An optical fibre sensor for acoustic wave mode decomposition

N. Rajic; C. Davis; C. Rosalie

doi:10.1117/12.775957

8 April 2008 An optical fibre sensor for acoustic wave mode decomposition

N. Rajic, C. Davis, C. Rosalie

Proceedings Volume 6932, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008; 69323G (2008) https://doi.org/10.1117/12.775957
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2008, San Diego, California, United States

Abstract

This paper reports on the development of an optical fibre sensor comprising an array of uniformly distributed Bragg gratings that are configured to allow for the detection and modal decomposition of structural plate waves. Aspects of the design, fabrication and validation of the sensor are discussed. Laser vibrometry (LV) and advanced numerical modeling are used to demonstrate the fidelity of dynamic strain measurements furnished by a fibre Bragg grating. The sensor is applied in an experimental study involving a metal plate where it is shown that mode conversion of Lamb waves caused by a structural inhomogeneity is robustly measured.

Citation Download Citation

N. Rajic, C. Davis, and C. Rosalie "An optical fibre sensor for acoustic wave mode decomposition", Proc. SPIE 6932, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008, 69323G (8 April 2008); https://doi.org/10.1117/12.775957

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