Accession Number : ADD008988

Title :   Three & Four Product Surface-Wave Acousto-Optic Time Integrating Correlators.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Abramovitz,Irwin J ; Berg,Norman J ; Casseday,Michael W

Report Date : 02 Nov 1981

Pagination or Media Count : 18

Abstract : 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.

Descriptors :   *Patent applications, *Optical correlators, *Acoustooptics, *Signal processing, Spread Spectrum, Receivers, Diffraction analysis, Optical circuits, Surface waves, Broadband, Piezoelectric transducers, Lithium niobates

Subject Categories : Line, Surface and Bulk Acoustic Wave Devices
      Acoustooptic and Optoacoustic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE