Accession Number : ADD014962

Title :   Compact Optical RF Spectrum Analyzer.

Descriptive Note : Patent, Filed 10 Jan 90, patented 25 Jun 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Lee, John N ; Verber, Carl M

Report Date : 25 Jun 1991

Pagination or Media Count : 11

Abstract : An improved compact optical and rugged laser-driven RF spectrum analyzer being made up of slab-like waveguide means. The waveguide means has at one end enhanced surface diffraction grating means for intercepting and selectively diffracting a laser source beam so that the diffracted laser beam is deflected, expanded and focussed to converge toward the other end and in relation to both a surface acoustic wave (SAW) and detector array means. The waveguide means includes novel combined signal detection and arcuate-shaped transducer (CSD/AT) means between its ends for forming and directing the SAW in response to a detected RF (microwave) signal to be analyzed such that the SAW optically intercepts, interacts and further diffracts in Bragg-Cell-like fashion that converging beam so as to deflect same relative to detector array means at the other end of the waveguide means. The detector array means normally analyzes a series of differently deflected beams so as to provide frequency distribution and intensity of one or more detected signals.

Descriptors :   ARRAYS, DETECTION, DETECTORS, DIFFRACTION, DISTRIBUTION FUNCTIONS, FREQUENCY, GRATINGS(SPECTRA), LASER BEAMS, SIGNALS, SOURCES, SURFACE ACOUSTIC WAVES, SURFACES, WAVEGUIDES

Subject Categories : Acoustics
      Optics
      Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE