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John Quintavalle  - - - 
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Zeeshan Ahmed

41 shared publications

National Institute of Standards and Technology, 100 Bureau Dr. Gaithersburg, Maryland 20899

James Filla

4 shared publications

Innovations and Solutions Division, National Institute of Standards and Technology, Gaithersburg, MD 20899

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Article 0 Reads 1 Citation Fiber Bragg Grating Based Thermometry Zeeshan Ahmed, James Filla, William Guthrie, John Quintavall... Published: 12 May 2016
NCSLI Measure, doi: 10.1080/19315775.2015.11721744
DOI See at publisher website PubMed View at PubMed ABS Show/hide 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.
PREPRINT 0 Reads 0 Citations Fiber Bragg Grating Based Thermometry Zeeshan Ahmed, James Filla, William Guthrie, John Quintavall... Published: 24 March 2016
ABS Show/hide 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 a hermetically sealed dry Argon environment, that 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 the peak center fitting and by thermal aging of polyimide coated fibers.
PREPRINT 0 Reads 0 Citations Developing Microwave Photonic Temperature Sensors Arec Jamgochian, John Quintavalle, Alejandra Torres-Diaz, Ja... Published: 06 August 2015
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In recent years there has been considerable interest in exploiting the temperature dependence of sapphire whispering gallery mode frequency to develop a mechanically stable, high accuracy temperature sensor. Disk-resonator-based devices have been demonstrated to measure temperature with .01 K or better accuracy in the temperature range of 273 K to 373 K. Here we have utilized automated data acquisition and processing to rapidly evaluate a mechanically-stabilized sapphire whispering gallery mode resonator based on a hollow cylinder configuration.
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