Estudo das propriedades térmicas e ópticas do sistema vítreo TBP dopado com Nd3+

• Autor(a) principal: Alves, Arthur de Souza Borges Zuchetti
• Data de Publicação: 2023
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UFU
• Texto Completo: https://repositorio.ufu.br/handle/123456789/38412
• topic: íons de terras raras; rare earth ions; fotoluminescência; photoluminescence; laser; laser; matrizes vítreas; vitreous matrices; CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA

Rare earth ions, such as Nd3+, have been widely studied as dopants in active laser medium due to their stability and compatibility with different host materials. Although YAG crystals are widely used in this function, glass matrices are becoming an increasingly popular solution due to their low cost. The TBP matrix, made of tellurides, has shown promise as a viable alternative to receive the Nd3+ ion due to its high energy transfer efficiency. The study observed that the dopant ion emission peaks intensity varies proportionally with temperature, with the peak at 880 nm decreasing and the peak at 808 nm growing with increasing temperature. A third peak at 750 nm becomes noticeable at temperatures above 200°C. The luminescence lifetime decreases linearly with increasing temperature. These results are consistent with the expected behavior of rare earth ions doped in glass matrices. Looking at the variation of peak emission intensity with temperature can be useful in applications such as optical thermometry, where temperature can be measured by the emission intensity of the dopant ion. Furthermore, the ability to control the intensity of wideband peaks via temperature may have implications for frequency tunable laser applications. In summary, the study presents promising results for the use of the TBP matrix as a host for the Nd3+ ion in laser applications and optical thermometry. The results indicate the TBP matrix as a good host for the Nd3+ ion and it can be a convenient solution due to its low cost. The study also highlights the importance of temperature on the dopant ion emission peaks intensity, which may have implications for temperature control and laser tuning applications.