In this work, the authors exploited the whispering gallery mode (WGM) resonator properties as a thermometer. The sensor is made of a cylindrical sapphire microwave resonator in the center of a gold-plated copper cavity. Two coaxial cables act as antennas and excite the WGM standing waves in the cylindrical sapphire at selected resonance frequencies in the microwave range. The system affords a high quality factor that enables temperature measurements with a resolution better than 15 mu K and a measurement standard uncertainty of 1.2 mK, a value approximately three times better than that achieved in previous works. The developed sensor could be a promising alternative to platinum resistance thermometers, both as a transfer standard in industrial applications and as an interpolating instrument for the dissemination of the kelvin.

Whispering Gallery Mode Resonators for Precision Temperature Metrology Applications / Gugliandolo, G; Tabandeh, S; Rosso, L; Smorgon, D; Fernicola, V. - In: SENSORS. - ISSN 1424-8220. - 21:8(2021), p. 2844. [10.3390/s21082844]

Whispering Gallery Mode Resonators for Precision Temperature Metrology Applications

Gugliandolo, G
;
Tabandeh, S;Rosso, L;Smorgon, D;Fernicola, V
2021

Abstract

In this work, the authors exploited the whispering gallery mode (WGM) resonator properties as a thermometer. The sensor is made of a cylindrical sapphire microwave resonator in the center of a gold-plated copper cavity. Two coaxial cables act as antennas and excite the WGM standing waves in the cylindrical sapphire at selected resonance frequencies in the microwave range. The system affords a high quality factor that enables temperature measurements with a resolution better than 15 mu K and a measurement standard uncertainty of 1.2 mK, a value approximately three times better than that achieved in previous works. The developed sensor could be a promising alternative to platinum resistance thermometers, both as a transfer standard in industrial applications and as an interpolating instrument for the dissemination of the kelvin.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11696/72994
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