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Proceedings Paper

Simultaneous strain and temperature sensing using long-period gratings
Author(s): Vikram Bhatia; David K. Campbell; Daniel Sherr; Richard O. Claus
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Paper Abstract

We present experimental results to demonstrate the simultaneous strain and temperature measurement capability of long-period gratings. It is shown that the distinct spectral shifts of the multiple resonance bands in a single grating can be employed to separate the concurrent perturbations of axial strain and temperature. Static and quasi-static tests are performed to illustrate the effectiveness of a grating written in a standard optical fiber. It is demonstrated that cross-sensitivities and non- linearities in the temperature- and strain-induced shifts result in a tradeoff between the simplicity and the dynamic range of the sensing system. The advantages and limitations of the long-period grating simultaneous sensing configurations are also discussed.

Paper Details

Date Published: 6 June 1997
PDF: 11 pages
Proc. SPIE 3042, Smart Structures and Materials 1997: Smart Sensing, Processing, and Instrumentation, (6 June 1997); doi: 10.1117/12.275726
Show Author Affiliations
Vikram Bhatia, Virginia Polytechnic Institute and State Univ. (United States)
David K. Campbell, Virginia Polytechnic Institute and State Univ. (United States)
Daniel Sherr, Virginia Polytechnic Institute and State Univ. (United States)
Richard O. Claus, Virginia Polytechnic Institute and State Univ. (United States)


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

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