Laser-generation of narrow-band surface waves

Jin Huang, Sridhar Krishnaswamy, Jan D. Achcnbach

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations

Abstract

One of the factors limiting the application of laser-based ultrasonics for nondestructive evaluation is the relatively low efficiency of ultrasound generation by laser illumination. The present paper describes a method for improved narrowband surface wave generation by the use of a line focused laser and an array technique. A tone-bursl-like surface wave has been generated by a diffraction grating and a lens system. The system provides controllable center frequency by adjustment of the width and spacing of the lines of laser illumination in the array, li has been demonstrated by the use of laser interferometer detection that the signalto-noise ratio is significantly improved.

Original languageEnglish (US)
Article number234221
Pages (from-to)537-541
Number of pages5
JournalProceedings - IEEE Ultrasonics Symposium
DOIs
StatePublished - 1991
Event1991 IEEE Ultrasonics Symposium. ULTSYM 1991 - Orlando, United States
Duration: Dec 8 1991Dec 11 1991

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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