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Proceedings Paper

Simultaneous measurement of temperature and strain using a single Bragg grating
Author(s): Ponniah Sivanesan; James S. Sirkis; Venki Venkat; Yucheng Shi; C. J. Reddy; Sankara N. Sankaran; Harmeet Singh
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Paper Abstract

A fiber optic sensor using the first and the second order fiber Bragg grating spectra to simultaneously measure temperature and strain is investigated. A theoretical model for estimating the wavelength and the reflectivity of the second order Bragg resonance in a fiber grating is developed, and the results are compared with the experimental results in Corning SMF 28 fiber. Moreover, technical issues regarding the sensor design such as the spectral characteristics of the Bragg gratings, bending loss in optical fibers and the higher order propagation modes are investigated. Experiments are conducted to measure the strain and temperature response of the grating sensors and compared to conventional sensors with encouraging results.

Paper Details

Date Published: 31 May 1999
PDF: 12 pages
Proc. SPIE 3670, Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (31 May 1999); doi: 10.1117/12.349718
Show Author Affiliations
Ponniah Sivanesan, Univ. of Maryland/College Park (United States)
James S. Sirkis, Univ. of Maryland/College Park (United States)
Venki Venkat, Analytical Service & Materials, Inc. (United States)
Yucheng Shi, Analytical Service & Materials, Inc. (United States)
C. J. Reddy, Analytical Service & Materials, Inc. (United States)
Sankara N. Sankaran, Analytical Service & Materials, Inc. (United States)
Harmeet Singh, Qtera Corp. (United States)


Published in SPIE Proceedings Vol. 3670:
Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials
Richard O. Claus; William B. Spillman, Editor(s)

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