Accession Number : ADA311772

Title :   Photonic Time Delay Beamforming for Aegis Radar.

Descriptive Note : Quarterly progress rept. no. 3, Nov 95-Jan 96,

Corporate Author : UNIVERSITY OF CENTRAL FLORIDA ORLANDO

Personal Author(s) : Riza, Nabeel A.

PDF Url : ADA311772

Report Date : 12 FEB 1996

Pagination or Media Count : 4

Abstract : CREOL moved into its dedicated $20M facility on the campus of the University of Central Florida. Dr. Riza established CREOL's first Photonic Information Processing Systems Laboratory in the new CREOL Building. CREOL has made good progress on experimentally evaluating the fiber optic interconnect issued related to our Aegis photonic beamformer. In particular, we have experimentally evaluated the use of fiber to flber optical coupling using single mode fibers, GRIN rod lenses, and imaging lenses. Previously, we experimentally showed that an inter-fiber gap distance of 5 cm or less is necessary to prevent high (e.g. 5 dB or higher) optical loss when no loss preventing optics is used between the fibers. Our new experiments using imaging lenses between the fiber ports demonstrate the key factors that are important for reducing coupling loss. Main experimental conclusions are outlined in report. CREOL has also starting looking at the fiber array design and packaging issues. Using GRiN-fiber lenses, we have concluded that a hexagonal array geometry for fiber packing provides the highest channel packing density. Lockheed-Martin Lab-Syracuse has recently provided CREOL with preliminary Navy Aegis radar time delay unit electrical specs. We are developing the optical specs based on that data.

Descriptors :   *FIBER OPTICS, *CIRCUIT INTERCONNECTIONS, COUPLING(INTERACTION), ARRAYS, BEAM FORMING, HIGH DENSITY, RADAR SIGNALS, OPTICAL CIRCUITS, PACKING DENSITY, CHANNELS, LENSES.

Subject Categories : Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE