Accession Number : ADD010622

Title :   Acoustic Degenerate Four-Wave Mixing Phase-Conjugate Reflector.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Shockley,R C

Report Date : 25 Jun 1981

Pagination or Media Count : 6

Abstract : An acoustic surface wave device is disclosed for generating an output signal that is the phase-conjugate of the input signal to the device. Disposed on the piezoelectric substrate is a first interdigital transducer for receiving a modulated input signal having a carrier center frequency f1 and for converting the input signal to an input acoustic wave. A semiconductor material is disposed over the surface of the piezoelectric substrate. A second interdigital transducer is disposed on the surface of the piezoelectric substrate between the first interdigital transducer and the semiconductor material. A standing wave at frequency f1 is generated by counterpropagating pump waves in the nonlinear acoustic wave interaction region in the area of the semiconductor material. The modulated input acoustic wave interacts with the counterpropagating pump waves in the nonlinear interaction region to generate an output signal on the output of the second interdigital transducer that is the phase-conjugate of the input signal. (Author)

Descriptors :   *Patents, *Surface acoustic wave devices, *Acoustic equipment, Nonlinear systems, Surface waves, Semiconductors, Acoustic waves, Piezoelectric materials, Standing waves, Propagation, Substrates, Input, Signals, Output, Modulation, Materials, Interactions, Reflectors, Transducers, Regions

Subject Categories : Line, Surface and Bulk Acoustic Wave Devices
      Cybernetics
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE