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Spectroscopic Studies on LiF/NaF/KF-Al2O3-B2O3 glasses doped with Ho2O3

Ch.Srinivasa Rao, T.Srikumar, M.C.Rao

LiF/NaF/KF-Al2O3-B2O3 glasses mixed with 1.0 mol % of Ho2O3 were synthesized by melt quenching method. The physical parameters such as rare earth ion concentration,mean rare earth ion separation andmolar volume for the prepared glass sampleswere evaluated. The spectroscopic properties like optical and IR studies have been undertaken. The study of optical absorption, particularly the absorption edge, has proved to be very useful for elucidation of the electronic structure of the materials. The optical absorption studies revealed that all possible absorption transitions are observed in the spectrumfromthe ground state 5I8. These transitions spread over near UV, Visible and NIR regions. The IR spectral studies showed the conventional bands due to borate groups, AlO4 and AlO6 structural units. These glasses find potential applications as lasermaterials, IRdomes, optical fibres, modulators, memory devices, photonic devices for communication, advanced computer applications and as semi-conducting devices.