Accession Number : AD0756778

Title :   Probing of Acoustic Shear Wave Radiation in Surface Wave Devices,

Corporate Author : TORONTO UNIV (ONTARIO)

Personal Author(s) : Ristic,V. M. ; Zuliani,M. ; Stegeman,G. ; Vella,P.

Report Date : 28 MAR 1972

Pagination or Media Count : 4

Abstract : Simultaneous Rayleigh and shear wave generation has been achieved using interdigital transducers on a yz LiNbO3 sample at a frequency of 104 MHz. A large-diameter laser beam of 5145-A wavelength and 1-W cw power was transmitted through the sample and was modulated by two acoustic waves. The double-modulated laser beam causes fringes at the recording plane, which were used for an accurate determination of the shear wave velocity vs and of the shear wave acoustic radiation angle alpha into the crystal. It was found that vs=3.547 x 10 to the 3rd power m/sec for alpha = 14.3 degrees. The shear wave conversion loss of the transducer was approximately 6 dB. (Author)

Descriptors :   (*PIEZOELECTRIC CRYSTALS, ULTRASONIC RADIATION), PIEZOELECTRIC TRANSDUCERS, LITHIUM COMPOUNDS, RAYLEIGH WAVES, TEST METHODS, CANADA, NIOBATES

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE