Accession Number : ADB051694

Title :   Integrated Optical Circuits for RF Spectrum Analysis.

Descriptive Note : Interim rept. 3 Jul 78-3 Oct 79,

Corporate Author : HUGHES RESEARCH LABS MALIBU CA

Personal Author(s) : Ranganath, T. R. ; Joseph, T. R. ; Lee, J. Y.

Report Date : MAR 1980

Pagination or Media Count : 107

Abstract : The development of a feasibility model for an integrated optic real-time rf spectrum analyzer is reported. The integrated optic spectrum analyzer consists of an injection laser diode, a thin-film optical waveguide incorporated onto a substrate with geodesic lenses, a surface acoustic wave (SAW) transducer, and a linear detector array. Functionally, rf spectrum analysis is effected as follows. An incoming radar signal is down shifted to the appropriate bandwidth, amplified, and used to drive the SAW transducers. The resultant SAWs interact through the acoustooptic effect with a collimated optical beam resulting in Bragg-diffracted beams whose intensities are proportional to the power level and whose directions are uniquely related to the frequency composition of the rf signal. The diffracted beams are focused onto unique positions at the focal plane detector array resulting in the spectrum analysis. (Author)

Descriptors :   *INTEGRATED CIRCUITS, *OPTICAL CIRCUITS, *SPECTRUM ANALYZERS, RADIOFREQUENCY SPECTROSCOPY, REAL TIME, FEASIBILITY STUDIES, ELECTROACOUSTIC TRANSDUCERS, RADAR SIGNALS, OPTICAL PROCESSING, SIGNAL PROCESSING, OPTICAL WAVEGUIDES, THIN FILMS, INJECTION LASERS, ACOUSTOOPTICS, CHIRP FILTERS, FABRICATION, TEST METHODS.

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE