Accession Number : AD0838855

Title :   HYPERSOUND FROM ELECTROSTRICTIVE BEATING OF LONGITUDINAL LASER MODES.

Descriptive Note : Doctoral thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Wardle, Norval Leon

Report Date : JUN 1968

Pagination or Media Count : 64

Abstract : A new method for generating pulses of hypersound by electrostrictive beating of two coherent light beams has been demonstrated. Three new procedures for generating the two required beams with a precise and predictable difference between their frequencies have been experimentally investigated. In the most practical of these a giant pulse ruby laser was forced to emit light at two frequencies. Techniques to control the difference between the two frequencies have been developed which depend solely upon the locations of the standard laser components and the spacings between the several glass flats which serve as one end mirror. The two laser beams have been intersected in flint glass to beat electrostrictively and produce intense, pulsed acoustic beams at 500 megahertz. The value of the method lies in its potential of producing much higher intensities and frequencies than do the conventional piezoelectric transducers. (Author)

Descriptors :   (*BEAMS(ELECTROMAGNETIC), DOPPLER EFFECT), (*LASERS, ULTRASONIC RADIATION), SCATTERING, ACOUSTICS, INTERACTIONS, RESONANCE, COHERENT RADIATION, THEORY, FREQUENCY SHIFT, DIFFRACTION, TEMPERATURE CONTROL, ELECTRIC FIELDS, RUBY, GAS LASERS, THESES.

Subject Categories : Lasers and Masers
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE