Technique and results of measuring surface-acoustic-wave reflection coefficients with the use of laser sounding

A technique of measuring the surface-acoustic-wave (SAW) reflection with the use of a laser sounding facility containing a reference diffraction grating is described. The characteristics of the SAW reflections from the edges of YX-cut quartz-crystal substrates with the end faces beveled at various angles are measured. In addition, the frequency dependence of the magnitude of the SAW reflection coefficient for reflection from periodic gratings in the form of lithium niobate metal strips are measured.