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Proceedings Paper

Embedded fiber optic ultrasonic sensors and generators
Author(s): John F. Dorighi; Sridhar Krishnaswamy; Jan D. Achenbach
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Paper Abstract

Ultrasonic sensors and generators based on fiber-optic systems are described. It is shown that intrinsic fiber optic Fabry-Perot ultrasound sensors that are embedded in a structure can be stabilized by actively tuning the laser frequency. The need for this method of stabilization is demonstrated by detecting piezoelectric transducer-generated ultrasonic pulses in the presence of low frequency dynamic strains that are intentionally induced to cause sensor drift. The actively stabilized embedded fiber optic Fabry-Perot sensor is also shown to have sufficient sensitivity to detect ultrasound that is generated in the interior of a structure by means of a high-power optical fiber that pipes energy from a pulsed laser to an embedded generator of ultrasound.

Paper Details

Date Published: 20 April 1995
PDF: 8 pages
Proc. SPIE 2574, Pacific Northwest Fiber Optic Sensor Workshop, (20 April 1995); doi: 10.1117/12.207765
Show Author Affiliations
John F. Dorighi, Northwestern Univ. (United States)
Sridhar Krishnaswamy, Northwestern Univ. (United States)
Jan D. Achenbach, Northwestern Univ. (United States)


Published in SPIE Proceedings Vol. 2574:
Pacific Northwest Fiber Optic Sensor Workshop
Eric Udd, Editor(s)

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