Abstract
Measurements of surface acoustic waves (SAW) propagation properties such as amplitude profiles and phase and group velocities on LiNbO3 have been done using a very stable and highly sensitive laser probe which is a type two-beam interferometer with minimum detectable SAW amplitude 8×10-3 Å at 56 MHz on 127.86° rotating Y-cut LiNbO3. Amplitude profiles are measured for two types of interdigital transducers (IDT) with ten parallel finger pairs and ten circular-arc finger pairs. Results of phase velocity measurements are shown on a table and compared with the literature1) for certain orientations of LiNbO3 or LiTaO3.
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