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Fast Optical Limiters (OL) with Enhanced Dynamic Range

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-19-C-1738
Agency Tracking Number: F17A-029-0052
Amount: $749,972.00
Phase: Phase II
Program: STTR
Solicitation Topic Code: AF17A-T029
Solicitation Number: 17.A
Solicitation Year: 2017
Award Year: 2019
Award Start Date (Proposal Award Date): 2018-11-21
Award End Date (Contract End Date): 2020-11-21
Small Business Information
410 Jan Davis Drive
Huntsville, AL 35806
United States
DUNS: 625694500
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Neset Akozbek
 Senior Research Physicist
 (256) 922-0802
Business Contact
 Lindsey McMicken
Phone: (256) 922-0802
Research Institution
 University of Dayton
 Prof. Joseph W. Haus, Ph.D. Prof. Joseph W. Haus, Ph.D.
300 College Park
Dayton, OH 45469
United States

 (937) 554-3108
 Nonprofit College or University

Current fielded sensor protection is limited to fixed wavelength filters. Broadband filters designed to circumvent multi-wavelength laser threats are plagued by low transmittance, which degrades the sensitivity and performance of the sensor. Future warfighter threats include frequency agile lasers and thus have the potential of defeating fixed filters. Self-activating (passive) devices where protection is activated by the incoming radiation (optical limiting) are the best approach to counter frequency agile and short pulse laser threats. In our Phase I effort we demonstrated through experiment and simulations that the phase change material VO2 can be thermally managed to defeat future laser threats across the IR wavelength regime. In Phase II we will design, fabricate and test our optical limiter device and system concepts based on composite materials containing VO2 phase change material in the form of films and nanostructures embedded in a host. The novel optical limiter devices have large angular acceptance, large band width, nanosecond response times, high laser damage threshold, and short reset times. The materials are grown using physical deposition processes and devices could be made over large areas. The compact devices can be integrated into existing EO/IR sensors against laser threats.

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

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