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Author(s):
Weigel, Robert; Holm, Andreas; Russer, Peter H.; Ruile, Werner; Solkner, G. 
Title:
Accurate Optical Measurement of Surface Acoustic Wave Phase Velocity 
Abstract:
A high-resolution technique for the optical detection of the phase and amplitude of high frequency surface acoustic waves (SAW's) is presented. The test setup incorporates a mode-locked picosecond laser, harmonic mixing, and coherent detection, and it allows not only the measurement of the surface wave field but also the direct determination of the phase velocity. A measurement bandwidth in excess of 2 GHz is achieved. The maximum scan length was 4 cm. As a substrate, LiNbO3 has been used for th...    »
 
Keywords:
2 GHz, amplitude, bandwidth, dynamic range, harmonic mixing, high frequency surface acoustic waves, LiNbO3, LiNbO3 substrate, measurement by laser beam, mode-locked picosecond laser, optical measurement, phase velocity, surface acoustic wave, surface acoustic waves, surface displacement, ultrasonic velocity measurement 
Book / Congress title:
IEEE Ultrasonics Symposium 
Volume:
Publisher address:
Baltimore, MD, USA 
Year:
1993 
Month:
oct 
Pages:
319--322