Switched-Grating Devices for Phased Array Radar Applications

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 26076
Amount: $721,030.00
Phase: Phase II
Program: SBIR
Awards Year: 1995
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Wavefront Research, Inc.
P.o. Box 20527, Lehigh Valley, PA, 18002
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Thomas W. Stone
 (610) 974-8977
Business Contact
Phone: () -
Research Institution
Novel true-time-delay optical beamforming networks for phased array antennas are devised using nonlinear high efficiency grating technology for free space switches. The switchable gratings are formed using nonlinear volume phase diffraction grating composites. The resulting optical time delay networks include both addressable free space delay lines and uniform delay switching fabrics to route optical channels through desired members of an array of guided wave optical delay devices. An additional nonlinear device is added that selectively absorbs weak signals that leak through nonselected channels due to imperfect diffraction efficiency, scatter, etc. while transmitting the signal in the selected path with minimal attenuation. After refining initial device designs, a computer model of these devices is constructed using volume diffraction and nonlinear optics theory. A prototype network is designed and the model is used to demonstrate feasibility of the concept and design. Experiments are included to study improved material systems. Resulting networks are expected to possess advances in switch isolation (thus lower signal distortion) and insertion loss (yielding greater radar dynamic range). Government markets include radar beamforming networks and private sector opportunities exist for the technology as reconfigurable interconnects.

* information listed above is at the time of submission.

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