each subaperture. The proposed wavefront sensor is a self-referencing interferometer, and the corrective element is a liquid crystal adaptive optic or other device suitable for use in phased arrays. The beacon for the wavefront sensor is the coherent high energy spot reflected from the target of the phased array. The main innovation in the proposed research consists of techniques to mitigate the corruption in the beacon phase caused by speckle, and other related difficulties associated with using the reflected spot as a beacon. The speckle phase that the phasing system estimates will be used to compensate the speckle phase in the adaptive optics system. BENEFIT: The primary product of this research will be the conceptual design of an adaptive optical (AO) system suited for use in phased array transceivers. This system will be available in future phased array design work to improve the performance of phased arrays as needed. The adaptive optical system will not depend on a particular phased array architecture, but will be available for use with a wide variety of architectures. The primary capability of the AO system will be in correcting the aero-optical boundary layer for airborne phased arrays. The use of the AO system also allows for more efficient configurations of the beam phasing system.

* Information listed above is at the time of submission. *

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