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Proceedings Paper

Generation of an ultrasonic beam using embedded fiber optic delivery and low-power laser sources
Author(s): Colin I. Swift; S. Gareth Pierce; Brian Culshaw
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Paper Abstract

A linear array of embedded optical fibers was utilized to produce an ultrasonic beam in carbon composite plates as a potential tool for structural assessment. The embedded fibers were used to deliver laser pulses from low power (1.5 W) modulated laser diode sources for the generation of the ultrasound. These were modulated with a pseudorandom binary sequence, which was used in conjunction with a correlation based detection technique using interferometric fiber optic sensors. Furthermore time delays could be used to adjust the excitation of the elements in the array, thus enabling the direction of the generated ultrasonic beam to be controlled.

Paper Details

Date Published: 12 June 2000
PDF: 7 pages
Proc. SPIE 3986, Smart Structures and Materials 2000: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (12 June 2000); doi: 10.1117/12.388109
Show Author Affiliations
Colin I. Swift, Univ. of Strathclyde (United Kingdom)
S. Gareth Pierce, Univ. of Strathclyde (United Kingdom)
Brian Culshaw, Univ. of Strathclyde (United Kingdom)


Published in SPIE Proceedings Vol. 3986:
Smart Structures and Materials 2000: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials
Richard O. Claus; William B. Spillman, Editor(s)

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