G - Physics – 02 – F
Patent
G - Physics
02
F
343/104, 345/58
G02F 1/33 (2006.01) G01S 3/74 (2006.01) G02F 1/01 (2006.01) H01Q 3/26 (2006.01)
Patent
CA 1302549
ABSTRACT An interferometric acoustooptic signal processor utilizing a modified multi-channel Bragg cell comprised of a plurality of sets of acoustic transducers. Each set of transducers is arranged in a phased array for receiving input microwave signals from respective ones of a plurality of antennae, and applying the received signals to a block of acoustooptic material, resulting in generation of one or more acoustic waves therein. A laser beam is used to illuminate the Bragg cell and is modulated due to interaction with the acoustic waves, resulting in diffraction of the laser beam and generation of a diffracted beam pattern output from the Bragg cell. A Fourier transform lens focuses the diffracted laser beam on a back focal plane at a point characterized by two perpendicular coordinates designating the input signal power spectrum and the angle of incidence in relation to the antennae, respectively. By utilizing a set of transducers arranged in a phased array for each antenna, a large portion of the incident laser power is utilized constructively to increase the total amount of light diffracted, thereby improving signal reception and processing efficiency.
561917
Her Majesty The Queen In Right Of Canada As Represented By The M
Lee Jim P.
Pascal & Associates
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