Title :
Optical probing of nonlinear SAW waveform
Author :
Kavalerov, Vadim ; Kasaya, Naohito ; Inoue, Mitsuteru ; Fujii, Toshitaka
Author_Institution :
Toyohashi Univ. of Technol., Japan
Abstract :
A new type of laser probe of surface acoustic waves (SAW) is reported. The probe operation is based on knife-edge technique, while a pulsed laser is employed in order to sample the waveform of SAW. The spatial resolution of the probe is 1.3 μm and its bandwidth is greater than 1 GHz. Nonlinear SAW on single crystal LiNbO3 plates has been studied at the input frequency 200 MHz with the new method. It is shown that the initially sinusoidal wave breaks into a train of pulses, up to four per period. The observed spectrum of the wave included as many as 10 harmonics
Keywords :
acoustic variables measurement; lithium compounds; measurement by laser beam; nonlinear acoustics; surface acoustic waves; 1 GHz; 1.3 micron; 200 MHz; LiNbO3; LiNbO3 single crystal; harmonics; knife-edge technique; nonlinear SAW waveform; optical probing; pulsed laser; surface acoustic wave; Acoustic pulses; Acoustic waves; Bandwidth; Nonlinear optics; Optical pulses; Optical surface waves; Probes; Spatial resolution; Surface acoustic waves; Surface emitting lasers;
Conference_Titel :
Ultrasonics Symposium, 1996. Proceedings., 1996 IEEE
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-3615-1
DOI :
10.1109/ULTSYM.1996.584124
