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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A portable luminescent thermometer based on green up-conversion emission of Er3+/Yb3+ co-doped tellurite glass

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Manzani, Danilo ; da Silveira Petruci, Joao Flavio ; Nigoghossian, Karina ; Cardoso, Arnaldo Alves ; Ribeiro, Sidney J. L.
Total Authors: 5
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 7, JAN 31 2017.
Web of Science Citations: 38

The determination of temperature is essential in many applications in the biomedical, technological, and industrial fields. Optical thermometry appears to be an excellent alternative for conventional electric temperature sensors because it is a non-contact method that offers a fast response, electromagnetic passivity, and high temperature sensitivity. In this paper, we propose an optical thermometer probe comprising an Er3+/Yb3+ co-doped tellurite glass attached to the tip of an optical fibre and optically coupled to a laser source and a portable USB spectrometer. The ratio of the up-conversion green emission integrated peak areas when excited at 980 nm was temperature dependent, and it was used to calibrate the thermometer. The thermometer was operated in the range of 5-50 degrees C and 50-200 degrees C, and it revealed excellent linearity (r(2) > 0.99), suitable accuracy, and precisions of +/- 0.5 and +/- 1.1 degrees C, respectively. By optimizing Er3+ concentration, we could obtain the high green emission intensity, and in turn, high thermal sensitivity for the probe. The probe fabricated in the study exhibited suitable properties for its application as a temperature sensor and superior performance compared to other Er3+-based optical thermometers in terms of thermal sensitivity. (AU)

FAPESP's process: 13/22995-4 - Luminescent sensor for in situ determination of reduced sulfur compounds in gaseous matrices using palladium compounds
Grantee:João Flávio da Silveira Petruci
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 10/20776-5 - Special optical fiber based on tellurium oxide for nonlinear applications
Grantee:Danilo Manzani
Support type: Scholarships in Brazil - Post-Doctorate