Accurate optical measurement of surface acoustic wave phase velocity
Weigel R, Holm A, Russer P, Ruile W, Soelkner G (1993)
Publication Type: Conference contribution
Publication year: 1993
Publisher: IEEE
Book Volume: 1
Pages Range: 319-322
Conference Proceedings Title: IEEE Ultrasonics Symposium
Event location: Baltimore, MD , USA
ISBN: 978-0-7803-2012-3
DOI: 10.1109/ULTSYM.1993.339564
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 the test measurements. Minimum detectable surface displacement and dynamic range were 1 pm/Hz1/2 and 40 dB, respectively. The method enables the determination of the phase velocity with a resolution of 1.5·10-5 in dependence of crystal cut, temperature and frequency
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APA:
Weigel, R., Holm, A., Russer, P., Ruile, W., & Soelkner, G. (1993). Accurate optical measurement of surface acoustic wave phase velocity. In IEEE Ultrasonics Symposium (pp. 319-322). Baltimore, MD , USA: IEEE.
MLA:
Weigel, Robert, et al. "Accurate optical measurement of surface acoustic wave phase velocity." Proceedings of the IEEE Ultrasonics Symposium, Baltimore, MD , USA IEEE, 1993. 319-322.
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