High resolution, high sensitivity, dynamic distributed structural monitoring using optical frequency domain reflectometry

Stephen T. Kreger; Alex K. Sang; Naman Garg; Julia Michel

doi:10.1117/12.2018237

29 May 2013 High resolution, high sensitivity, dynamic distributed structural monitoring using optical frequency domain reflectometry

Stephen T. Kreger, Alex K. Sang, Naman Garg, Julia Michel

Author Affiliations +

Proceedings Volume 8722, Fiber Optic Sensors and Applications X; 87220D (2013) https://doi.org/10.1117/12.2018237
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

Abstract

Fiber-optic ultrasonic transducers are an important component of an active ultrasonic testing system for structural health monitoring. Fiber-optic transducers have several advantages such as small size, light weight, and immunity to electromagnetic interference that make them much more attractive than the current available piezoelectric transducers, especially as embedded and permanent transducers in active ultrasonic testing for structural health monitoring. In this paper, a distributed fiber-optic laser-ultrasound generation based on the ghost-mode of tilted fiber Bragg gratings is studied. The influences of the laser power and laser pulse duration on the laser-ultrasound generation are investigated. The results of this paper are helpful to understand the working principle of this laser-ultrasound method and improve the ultrasonic generation efficiency.

Citation Download Citation

Stephen T. Kreger, Alex K. Sang, Naman Garg, and Julia Michel "High resolution, high sensitivity, dynamic distributed structural monitoring using optical frequency domain reflectometry", Proc. SPIE 8722, Fiber Optic Sensors and Applications X, 87220D (29 May 2013); https://doi.org/10.1117/12.2018237

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