Caracterização do LiNbO3:Er+3 como meio ativo para lasers de estado sólido através dos espectros de absorção/emissão polarizada e medida dos tempos de vida de luminescência. / Characterization of LiNbO3:Er+3 as active media for solid-state lasers through polarized absorption/ emission spectra and measurements of luminescence lifetime.
AUTOR(ES)
Debora Marcondes Bastos Pereira Milori
DATA DE PUBLICAÇÃO
1989
RESUMO
This work consists in the optical characterization of LiNbO3:Er3+ single crystals, aiming to verify the possibility of this system being an active media for laser. The absorption and emission results were satisfactory, being compatible enough with the theoretical model adopted. The luminescence lifetime of the 4S3/2 - 4I15/2 e 4F9/2 - 4I15/2 transitions was measured at the ambient and liquid nitrogen temperature, showing that they are possible candidates for laser transitions. The behavior of the undesirable OH- and Fe2+ impurities was also studied through thermal treatment. The control of these concentrations was done using the EPR and optical absorption techniques and the results showed it is possible to eliminate such impurities in a totally controlled way.
ASSUNTO(S)
luminescence luminescência linbo3 spectroscopy linbo3 lasers espectroscopia lasers
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