18 August 1995 Laser ultrasound system with embedded fiber optic interferometric sensor
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Proceedings Volume 2622, Optical Engineering Midwest '95; (1995) https://doi.org/10.1117/12.216818
Event: Optical Engineering Midwest '95, 1995, Chicago, IL, United States
Abstract
A localized fiber optic interferometric sensor was embedded in an epoxy plate for the purpose of detecting ultrasound. The sensor embedded was a low finesse Fabry-Perot, which was actively stabilized by tuning the laser frequency. The embedded sensor was used to detect ultrasound generated by a range of techniques which included: i) a 5 MHz piezoelectric transducer, ii) surface laser generated ultrasound, iii) laser generated ultrasound using an embedded fiber generator, and iv) a simulated acoustic emission event (lead pencil break). The frequency content of these signals ranged from the hundreds of kilohertz to beyond 5 MHz. The embedded FOFP was able to detect all of the signals generated, indicating its utility as a broadband ultrasound detector.
© (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, } "Laser ultrasound system with embedded fiber optic interferometric sensor", Proc. SPIE 2622, Optical Engineering Midwest '95, (18 August 1995); doi: 10.1117/12.216818; https://doi.org/10.1117/12.216818
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