TY  - JOUR
AU  - Benrejeb, H.
AU  - Martin, I.R.
AU  - Hraiech, S.
AU  - Soler-Carracedo, K.
KW  - Biological window
KW  - Lanthanide ions
KW  - Microsphere resonators
KW  - Optical sensor
T1  - Temperature sensor based on luminescence intensity ratio or whispering gallery modes in phosphate glass co-doped with Pr3+ and Yb3+
LA  - eng
PY  - 2022
T2  - Optics and Laser Technology
SN  - 0030-3992
VL  - 149
PB  - Elsevier Ltd
AB  - Microspheres of diameters ranging from 30 μm to 100 μm, obtained from 0.1Pr3+-0.5Yb3+ co-doped phosphate glass were fabricated and calibrated as optical temperature sensor. When the microspheres where pumped under 457 nm laser excitation, Pr3+ typical emission was observed as well as emission due to a Down Conversion (DC) process from Pr3+ to Yb3+ ions. Furthermore, whispering gallery modes (WGM) peaks superimposed to the Pr3+ and DC emission bands were observed. The microsphere was calibrated as a function of temperature using the intensity ratio of the 925 and 875 nm Pr3+ bands and the spectral red-shift from the WGM. Temperature uncertainty was obtained from both techniques obtaining values of 0.7 K and 0.4 K for the band ratio and WGM results, respectively.
DO  - 10.1016/J.OPTLASTEC.2022.107893
UR  - https://portalciencia.ull.es/documentos/6207fd09e81eae5f9eb08717
DP  - Dialnet - Portal de la Investigación
ER  -