We describe the characterization of the temperature and strain responses of fiber Bragg grating sensors by use of an interferometric interrogation technique to provide an absolute measurement of the grating wavelength. The fiber Bragg grating temperature response was found to be nonlinear over the temperature range -70 °C to 80 °C. The nonlinearity was observed to be a quadratic function of temperature, arising from the linear dependence on temperature of the thermo-optic coefficient of silica glass over this range, and is in good agreement with a theoretical model.
Bibliographical note© 2004 Optical Society of America
This paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-13-2744. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Flockhart, G. M. H., Maier, R. R. J., Barton, J. S., MacPherson, W. N., Jones, J. D. C., Chisholm, K. E., Zhang, L., Bennion, I., Read, I. J., & Foote, P. D. (2004). Quadratic behavior of fiber Bragg grating temperature coefficients. Applied Optics, 43(13), 2744-2751. https://doi.org/10.1364/AO.43.002744