Embedded fiber optic acoustic sensor for flaw detection

Nadarajah Narendran; Stephen V. Letcher; Arun Shukla; Ram-Nandan P. Singh

doi:10.1117/12.141308

26 March 1993 Embedded fiber optic acoustic sensor for flaw detection

Nadarajah Narendran, Stephen V. Letcher, Arun Shukla, Ram-Nandan P. Singh

Proceedings Volume 1798, Fiber Optic Smart Structures and Skins V; (1993) https://doi.org/10.1117/12.141308
Event: Fibers '92, 1992, Boston, MA, United States

Abstract

The applicability of an embedded fiber-optic acoustic sensor to detect internal cracks and flaws in polymeric materials has been experimentally demonstrated. The sensor is based on a remote polarimetric technique. It has been shown that proper control of the polarization and phase of the optical beam is required to obtain meaningful results. This sensor has shown promising results in determining acoustical properties of plexiglass and obtaining information regarding the location and the extent of the flaw from the amplitude of the fiber-optic sensor signal. The sensing fiber of this sensor is not modified and is mechanically intact. Therefore it is attractive for embedded fiber-optic sensing applications.

Citation Download Citation

Nadarajah Narendran, Stephen V. Letcher, Arun Shukla, and Ram-Nandan P. Singh "Embedded fiber optic acoustic sensor for flaw detection", Proc. SPIE 1798, Fiber Optic Smart Structures and Skins V, (26 March 1993); https://doi.org/10.1117/12.141308

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