title: Fiber Bragg Grating Based Thermometry.
abstract: In recent years there has been considerable interest in developing photonic temperature sensors such as the Fiber Bragg gratings (FBG) as an alternative to resistance thermometry. In this study we examine the thermal response of FBGs over the temperature range of 233 K to 393 K. We demonstrate, in hermetically sealed dry Argon environment, FBG devices show a quadratic dependence on temperature with expanded uncertainties (k=2) of ≈500 mK. Our measurements indicate that the combined measurement uncertainty is dominated by uncertainty in determining peak center fitting and thermal ageing of polyimide coated fibers.
authors.affiliation: Thermodynamic Metrology Group, National Institute of Standards and Technology, Gaithersburg, MD 20899.
authors.forename: Zeeshan
authors.initials: Z
authors.lastname: Ahmed
authors.affiliation: Innovations and Solutions Division, National Institute of Standards and Technology, Gaithersburg, MD 20899.
authors.forename: James
authors.initials: J
authors.lastname: Filla
authors.affiliation: Statistical Engineering Division, Information Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899.
authors.forename: William
authors.initials: W
authors.lastname: Guthrie
authors.affiliation: Innovations and Solutions Division, National Institute of Standards and Technology, Gaithersburg, MD 20899.
authors.forename: John
authors.initials: J
authors.lastname: Quintavalle