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Proceedings Paper

Photonic sensor for nondestructive testing applications
Author(s): An-Dien Nguyen
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Paper Abstract

This paper presents the development of a Bragg grating interrogation technique for measurements of strain, stress, temperature, and ultrasonic waves. The sensor design and instrumentation technique offer a number of advantages including sensor compactness, lightweight, low-cost, and multiplexing capability for damage detection and corrosion monitoring of advanced structures and components. Using a robust lock-in laser-based demodulation technique, simultaneous measurements of strain, temperature, and damage induced acoustic fields can be performed with high precision, high resolution, and high sensitivity. The interrogated sensor device containing an array of optical Bragg grating fibers and waveguides can be surface mounted on monitoring structures for non-destructive testing applications including highresolution strain measurement and high sensitivity damage and corrosion monitoring.

Paper Details

Date Published: 3 April 2008
PDF: 9 pages
Proc. SPIE 6935, Health Monitoring of Structural and Biological Systems 2008, 693525 (3 April 2008); doi: 10.1117/12.776432
Show Author Affiliations
An-Dien Nguyen, Los Gatos Research, Inc. (United States)

Published in SPIE Proceedings Vol. 6935:
Health Monitoring of Structural and Biological Systems 2008
Tribikram Kundu, Editor(s)

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