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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

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

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Autor(es):
Manzani, Danilo ; da Silveira Petruci, Joao Flavio ; Nigoghossian, Karina ; Cardoso, Arnaldo Alves ; Ribeiro, Sidney J. L.
Número total de Autores: 5
Tipo de documento: Artigo Científico
Fonte: SCIENTIFIC REPORTS; v. 7, JAN 31 2017.
Citações Web of Science: 34
Resumo

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)

Processo FAPESP: 10/20776-5 - Fibras ópticas especiais à base de óxido de telúrio para aplicações ópticas não lineares
Beneficiário:Danilo Manzani
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 13/22995-4 - Sensor luminescente para determinação in situ de compostos reduzidos de enxofre presentes em matrizes gasosas utilizando compostos de paládio
Beneficiário:João Flávio da Silveira Petruci
Linha de fomento: Bolsas no Brasil - Pós-Doutorado