Spectroscopic investigations and luminescence spectra of Nd and Dy doped different phosphate glasses |
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Authors: | M Seshadri J Lakshmana Rao YC Ratnakaram |
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Institution: | a Department of Physics, Sri Venkateswara University, Tirupati-517 502, India b Department of Physics, Indian Institute of Sciences, Bangalore-560 012, India |
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Abstract: | Spectral properties of Nd3+ and Dy3+ ions in different phosphate glasses were studied and several spectroscopic parameters were reported. Covalency of rare-earth-oxygen bond was studied in these phosphate glass matrices with the variation of modifier in host glass matrix. Using Judd-Ofelt intensity parameters (Ω2, Ω4 and Ω6), radiative transition probabilities (A) and radiative lifetimes (τR) of certain excited states of Nd3+ and Dy3+ ions are estimated in these glass matrices. From the magnitudes of branching ratios (βR) and integrated absorption cross-sections (Σ), certain transitions of both the ions are identified for laser excitation. From the emission spectra, peak stimulated emission cross-sections (σP) are evaluated for the emission transitions observed in all these phosphate glass matrices for both Nd3+ and Dy3+ ions. |
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Keywords: | Rare-earth ions Absorption spectrum Transition probability Lifetime Emission cross-section |
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