Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5403025 | Journal of Luminescence | 2009 | 7 Pages |
Abstract
Room temperature visible and near infrared optical absorption and emission spectra of Sm3+-doped lead borate titanate aluminum fluoride (LBTAF) glasses with molar composition (50âx) PbOâ30H3BO3â10TiO2â10AlF3âxSm2O3 (x=0.1, 0.5, 1.0 and 2.0) have been analyzed. Energy parameters for the 4f5 electronic configuration of Sm3+: LBTAF glasses have been evaluated using free-ion Hamiltonian model. The experimental oscillator strengths of absorption bands have been used to determine the J-O parameters. Fluorescence spectra were recorded by exciting the samples with 402 nm. Using the J-O parameters and luminescence data, the radiative transition probabilities (AR), branching ratios (βR) and stimulated emission cross-sections (Ïe) were obtained. The decay curves of 4G5/2â6H7/2 transition exhibit single exponential for lower concentration (0.1 mol%) and non-exponential for higher concentrations. This concentration quenching has been attributed to the energy transfer through cross-relaxation between Sm3+ ions. From the values of the radiative parameters, it is concluded that 1.0 mol% Sm3+-doped LBTAF glass may be used for laser active medium with emission wavelength at 600 nm.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
B.C. Jamalaiah, J. Suresh Kumar, A. Mohan Babu, T. Suhasini, L. Rama Moorthy,