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Spectroscopic and emission properties of Sm 3+doped lead fluoroborate glasses containing alkaline earth metal oxides for efficient visible lasers

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Lead lithium zinc fluoroborate glasses containing alkaline-earth metal oxides doped with Sm3+ ions with chemical composition 20PbF2–10Li2O–5RO–5ZnO–59B2O3–1Sm2O3(mol%) (LLRZFB:Sm) have been prepared using the conventional melt-quenching technique. Various physical and optical parameters have been determined from the measured density and refractive index values. The amorphous nature of the glasses has been confirmed through x-ray diffraction. The optical properties were studied using optical absorption, luminescence and life-time measurements. The bonding parameters and oscillator strengths were determined from absorption spectra. The radiative properties such as radiative transition rates, branching ratios and radiative life times of the Sm3+ions corresponding to the 4G5/26HJ (J=5/2, 7/2, 9/2 and 11/2) excited state transitions have been calculated using Judd–Ofelt analysis. The visible emission spectra of these glasses exhibited a reddish-orange emission and the decay curve of 4G5/2 level exhibited non-exponential behaviour. Based on the emission characteristic parameters of 4G5/2 level, the utility of these glasses as visible laser active materials is discussed.
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Document Type: Research Article

Publication date: 01 June 2016

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