Temperature influence of an air conditioner in refractive index measurements using long-period fiber gratings

R. Falate; G. R. C. Possetti; R. C. Kamikawachi; J. L. Fabris; H. J. Kalinowski

doi:10.1117/12.738782

2 July 2007 Temperature influence of an air conditioner in refractive index measurements using long-period fiber gratings

R. Falate, G. R. C. Possetti, R. C. Kamikawachi, J. L. Fabris, H. J. Kalinowski

Author Affiliations +

Proceedings Volume 6619, Third European Workshop on Optical Fibre Sensors; 66193W (2007) https://doi.org/10.1117/12.738782
Event: Third European Workshop on Optical Fibre Sensors, 2007, Napoli, Italy

Abstract

The influence of temperature in the measurements of surrounding refractive index using long-period fiber gratings is studied for room temperature variations. For temperature changes close to 2°C it is verified wavelength shifts lower than 0.1 nm for the grating immersed in air and as high as 1.1 nm for a hydrocarbon sample whose refractive index is 1.4530. Sensitivity evaluations of long-period fiber gratings and evanescent fiber sensors require a temperature system control that keeps the temperature constant. Otherwise, it should be considered compensation systems that consider not only the temperature changes but also the refractive index and the thermal-optical coefficient of the materials under analysis.

Citation Download Citation

R. Falate, G. R. C. Possetti, R. C. Kamikawachi, J. L. Fabris, and H. J. Kalinowski "Temperature influence of an air conditioner in refractive index measurements using long-period fiber gratings", Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66193W (2 July 2007); https://doi.org/10.1117/12.738782

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