HYPERSOUND FROM ELECTROSTRICTIVE BEATING OF LONGITUDINAL LASER MODES.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1968
- Accession Number
- AD0838855
Entities
People
- Norval Leon Wardle
Organizations
- Naval Postgraduate School