Whispering Gallery Mode Resonators for Precision Temperature Metrology Applications

Sensors

Giovanni Gugliandolo¹  Lucia Rosso²  Vito Fernicola²  Denis Smorgon²  Shahin Tabandeh³ 

[1] Department of MIFT, University of Messina, 98166 Messina, Italy;Istituto Nazionale di Ricerca Metrologica, 10135 Torino, Italy;VTT Technical Research Centre of Finland Ltd, National Metrology Institute VTT MIKES, P.O. Box 1000, FI-02044 VTT, Finland;

关键词: microwave resonators;    whispering gallery modes;    metrology;    thermometry;    temperature measurements;   

DOI  :  10.3390/s21082844

来源: DOAJ

【 摘 要 】

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 µK 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.

【 授权许可】

Unknown