Optimal wavelength pair selection and accuracy analysis of dual fiber grating sensors for simultaneously measuring strain and temperature

Ponniah Sivanesan; James S. Sirkis; Yorinobu Murata; Steven G. Buckley

doi:10.1117/1.1505638

1 October 2002 Optimal wavelength pair selection and accuracy analysis of dual fiber grating sensors for simultaneously measuring strain and temperature

Ponniah Sivanesan, James S. Sirkis, Yorinobu Murata, Steven G. Buckley

Author Affiliations +

Optical Engineering, Vol. 41, Issue 10, (October 2002). https://doi.org/10.1117/1.1505638

We investigate the wavelength selection of dual fiber grating sensors for strain and temperature measurements. Temperature and strain coefficients of fiber gratings are measured in the wavelength range of 600 to 1600 nm in Corning Flexcor-980^TM fiber. Theoretical fits are estimated using Ghosh's temperature-dependent refractive index model for optical fiber glasses. Moreover, the effect of apparent thermal strain due to the structural thermal expansion on the temperature coefficient in a surface-bonded fiber grating sensor is investigated, and numerical results for the accuracy of temperature and strain are presented. It is shown that the structural thermal properties have a large influence on the resolution and measurement accuracy of dual fiber grating sensors.

©(2002) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Ponniah Sivanesan, James S. Sirkis, Yorinobu Murata, and Steven G. Buckley "Optimal wavelength pair selection and accuracy analysis of dual fiber grating sensors for simultaneously measuring strain and temperature," Optical Engineering 41(10), (1 October 2002). https://doi.org/10.1117/1.1505638

Published: 1 October 2002

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