TY - JOUR
T1 - Laser-generation of narrow-band surface waves
AU - Huang, Jin
AU - Krishnaswamy, Sridhar
AU - Achcnbach, Jan D.
N1 - Funding Information:
This work was carried out in the course of research sponsored by the FAA Center for Aviation Systems Reliability, operated by Ames Laboratory, USDOE, for the Federal Aviation Administration under Contract No. W-7405-ENG-82 for work by Iowa State University and Northwestern University.
Publisher Copyright:
© 1991 IEEE.
PY - 1991
Y1 - 1991
N2 - 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.
AB - 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.
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U2 - 10.1109/ULTSYM.1991.234221
DO - 10.1109/ULTSYM.1991.234221
M3 - Conference article
AN - SCOPUS:84893883795
SP - 537
EP - 541
JO - Proceedings of the IEEE Ultrasonics Symposium
JF - Proceedings of the IEEE Ultrasonics Symposium
SN - 1051-0117
M1 - 234221
T2 - 1991 IEEE Ultrasonics Symposium. ULTSYM 1991
Y2 - 8 December 1991 through 11 December 1991
ER -