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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 33, Iss. 6 — Feb. 20, 1994
  • pp: 1051–1058

Variable-cavity-length mode-locked Nd:YAG laser for noncontact generation and spectral control of narrow-band ultrasound

John B. Deaton, Jr. and James W. Wagner  »View Author Affiliations


Applied Optics, Vol. 33, Issue 6, pp. 1051-1058 (1994)
http://dx.doi.org/10.1364/AO.33.001051


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Abstract

A passively mode-locked, flash-lamp-pumped long-cavity Nd:YAG laser was developed with a cavity length that was variable in discrete increments from approximately 11 to 60 m, permitting adjustment of the mode-locked pulse repetition frequency over a range from 13 to 2.5 MHz. Multiple-pulse acoustic signals were generated with this laser in an aluminum sample and remotely detected by a path-stabilized Michelson interferometer. The energy in the multiple-pulse acoustic signal was confined to a considerably reduced spectral range compared with that in a single pulse. Successful laser generation of spectrally selective narrow-band ultrasound presents new opportunities to integrate advanced signal-processing strategies with interferometric detection to enhance the sensitivity of laser ultrasonics for industrial applications.

© 1994 Optical Society of America

History
Original Manuscript: February 4, 1993
Published: February 20, 1994

Citation
John B. Deaton and James W. Wagner, "Variable-cavity-length mode-locked Nd:YAG laser for noncontact generation and spectral control of narrow-band ultrasound," Appl. Opt. 33, 1051-1058 (1994)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-33-6-1051

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