1 January 1991 Laser ultrasonics: generation and detection considerations for improved signal-to-noise ratio
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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.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
James W. Wagner, John B. Deaton, Andrew D. W. McKie, James B. Spicer, "Laser ultrasonics: generation and detection considerations for improved signal-to-noise ratio", Proc. SPIE 1332, Optical Testing and Metrology III: Recent Advances in Industrial Optical Inspection, (1 January 1991); doi: 10.1117/12.51098; https://doi.org/10.1117/12.51098
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