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, James W. Wagner, John B. Deaton, John B. Deaton, Andrew D. W. McKie, Andrew D. W. McKie, James B. Spicer, 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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