20 April 1995 Embedded fiber optic ultrasonic sensors and generators
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Proceedings Volume 2574, Pacific Northwest Fiber Optic Sensor Workshop; (1995) https://doi.org/10.1117/12.207765
Event: Pacific Northwest Fiber Optic Sensor Workshop, 1995, Troutdale, OR, United States
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.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
John F. Dorighi, John F. Dorighi, Sridhar Krishnaswamy, Sridhar Krishnaswamy, Jan D. Achenbach, Jan D. Achenbach, } "Embedded fiber optic ultrasonic sensors and generators", Proc. SPIE 2574, Pacific Northwest Fiber Optic Sensor Workshop, (20 April 1995); doi: 10.1117/12.207765; https://doi.org/10.1117/12.207765
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