Blue and ultraviolet upconversion (UC) emissions at 455 and 363 nm w ere observed from Tm3+ doped fluoroindate glasses pumped with a 650 nm pulsed dye laser. The temporal behavior of the fluorescence signal originate from the D-1(2) manifolds was studied for different Tm3+ concentrations. The fluorescence measurements revealed the origin of the UC process as well as allowed to quantify the interaction between Tm3+ ions. The results indicate that a two-step absorption process is responsible for the UC emission and the dominant interaction contributing for ET among of active ions is the dipole-dipole interaction.
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Univ Fed Alagoas, Inst Fis, Av Lourival de Melo Mota S-N, BR-57072900 Maceio, AL, BrazilUniv Fed Alagoas, Inst Fis, Av Lourival de Melo Mota S-N, BR-57072900 Maceio, AL, Brazil
Rego-Filho, F. G.
Dantas, N. O.
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Univ Fed Uberlandia, Inst Fis, LNMIS, BR-38400902 Uberlandia, MG, BrazilUniv Fed Alagoas, Inst Fis, Av Lourival de Melo Mota S-N, BR-57072900 Maceio, AL, Brazil
Dantas, N. O.
Silva, A. C. A.
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Univ Fed Uberlandia, Inst Fis, LNMIS, BR-38400902 Uberlandia, MG, BrazilUniv Fed Alagoas, Inst Fis, Av Lourival de Melo Mota S-N, BR-57072900 Maceio, AL, Brazil
Silva, A. C. A.
Vermelho, M. V. D.
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Univ Fed Alagoas, Inst Fis, Av Lourival de Melo Mota S-N, BR-57072900 Maceio, AL, BrazilUniv Fed Alagoas, Inst Fis, Av Lourival de Melo Mota S-N, BR-57072900 Maceio, AL, Brazil
Vermelho, M. V. D.
Jacinto, C.
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Univ Fed Alagoas, Inst Fis, Av Lourival de Melo Mota S-N, BR-57072900 Maceio, AL, BrazilUniv Fed Alagoas, Inst Fis, Av Lourival de Melo Mota S-N, BR-57072900 Maceio, AL, Brazil
Jacinto, C.
Gouveia-Neto, A. S.
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Univ Fed Alagoas, Inst Fis, Av Lourival de Melo Mota S-N, BR-57072900 Maceio, AL, BrazilUniv Fed Alagoas, Inst Fis, Av Lourival de Melo Mota S-N, BR-57072900 Maceio, AL, Brazil