Spectroscopic and photoluminescence properties of Dy-doped lead tungsten tellurite glasses for laser materials |
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Authors: | A. Mohan BabuB.C. Jamalaiah J. Suresh KumarT. Sasikala L. Rama Moorthy |
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Affiliation: | a Department of Physics, Sri Venkateswara University, Tirupati, 517 502, India b Department of Physics, Pukyong National University, Busan, 608 737, Republic of Korea |
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Abstract: | Lead tungsten tellurite (LTT) glasses doped with different Dy3+ ion concentrations have been prepared and characterized through optical absorption, photoluminescence and decay measurements. The glassy nature of the LTT host has been confirmed through the XRD measurements. The three phenomelogical intensity parameters Ωλ (λ = 2, 4, 6) have been determined from the absorption spectral intensities using the Judd-Ofelt (J-O) theory. The hypersensitivity of 6H15/2 → 6F11/2 transition based on the magnitude of Ω2 parameter has also been discussed. By using the J-O intensity parameters several radiative properties such as spontaneous transition probabilities (AR), fluorescence branching ratios (βR) and radiative lifetimes (τR) have been determined. The effect of Dy3+ ion concentration on the emission intensities of 4F9/2 → 6HJ′ (J′ = 15/2, 13/2, 11/2 and 9/2) transitions has also been reported. |
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Keywords: | Amorphous materials Solid state reactions Optical properties Luminescence |
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