Generation of an ultrasonic beam using embedded fiber optic delivery and low-power laser sources

Colin I. Swift; S. Gareth Pierce; Brian Culshaw

doi:10.1117/12.388109

12 June 2000 Generation of an ultrasonic beam using embedded fiber optic delivery and low-power laser sources

Colin I. Swift, S. Gareth Pierce, Brian Culshaw

Proceedings Volume 3986, Smart Structures and Materials 2000: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials; (2000) https://doi.org/10.1117/12.388109
Event: SPIE's 7th Annual International Symposium on Smart Structures and Materials, 2000, Newport Beach, CA, United States

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.

Citation Download Citation

Colin I. Swift, S. Gareth Pierce, and Brian Culshaw "Generation of an ultrasonic beam using embedded fiber optic delivery and low-power laser sources", Proc. SPIE 3986, Smart Structures and Materials 2000: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (12 June 2000); https://doi.org/10.1117/12.388109

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