Laser generation and detection of ultrasound for materials characterization

S. Gareth Pierce; Brian Culshaw; Q. Shan

doi:10.1117/12.323353

29 September 1998 Laser generation and detection of ultrasound for materials characterization

S. Gareth Pierce, Brian Culshaw, Q. Shan

Proceedings Volume 3407, International Conference on Applied Optical Metrology; (1998) https://doi.org/10.1117/12.323353
Event: International Conference on Applied Optical Metrology, 1998, Balatonfured, Hungary

Abstract

The authors describe the application of laser-ultrasonic sources in combination with interferometric detectors to monitor ultrasonic Lamb waves propagating in metal and composite structure plate samples. Using a high powered pulsed laser source, and temporally and spatially sampling the resultant acoustic field, it was possible to directly measure the Lamb wave phase velocities of several modes simultaneously. A further development has been the demonstration of a low power CW laser source capable of generating Lamb waves in a steel sample at a power density well below the ablation damage threshold.

Citation Download Citation

S. Gareth Pierce, Brian Culshaw, and Q. Shan "Laser generation and detection of ultrasound for materials characterization", Proc. SPIE 3407, International Conference on Applied Optical Metrology, (29 September 1998); https://doi.org/10.1117/12.323353

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