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Broadband Optical Attenuator via Amplified Free Carrier Absorption

Award Information
Agency: Department of Defense
Branch: Army
Contract: W911NF-22-P-0051
Agency Tracking Number: A21C-T007-0108
Amount: $172,940.00
Phase: Phase I
Program: STTR
Solicitation Topic Code: A21C-T007
Solicitation Number: 21.C
Solicitation Year: 2021
Award Year: 2022
Award Start Date (Proposal Award Date): 2022-08-01
Award End Date (Contract End Date): 2023-01-31
Small Business Information
20 New England Business Center
Andover, MA 01810-1111
United States
DUNS: 073800062
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 David Woolf
 (978) 738-8132
Business Contact
 William Marinelli
Phone: (978) 738-8226
Research Institution
 Boston University
 Oldeta Shore
110 Cummington Mall
Boston, MA 02215-2407
United States

 (617) 353-0092
 Nonprofit College or University

The blinding or disabling of focal plane arrays (FPAs) can greatly impair situational awareness for the warfighter. Some passive technologies, such as filters, can selectively remove certain wavelengths if those wavelengths are known to be threats, but there exists a need for a technology that can 1) attenuate 99.9% of high intensity light in a localized region within the viewing area, 2) perform this task at a wavelength that is also of interest to the viewer/camera, and 3) perform this task when the threat wavelength is unknown or tunable. To that end, PSI has developed a technology that uses a novel approach to optical limiting that uses amplified free carriers to attenuate more than 99.9% of a high power incident pulse. An individual device can protect against unknown threats across a broad bandwidth (e.g. the full visible) and the concept can be designed to operate in the visible, near infrared and short wave infrared bands, while exhibiting high transmission in the absence of high-intensity threats.

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

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