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

Autor(es)

Manzani, Danilo ; da Silveira Petruci, Joao Flavio ; Nigoghossian, Karina ; Cardoso, Arnaldo Alves ; Ribeiro, Sidney J. L.

• 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