Share Email Print
cover

Proceedings Paper

Grating-based optical fiber sensors for structual analysis
Author(s): Vikram Bhatia; David K. Campbell; Marten J. de Vries; Daniel Sherr; Tiffanie D'Alberto; Vivek Arya; Richard O. Claus; Christopher Peter Nemarich
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Long-period gratings have recently gained popularity as versatile optical fiber sensing elements that are simple and economical to fabricate and demodulate. Long-period gratings are periodic photoinduced structures in fiber cores that couple light from guided to cladding modes. We discuss the applications of these devices to strain measurements in high-performance materials and structures. Experimental results from a preliminary loading test carried out on a reinforcing-bar commonly used in civil structures are presented. The temperature cross-sensitivity of long-period grating-based strain sensors is analyzed and two methods to overcome this limitation are presented. We also demonstrate that strain-insensitive long-period gratings can be fabricated in standard optical fibers. The application of such gratings to temperature measurements in the presence of actively varying axial strain is discussed. Preliminary results indicate that long-period gratings hold tremendous potential for health monitoring of advanced materials and structures.

Paper Details

Date Published: 6 June 1997
PDF: 10 pages
Proc. SPIE 3042, Smart Structures and Materials 1997: Smart Sensing, Processing, and Instrumentation, (6 June 1997); doi: 10.1117/12.275760
Show Author Affiliations
Vikram Bhatia, Virginia Polytechnic Institute and State Univ. (United States)
David K. Campbell, Virginia Polytechnic Institute and State Univ. (United States)
Marten J. de Vries, Virginia Polytechnic Institute and State Univ. (United States)
Daniel Sherr, Virginia Polytechnic Institute and State Univ. (United States)
Tiffanie D'Alberto, Virginia Polytechnic Institute and State Univ. (United States)
Vivek Arya, Virginia Polytechnic Institute and State Univ. (United States)
Richard O. Claus, Virginia Polytechnic Institute and State Univ. (United States)
Christopher Peter Nemarich, Naval Surface Warfare Ctr. (United States)


Published in SPIE Proceedings Vol. 3042:
Smart Structures and Materials 1997: Smart Sensing, Processing, and Instrumentation
Richard O. Claus, Editor(s)

© SPIE. Terms of Use
Back to Top