Three & Four Product Surface-Wave Acousto-Optic Time Integrating Correlators.
DEPARTMENT OF THE ARMY WASHINGTON DC
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This abstract discloses a method and device for processing spread-spectrum and other wideband communications and radar signals to obtain three and four product correlated signals. A laser beam is split and shaped into first and second sheet beams. The first beam is directed to a first acousto-optic medium where it is doubly diffracted by first and second signals. The second beam is directed to a second acousto-optic medium which is spatially rotated 90 degs relative to the first acousto-optic medium where the second sheet beam is either singly diffracted by a third signal or doubly diffracted by a third signal and a fourth signal. The diffracted sheet beams are shaped into square beams, combined and directed to a photodiode area array.
- Line, Surface and Bulk Acoustic Wave Devices
- Acoustooptic and Optoacoustic Devices