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Proceedings Paper

Laser ultrasonics: generation and detection considerations for improved signal-to-noise ratio
Author(s): James W. Wagner; John B. Deaton; Andrew D. W. McKie; James B. Spicer
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Paper Abstract

It is shown that improvement in the detection sensitivity of laser-ultrasonic systems may be obtained by generating narrowband acoustic signals using both temporal and spatial modulation of the generating laser. A laser-generated acoustic tone burst waveform will have lower peak amplitudes than a single acoustic pulse providing the same system SNR. Consequently, lower power density laser pulses may be used to avoid surface damage.

Paper Details

Date Published: 1 January 1991
PDF: 11 pages
Proc. SPIE 1332, Optical Testing and Metrology III: Recent Advances in Industrial Optical Inspection, (1 January 1991); doi: 10.1117/12.51098
Show Author Affiliations
James W. Wagner, Johns Hopkins Univ. (United States)
John B. Deaton, Johns Hopkins Univ. (United States)
Andrew D. W. McKie, Johns Hopkins Univ. (United States)
James B. Spicer, Johns Hopkins Univ. (United States)


Published in SPIE Proceedings Vol. 1332:
Optical Testing and Metrology III: Recent Advances in Industrial Optical Inspection
Chander Prakash Grover, Editor(s)

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